1
|
Ding B, Ding Y, Peng J, Romano-deGea J, Frederiksen LEK, Kanda H, Syzgantseva OA, Syzgantseva MA, Audinot JN, Bour J, Zhang S, Wirtz T, Fei Z, Dörflinger P, Shibayama N, Niu Y, Hu S, Zhang S, Tirani FF, Liu Y, Yang GJ, Brooks K, Hu L, Kinge S, Dyakonov V, Zhang X, Dai S, Dyson PJ, Nazeeruddin MK. Dopant-additive synergism enhances perovskite solar modules. Nature 2024; 628:299-305. [PMID: 38438066 PMCID: PMC11006611 DOI: 10.1038/s41586-024-07228-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 02/22/2024] [Indexed: 03/06/2024]
Abstract
Perovskite solar cells (PSCs) are among the most promising photovoltaic technologies owing to their exceptional optoelectronic properties1,2. However, the lower efficiency, poor stability and reproducibility issues of large-area PSCs compared with laboratory-scale PSCs are notable drawbacks that hinder their commercialization3. Here we report a synergistic dopant-additive combination strategy using methylammonium chloride (MACl) as the dopant and a Lewis-basic ionic-liquid additive, 1,3-bis(cyanomethyl)imidazolium chloride ([Bcmim]Cl). This strategy effectively inhibits the degradation of the perovskite precursor solution (PPS), suppresses the aggregation of MACl and results in phase-homogeneous and stable perovskite films with high crystallinity and fewer defects. This approach enabled the fabrication of perovskite solar modules (PSMs) that achieved a certified efficiency of 23.30% and ultimately stabilized at 22.97% over a 27.22-cm2 aperture area, marking the highest certified PSM performance. Furthermore, the PSMs showed long-term operational stability, maintaining 94.66% of the initial efficiency after 1,000 h under continuous one-sun illumination at room temperature. The interaction between [Bcmim]Cl and MACl was extensively studied to unravel the mechanism leading to an enhancement of device properties. Our approach holds substantial promise for bridging the benchtop-to-rooftop gap and advancing the production and commercialization of large-area perovskite photovoltaics.
Collapse
Affiliation(s)
- Bin Ding
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Yong Ding
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, P. R. China.
| | - Jun Peng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, P. R. China
| | - Jan Romano-deGea
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Lindsey E K Frederiksen
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Hiroyuki Kanda
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Olga A Syzgantseva
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | | | - Jean-Nicolas Audinot
- Advanced Instrumentation for Nano-Analytics (AINA), Materials Research and Technology (MRT) Department, Luxembourg Institute of Science and Technology (LIST), Belvaux, Luxembourg
| | - Jerome Bour
- Advanced Instrumentation for Nano-Analytics (AINA), Materials Research and Technology (MRT) Department, Luxembourg Institute of Science and Technology (LIST), Belvaux, Luxembourg
| | - Song Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, P. R. China
| | - Tom Wirtz
- Advanced Instrumentation for Nano-Analytics (AINA), Materials Research and Technology (MRT) Department, Luxembourg Institute of Science and Technology (LIST), Belvaux, Luxembourg
| | - Zhaofu Fei
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Patrick Dörflinger
- Institute of Physics, Julius Maximilian University of Würzburg, Würzburg, Germany
| | - Naoyuki Shibayama
- Faculty of Biomedical Engineering, Graduate School of Engineering, Toin University of Yokohama, Yokohama, Japan
| | - Yunjuan Niu
- Key Laboratory of Photovoltaic and Energy Conservation Materials, CAS, Institute of Solid-State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China
| | - Sixia Hu
- Materials Characterization and Preparation Center, Southern University of Science and Technology, Shenzhen, P. R. China
| | - Shunlin Zhang
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Farzaneh Fadaei Tirani
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Yan Liu
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Guan-Jun Yang
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, P. R. China
| | - Keith Brooks
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Linhua Hu
- Key Laboratory of Photovoltaic and Energy Conservation Materials, CAS, Institute of Solid-State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China
| | - Sachin Kinge
- Materials Engineering Division, Toyota Technical Centre, Toyota Motor Europe, Zaventem, Belgium
| | - Vladimir Dyakonov
- Institute of Physics, Julius Maximilian University of Würzburg, Würzburg, Germany
| | - Xiaohong Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, P. R. China.
| | - Songyuan Dai
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, P. R. China
| | - Paul J Dyson
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Mohammad Khaja Nazeeruddin
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| |
Collapse
|
2
|
Nagaoka K, Iwanaga N, Takegoshi Y, Murai Y, Kawasuji H, Miura M, Sato Y, Hatakeyama Y, Ito H, Kato Y, Shibayama N, Terasaki Y, Fujimura T, Takazono T, Kosai K, Sugano A, Morinaga Y, Yanagihara K, Mukae H, Yamamoto Y. Mortality risk factors and fulminant sub-phenotype in anaerobic bacteremia: a 10-year retrospective, multicenter, observational cohort study. Eur J Clin Microbiol Infect Dis 2024; 43:459-467. [PMID: 38172403 DOI: 10.1007/s10096-023-04743-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024]
Abstract
PURPOSE During the last decade, the incidence of anaerobic bacteremia (AB) has been increasing. Patients with AB may develop complex underlying diseases, which can occasionally be accompanied by fatal or fulminant outcomes. However, the risk factors for AB-related mortality remain unclear. Herein, we sought to elucidate the risk factors for AB-related mortality. METHODS In this multicenter, retrospective, observational study, we enrolled patients with culture-proven AB from six tertiary hospitals in Japan, between January 2012 and December 2021. Data on patient and infection characteristics, laboratory findings, treatment, and outcome were collected, and their associations with mortality were analyzed. RESULTS A total of 520 participants were included. The 30-day mortality in the study cohort was 14.0% (73 patients), and malignant tumors were frequently observed comorbidities in 48% of the entire cohort. Multivariable logistic regression analysis showed a Charlson comorbidity score of > 6, serum creatinine level of > 1.17 mg/dL, and hypotension to be independent risk factors for 30-day mortality in AB (odds ratios [ORs] 2.12, 2.25, and 5.12, respectively; p < 0.05), whereas drainage significantly reduced this risk (OR, 0.28; p < 0.0001). Twelve patients (2.3% of the whole cohort and 16.4% of the deceased patients) presented with extremely rapid progression leading to fatal outcome, consistent with "fulminant AB." CONCLUSIONS This study identified acute circulatory dysfunction and performance of drainage as independent predictive factors for 30-day AB-related mortality and revealed the existence of a fulminant AB sub-phenotype. Our findings could serve as a practical guide to predict the clinical outcomes of AB.
Collapse
Affiliation(s)
- Kentaro Nagaoka
- Department of Clinical Infectious Diseases, Toyama University Graduate School of Medicine and Pharmaceutical Sciences, 2630 Sugitani, Toyama, 930-0194, Japan.
| | - N Iwanaga
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Y Takegoshi
- Department of Clinical Infectious Diseases, Toyama University Graduate School of Medicine and Pharmaceutical Sciences, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Y Murai
- Department of Clinical Infectious Diseases, Toyama University Graduate School of Medicine and Pharmaceutical Sciences, 2630 Sugitani, Toyama, 930-0194, Japan
| | - H Kawasuji
- Department of Clinical Infectious Diseases, Toyama University Graduate School of Medicine and Pharmaceutical Sciences, 2630 Sugitani, Toyama, 930-0194, Japan
| | - M Miura
- Department of Infection Control, Toyama Nishi General Hospital, Toyama, Japan
| | - Y Sato
- Department of Infection Control, Kamiichi General Hospital, Toyama, Japan
| | - Y Hatakeyama
- Department of Infection Control, Takaoka City Hospital, Toyama, Japan
| | - H Ito
- Department of Infection Control, Takaoka City Hospital, Toyama, Japan
| | - Y Kato
- Department of Infection Control, Toyama City Hospital, Toyama, Japan
| | - N Shibayama
- Department of Infection Control, Toyama City Hospital, Toyama, Japan
| | - Y Terasaki
- Department of Infection Control, Toyama City Hospital, Toyama, Japan
| | - T Fujimura
- Department of Infection Control, Toyama City Hospital, Toyama, Japan
| | - T Takazono
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - K Kosai
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - A Sugano
- Center for Clinical Research, Toyama University Hospital, Toyama, Japan
| | - Y Morinaga
- Department of Microbiology, Toyama University Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
| | - K Yanagihara
- Department of Laboratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - H Mukae
- Department of Respiratory Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Y Yamamoto
- Department of Clinical Infectious Diseases, Toyama University Graduate School of Medicine and Pharmaceutical Sciences, 2630 Sugitani, Toyama, 930-0194, Japan
| |
Collapse
|
3
|
Liu C, Sun X, Yang Y, Syzgantseva OA, Syzgantseva MA, Ding B, Shibayama N, Kanda H, Fadaei Tirani F, Scopelliti R, Zhang S, Brooks KG, Dai S, Cui G, Irwin MD, Shao Z, Ding Y, Fei Z, Dyson PJ, Nazeeruddin MK. Retarding solid-state reactions enable efficient and stable all-inorganic perovskite solar cells and modules. Sci Adv 2023; 9:eadg0087. [PMID: 37235654 DOI: 10.1126/sciadv.adg0087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 04/21/2023] [Indexed: 05/28/2023]
Abstract
All-inorganic CsPbI3 perovskite solar cells (PSCs) with efficiencies exceeding 20% are ideal candidates for application in large-scale tandem solar cells. However, there are still two major obstacles hindering their scale-up: (i) the inhomogeneous solid-state synthesis process and (ii) the inferior stability of the photoactive CsPbI3 black phase. Here, we have used a thermally stable ionic liquid, bis(triphenylphosphine)iminium bis(trifluoromethylsulfonyl)imide ([PPN][TFSI]), to retard the high-temperature solid-state reaction between Cs4PbI6 and DMAPbI3 [dimethylammonium (DMA)], which enables the preparation of high-quality and large-area CsPbI3 films in the air. Because of the strong Pb-O contacts, [PPN][TFSI] increases the formation energy of superficial vacancies and prevents the undesired phase degradation of CsPbI3. The resulting PSCs attained a power conversion efficiency (PCE) of 20.64% (certified 19.69%) with long-term operational stability over 1000 hours. A record efficiency of 16.89% for an all-inorganic perovskite solar module was achieved, with an active area of 28.17 cm2.
