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Mamgain S, Yella A. Dynamics of interfacial charge transfer between CsPbBr 3perovskite nanocrystals and molecular acceptors for photodetection application. NANOTECHNOLOGY 2024; 35:165202. [PMID: 38176067 DOI: 10.1088/1361-6528/ad1afe] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
Perovskite nanocrystals (NCs) recently emerged as a suitable candidate for optoelectronic applications because of its simplistic synthesis approach and superior optical properties. For better device performance, the effective absorption of incident photons and the understanding of charge transfer (CT) process are the basic requirements. Herein, we investigate the interfacial charge transfer dynamics of CsPbBr3NCs in the presence of different molecular acceptors; 7,7,8,8-Tetracyanoquinodimethane (TCNQ) and 11,11,12,12 tetracyanonaphtho-2,6-quinodimethane (TCNAQ). The vivid change in CT dynamics at the interfaces of NCs and two different molecular acceptors (TCNQ and TCNAQ) has been observed. The results demonstrate that the ground state complex formation in the presence of TCNQ acts as additional driving force to accelerate the charge transfer between the NCs and molecular acceptor. Moreover, this donor (NCs)-acceptor (TCNQ, TCNAQ) system results in the higher absorption of incident photons. Finally, the photo detector based on CsPbBr3-TCNQ system was fabricated for the first time. The device exhibited a high on-off ratio (104). Furthermore, the CsPbBr3-TCNQ photodetector shows a fast photoresponse times of 180 ms/110 ms (rise/decay time) with a specific detectivity (D*) of 5.2 × 1011Jones. The simple synthesis and outstanding photodetection abilities of this perovskite NCs-molecular acceptor system make them potential candidates for optoelectronic applications.
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Affiliation(s)
- Swati Mamgain
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, 400076, India
| | - Aswani Yella
- Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, 400076, India
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2
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Tozawa M, Miyamae C, Akiyoshi K, Kameyama T, Yamamoto T, Motomura G, Fujisaki Y, Uematsu T, Kuwabata S, Torimoto T. One-pot synthesis of Ag-In-Ga-S nanocrystals embedded in a Ga 2O 3 matrix and enhancement of band-edge emission by Na + doping. NANOSCALE ADVANCES 2023; 5:7057-7066. [PMID: 38059040 PMCID: PMC10696949 DOI: 10.1039/d3na00755c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/13/2023] [Indexed: 12/08/2023]
Abstract
I-III-VI-based semiconductor quantum dots (QDs) have been intensively explored because of their unique controllable optoelectronic properties. Here we report one-pot synthesis of Na-doped Ag-In-Ga-S (AIGS) QDs incorporated in a Ga2O3 matrix. The obtained QDs showed a sharp band-edge photoluminescence peak at 557 nm without a broad-defect site emission. The PL quantum yield (QY) of such QDs was 58%, being much higher than that of AIGS QDs without Na+ doping, 29%. The obtained Na-doped AIGS/Ga2O3 composite particles were used as an emitting layer of green QD light-emitted diodes. A sharp electroluminescence (EL) peak was observed at 563 nm, being similar to that in the PL spectrum of the QDs used. The external quantum efficiency of the device was 0.6%.
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Affiliation(s)
- Makoto Tozawa
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Chie Miyamae
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Kazutaka Akiyoshi
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Tatsuya Kameyama
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Takahisa Yamamoto
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Genichi Motomura
- Science & Technology Research Laboratories, Japan Broadcasting Corporation (NHK) 1-10-11 Kinuta, Setagaya-ku Tokyo 157-8510 Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
| | - Yoshihide Fujisaki
- Science & Technology Research Laboratories, Japan Broadcasting Corporation (NHK) 1-10-11 Kinuta, Setagaya-ku Tokyo 157-8510 Japan
| | - Taro Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Susumu Kuwabata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Tsukasa Torimoto
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
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3
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Kubba R, Kumar Singh M, Yadav O, Kumar A. Fӧrster resonance energy transfer (FRET) between CdSe quantum dots and ABA phosphorus(V) corroles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122345. [PMID: 36657286 DOI: 10.1016/j.saa.2023.122345] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 12/21/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
In this article, highly fluorescent phosphorus(V) corrole was synthesised which was then combined with CdSe quantum dots (QDs) in order to study Förster resonance energy transfer (FRET) mechanism between CdSe QDs (donor) and phosphorus corrole (acceptor). Spectral overlap between QD's emission profile and corrole's absorption profile was found to be significant enough to result into Förster resonance energy transfer (FRET). The UV-vis spectrum experienced increase in the absorption bands on addition of phosphorus corrole to CdSe QDs suggesting QD-corrole conjugation. In the steady state fluorescence measurements, emission spectrum observed quenching in the fluorescence intensity of prepared CdSe QDs on addition of phosphorus corrole. Likewise, in case of time-resolved fluorescence measurements it was noticed that the CdSe QD's lifetime was greatly quenched by the presence of a corrole acceptor. Stern-Volmer plot was made to show quenching in this case was dynamic in nature. Based on the results of UV-vis, steady state and time-resolved fluorescence measurements the plausible mechanism behind such observations is considered to be FRET.
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Affiliation(s)
- Ritika Kubba
- Department of Applied Chemistry, Delhi Technological University, Delhi 42, India
| | | | - Omprakash Yadav
- Department of Chemistry, ARSD College, University of Delhi, Delhi, India
| | - Anil Kumar
- Department of Applied Chemistry, Delhi Technological University, Delhi 42, India.
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4
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Satapathy P, Vasudeva N, Oinam J, Prasad SK. Enhanced luminescence, electric-field and actinic-light modulation of emission in nematic-CdSeS gradient nanocrystal composites by polymer confinement. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Faradaic junction and isoenergetic charge transfer mechanism on semiconductor/semiconductor interfaces. Nat Commun 2021; 12:6363. [PMID: 34737293 PMCID: PMC8569189 DOI: 10.1038/s41467-021-26661-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 10/14/2021] [Indexed: 11/10/2022] Open
Abstract
Energy band alignment theory has been widely used to understand interface charge transfer in semiconductor/semiconductor heterojunctions for solar conversion or storage, such as quantum-dot sensitized solar cells, perovskite solar cells and photo(electro)catalysis. However, abnormally high open-circuit voltage and charge separation efficiency in these applications cannot be explained by the classic theory. Here, we demonstrate a Faradaic junction theory with isoenergetic charge transfer at semiconductor/semiconductor interface. Such Faradaic junction involves coupled electron and ion transfer, which is substantively different from the classic band alignment theory only involving electron transfer. The Faradaic junction theory can be used to explain these abnormal results in previous studies. Moreover, the characteristic of zero energy loss of charge transfer in a Faradaic junction also can provide a possibility to design a solar conversion device with a large open-circuit voltage beyond the Shockley-Queisser limit by the band alignment theory. Energy band alignment theory is used to understand interface charge transfer in semiconductor/semiconductor junctions but many abnormal results cannot be well explained. Here, the authors demonstrate a Faradaic junction theory with isoenergetic charge transfer at semiconductor/semiconductor interfaces to explain these abnormal results.
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6
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Bellani S, Bartolotta A, Agresti A, Calogero G, Grancini G, Di Carlo A, Kymakis E, Bonaccorso F. Solution-processed two-dimensional materials for next-generation photovoltaics. Chem Soc Rev 2021; 50:11870-11965. [PMID: 34494631 PMCID: PMC8559907 DOI: 10.1039/d1cs00106j] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Indexed: 12/12/2022]
Abstract
In the ever-increasing energy demand scenario, the development of novel photovoltaic (PV) technologies is considered to be one of the key solutions to fulfil the energy request. In this context, graphene and related two-dimensional (2D) materials (GRMs), including nonlayered 2D materials and 2D perovskites, as well as their hybrid systems, are emerging as promising candidates to drive innovation in PV technologies. The mechanical, thermal, and optoelectronic properties of GRMs can be exploited in different active components of solar cells to design next-generation devices. These components include front (transparent) and back conductive electrodes, charge transporting layers, and interconnecting/recombination layers, as well as photoactive layers. The production and processing of GRMs in the liquid phase, coupled with the ability to "on-demand" tune their optoelectronic properties exploiting wet-chemical functionalization, enable their effective integration in advanced PV devices through scalable, reliable, and inexpensive printing/coating processes. Herein, we review the progresses in the use of solution-processed 2D materials in organic solar cells, dye-sensitized solar cells, perovskite solar cells, quantum dot solar cells, and organic-inorganic hybrid solar cells, as well as in tandem systems. We first provide a brief introduction on the properties of 2D materials and their production methods by solution-processing routes. Then, we discuss the functionality of 2D materials for electrodes, photoactive layer components/additives, charge transporting layers, and interconnecting layers through figures of merit, which allow the performance of solar cells to be determined and compared with the state-of-the-art values. We finally outline the roadmap for the further exploitation of solution-processed 2D materials to boost the performance of PV devices.