Collapse
Affiliation(s)
- Cheng Liu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Xiuhong Sun
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Yi Yang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Olga A Syzgantseva
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Maria A Syzgantseva
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
- Department of Nanotechnology and Nanomaterials, Mendeleev University of Chemical Technology, Moscow 125047, Russia
| | - Bin Ding
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Naoyuki Shibayama
- Department of Clinical Engineering, Toin Yokohama University, 1614 Kurogane, Aoba, Yokohama, Japan
| | - Hiroyuki Kanda
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Farzaneh Fadaei Tirani
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Shunlin Zhang
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China
| | - Keith G Brooks
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Songyuan Dai
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
| | - Guanglei Cui
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | | | - Zhipeng Shao
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Yong Ding
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Zhaofu Fei
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Paul J Dyson
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Mohammad Khaja Nazeeruddin
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
| |
Collapse
|
4
|
Zhang Y, Deng L, Cho Y, Lee J, Shibayama N, Zhang Z, Wang C, Hu Z, Wang J, Wu F, Chen L, Du Y, Ren F, Yang C, Gao P. Revealing the Enhanced Thermoelectric Properties of Controllably Doped Donor-Acceptor Copolymer: The Impact of Regioregularity. Small 2023; 19:e2206233. [PMID: 36592416 DOI: 10.1002/smll.202206233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Albeit considerable attention to the fast-developing organic thermoelectric (OTE) materials due to their flexibility and non-toxic features, it is still challenging to design an OTE polymer with superior thermoelectric properties. In this work, two "isomorphic" donor-acceptor (D-A) conjugated polymers are studied as the semiconductor in OTE devices, revealing for the first time the internal mechanism of regioregularity on thermoelectric performances in D-A type polymers. A higher molecular structure regularity can lead to higher crystalline order and mobility, higher doping efficiency, order of energy state, and thermoelectric (TE) performance. As a result, the regioregular P2F exhibits a maximum power factor (PF) of up to 113.27 µW m-1 K-2 , more than three times that of the regiorandom PRF (35.35 µW m-1 K-2 ). However, the regular backbone also implies lower miscibility with a dopant, negatively affecting TE performance. Therefore, the trade-off between doping efficiency and miscibility plays a vital role in OTE materials, and this work sheds light on the molecular design strategy of OTE polymers with state-of-the-art performances.
Collapse
Affiliation(s)
- Yingyao Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Laboratory of Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Longhui Deng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Laboratory of Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Yongjoon Cho
- School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, 44919, Ulsan, South Korea
- Department of Chemistry and Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Jungho Lee
- School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, 44919, Ulsan, South Korea
- Samsung Electro-Mechanics Co, Ltd., 150, Maeyeong-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16674, Republic of Korea
| | - Naoyuki Shibayama
- Naoyuki Shibayama, Department of Engineering, Toin University of Yokohama, 1614 Kurogane-cho, Aoba, Yokohama, Kanagawa, 225-8503, Japan
| | - Zilong Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Laboratory of Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Can Wang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Laboratory of Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Zhenyu Hu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Laboratory of Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Jing Wang
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, 330031, Nanchang, China
| | - Feiyan Wu
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, 330031, Nanchang, China
| | - Lie Chen
- College of Chemistry, Nanchang University, 999 Xuefu Avenue, 330031, Nanchang, China
| | - Yitian Du
- Institute of Materials Physical Chemistry, Huaqiao University, Xiamen, 361021, China
| | - Fangbin Ren
- Xiamen University of Technology, Xiamen, 361024, China
| | - Changduk Yang
- School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, 44919, Ulsan, South Korea
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, 44919, Ulsan, South Korea
| | - Peng Gao
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
- Laboratory of Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China
| |
Collapse
|
5
|
Wang C, Gao Y, Qiu ZL, Sun PP, Shibayama N, Zhang Z, Xiong Q, Ren F, Lien SY, Liang L, Zhang J, Tan YZ, Gao P. D
6h
Symmetric Radical Donor-Acceptor Nanographene Modulated Interfacial Carrier Transfer for High-Performance Perovskite Solar Cells. CCS Chem 2022. [DOI: 10.31635/ccschem.022.202202433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
6
|
Xiao Y, Wang H, Awai F, Shibayama N, Kubo T, Nakazaki J, Segawa H. Halide-ligand-dependent performance of AgBiS 2 nanocrystal/ZnO heterojunction solar cells. CHEM LETT 2022. [DOI: 10.1246/cl.220331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yun Xiao
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Haibin Wang
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku,Tokyo 153-8902, Japan
| | - Fumiyasu Awai
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku,Tokyo 153-8902, Japan
| | - Naoyuki Shibayama
- Department of Engineering, Toin University of Yokohama, 1614 Kurgane-cho, Aoba, Yokohama, Kanagawa 225-8503, Japan
| | - Takaya Kubo
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Jotaro Nakazaki
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Hiroshi Segawa
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku,Tokyo 153-8902, Japan
| |
Collapse
|
7
|
Xiao Y, Wang H, Awai F, Shibayama N, Kubo T, Segawa H. Emission Spectroscopy Investigation of the Enhancement of Carrier Collection Efficiency in AgBiS 2-Nanocrystal/ZnO-Nanowire Heterojunction Solar Cells. ACS Appl Mater Interfaces 2022; 14:6994-7003. [PMID: 35099930 DOI: 10.1021/acsami.1c21762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Eco-friendly solar cells were fabricated using interdigitated layers comprising ZnO nanowires (NWs) and infrared absorbing AgBiS2 nanocrystals (ITO/ZnO NWs/AgBiS2/P3HT/Au). The quality of ZnO NWs was studied using photoluminescence and Raman spectroscopy to identify the defects in ZnO NWs influencing solar cell performance. Oxygen vacancies and Zn interstitial sites, among various recombination sites, were observed to be the main sites for carrier recombination, which hinders the carrier collection in the solar cells. Accordingly, the power conversion efficiency of AgBiS2 solar cells exhibited a good correlation with the number of oxygen vacancies. The structural order and electron-phonon interaction in ZnO NWs were also investigated via Raman scattering spectroscopy. A lower concentration of oxygen vacancies and zinc interstitials (Zni) resulted in a higher structural order as well as a weaker electron-phonon interaction in ZnO NWs. When ZnO NWs were treated at 500 °C in oxygen with the lowest oxygen vacancy concentration, the solar cells (500-O2 solar cell (SC)) demonstrated an external quantum efficiency of approximately 70% in the visible region and a corresponding internal quantum efficiency of more than 80%. The 500-O2 SC exhibited a power conversion efficiency of 5.41% (JSC = 22.21 mA/cm2, VOC = 0.41 V, and FF = 60%) under quasi one-sun illumination. New methods that can efficiently reduce oxygen vacancies and Zni without affecting the structural order of ZnO NWs would further enhance the carrier collection efficiency. Moreover, since ZnO is a key electron transport material for constructing not only colloidal quantum dot solar cells but also other emerging solar cells, such as organic thin-film solar cells, the present findings provide significant information for improving their performance.
Collapse
Affiliation(s)
- Yun Xiao
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Haibin Wang
- Graduate School Arts & Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Fumiyasu Awai
- Graduate School Arts & Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Naoyuki Shibayama
- Graduate School Arts & Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Takaya Kubo
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Hiroshi Segawa
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
- Graduate School Arts & Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| |
Collapse
|
8
|
Liu C, Igci C, Yang Y, Syzgantseva OA, Syzgantseva MA, Rakstys K, Kanda H, Shibayama N, Ding B, Zhang X, Jankauskas V, Ding Y, Dai S, Dyson PJ, Nazeeruddin MK. Dopant-Free Hole Transport Materials Afford Efficient and Stable Inorganic Perovskite Solar Cells and Modules. Angew Chem Int Ed Engl 2021; 60:20489-20497. [PMID: 34223674 PMCID: PMC8456866 DOI: 10.1002/anie.202107774] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Indexed: 11/22/2022]
Abstract
The emerging CsPbI3 perovskites are highly efficient and thermally stable materials for wide-band gap perovskite solar cells (PSCs), but the doped hole transport materials (HTMs) accelerate the undesirable phase transition of CsPbI3 in ambient. Herein, a dopant-free D-π-A type HTM named CI-TTIN-2F has been developed which overcomes this problem. The suitable optoelectronic properties and energy-level alignment endow CI-TTIN-2F with excellent charge collection properties. Moreover, CI-TTIN-2F provides multisite defect-healing effects on the defective sites of CsPbI3 surface. Inorganic CsPbI3 PSCs with CI-TTIN-2F HTM feature high efficiencies up to 15.9 %, along with 86 % efficiency retention after 1000 h under ambient conditions. Inorganic perovskite solar modules were also fabricated that exhibiting an efficiency of 11.0 % with a record area of 27 cm2 . This work confirms that using efficient dopant-free HTMs is an attractive strategy to stabilize inorganic PSCs for their future scale-up.
Collapse
Affiliation(s)
- Cheng Liu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBeijing102206P. R. China
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | - Cansu Igci
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | - Yi Yang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBeijing102206P. R. China
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | | | | | - Kasparas Rakstys
- Department of Organic ChemistryKaunas University of TechnologyKaunas50254Lithuania
| | - Hiroyuki Kanda
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | - Naoyuki Shibayama
- Department of Biomedical EngineeringToin University of Yokohama1614 Kurogane, AobaYokohamaJapan
| | - Bin Ding
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | - Xianfu Zhang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBeijing102206P. R. China
| | - Vygintas Jankauskas
- Department of Organic ChemistryKaunas University of TechnologyKaunas50254Lithuania
- Institute of Chemical PhysicsVilnius UniversitySauletekio al. 3Vilnius10257Lithuania
| | - Yong Ding
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBeijing102206P. R. China
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | - Songyuan Dai
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBeijing102206P. R. China
| | - Paul J. Dyson
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
| | - Mohammad Khaja Nazeeruddin
- Group for Molecular Engineering of Functional MaterialsInstitute of Chemical Sciences and EngineeringEPFL VALAIS1951SionSwitzerland
- Department of Materials Science and EngineeringCity University of Hong KongKowloonHong Kong
| |
Collapse
|
9
|
Liu C, Igci C, Yang Y, Syzgantseva OA, Syzgantseva MA, Rakstys K, Kanda H, Shibayama N, Ding B, Zhang X, Jankauskas V, Ding Y, Dai S, Dyson PJ, Nazeeruddin MK. Dopant‐Free Hole Transport Materials Afford Efficient and Stable Inorganic Perovskite Solar Cells and Modules. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107774] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Cheng Liu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 P. R. China
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Cansu Igci
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Yi Yang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 P. R. China
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Olga A. Syzgantseva
- Department of Chemistry Lomonosov Moscow State University Moscow 119991 Russia
| | | | - Kasparas Rakstys
- Department of Organic Chemistry Kaunas University of Technology Kaunas 50254 Lithuania
| | - Hiroyuki Kanda
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Naoyuki Shibayama
- Department of Biomedical Engineering Toin University of Yokohama 1614 Kurogane, Aoba Yokohama Japan
| | - Bin Ding
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Xianfu Zhang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 P. R. China
| | - Vygintas Jankauskas
- Department of Organic Chemistry Kaunas University of Technology Kaunas 50254 Lithuania
- Institute of Chemical Physics Vilnius University Sauletekio al. 3 Vilnius 10257 Lithuania
| | - Yong Ding
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 P. R. China
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Songyuan Dai
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 P. R. China
| | - Paul J. Dyson
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
| | - Mohammad Khaja Nazeeruddin
- Group for Molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering EPFL VALAIS 1951 Sion Switzerland
- Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong
| |
Collapse
|
10
|
Nakamura Y, Shibayama N, Sugimoto K. Visualization of halide perovskite crystal growth processes by in situ heating WAXS measurements. Chem Commun (Camb) 2021; 57:2685-2688. [PMID: 33595020 DOI: 10.1039/d0cc08325a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We observed the crystallization dynamics of halide perovskite crystals (CH3NH3PbI3) by in situ heating wide-angle X-ray scattering measurements. As a result, we revealed that crystal growth occurs during the conversion of complexes to perovskite crystals.