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Affiliation(s)
- Sebastiano Bellani
- BeDimensional S.p.A., Via Lungotorrente Secca 30R, 16163 Genova, Italy.
- Istituto Italiano di Tecnologia, Graphene Labs, via Moreogo 30, 16163 Genova, Italy
| | - Antonino Bartolotta
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Via F. Stagno D'alcontres 37, 98158 Messina, Italy
| | - Antonio Agresti
- CHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", via del Politecnico 1, 00133 Roma, Italy
| | - Giuseppe Calogero
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Via F. Stagno D'alcontres 37, 98158 Messina, Italy
| | - Giulia Grancini
- University of Pavia and INSTM, Via Taramelli 16, 27100 Pavia, Italy
| | - Aldo Di Carlo
- CHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", via del Politecnico 1, 00133 Roma, Italy
- L.A.S.E. - Laboratory for Advanced Solar Energy, National University of Science and Technology "MISiS", 119049 Leninskiy Prosect 6, Moscow, Russia
| | - Emmanuel Kymakis
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University, Estavromenos 71410 Heraklion, Crete, Greece
| | - Francesco Bonaccorso
- BeDimensional S.p.A., Via Lungotorrente Secca 30R, 16163 Genova, Italy.
- Istituto Italiano di Tecnologia, Graphene Labs, via Moreogo 30, 16163 Genova, Italy
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7
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Mitchell J, Weimer JJ. Controlled Spreading Rates to Distribute Nanoparticles as Uniform Langmuir Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5139-5150. [PMID: 33872033 DOI: 10.1021/acs.langmuir.1c00032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We report on using a controlled spreading rate to create Langmuir films of nanoparticles with more uniform, macroscale packing. A dispersion of hydrophobic quantum dots in n-hexane was deposited on subphase solutions containing various compositions of water and glycerol. Fluorescence images were captured as the film spread radially. An average spreading rate was defined using film radius and time at maximum expansion. On water with the highest spreading rate, films have an open region surrounded by a coffee ring. At a well-defined slower spreading rate, a distinct inner compact region appears between the open film and coffee ring, now called an outer compact region. As the spreading rate decreases further, the relative position for the open film boundary moves inward while the relative areas for the inner and outer compact regions increase. Films are the smallest in size at the slowest spreading rate on glycerol. The patterns are button-like with a central depleted region (open film), compact inner and outer regions, and a less-dense outer edge region. Normalized radial profiles were used to generate a partition map for the relative radial positions marking each film region at different spreading rates. Area number densities were calculated in the highest-packed regions. The values give no conclusive evidence that nanoparticles stack as multilayers, even the most compactly covered regions. Films spreading on glycerol form the most uniform, circular-shaped, densely packed arrangement of nanoparticles as their final pattern.
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Song H, Lin Y, Zhang Z, Rao H, Wang W, Fang Y, Pan Z, Zhong X. Improving the Efficiency of Quantum Dot Sensitized Solar Cells beyond 15% via Secondary Deposition. J Am Chem Soc 2021; 143:4790-4800. [PMID: 33734670 DOI: 10.1021/jacs.1c01214] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Low loading is one of the bottlenecks limiting the performance of quantum dot sensitized solar cells (QDSCs). Although previous QD secondary deposition relying on electrostatic interaction can improve QD loading, due to the introduction of new recombination centers, it is not capable of enhancing the photovoltage and fill factor. Herein, without the introduction of new recombination centers, a convenient QD secondary deposition approach is developed by creating new adsorption sites via the formation of a metal oxyhydroxide layer around QD presensitized photoanodes. MgCl2 solution treated Zn-Cu-In-S-Se (ZCISSe) QD sensitized TiO2 film electrodes have been chosen as a model device to investigate this secondary deposition approach. The experimental results demonstrate that additional 38% of the QDs are immobilized on the photoanode as a single layer. Due to the increased QD loading and concomitant enhanced light-harvesting capacity and reduced charge recombination, not only photocurrent but also photovoltage and fill factor have been remarkably enhanced. The average PCE of resulted ZCISSe QDSCs is boosted to 15.31% (Jsc = 26.52 mA cm-2, Voc = 0.802 V, FF = 0.720), from the original 13.54% (Jsc = 24.23 mA cm-2, Voc = 0.789 V, FF = 0.708). Furthermore, a new certified PCE record of 15.20% has been obtained for liquid-junction QDSCs.
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Affiliation(s)
- Han Song
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Yu Lin
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Zhengyan Zhang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Huashang Rao
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Wenran Wang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Yueping Fang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Zhenxiao Pan
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
| | - Xinhua Zhong
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, People's Republic of China
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9
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Panuganti S, Besteiro LV, Vasileiadou ES, Hoffman JM, Govorov AO, Gray SK, Kanatzidis MG, Schaller RD. Distance Dependence of Förster Resonance Energy Transfer Rates in 2D Perovskite Quantum Wells via Control of Organic Spacer Length. J Am Chem Soc 2021; 143:4244-4252. [DOI: 10.1021/jacs.0c12441] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Shobhana Panuganti
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Lucas V. Besteiro
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
- Institut National de la Recherche Scientifique-Énergie, Matériaux et Télécommunications, Montreal, Quebec H5A 1K6, Canada
| | - Eugenia S. Vasileiadou
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Justin M. Hoffman
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alexander O. Govorov
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, United States
| | | | - Mercouri G. Kanatzidis
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Richard D. Schaller
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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10
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Vassilyeva OY, Buvaylo EA, Lobko YV, Linnik RP, Kokozay VN, Skelton BW. Organic-inorganic hybrid tetrachlorocadmates as promising fluorescent agents for cross-linked polyurethanes: synthesis, crystal structures and extended performance analysis. RSC Adv 2021; 11:7713-7722. [PMID: 35423254 PMCID: PMC8695196 DOI: 10.1039/d0ra10787e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 02/08/2021] [Indexed: 01/12/2023] Open
Abstract
The aim of this work is to apply organic–inorganic hybrid salts made of imidazo[1,5-a]pyridinium-based cations and halometallate anions as fluorescent agents to modify cross-linked polyurethane (CPU) for the creation of flexible photoluminescent films. The use of ionic compounds ensures excellent dispersion of the luminescent components in the polymer matrix and prevents solid-state quenching. The absence of phase segregation makes it possible to fabricate uniformly luminescent films with a large area. To this, new tetrachlorocadmate salts [L]2[CdCl4] (1) and [L′]2[CdCl4] (2), where L+ is 2-methyl-3-(pyridin-2-yl)imidazo[1,5-a]pyridinium and [L′]+ is 2-methylimidazo[1,5-a]pyridinium cations, have been prepared and characterized by IR, NMR, UV-Vis spectroscopy and single crystal X-ray diffraction. The organic cations resulted from the oxidative cyclization-condensation involving CH3NH2·HCl and 2-pyridinecarbaldehyde in methanol (1), and formaldehyde, CH3NH2·HCl and 2-pyridinecarbaldehyde in an aqueous media (2). In the crystal of 1, loosely packed tetrahedral cations and π–π stacked anions are arranged in