Collapse
Affiliation(s)
- Yuiga Nakamura
- Japan Synchrotron Radiation Research Institute/SPring-8, Kouto, Sayo, Hyogo 679-5198, Japan
| | - Naoyuki Shibayama
- Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan.
| | - Kunihisa Sugimoto
- Japan Synchrotron Radiation Research Institute/SPring-8, Kouto, Sayo, Hyogo 679-5198, Japan and Institute for Integrated Cell-MaterialSciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| |
Collapse
|
11
|
Xiao Y, Wang H, Awai F, Shibayama N, Kubo T, Segawa H. Eco-Friendly AgBiS 2 Nanocrystal/ZnO Nanowire Heterojunction Solar Cells with Enhanced Carrier Collection Efficiency. ACS Appl Mater Interfaces 2021; 13:3969-3978. [PMID: 33448786 DOI: 10.1021/acsami.0c19435] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
AgBiS2 nanocrystals (NCs) are nontoxic, lead-free, and near-infrared absorbing materials. Eco-friendly solar cells were constructed using interdigitated layers of ZnO nanowires (NWs) and AgBiS2 NCs, with the aim of elongating the otherwise short carrier diffusion length of the AgBiS2 NC assembly. AgBiS2 NCs were uniformly infiltrated into the ZnO NW layers using a low-cost and easily scalable dip coating method. The resulting ZnO NW/AgBiS2 NC interdigitated structures provided efficient carrier pathways in constructed nanowire solar cells (NWSCs), composed of a transparent electrode/ZnO NW/AgBiS2 NC interdigitated layer/P3HT hole transport layer/Au. The photocurrent external quantum efficiency (EQE) in the visible to near-infrared regions was enhanced compared to those of the control solar cells made with ZnO/AgBiS2 tandem layered structures. The maximum EQE for the NWSCs reached 82% in the visible region, which is higher than the EQE values previously reported for solar cells fabricated with ZnO/AgBiS2 NCs. Air stability tests on unsealed NWSCs demonstrated that 90% or more of the initial power conversion efficiency was maintained even after 6 months.
Collapse
Affiliation(s)
- Yun Xiao
- Research Center for Advanced Science and Technology, The University of Tokyo, 153-8904 Tokyo, Japan
- Graduate School of Engineering, The University of Tokyo, 153-8904 Tokyo, Japan
| | - Haibin Wang
- Research Center for Advanced Science and Technology, The University of Tokyo, 153-8904 Tokyo, Japan
| | - Fumiyasu Awai
- Graduate School of Arts and Sciences, The University of Tokyo, 153-8902 Tokyo, Japan
| | - Naoyuki Shibayama
- Graduate School of Arts and Sciences, The University of Tokyo, 153-8902 Tokyo, Japan
| | - Takaya Kubo
- Research Center for Advanced Science and Technology, The University of Tokyo, 153-8904 Tokyo, Japan
| | - Hiroshi Segawa
- Research Center for Advanced Science and Technology, The University of Tokyo, 153-8904 Tokyo, Japan
- Graduate School of Engineering, The University of Tokyo, 153-8904 Tokyo, Japan
- Graduate School of Arts and Sciences, The University of Tokyo, 153-8902 Tokyo, Japan
| |
Collapse
|
12
|
Shibayama N, Maekawa H, Nakamura Y, Haruyama Y, Niibe M, Ito S. Control of Molecular Orientation of Spiro-OMeTAD on Substrates. ACS Appl Mater Interfaces 2020; 12:50187-50191. [PMID: 33084297 DOI: 10.1021/acsami.0c15509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
2,2',7,7'-Tetrakis(N,N-di-p-methoxyphenylamino)-9,9'-spirobifluorene (spiro-OMeTAD) is utilized as a p-type semiconductor layer in perovskite solar cells and solid-state dye-sensitized solar cells. Spiro-OMeTAD has been known to have a spiro center, leading to a random orientation. Although the molecular orientation of organic semiconductor materials influences the conductivity, which is directly related to semiconductor device characteristics, the molecular orientation of spiro-OMeTAD has not been fully discussed. In this study, we prepared spiro-OMeTAD layers on various substrates and investigated their orientation by grazing-incidence wide-angle X-ray scattering (GIWAXS) and near-edge X-ray absorption fine structure (NEXAFS). Additionally, we demonstrated that the molecular orientation of spiro-OMeTAD could be controlled by changing their surface energies by changing the substrate materials. Consequently, we could improve the electrical conductivity by improving its molecular orientation. The results of this study provide a guideline for the preparation of organic semiconductor material layers using the wet-coating method.
Collapse
Affiliation(s)
- Naoyuki Shibayama
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, Himeji 671-2280, Japan
- Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, Megro, Tokyo 153-8902, Japan
| | - Hiroyuki Maekawa
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, Himeji 671-2280, Japan
| | - Yuiga Nakamura
- Japan Synchrotron Radiation Research Institute, Sayo-gun 679-5198, Hyogo, Japan
| | - Yuichi Haruyama
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, Himeji 671-2280, Japan
- Laboratory of Advanced Science and Technology for Industry, University of Hyogo, Ako, Hyogo 678-1205, Japan
| | - Masahito Niibe
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, Himeji 671-2280, Japan
- Laboratory of Advanced Science and Technology for Industry, University of Hyogo, Ako, Hyogo 678-1205, Japan
| | - Seigo Ito
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, Himeji 671-2280, Japan
| |
Collapse
|
13
|
Fukuzawa S, Fukuzawa S, Okino S, Ishiwaki H, Iwata Y, Kuroiwa N, Uchiyama T, Shibayama N. Cardiac amyloidosis in patients undergoing aortic valve replacement for aortic stenosis. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Transthyretin cardiac amyloidosis (ATTR) has been increasingly recognized in patients with degenerative aortic stenosis (AS). In some reports, the uptake of Tc-99m labeled bone radiotracers in cardiac amyloidosis has been documented. Tc-99m pyrophosphate (PYP) scintigraphy in the absence of evidence of a monoclonal gammopathy was diagnostic for transthyretin cardiac amyloidosis, providing a cost-effective and non-invasive technique with a specificity and positive predictive value of nearly 100%. We sought to determine the prevalence of ATTR as detected by the bone scan tracer among the patients with severe AS requiring surgical valve replacement.
Methods
We retrospectively analyzed clinical and echocardiographical data for 44 patients with severe AS requiring surgical valve replacement between Jan. 2009 and Dec. 2016. All eligible patients were offered Tc-99m PYP scintigraphy. Retention of Tc-99m PYP in the heart was assessed using both a semiquantitative visual score (range, 0 [no uptake] to 3 [uptake greater than bone]). Positive uptake was defined score 2 and 3.
Results
Myocardial deposition of Tc-99m PYP (Score 2–3) was identified in 4 of 44 patients (9%), all >70 years and 75% male. Patients with myocardial deposition of the tracer were older (78±8 years vs. 70±12 years), and had more mean interventricular septum thickness (18±3 mm vs. 14±5 mm). Both groups had at least ejection fraction and abnormal global longitudinal strain with no significant difference between groups. Pre-operative serum median NT-pro BNP level was similar between two groups, but post-operative improvement of NT-pro BNP was larger in non-deposition of the tracer group. During the post operative follow-up, survival was significantly worse if patients had amyloid deposition compared with no deposition subjects (25% vs. 7.5%).
Conclusion
Incidental transthyretin cardiac amyroidosis had a prevelance of 9% among patients undergoing surgical aortic valve replacement and was associated with a poor outcome.
Funding Acknowledgement
Type of funding source: None
Collapse
Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - H Ishiwaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Shibayama
- Funabashi Municipal Medical Center, Funabashi, Japan
| |
Collapse
|
14
|
Huckaba AJ, Garcia‐Benito I, Kanda H, Shibayama N, Oveisi E, Kinge S, Nazeeruddin MK. Inkjet‐Printed TiO
2
/Fullerene Composite Films for Planar Perovskite Solar Cells. Helv Chim Acta 2020. [DOI: 10.1002/hlca.202000044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aron J. Huckaba
- Institute of Chemical Sciences and Engineering, EPFL Valais-Wallis Rue de l'industrie 17 CH-1951 Sion Switzerland
- Department of ChemistryUniversity of Kentucky Lexington KY 40506 United States
| | - Inés Garcia‐Benito
- Institute of Chemical Sciences and Engineering, EPFL Valais-Wallis Rue de l'industrie 17 CH-1951 Sion Switzerland
| | - Hiroyuki Kanda
- Institute of Chemical Sciences and Engineering, EPFL Valais-Wallis Rue de l'industrie 17 CH-1951 Sion Switzerland
| | - Naoyuki Shibayama
- Department of General Systems StudiesGraduate School of Arts and SciencesThe University of Tokyo 3-8-1 Komaba Meguro-ku Tokyo 153-8902 Japan
| | - Emad Oveisi
- Interdisciplinary Centre for Electron Microscopy (CIME)EPFL, CH- 1015 Lausanne Switzerland
| | - Sachin Kinge
- Toyota Motor CorporationToyota Motor Technical CentreAdvanced Technology Div. Hoge Wei 33, B-1930 Zaventum Belgium
| | - Mohammad K. Nazeeruddin
- Institute of Chemical Sciences and Engineering, EPFL Valais-Wallis Rue de l'industrie 17 CH-1951 Sion Switzerland
| |
Collapse
|
15
|
Rakstys K, Paek S, Drevilkauskaite A, Kanda H, Daskeviciute S, Shibayama N, Daskeviciene M, Gruodis A, Kamarauskas E, Jankauskas V, Getautis V, Nazeeruddin MK. Carbazole-Terminated Isomeric Hole-Transporting Materials for Perovskite Solar Cells. ACS Appl Mater Interfaces 2020; 12:19710-19717. [PMID: 32242411 PMCID: PMC7467540 DOI: 10.1021/acsami.9b23495] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A set of novel hole-transporting materials (HTMs) based on π-extension through carbazole units was designed and synthesized via a facile synthetic procedure. The impact of isomeric structural linking on their optical, thermal, electrophysical, and photovoltaic properties was thoroughly investigated by combining the experimental and simulation methods. Ionization energies of HTMs were measured and found to be suitable for a triple-cation perovskite active layer ensuring efficient hole injection. New materials were successfully applied in perovskite solar cells, which yielded a promising efficiency of up to almost 18% under standard 100 mW cm-2 global AM1.5G illumination and showed a better stability tendency outperforming that of 2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene. This work provides guidance for the molecular design strategy of effective hole-conducting materials for perovskite photovoltaics and similar electronic devices.