separate columns parallel to the a-axis. The pseudo-layered structure of 2 is built of the organic and inorganic layers alternating along the a axis. The adjacent CdCl42− anions in the inorganic layer show no connectivity. The organic–inorganic hybrids 1 and 2 were immobilized in situ in the cross-linked polyurethane in low content (1 wt%). The photoluminescent properties of 1 and 2 in the solid state and in the polymer films were investigated. The semi-transparent CPU films, that remain stable for months, retain the photoluminescent ability of both hybrids in the blue region with a prominent red shift in their emission. Hybrid salts made of imidazo[1,5-a]pyridinium-based cations with easily tunable electronic structures, and halometallate anions that do not include any rare-earth or noble metals were used to fabricate flexible luminescent CPU films.![]()
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Affiliation(s)
- Olga Yu Vassilyeva
- Department of Chemistry, Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. Kyiv 01601 Ukraine
| | - Elena A Buvaylo
- Department of Chemistry, Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. Kyiv 01601 Ukraine
| | - Yevheniia V Lobko
- Department of Surface and Plasma Science, Charles University V Holešovičkách 2 Prague 18000 Czech Republic
| | - Rostyslav P Linnik
- Department of Chemistry, Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. Kyiv 01601 Ukraine
| | - Vladimir N Kokozay
- Department of Chemistry, Taras Shevchenko National University of Kyiv 64/13 Volodymyrska str. Kyiv 01601 Ukraine
| | - Brian W Skelton
- School of Molecular Sciences, University of Western Australia M310 Perth WA 6009 Australia
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11
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Oh I, Lee H, Kim TW, Kim CW, Jun S, Kim C, Choi EH, Rhee YM, Kim J, Jang W, Ihee H. Enhancement of Energy Transfer Efficiency with Structural Control of Multichromophore Light-Harvesting Assembly. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001623. [PMID: 33101863 PMCID: PMC7578888 DOI: 10.1002/advs.202001623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/24/2020] [Indexed: 06/11/2023]
Abstract
Multichromophore systems (MCSs) are envisioned as building blocks of molecular optoelectronic devices. While it is important to understand the characteristics of energy transfer in MCSs, the effect of multiple donors on energy transfer has not been understood completely, mainly due to the lack of a platform to investigate such an effect systematically. Here, a systematic study on how the number of donors (n D) and interchromophore distances affect the efficiency of energy transfer (η FRET) is presented. Specifically, η FRET is calculated for a series of model MCSs using simulations, a series of multiporphyrin dendrimers with systematic variation of n D and interdonor distances is synthesized, and η FRETs of those dendrimers using transient absorption spectroscopy are measured. The simulations predict η FRET in the multiporphyrin dendrimers well. In particular, it is found that η FRET is enhanced by donor-to-donor energy transfer only when structural heterogeneity exists in an MCS, and the relationships between the η FRET enhancement and the structural parameters of the MCS are revealed.
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Affiliation(s)
- Inhwan Oh
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
- Center for Nanomaterials and Chemical ReactionsInstitute for Basic Science (IBS)Daejeon34141Republic of Korea
- KI for the BioCenturyKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Hosoowi Lee
- Department of ChemistryCollege of ScienceYonsei UniversitySeoul120‐749Republic of Korea
| | - Tae Wu Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
- Center for Nanomaterials and Chemical ReactionsInstitute for Basic Science (IBS)Daejeon34141Republic of Korea
- KI for the BioCenturyKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Chang Woo Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Sunhong Jun
- Center for Nanomaterials and Chemical ReactionsInstitute for Basic Science (IBS)Daejeon34141Republic of Korea
| | - Changwon Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
- Center for Nanomaterials and Chemical ReactionsInstitute for Basic Science (IBS)Daejeon34141Republic of Korea
- KI for the BioCenturyKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Eun Hyuk Choi
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
- Center for Nanomaterials and Chemical ReactionsInstitute for Basic Science (IBS)Daejeon34141Republic of Korea
- KI for the BioCenturyKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Young Min Rhee
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
| | - Jeongho Kim
- Department of ChemistryInha UniversityIncheon22212Republic of Korea
| | - Woo‐Dong Jang
- Department of ChemistryCollege of ScienceYonsei UniversitySeoul120‐749Republic of Korea
| | - Hyotcherl Ihee
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
- Center for Nanomaterials and Chemical ReactionsInstitute for Basic Science (IBS)Daejeon34141Republic of Korea
- KI for the BioCenturyKorea Advanced Institute of Science and Technology (KAIST)Daejeon34141Republic of Korea
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12
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Zinc(II) and Cadmium(II) complexes containing imidazole ring: Structural, spectroscopic, antibacterial, DFT calculations and Hirshfeld surface analysis. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119610] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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13
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Santos CIL, S. Machado W, Wegner KD, Gontijo LAP, Bettini J, Schiavon MA, Reiss P, Aldakov D. Hydrothermal Synthesis of Aqueous-Soluble Copper Indium Sulfide Nanocrystals and Their Use in Quantum Dot Sensitized Solar Cells. NANOMATERIALS 2020; 10:nano10071252. [PMID: 32605163 PMCID: PMC7407332 DOI: 10.3390/nano10071252] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/17/2020] [Accepted: 06/22/2020] [Indexed: 12/24/2022]
Abstract
A facile hydrothermal method to synthesize water-soluble copper indium sulfide (CIS) nanocrystals (NCs) at 150 °C is presented. The obtained samples exhibited three distinct photoluminescence peaks in the red, green and blue spectral regions, corresponding to three size fractions, which could be separated by means of size-selective precipitation. While the red and green emitting fractions consist of 4.5 and 2.5 nm CIS NCs, the blue fraction was identified as in situ formed carbon nanodots showing excitation wavelength dependent emission. When used as light absorbers in quantum dot sensitized solar cells, the individual green and red fractions yielded power conversion efficiencies of 2.9% and 2.6%, respectively. With the unfractionated samples, the efficiency values approaching 5% were obtained. This improvement was mainly due to a significantly enhanced photocurrent arising from complementary panchromatic absorption.
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Affiliation(s)
- Calink I. L. Santos
- Grupo de Pesquisa em Química de Materiais (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio, 74, CEP 36301-160 São João del-Rei, MG, Brazil; (C.I.L.S.); (W.S.M.); (L.A.P.G.); (M.A.S.)
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, STEP, 38000 Grenoble, France; (K.D.W.); (P.R.)
| | - Wagner S. Machado
- Grupo de Pesquisa em Química de Materiais (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio, 74, CEP 36301-160 São João del-Rei, MG, Brazil; (C.I.L.S.); (W.S.M.); (L.A.P.G.); (M.A.S.)
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, STEP, 38000 Grenoble, France; (K.D.W.); (P.R.)
| | - Karl David Wegner
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, STEP, 38000 Grenoble, France; (K.D.W.); (P.R.)
| | - Leiriana A. P. Gontijo
- Grupo de Pesquisa em Química de Materiais (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio, 74, CEP 36301-160 São João del-Rei, MG, Brazil; (C.I.L.S.); (W.S.M.); (L.A.P.G.); (M.A.S.)
| | - Jefferson Bettini
- Laboratório Nacional de Nanotecnologia, Centro Nacional de Pesquisa em Energia e Materiais, CEP 13083-970 Campinas-SP, Brazil;
| | - Marco A. Schiavon
- Grupo de Pesquisa em Química de Materiais (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio, 74, CEP 36301-160 São João del-Rei, MG, Brazil; (C.I.L.S.); (W.S.M.); (L.A.P.G.); (M.A.S.)
| | - Peter Reiss
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, STEP, 38000 Grenoble, France; (K.D.W.); (P.R.)
| | - Dmitry Aldakov
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, STEP, 38000 Grenoble, France; (K.D.W.); (P.R.)
- Correspondence:
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14
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Czylkowska A, Szczesio M, Pietrzak A, Raducka A, Rogalewicz B. Novel Coordination Polymer of Cadmium (II) with L-Tryptophan. MATERIALS 2020; 13:ma13102266. [PMID: 32423064 PMCID: PMC7288201 DOI: 10.3390/ma13102266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/08/2020] [Accepted: 05/12/2020] [Indexed: 11/16/2022]
Abstract
A new cadmium (II) polymeric coordination compound with tryptophan (Trp) of general formula {[Cd(L-Trp)2(H2O)Cl]∙(Trp)∙(H2O)}n was synthesized. The monocrystals of the investigated complex were obtained using the method of slow evaporation. The crystal and molecular structure was determined. The compound was crystallized in the orthorhombic P212121 space group. The cadmium atom was seven coordinates by two oxygen atoms from one bidentate-chelating carboxylate group of bridging Trp, two oxygen atoms from one bidentate-chelating carboxylate group from a monodentate organic ligand, one oxygen atom of water molecule, one nitrogen atom of the amino group from bridging Trp and one chlorine atom, which means that every tridentate Trp substituent was bridging towards one cadmium atom and bidentate chelating towards one another. The monodentate Trp is a zwitterionic molecule. The coordination led to the formation of 1D supramolecular chains entrapping water and Trp molecules.