Collapse
Affiliation(s)
- Kasparas Rakstys
- Department
of Organic Chemistry, Kaunas University
of Technology, Radvilenu
pl. 19, Kaunas 50254, Lithuania
| | - Sanghyun Paek
- Group
for Molecular Engineering of Functional Material, Institute of Chemical
Sciences and Engineering, École Polytechnique
Fédérale de Lausanne, Sion CH-1951, Switzerland
- Department
of Chemistry and Energy Engineering, Sangmyung
University, Seoul 03016, Republic of Korea
| | - Aida Drevilkauskaite
- Department
of Organic Chemistry, Kaunas University
of Technology, Radvilenu
pl. 19, Kaunas 50254, Lithuania
| | - Hiroyuki Kanda
- Group
for Molecular Engineering of Functional Material, Institute of Chemical
Sciences and Engineering, École Polytechnique
Fédérale de Lausanne, Sion CH-1951, Switzerland
| | - Sarune Daskeviciute
- Department
of Organic Chemistry, Kaunas University
of Technology, Radvilenu
pl. 19, Kaunas 50254, Lithuania
| | - Naoyuki Shibayama
- Department
of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Maryte Daskeviciene
- Department
of Organic Chemistry, Kaunas University
of Technology, Radvilenu
pl. 19, Kaunas 50254, Lithuania
| | - Alytis Gruodis
- Institute
of Chemical Physics Vilnius University, Sauletekio al. 3, Vilnius 10257, Lithuania
| | - Egidijus Kamarauskas
- Institute
of Chemical Physics Vilnius University, Sauletekio al. 3, Vilnius 10257, Lithuania
| | - Vygintas Jankauskas
- Institute
of Chemical Physics Vilnius University, Sauletekio al. 3, Vilnius 10257, Lithuania
| | - Vytautas Getautis
- Department
of Organic Chemistry, Kaunas University
of Technology, Radvilenu
pl. 19, Kaunas 50254, Lithuania
| | - Mohammad Khaja Nazeeruddin
- Group
for Molecular Engineering of Functional Material, Institute of Chemical
Sciences and Engineering, École Polytechnique
Fédérale de Lausanne, Sion CH-1951, Switzerland
| |
Collapse
|
16
|
Sanehira Y, Shibayama N, Numata Y, Ikegami M, Miyasaka T. Low-Temperature Synthesized Nb-Doped TiO 2 Electron Transport Layer Enabling High-Efficiency Perovskite Solar Cells by Band Alignment Tuning. ACS Appl Mater Interfaces 2020; 12:15175-15182. [PMID: 32149492 DOI: 10.1021/acsami.9b23485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An Nb-doped TiO2 (Nb-TiO2) film comprising a double structure stacked with a bottom compact layer and top mesoporous layers was synthesized by treating a Ti precursor-coated substrate using a one-step low-temperature steam-annealing (SA) method. The SA-based Nb-TiO2 films possess high crystallinity and conductivity, and that allows better control over the conduction band (CB) of TiO2 for the electron transport layer (ETL) of the perovskite solar cells by the Nb doping level. Optimization of power conversion efficiency (PCE) for the Nb-TiO2-based ETL was combined with the CB level tuning of the mixed-halide perovskite by changing the Br/I ratio. This band offset management enabled to establish the most suitable energy levels between the ETL and the perovskites. This method was applied to reduce the band gap of perovskites to enhance the photocurrent density while maintaining a high open-circuit voltage. As a result, the optimal combination of 5 mol % Nb-TiO2 ETL and 10 mol % Br in the mixed-halide perovskite exhibited high photovoltaic performance for low-temperature device fabrication, achieving a high-yield PCE of 21.3%.
Collapse
Affiliation(s)
- Yoshitaka Sanehira
- Graduate School of Engineering, Toin University of Yokohama, 1614 Kurogane-cho, Aoba, Yokohama, Kanagawa 225-8503, Japan
| | - Naoyuki Shibayama
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
| | - Youhei Numata
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
| | - Masashi Ikegami
- Graduate School of Engineering, Toin University of Yokohama, 1614 Kurogane-cho, Aoba, Yokohama, Kanagawa 225-8503, Japan
| | - Tsutomu Miyasaka
- Graduate School of Engineering, Toin University of Yokohama, 1614 Kurogane-cho, Aoba, Yokohama, Kanagawa 225-8503, Japan
| |
Collapse
|
17
|
Nakamura Y, Shibayama N, Hori A, Matsushita T, Segawa H, Kondo T. Crystal Systems and Lattice Parameters of CH3NH3Pb(I1–xBrx)3 Determined Using Single Crystals: Validity of Vegard’s Law. Inorg Chem 2020; 59:6709-6716. [DOI: 10.1021/acs.inorgchem.9b03421] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuiga Nakamura
- Department of Materials Engineering, The University of Tokyo, Tokyo, Japan
| | - Naoyuki Shibayama
- Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Akiko Hori
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
| | - Tomonori Matsushita
- Department of Materials Engineering, The University of Tokyo, Tokyo, Japan
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Hiroshi Segawa
- Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Takashi Kondo
- Department of Materials Engineering, The University of Tokyo, Tokyo, Japan
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| |
Collapse
|
18
|
Fukuzawa S, Okino S, Ishiwaki H, Iwata Y, Uchiyama T, Kuroiwa N, Oka M, Furihata S, Shibayama N, Inagaki M. P2725Transthyretin cardiac amyloidosis in heart failure with preserved ejection fraction: Imaging by Tc-99m bone scan. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.1042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Heart failure with preserved ejection fraction (HFpEF) is a heterogeneous clinical syndrome with multiple underlying causes. Transthyretin amyloidosis (ATTR) is an underdiagnosed cause of HFpEF. Extraosseous uptake, in particular, myocardial uptake, was observed in a number of ATTR patients examined with the bone scan tracers.
Objectives
We sought to determine the prevalence of ATTR as detected by the bone scan among the patients admitted due to HFpEF.
Methods
We screened all consecutive patients ≥60 years old admitted due to HFpEF (left ventricular ejection fraction ≥50%). All eligible patients were offered an echocardiogram and a bone scan (a 99mTc-DPD/MDP/HMDP scintigraphy). Echocardiographic and clinical variables were gathered in all the subjects. The intensity of the myocardial uptake was graded according to a visual scale ranging from 0 to 3 points, in which the absence of uptake was assigned a score of 0 points; uptake less than that of bone (referred to as the adjacent rib), 1 point; uptake similar to that of bone, 2 points; and uptake greater than that of bone, 3 points. The distribution of the uptake in myocardium was defined as focal uptake, diffuse uptake, uptake in a ventricular wall segment, diffuse ventricular uptake, or diffuse biventricular uptake.
Results
The study included 62 HFpEF patients (52% women, 73±9 years). The bone scintigraphic analysis revealed relatively intense myocardial uptake in 7 of 62 patients (11.2%). 7 patients had intense Tc-99m uptake (score of 2–3) in the cardiac region, showing deposition in both right and left ventricles in every case. Patients with amyloid deposition were older (78±6 vs. 70±12 years, p<0.05), had a lower systolic blood pressure (118±23 vs. 148±28 mmHg, p<0.05), and left ventricular ejection fraction (52±11 vs. 58±6%, p<0.05). Both groups had at least moderate left ventricular hypertrophy and abnormal global longitudinal strain with no significant difference between groups. In 6 all the cases, the final diagnosis of amyloidosis was based on the results of abdominal fat aspiration biopsy.
Conclusion
ATTR is an underdiagnosed disease that accounts for a significant number (11.2%) of HFpEF cases. These findings create an opportunity for further investigation in the targeted therapy of patients with HFpEF.
Collapse
Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - H Ishiwaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Oka
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Furihata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Shibayama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Inagaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| |
Collapse
|
19
|
Fukuzawa S, Okino S, Ishiwaki H, Iwata Y, Uchiyama T, Kuroiwa N, Oka M, Furuhata S, Shibayama N, Inagaki M. 29Cardiac amyloidosis revealed by bone scintigraphy in heart failure with preserved ejection fraction. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez142.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Fukuzawa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Okino
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - H Ishiwaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - Y Iwata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - T Uchiyama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Kuroiwa
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Oka
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - S Furuhata
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - N Shibayama
- Funabashi Municipal Medical Center, Funabashi, Japan
| | - M Inagaki
- Funabashi Municipal Medical Center, Funabashi, Japan
| |
Collapse
|
20
|
Kanda H, Shibayama N, Uzum A, Umeyama T, Imahori H, Ibi K, Ito S. Effect of Silicon Surface for Perovskite/Silicon Tandem Solar Cells: Flat or Textured? ACS Appl Mater Interfaces 2018; 10:35016-35024. [PMID: 30215502 DOI: 10.1021/acsami.8b08701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Perovskite and textured silicon solar cells were integrated into a tandem solar cell through a stacking method. To consider the effective structure of silicon solar cells for perovskite/silicon tandem solar cells, the optic and photovoltaic properties of textured and flat silicon surfaces were compared using mechanical-stacking-tandem of two- and four-terminal structures by perovskite layers on crystal silicon wafers. The reflectance of the texture silicon surface in the range of 750-1050 nm could be reduced more than that of the flat silicon surface (from 2.7 to 0.8%), which resulted in increases in average incident photon to current conversion efficiency values (from 83.0 to 88.0%) and current density (from 13.7 to 14.8 mA/cm2). Using the texture surface of silicon heterojunction (SHJ) solar cells, the significant conversion efficiency of 21.4% was achieved by four-terminal device, which was an increase of 2.4% from that of SHJ solar cells alone.
Collapse
Affiliation(s)
- Hiroyuki Kanda
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering , University of Hyogo , 2167 Shosha , Himeji 671-0121 , Hyogo , Japan
| | - Naoyuki Shibayama
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering , University of Hyogo , 2167 Shosha , Himeji 671-0121 , Hyogo , Japan
| | - Abdullah Uzum
- Department of Electrical and Electronics Engineering , Karadeniz Technical University , Trabzon 61080 , Turkey
| | | | | | - Koji Ibi
- Choshu Industry Co., Ltd. , 3740 Shin-Yamanoi , Sanyo-Onoda 757-0003 , Yamaguchi , Japan
| | - Seigo Ito
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering , University of Hyogo , 2167 Shosha , Himeji 671-0121 , Hyogo , Japan
| |
Collapse
|
21
|
Baranwal AK, Masutani H, Sugita H, Kanda H, Kanaya S, Shibayama N, Sanehira Y, Ikegami M, Numata Y, Yamada K, Miyasaka T, Umeyama T, Imahori H, Ito S. Lead-free perovskite solar cells using Sb and Bi-based A 3B 2X 9 and A 3BX 6 crystals with normal and inverse cell structures. Nano Converg 2017; 4:26. [PMID: 28989856 PMCID: PMC5608797 DOI: 10.1186/s40580-017-0120-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 09/17/2017] [Indexed: 05/17/2023]
Abstract
Research of CH3NH3PbI3 perovskite solar cells had significant attention as the candidate of new future energy. Due to the toxicity, however, lead (Pb) free photon harvesting layer should be discovered to replace the present CH3NH3PbI3 perovskite. In place of lead, we have tried antimony (Sb) and bismuth (Bi) with organic and metal monovalent cations (CH3NH3+, Ag+ and Cu+). Therefore, in this work, lead-free photo-absorber layers of (CH3NH3)3Bi2I9, (CH3NH3)3Sb2I9, (CH3NH3)3SbBiI9, Ag3BiI6, Ag3BiI3(SCN)3 and Cu3BiI6 were processed by solution deposition way to be solar cells. About the structure of solar cells, we have compared the normal (n-i-p: TiO2-perovskite-spiro OMeTAD) and inverted (p-i-n: NiO-perovskite-PCBM) structures. The normal (n-i-p)-structured solar cells performed better conversion efficiencies, basically. But, these environmental friendly photon absorber layers showed the uneven surface morphology with a particular grow pattern depend on the substrate (TiO2 or NiO). We have considered that the unevenness of surface morphology can deteriorate the photovoltaic performance and can hinder future prospect of these lead-free photon harvesting layers. However, we found new interesting finding about the progress of devices by the interface of NiO/Sb3+ and TiO2/Cu3BiI6, which should be addressed in the future study.
Collapse
Affiliation(s)
- Ajay Kumar Baranwal
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Hideaki Masutani
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Hidetaka Sugita
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Hiroyuki Kanda
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Shusaku Kanaya
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Naoyuki Shibayama
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Yoshitaka Sanehira
- Graduate School of Engineering, Toin University of Yokohama, Yokohama, Kanagawa 225-8503 Japan
| | - Masashi Ikegami
- Graduate School of Engineering, Toin University of Yokohama, Yokohama, Kanagawa 225-8503 Japan
| | - Youhei Numata
- Graduate School of Engineering, Toin University of Yokohama, Yokohama, Kanagawa 225-8503 Japan
| | - Kouji Yamada
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1, Izumi-Chou, Narashino-Shi, Chiba, 275-8575 Japan
| | - Tsutomu Miyasaka
- Graduate School of Engineering, Toin University of Yokohama, Yokohama, Kanagawa 225-8503 Japan
| | - Tomokazu Umeyama
- Department of Molecular Engineering, Graduate School of Engineering and Institute for Integrated Cell Materials Sciences (WPI-iCeMS), Kyoto University, Nishikyo-Ku, Kyoto, 615-8510 Japan
| | - Hiroshi Imahori
- Department of Molecular Engineering, Graduate School of Engineering and Institute for Integrated Cell Materials Sciences (WPI-iCeMS), Kyoto University, Nishikyo-Ku, Kyoto, 615-8510 Japan
| | - Seigo Ito
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| |
Collapse
|
22
|
Shibayama N, Kanda H, Yusa SI, Fukumoto S, Baranwal AK, Segawa H, Miyasaka T, Ito S. All-inorganic inverse perovskite solar cells using zinc oxide nanocolloids on spin coated perovskite layer. Nano Converg 2017; 4:18. [PMID: 28804699 PMCID: PMC5532399 DOI: 10.1186/s40580-017-0113-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/09/2017] [Indexed: 05/25/2023]
Abstract
We confirmed the influence of ZnO nanoparticle size and residual water on performance of all inorganic perovskite solar cells. By decreasing the size of the ZnO nanoparticles, the short-circuit current density (Jsc) and open circuit photovoltage (Voc) values are increased and the conversion efficiency is improved. Although the Voc value is not affected by the influence of residual water in the solution for preparing the ZnO layer, the Jsc value drops greatly. As a result, it was found that it is important to use the oxide nanoparticles with a small particle diameter and to reduce the water content in the oxide forming material in order to manufacture a highly efficient all inorganic perovskite solar cells.
Collapse
Affiliation(s)
- Naoyuki Shibayama
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Hiroyuki Kanda
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Shin-ichi Yusa
- Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Shota Fukumoto
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Ajay K. Baranwal
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Hiroshi Segawa
- Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904 Japan
| | - Tsutomu Miyasaka
- Graduate School of Engineering, Toin University of Yokohama, Yokohama, Kanagawa 225-8503 Japan
| | - Seigo Ito
- Department of Materials and Synchrotron Radiation Engineering, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| |
Collapse
|
23
|
Adachi Y, Ooyama Y, Shibayama N, Ohshita J. Dithienogermole-containing D–π–A–π–A Photosensitizers for Dye-sensitized Solar Cells. CHEM LETT 2017. [DOI: 10.1246/cl.161034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
24
|
Abstract
The internal resistance and quality of the interface in CZTS solar cells were investigated using electrochemical impedance spectroscopy.
Collapse
Affiliation(s)
| | - Yiwen Zhang
- Technical Research Institute
- Toppan Printing Co., Ltd
- Japan
| | - Tetsuo Satake
- Technical Research Institute
- Toppan Printing Co., Ltd
- Japan
| | - Mutsumi Sugiyama
- Department of Electrical Engineering
- Faculty of Science and Technology
- Tokyo University of Science
- Noda 278-8510
- Japan
| |
Collapse
|
25
|
Adachi Y, Ooyama Y, Shibayama N, Ohshita J. Synthesis of organic photosensitizers containing dithienogermole and thiadiazolo[3,4-c]pyridine units for dye-sensitized solar cells. Dalton Trans 2016; 45:13817-26. [DOI: 10.1039/c6dt02469f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three dithienogermole-containing dyes were prepared and applied to dye-sensitized solar cells.
Collapse
Affiliation(s)
- Yohei Adachi
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Yousuke Ooyama
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Naoyuki Shibayama
- Technical Research Institute
- Toppan Printing Co
- Ltd
- Saitama 345-8508
- Japan
| | - Joji Ohshita
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| |
Collapse
|
26
|
Shibayama N, Ozawa H, Ooyama Y, Arakawa H. Highly Efficient Cosensitized Plastic-Substrate Dye-Sensitized Solar Cells with Black Dye and Pyridine-Anchor Organic Dye. BCSJ 2015. [DOI: 10.1246/bcsj.20140344] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoyuki Shibayama
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
- Technical Research Institute, Toppan Printing Co., Ltd
| | - Hironobu Ozawa
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
| | - Yousuke Ooyama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University
| | - Hironori Arakawa
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
| |
Collapse
|
27
|
Ooyama Y, Uenaka K, Sato T, Shibayama N, Ohshita J. Effective co-sensitization using D–π–A dyes with a pyridyl group adsorbing at Brønsted acid sites and Lewis acid sites on a TiO2 surface for dye-sensitized solar cells. RSC Adv 2015. [DOI: 10.1039/c4ra14190c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effective and convenient co-sensitization method for DSSC have been newly developed by employing two kinds of D–π–A dyes with pyridyl group capable of adsorbing at the Brønsted acid sites and the Lewis acid sites on TiO2 surface.
Collapse
Affiliation(s)
- Yousuke Ooyama
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Koji Uenaka
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | - Takafumi Sato
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| | | | - Joji Ohshita
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima 739-8527
- Japan
| |
Collapse
|
28
|
Shibayama N, Inoue Y, Abe M, Kajiyama S, Ozawa H, Miura H, Arakawa H. Novel near-infrared carboxylated 1,3-indandione sensitizers for highly efficient flexible dye-sensitized solar cells. Chem Commun (Camb) 2015; 51:12795-8. [DOI: 10.1039/c5cc03049h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The novel near-infrared organic dyes were designed for use in plastic-substrate dye sensitized solar cells. As a result, η of 5.76% was achieved.
Collapse
Affiliation(s)
- Naoyuki Shibayama
- Department of Industrial Chemistry
- Faculty of Engineering
- Tokyo University of Science
- Shinjuku
- Japan
| | | | - Masahiro Abe
- Technical Research Institute
- Toppan Printing Co., Ltd
- Saitama 345-8508
- Japan
| | | | - Hironobu Ozawa
- Department of Industrial Chemistry
- Faculty of Engineering
- Tokyo University of Science
- Shinjuku
- Japan
| | | | - Hironori Arakawa
- Department of Industrial Chemistry
- Faculty of Engineering
- Tokyo University of Science
- Shinjuku
- Japan
| |
Collapse
|
29
|
Shibayama N, Ozawa H, Abe M, Ooyama Y, Arakawa H. A new cosensitization method using the Lewis acid sites of a TiO2 photoelectrode for dye-sensitized solar cells. Chem Commun (Camb) 2014; 50:6398-401. [DOI: 10.1039/c3cc49461f] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dye-sensitized solar cells co-sensitized with black dye and a pyridine-anchor dye showing site-selective adsorption behaviour at the TiO2 surface have been prepared for the first time to reduce competitive adsorption.
Collapse
Affiliation(s)
- Naoyuki Shibayama
- Department of Industrial Chemistry
- Faculty of Engineering
- Tokyo University of Science
- Shinjuku, Japan
- Technical Research Institute
| | - Hironobu Ozawa
- Department of Industrial Chemistry
- Faculty of Engineering
- Tokyo University of Science
- Shinjuku, Japan
| | - Masahiro Abe
- Technical Research Institute
- Toppan Printing Co., Ltd
- Sugito, Japan
| | - Yousuke Ooyama
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima, Japan
| | - Hironori Arakawa
- Department of Industrial Chemistry
- Faculty of Engineering
- Tokyo University of Science
- Shinjuku, Japan
| |
Collapse
|
30
|
Kovalevsky AY, Chatake T, Shibayama N, Park SY, Ishikawa T, Mustyakimov M, Fisher SZ, Langan P, Morimoto Y. Preliminary time-of-flight neutron diffraction study of human deoxyhemoglobin. Acta Crystallogr Sect F Struct Biol Cryst Commun 2008; 64:270-3. [PMID: 18391424 PMCID: PMC2374244 DOI: 10.1107/s1744309108005137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2008] [Accepted: 02/22/2008] [Indexed: 11/10/2022]
Abstract
Human hemoglobin (HbA) is an intricate system that has evolved to efficiently transport oxygen molecules (O(2)) from lung to tissue. Its quaternary structure can fluctuate between two conformations, T (tense or deoxy) and R (relaxed or oxy), which have low and high affinity for O(2), respectively. The binding of O(2) to the heme sites of HbA is regulated by protons and by inorganic anions. In order to investigate the role of the protonation states of protein residues in O(2) binding, large crystals of deoxy HbA (approximately 20 mm(3)) were grown in D(2)O under anaerobic conditions for neutron diffraction studies. A time-of-flight neutron data set was collected to 1.8 A resolution on the Protein Crystallography Station (PCS) at the spallation source run by Los Alamos Neutron Science Center (LANSCE). The HbA tetramer (64.6 kDa; 574 residues excluding the four heme groups) occupies the largest asymmetric unit (space group P2(1)) from which a high-resolution neutron data set has been collected to date.
Collapse
Affiliation(s)
- A. Y. Kovalevsky
- Bioscience Division, MS M888, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - T. Chatake
- Kyoto University, Research Reactor Institute, Kumatori, Osaka 590-0494, Japan
| | - N. Shibayama
- Jichi Medical University, Department of Physiology, Shimotsuke, Tochigi 329-0498, Japan
| | - S.-Y. Park
- Yokohama City University, Graduate School of Integrated Science, Tsurumi, Yokohama 230-0045, Japan
| | - T. Ishikawa
- Kyoto University, Research Reactor Institute, Kumatori, Osaka 590-0494, Japan
| | - M. Mustyakimov
- Bioscience Division, MS M888, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - S. Z. Fisher
- Bioscience Division, MS M888, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - P. Langan
- Bioscience Division, MS M888, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
- Department of Chemistry, University of Toledo, Toledo, OH 53606, USA
| | - Y. Morimoto
- Kyoto University, Research Reactor Institute, Kumatori, Osaka 590-0494, Japan
| |
Collapse
|
31
|
Matsubara K, Fukaya T, Miwa K, Shibayama N, Nigami H, Harigaya H, Nozaki H, Hirata T, Baba K, Suzuki T, Ishiguro A. Development of serum IgM antibodies against superantigens of Staphylococcus aureus and Streptococcus pyogenes in Kawasaki disease. Clin Exp Immunol 2006; 143:427-34. [PMID: 16487241 PMCID: PMC1809617 DOI: 10.1111/j.1365-2249.2006.03015.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
To serologically determine the association of microbial superantigens and the pathogenesis of Kawasaki disease (KD), we conducted a case-control study. Serum IgG and IgM antibodies against staphylococcal enterotoxin A (SEA), SEB, SEC, toxic shock syndrome toxin-1 (TSST-1), and streptococcal pyrogenic exotoxin A (SPEA) were measured by an enzyme-linked immunosorbent assay in 293 serum samples from 65 KD patients on clinical days 1-28 and 120 control samples. The administration of immunoglobulin products, which contain high concentrations of IgG antibodies against all the superantigens, directly elevated antitoxin IgG antibodies in KD patients. In contrast, antitoxin IgM antibodies were not detected in immunoglobulin products. Actually, we found a significant elevation of IgM antibodies against SEA in KD patients in the first (median titre: 0.020, P < 0.01 versus control), second (0.024, P < 0.001), third (0.030, P < 0.001) and fourth (0.038, P < 0.001) weeks, compared to the controls (0.015). Significant differences of IgM antibodies were also true for SEB, TSST-1, and SPEA throughout the first to fourth weeks, and for SEC throughout the second to fourth weeks. The prevalence of KD patients having high IgM titres (> mean + 2SD of control values) to the 5 superantigens was increased with the clinical weeks, and reached 29-43% of KD subjects at the fourth week. This is the first study that describes kinetics of IgM antibodies against superantigens and clarifies the serological significance throughout the clinical course of KD. Our results suggest that multiple superantigens involve in the pathogenesis of KD.
Collapse
Affiliation(s)
- K Matsubara
- Department of Paediatrics, Nishi-Kobe Medical Centre, 5-7-1 Kojidai, Nishi-ku, Kobe 651-2273, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Abstract
The main features of cooperative oxygenation of human hemoglobin have been described by assuming the equilibrium between two affinity conformations of the entire molecule, T and R. However, the molecular basis for explaining the wide variation in the O(2) affinities of the deoxy T state has remained obscure. We address this long-standing issue by trapping the conformational states of deoxyhemoglobin molecules within wet porous transparent silicate sol-gels. The equilibrium O(2) binding measurements of the encapsulated deoxyhemoglobin samples showed that deoxyhemoglobin free of anions coexists in two conformations that differ in O(2) affinity by 40 times or more, and addition of inositol hexaphosphate to this anion-free deoxyhemoglobin brings about a very slow redistribution of these affinity conformations. These results are the first, direct demonstration of the existence of equilibrium between two (at least two) functionally distinguishable conformational states in the T state deoxyhemoglobin.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Yakushiji 3311-1, Minamikawachi, Kawachi, Tochigi 329-0498, Japan.
| | | |
Collapse
|
33
|
Kanaori K, Shibayama N, Gohda K, Tajima K, Makino K. Multiple four-stranded conformations of human telomere sequence d(CCCTAA) in solution. Nucleic Acids Res 2001; 29:831-40. [PMID: 11160907 PMCID: PMC30397 DOI: 10.1093/nar/29.3.831] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
By detailed NMR analysis of a human telomere repeating unit, d(CCCTAA), we have found that three distinct tetramers, each of which consists of four symmetric single-strands, slowly exchange in a slightly acidic solution. Our new finding is a novel i-motif topology (T:-form) where T4 is intercalated between C1 and C2 of the other duplex. The other two tetramers have a topology where C1 is intercalated between C2 and C3 of the other parallel duplex, resulting in the non-stacking T4 residues (R-form), and a topology where C1 is stacked between C3 and T4 of the other duplex (S:-form). From the NMR denaturation profile, the R-form is the most stable of the three structures in the temperature range of 15-50 degrees C, the S:-form the second and the T:-form the least stable. The thermodynamic parameters indicate that the T-form is the most enthalpically driven and entropically opposed, and its population is increased with decreasing temperature. The T-form structure determined by restrained molecular dynamics calculation suggests that inter-strand van der Waals contacts in the narrow grooves should contribute to the enthalpic stabilization of the T-form.
Collapse
Affiliation(s)
- K Kanaori
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | | | | | | | | |
Collapse
|
34
|
Miyazaki G, Morimoto H, Yun KM, Park SY, Nakagawa A, Minagawa H, Shibayama N. Magnesium(II) and zinc(II)-protoporphyrin IX's stabilize the lowest oxygen affinity state of human hemoglobin even more strongly than deoxyheme. J Mol Biol 1999; 292:1121-36. [PMID: 10512707 DOI: 10.1006/jmbi.1999.3124] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Studies of oxygen equilibrium properties of Mg(II)-Fe(II) and Zn(II)-Fe(II) hybrid hemoglobins (i.e. alpha2(Fe)beta2(M) and alpha2(M)beta2(Fe); M=Mg(II), Zn(II) (neither of these closed-shell metal ions binds oxygen or carbon monoxide)) are reported along with the X-ray crystal structures of alpha2(Fe)beta2(Mg) with and without CO bound. We found that Mg(II)-Fe(II) hybrids resemble Zn(II)-Fe(II) hybrids very closely in oxygen equilibrium properties. The Fe(II)-subunits in these hybrids bind oxygen with very low affinities, and the effect of allosteric effectors, such as proton and/or inositol hexaphosphate, is relatively small. We also found a striking similarity in spectrophotometric properties between Mg(II)-Fe(II) and Zn(II)-Fe(II) hybrids, particularly, the large spectral changes that occur specifically in the metal-containing beta subunits upon the R-T transition of the hybrids. In crystals, both alpha2(Fe)beta2(Mg) and alpha2(Fe-CO)beta2(Mg) adopt the quaternary structure of deoxyhemoglobin. These results, combined with the re-evaluation of the oxygen equilibrium properties of normal hemoglobin, low-affinity mutants, and metal substituted hybrids, point to a general tendency of human hemoglobin that when the association equilibrium constant of hemoglobin for the first binding oxygen molecule (K1) approaches 0.004 mmHg(-1), the cooperativity as well as the effect of allosteric effectors is virtually abolished. This is indicative of the existence of a distinct thermodynamic state which determines the lowest oxygen affinity of human hemoglobin. Moreover, excellent agreement between the reported oxygen affinity of deoxyhemoglobin in crystals and the lowest affinity in solution leads us to propose that the classical T structure of deoxyhemoglobin in the crystals represents the lowest affinity state in solution. We also survey the oxygen equilibrium properties of various metal-substituted hybrid hemoglobins studied over the past 20 years in our laboratory. The bulk of these data are consistent with the Perutz's trigger mechanism, in that the affinity of a metal hybrid is determined by the ionic radius of the metal, and also by the steric effect of the distal ligand, if present. However, there remains a fundamental contradiction among the oxygen equilibrium properties of the beta substituted hybrid hemoglobins.
Collapse
Affiliation(s)
- G Miyazaki
- Division of Biophysical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
| | | | | | | | | | | | | |
Collapse
|
35
|
Abstract
A controversy still exists over whether the molecular basis of hemoglobin cooperativity can be more appropriately explained by one of two classic allosteric models, the concerted and sequential models. To distinguish these two models from the viewpoint of their fundamental processes, namely, the presence or absence of conformational equilibria, we have trapped the conformations of nickel(II)-iron(II) hybrid hemoglobin molecules with two CO-bound, alpha2(Fe-CO)beta2(Ni) and alpha2(Ni)beta2(Fe-CO), by encapsulation in the water-filled pores of sol-gel-derived transparent silica-gels. In our experimental system, nickel(II) protoporphyrin binds neither O2 nor CO and mimics a fixed deoxyheme, and the gel matrix provides a means of inhibiting large-scale protein structural changes, thus enabling O2 equilibrium study of the hybrids still in their doubly liganded conformations. Results showed that two conformations of widely different O2 affinity exist together in each doubly liganded hemoglobin, providing a direct proof of the concerted mechanism versus the sequential mechanism.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Yakushiji 3311-1 Minamikawachi, Kawachi, Tochigi, 329-0498, Japan.
| |
Collapse
|
36
|
Unzai S, Eich R, Shibayama N, Olson JS, Morimoto H. Rate constants for O2 and CO binding to the alpha and beta subunits within the R and T states of human hemoglobin. J Biol Chem 1998; 273:23150-9. [PMID: 9722544 DOI: 10.1074/jbc.273.36.23150] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Despite a large amount of work over the past 30 years, there is still no universal agreement on the differential reactivities of the individual alpha and beta subunits in human hemoglobin. To address this question systematically, we prepared a series of hybrid hemoglobins in which heme was replaced by chromium(III), manganese(III), nickel(II), and magnesium(II) protoporphyrin IXs in either the alpha or beta subunits to produce alpha2(M)beta2(Fe)1 and alpha2(Fe)beta2(M) tetramers. None of the abnormal metal complexes react with dioxygen or carbon monoxide. The O2 affinities of the resultant hemoglobins vary from 3 microM-1 (Cr(III)/Fe(II) hybrids) to 0.003 microM-1 (Mg(II)/Fe(II) hybrids), covering the full range expected for the various high (R) and low (T) affinity quaternary conformations, respectively, of human hemoglobin A0. The alpha and beta subunits in hemoglobin have similar O2 affinities in both quaternary states, despite the fact that the R to T transition causes significantly different structural changes in the alpha and beta heme pockets. This functional equivalence almost certainly evolved to maintain high n values for efficient O2 transport.
Collapse
Affiliation(s)
- S Unzai
- Department of Biophysical Engineering, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan
| | | | | | | | | |
Collapse
|
37
|
Shibayama N, Morimoto H, Saigo S. Asymmetric cyanomet valency hybrid hemoglobin, (alpha+CN-beta+CN-)(alpha beta): the issue of valency exchange. Biochemistry 1998; 37:6221-8. [PMID: 9572835 DOI: 10.1021/bi980134d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A new framework for hemoglobin cooperativity was proposed by Ackers and colleagues on the basis of the hyper thermodynamic stability and deoxy (T) quaternary structure of one of diliganded deoxy-cyanomet hybrid hemoglobins, (alpha+CN-beta+CN-)(alpha beta), studied by hybridization of the equimolar mixture of deoxyhemoglobin and cyanomethemoglobin through a long (70-100 h) dimer exchange reaction [Daugherty et al. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 1110-1114]. Recently, we reported that the published hyperstability of (alpha+CN-beta+CN-)(alpha beta) is incorrect due to the occurrence of valency exchange between the heme sites of both parental hemoglobins during the long deoxy incubation [Shibayama et al. (1997) Biochemistry 36, 4375-4381]. We also noted a difficulty in maintaining both anaerobicity and excess free cyanide of the sample during the long incubation, which led to formation of cyanide-unbound aqometheme in the original deoxyhemoglobin resulting from the electron transfer to cyanometheme. This paper is a response to a recent argument against our work [Ackers et al. (1997) Biochemistry 36, 10822-10829]. Ackers et al. have claimed that no appreciable formation of aqomethemoglobin with their methods ensures their sample integrity, based on a supposition that our observed valency exchange may have occurred via aqometheme. In this paper, however, we demonstrate that appreciable (>27%) valency exchange really occurs between deoxy and cyanometheme sites during 72 h incubation under conditions where both anaerobicity and excess free cyanide of the sample solution are maintained by a continuous flow of humidified N2 with HCN. This confirms our view that previous experimental data on (alpha+CN-beta+CN-)(alpha beta) obtained by the long incubations should be subject to reexamination while our earlier estimation of a lower limit of free energy of (alpha+CN-beta+CN-)(alpha beta) (i.e., >/= -10.1 kcal/mol) by a rapid method (35 min) is still valid. We also suggest a possibility that the T quaternary structure of (alpha+CN-beta+CN-)(alpha beta) assigned by Ackers and colleagues using the long incubations is an artifact arising from the valency exchange. These results suggest that the putative mechanistic picture for hemoglobin cooperativity inferred from studies on deoxy-cyanomet hybrids is without foundation.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Minamikawachi, Tochigi 329-04, Japan.
| | | | | |
Collapse
|
38
|
Shibayama N, Morimoto H, Saigo S. Reexamination of the hyper thermodynamic stability of asymmetric cyanomet valency hybrid hemoglobin, (alpha+CN-beta+CN-)(alpha beta): no preferentially populating asymmetric hybrid at equilibrium. Biochemistry 1997; 36:4375-81. [PMID: 9109643 DOI: 10.1021/bi970009m] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
It has been reported that hybridization of the equimolar mixture of cyanomethemoglobin and deoxyhemoglobin through dimer exchange reaction results in establishment of an approximately binomial (1:2:1) equilibrium distribution of these parental hemoglobins and their hybrid molecule, (alpha+CN-beta+CN-)(alpha beta), within several days under anaerobic conditions at pH 7.4, 21.5 degrees C, leading to a hyper (i.e., about 170 times) thermodynamic stability of (alpha+CN-beta+CN-)(alpha beta) relative to the stability of the other diliganded species at pH 7.4, 21.5 degrees C [Daugherty, M. A., Shea, M. A., Johnson, J. A., LiCata, V. J., Turner, G. J., & Ackers, G. K. (1991) Proc. Natl. Acad. Sci. U.S.A. 88, 1110-1114]. To examine whether the published "binomiality" for this deoxy-cyanomet hybrid system really reflects the thermodynamic stability of (alpha+CN-beta+CN-)(alpha beta), we used a binomial (1:2:1) equilibrium distribution of the equimolar mixture of cyanomethemoglobin and fully oxygenated hemoglobin as a starting condition, and then this system was rapidly deoxygenated. We found that the relative population of the hybrid was reduced to 8.6% of the total upon deoxygenation. It was also found that the hybridization experiment under anaerobic conditions was not allowed to continue for a long time due to a valency exchange reaction between deoxy and cyanomet derivatives. For instance, a 48 h incubation resulted in the oxidation of 44% of Fe2+ to Fe3+ hemes in the original deoxyhemoglobin and the reduction of 42% of Fe3+ to Fe2+ hemes in the original cyanomethemoglobin. These results suggest that a real distribution of the deoxy-cyanomet hybrid system at equilibrium is fairly far from 1:2:1 (binomial distribution), and the thermodynamic stability of (alpha+CN-beta+CN-)(alpha beta) is less than one-tenth of the hyperstability previously reported. In addition, most of the previous results on deoxy-cyanomet valency hybrids placed under long anaerobic conditions should be subject to reexamination due to possible valency exchange reactions.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Minamikawachi, Tochigi, Japan
| | | | | |
Collapse
|
39
|
Kashiwagi Y, Yanagisawa Y, Shibayama N, Nakahara K, Kurashima F, Anzai J, Osa T. Preparative, electroenzymatic reduction of ketones on an all components-immobilized graphite felt electrode. Electrochim Acta 1997. [DOI: 10.1016/s0013-4686(97)85509-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
40
|
Abstract
Cr(III)-Fe(II) hybrid hemoglobins, alpha 2(Cr) beta 2(Fe) and alpha 2(Fe) beta 2(Cr), in which hemes in either the alpha- or beta-subunits were substituted with chromium(III) protoporphyrin IX (Cr(III)(PPIX), were prepared and characterized by oxygen equilibrium measurements. Because Cr(III)PPIX binds neither oxygen molecules nor carbon monoxide, the oxygen equilibrium properties of Fe(II) subunits within these hybrids can be analyzed by a two-step oxygen equilibrium scheme. The oxygen equilibrium constants for both hybrids at the second oxygenation step agree with those for human adult hemoglobin at the last oxygenation step (at pH 6.5-8.4 with an without inositol hexaphosphate at 25 degrees C). The similarity between the effects of the Cr(III)PPIX and each subunits' oxygeme on the oxygen equilibrium properties of the counterpart Fe(II) subunits within hemoglobin indicate the utility of Cr(III)PPIX as a model for a permanently oxygenated heme within the hemoglobin molecule. We found that Cr(III)-Fe(II) hybrid hemoglobins have several advantages over cyanomet valency hybrid hemoglobins, which have been frequently used as a model system for partially oxygenated hemoglobins. In contrast to cyanomet heme, Cr(III)PPIX within hemoglobin is not subject to reduction with dithionite or enzymatic reduction systems. Therefore, we could obtain more accurate and reasonable oxygen equilibrium curves of Cr(III)-Fe(II) hybrids in the presence of an enzymatic reduction system, and we could obtain single crystals of deoxy-alpha 2(Cr) beta 2(Fe) when grown in low salt solution in the presence of polyethylene glycol 1000 and 50 mM dithionite.
Collapse
Affiliation(s)
- S Unzai
- Department of Biophysical Engineering, Faculty of Engineering Science, Osaka University, Japan
| | | | | | | | | |
Collapse
|
41
|
Abstract
The geminate and bimolecular binding of CO, O2 and NO to [alpha-Ni(II)]2-[beta-Fe(II)]2 and [alpha-Fe(II)]2-[beta-Ni(II)2] hybrid hemoglobins has been studied. Biomolecular reactions: At pH 6.6 and 20 degrees both hybrids bind CO at 0.15 x 10(6) M-1 s-1. Reactions with oxygen: At pH 6.6 the on rates are 4.8 and 7.5 x 10(6) M-1 S-1 for alpha- and beta-hybrids, respectively; the off rate is approximately 2 x 10(3) S-1 for both. At pH 8 the alpha-Fe shows cooperativity whereas the beta-hybrid does not. Nanosecond geminate reactions: Faster bimolecular rates correlate with larger geminate amplitudes; thus alpha-Fe hybrids have larger amplitudes, and O2 geminate amplitudes are larger than those with CO. At pH 8.50% of O2 recombines with the alpha-hybrid. With NO, nanosecond geminate recombination is observable only with the beta-hybrid. Picosecond reactions: alpha-Hybrids show picosecond recombination of O2. With NO, alpha-hybrids recombine at 30 ns-1, beta-hybrids at 0.3 ns-1. The NO picosecond rates correlate with the molecular dynamics which shows ligands leaving the beta-Fe atom early and regularly, but remaining near the alpha-Fe atom. The results may be explained by assuming an interaction between the alpha-subunits giving rise to a high-affinity faster-reacting form, whereas the beta-subunits only become fast-reacting when an R-T conformation change analogous to that of hemoglobin A takes place. A third allosteric state is postulated to explain the results.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Tochigi-Ken, Japan
| | | | | | | |
Collapse
|
42
|
Shibayama N, Ikeda-Saito M, Hori H, Itaroku K, Morimoto H, Saigo S. Oxygen equilibrium and electron paramagnetic resonance studies on copper(II)-iron(II) hybrid hemoglobins at room temperature. FEBS Lett 1995; 372:126-30. [PMID: 7556632 DOI: 10.1016/0014-5793(95)00965-c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Copper(II)-iron(II) hybrid hemoglobins, in which hemes in either the alpha or beta subunits are substituted with copper(II) protoporphyrin IX, have been prepared. The affinities of the ferrous-subunits in both hybrids for the first binding oxygen are as low as the affinity of deoxyhemoglobin under various solution conditions, indicating the equality of behavior in copper(II) protoporphyrin IX and deoxyheme. Electron paramagnetic resonance (EPR) examinations on these hybrids at room temperature show that the interaction between copper(II) and the proximal histidine (F8) is specifically weakened in the alpha subunits within a low affinity conformation of hemoglobin. These results suggest that copper(II) protoporphyrin IX is a useful EPR probe at room temperature for investigating the deoxyheme environment in hemoglobin.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Tochigi, Japan
| | | | | | | | | | | |
Collapse
|
43
|
Abstract
We have used the sol-gel method to encapsulate oxy- and deoxy haemoglobins in transparent wet porous silica gels and fixed their original functional states with the retention of the reversible oxygenation properties as well as the intact spectroscopic properties. Haemoglobin originally encapsulated in aerobic gel binds oxygen non-cooperatively with very high affinity, corresponding to that for the last oxygen molecule binding to haemoglobin in solution. In contrast, haemoglobin originally encapsulated in anaerobic gel binds oxygen non-cooperatively with very low affinity, comparable to that for the first oxygen molecule binding to haemoglobin in solution. Furthermore, a detailed comparison of visible absorption spectra of deoxygenated haemoglobins originally encapsulated in aerobic and anaerobic gels indicates the retention of their original quaternary structures during the oxygenation or deoxygenation process. These results demonstrate that oxygen affinities of oxy- and deoxyhaemoglobins in solution can be satisfactorily fixed by encapsulation in wet porous silica gels, which presumably prevents the changes in the quaternary structures of haemoglobin. In addition, these results suggest a new capability of the sol-gel method to control the structural states of a variety of proteins, and further open up a new area of investigation of protein structure-function relationships.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Tochigi, Japan
| | | |
Collapse
|
44
|
Shibayama N, Imai K, Morimoto H, Saigo S. Oxygen equilibrium properties of nickel(II)-iron(II) hybrid hemoglobins cross-linked between 82 beta 1 and 82 beta 2 lysyl residues by bis(3,5-dibromosalicyl)fumarate: determination of the first two-step microscopic Adair constants for human hemoglobin. Biochemistry 1995; 34:4773-80. [PMID: 7718584 DOI: 10.1021/bi00014a035] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We have previously reported that cross-linked asymmetric Ni(II)-Fe(II) hybrid hemoglobin, XL[alpha (Fe) beta (Fe)][alpha (Ni) beta (Ni)], in which the alpha 1 beta 1 dimer containing ferrous protoporphyrin IX and the adjacent alpha 2 beta 2 dimer containing nickel(II) protoporphyrin IX were cross-linked between Lys-82 beta 1 and Lys-82 beta 2 by reaction with bis(3,5-dibromosalicyl)fumarate, represents an adequate model for determination of the alpha 1 beta 1 oxygenation properties of native hemoglobin [Shibayama, N., Imai, K., Morimoto, H., & Saigo, S. (1993) Biochemistry 32, 8792-8798]. To extend the approach using cross-linked Ni(II)-Fe(II) hybrids to all possible pathways for initial-half oxygenation of hemoglobin, we have prepared three other types of cross-linked Ni(II)-Fe(II) hybrids, carrying nickel(II) protoporphyrin IX in two subunits and ferrous protoporphyrin IX in the other two subunits, and have determined the two-step oxygen equilibrium curves of the ferrous subunits within these cross-linked hybrids. For the first step of oxygenation, the alpha subunit shows about 3-fold higher affinity than the beta subunit at all pH values examined, indicative of a significant functional heterogeneity of the subunits in deoxyhemoglobin. For the second step of oxygenation, the cooperativity represented by the Hill coefficient (nmax) increases in the order of beta 1 beta 2 (nmax = 1.36), alpha 1 beta 1 (nmax = 1.41), alpha 1 beta 2 (nmax = 1.64), and alpha 1 alpha 2 (nmax = 1.72) at pH 7.4 in the presence of 0.1 M Cl- at 25 degrees C.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Tochigi, Japan
| | | | | | | |
Collapse
|
45
|
Saigo S, Hashimoto H, Shibayama N, Nomura M, Nagamura T. X-ray absorption spectroscopic studies of a transient intermediate in the reaction of cyanide metmyoglobin with dithionite by using rapid freezing. Biochim Biophys Acta 1993; 1202:99-106. [PMID: 8373831 DOI: 10.1016/0167-4838(93)90069-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The reaction of cyanide metmyoglobin (Mb+CN-) with dithionite produces a transient intermediate, supposed to be cyanide-ligated ferrous myoglobin. The Fe K-edge X-ray absorption spectrum of the intermediate has been measured by using rapid freezing and compared with those of Mb+CN- and deoxymyoglobin (deoxyMb). The shapes of the XANES (X-ray Absorption Near Edge Structure) spectra of Mb+CN- and the intermediate are very similar, including the intensity ratios of the peak C1 to D. This indicates that CN- remains bound with a linear Fe-C-N configuration in the intermediate. The absorption edge of the intermediate is shifted to 1.2 eV lower energy than that of Mb+CN-, reflecting a valence change in the heme iron. The EXAFS (Extended X-ray Absorption Fine Structure) spectrum of the intermediate closely resembles that of Mb+CN- but significantly differs from that of deoxyMb. Analysis shows that the average iron-nearest neighbor atom distance is 1.99 +/- 0.01 A for both Mb+CN- and the intermediate and 2.05 +/- 0.01 A for deoxyMb. These results imply that the local structure around the heme iron of Mb+CN- does not change upon reduction until the cyanide ligand is released.
Collapse
Affiliation(s)
- S Saigo
- Department of Physics, Jichi Medical School, Tochigi, Japan
| | | | | | | | | |
Collapse
|
46
|
Abstract
Asymmetric Ni(II)-Fe(II) hybrid hemoglobin, XL[alpha(Fe)beta(Fe)][alpha(Ni)beta(Ni)], in which the alpha 1 beta 1 dimer containing ferrous protoporphyrin IX and the complementary alpha 2 beta 2 dimer containing Ni(II) protoporphyrin IX were cross-linked between Lys-82 beta 1 and Lys-82 beta 2 by reaction with bis(3,5-dibromosalicyl) fumarate, was synthesized and characterized. We have previously shown that (i) Ni(II) protoporphyrin IX, which binds neither oxygen nor carbon monoxide, mimics a fixed deoxyheme with respect to its effect on the oxygen equilibrium properties of the counterpart iron subunits in both symmetric Ni(II)-Fe(II) hybrid Hbs [Shibayama, N., Morimoto, H., & Miyazaki, G. (1986) J. Mol. Biol. 192, 323-329] and (ii) the cross-linking used in this study little affects the oxygen equilibrium properties of hemoglobin [Shibayama, N., Imai, K., Hirata, H., Hiraiwa, H., Morimoto, H., & Saigo, S. (1991) Biochemistry 30, 8158-8165]. These remarkable features of our model allowed us to measure the oxygen equilibrium curves for the first two steps of oxygen binding to the alpha 1 beta 1 dimer within the hemoglobin tetramer. At all pH values examined, the affinities of this asymmetric hybrid for the first oxygen molecule are as low as those of native hemoglobin. The hybrid did not show cooperative oxygen binding at pH 6.4, while significant cooperativity was observed with rising pH; i.e., the Hill coefficient was increased from 1.41 to 1.53 upon a pH change from 7.4 to 8.4. The electronic absorption spectrum of Ni(II) protoporphyrin IX in the alpha 2 subunit was changed upon carbon monoxide (or oxygen) binding to the alpha 1 beta 1 dimer.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Tochigi, Japan
| | | | | | | |
Collapse
|
47
|
Abstract
Polymerization of half-liganded Hb S was investigated using Ni(II)-Fe(II) hybrid Hb S, in which heme in either alpha or beta s subunits is replaced by Ni (II) protoporphyrin IX. Studies on the polymerization of these hybrid hemoglobins were carried out under aerobic conditions. Both alpha 2 (Ni) beta 2s (Fe-CO) and alpha 2 (Fe-CO) beta 2s (Ni) polymerized with a distinct delay time as do native deoxy-Hb S and Ni(II) Hb S. However, the critical concentration for polymerization of half-liganded Hb S, alpha 2 (Ni) beta 2s (Fe-CO) and alpha 2 (Fe-CO) beta 2s (Ni), was 4- and 8-times higher, respectively, than that of Ni(II)-Hb S. Kinetics of polymerization of both deoxygenated hybrid hemoglobins with CO completely removed were the same, although the critical concentrations for polymerization were intermediate between those for deoxy-Hb S and Ni(II)-Hb S. These results suggest that the small tertiary conformational change associated with the doubly liganded state may be much less favorable to polymerization than the completely unliganded state of Hb S. The conformational change depends on whether alpha or beta chain is liganded. The ease of polymerization and low solubility of sickle hemoglobin is dependent not only on quaternary, but on tertiary structural changes, as well as on the substitution of Val for Glu at the beta 6 position.
Collapse
Affiliation(s)
- K Adachi
- Children's Hospital of Philadelphia, Department of Pediatrics, PA 19104
| | | | | |
Collapse
|
48
|
Shibayama N, Imai K, Hirata H, Hiraiwa H, Morimoto H, Saigo S. Oxygen equilibrium properties of highly purified human adult hemoglobin cross-linked between 82 beta 1 and 82 beta 2 lysyl residues by bis(3,5-dibromosalicyl) fumarate. Biochemistry 1991; 30:8158-65. [PMID: 1907852 DOI: 10.1021/bi00247a010] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We investigated oxygen equilibrium properties of highly purified human adult hemoglobin cross-linked between lysine-82 beta 1 and lysine-82 beta 2 by a fumaryl group, which is prepared by reaction of the CO form with bis(3,5-dibromosalicyl) fumarate. The cross-linked hemoglobin preparation isolated by the previous purification method, namely, gel filtration in the presence of 1 M MgCl2 followed by ion-exchange chromatography, was found to be contaminated with about 20% of an electrophoretically silent impurity that shows remarkably high affinity for oxygen. This impurity was separated from the desired cross-linked hemoglobin by a newly developed purification method, which utilizes a difference between the authentic hemoglobin and the impurity in reactivity of the sulfhydryl groups of cysteine-93 beta toward N-ethylmaleimide under a deoxygenated condition. After this purification procedure, the oxygen equilibrium properties of purified cross-linked hemoglobin in the absence of organic phosphate became very similar to those of unmodified hemoglobin with respect to oxygen affinity, cooperativity, and the alkaline Bohr effect. The functional similarity between the cross-linked hemoglobin and unmodified hemoglobin allows us to utilize this cross-linking for preparing asymmetric hybrid hemoglobin tetramers, which are particularly useful as intermediately liganded models. Previous studies on this type of cross-linked hemoglobin should be subject to reexamination due to the considerable amount of the impurity.
Collapse
Affiliation(s)
- N Shibayama
- Department of Physics, Jichi Medical School, Tochigi, Japan
| | | | | | | | | | | |
Collapse
|
49
|
Abstract
We have determined the structure of a T-state haemoglobin in which the haem groups of the beta subunits have carbon monoxide bound, and the alpha subunits have nickel replacing the haem iron and are ligand-free. The structural adjustments on binding ligand in the T state are in the same direction as those associated with the quaternary transition, and a translational shift of the haem is severely restricted. We explain how these observations may account for the low ligand affinity of the beta haem of T-state haemoglobin.
Collapse
Affiliation(s)
- B Luisi
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511
| | | | | | | |
Collapse
|
50
|
Abstract
We report the X-ray crystal structure of two analogues of human haemoglobin in the deoxy quaternary (T) state with ligand bound exclusively at the alpha haems. These models were prepared from symmetric, mixed-metal hybrid haemoglobin molecules. The structures of alpha Fe(II) beta Co(II), its carbonmonoxy derivative alpha Fe(II)CO beta Co(II), and alpha Fe(II)O2 beta Ni(II) are compared with native deoxy haemoglobin by difference Fourier syntheses at 2.8, 2.9 and 3.5 A resolution, respectively, and the refined alpha Fe(II)CO beta Co(II) structure is analysed. In both the native deoxy and liganded T molecules, the mean plane of the alpha-subunit haem is parallel with the axis of the F helix, but this plane is tilted with respect to the helix axis in the oxy-quaternary R state. The side-chains of LeuFG3 and ValFG5 sterically restrict haem tilting in the T state. We propose that strain energy develops at the contact between the haem and these residues in the liganded T-state haemoglobin, and that the strain is, in part, responsible for the low affinity of the T-state alpha haem.
Collapse
Affiliation(s)
- B Luisi
- Medical Research Council Laboratory of Molecular Biology, Cambridge, England
| | | |
Collapse
|