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15
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Abbas MA, Khan R, Yoon SJ, Bang JH. Role of Regeneration of Nanoclusters in Dictating the Power Conversion Efficiency of Metal-Nanocluster-Sensitized Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2020; 12:16566-16575. [PMID: 32180393 DOI: 10.1021/acsami.0c03357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Metal nanoclusters (NCs) have emerged as feasible alternatives to dyes and quantum dots in light energy conversion applications. Despite the remarkable enhancement in power conversion efficiency (PCE) in recent years and the increase in the number of NCs available as sensitizers, a comprehensive understanding of the various interfacial charge-transfer, transport, and recombination events in NCs is still lacking. This understanding is vital to the establishment of design principles for an efficient photoelectrode that uses NCs. In this work, we carefully design a comparison study of two representative NCs, Au and Ag, based on transient absorption spectroscopy and electrochemical impedance spectroscopy, methods that shed light on the true benefits and limitations of NC sensitizers. Low NC regeneration efficiency is the most critical factor that limits the performance of metal-nanocluster-sensitized solar cells (MCSSCs). The slow regeneration that results from sluggish hole transfer kinetics not only limits photocurrent generation efficiency but also has a profound effect on the stability of MCSSCs. This finding calls for urgent attention to the development of an efficient redox couple that has a great hole-extraction ability and no corrosive nature. This work also reveals different interfacial behaviors of Au and Ag NCs in photoelectrodes, suggesting that utilizing the benefits of both types of NCs simultaneously by cosensitization or using AuAg alloy NCs may be one avenue for further PCE improvement in MCSSCs.
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Affiliation(s)
- Muhammad A Abbas
- Nanosensor Research Institute, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Rizwan Khan
- Department of Bionano Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Seog Joon Yoon
- Notre Dame Radiation Laboratory, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk-do 38541, Republic of Korea
| | - Jin Ho Bang
- Nanosensor Research Institute, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
- Department of Bionano Technology, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
- Department of Chemical and Molecular Engineering and Department of Applied Chemistry, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Republic of Korea
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16
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Mbese JZ, Meyer EL, Agoro MA. Electrochemical Performance of Photovoltaic Cells using HDA Capped-SnS Nanocrystal from bis ( N-1,4-Phenyl- N-Morpho-Dithiocarbamato) Sn(II) Complexes. NANOMATERIALS 2020; 10:nano10030414. [PMID: 32120983 PMCID: PMC7152851 DOI: 10.3390/nano10030414] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/12/2020] [Accepted: 02/19/2020] [Indexed: 12/14/2022]
Abstract
Great consideration is placed on the choice of capping agents' base on the proposed application, in order to cater to the particular surface, size, geometry, and functional group. Change in any of the above can influence the characteristics properties of the nanomaterials. The adoption of hexadecylamine (HDA) as a capping agent in single source precursor approach offers better quantum dots (QDs) sensitizer materials with good quantum efficiency photoluminescence and desirable particles size. Structural, morphological, and electrochemical instruments were used to evaluate the characterization and efficiency of the sensitizers. The cyclic voltammetry (CV) results display both reduction and oxidation peaks for both materials. XRD for SnS/HDA and SnS photosensitizers displays eleven peaks within the values of 27.02° to 66.05° for SnS/HDA and 26.03° to 66.04° for SnS in correlation to the orthorhombic structure. Current density-voltage (I-V) results for SnS/HDA exhibited a better performance compared to SnS sensitizers. Bode plot results indicate electrons lifetime (τ) for SnS/HDA photosensitizer have superiority to the SnS photosensitizer. The results connote that SnS/HDA exhibited a better performance compared to SnS sensitizers due to the presence of HDA capping agent.
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Affiliation(s)
- Johannes Z. Mbese
- Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
- Correspondence: (J.Z.M.); (E.L.M); (M.A.A.)
| | - Edson L. Meyer
- Fort Hare Institute of Technology, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
- Correspondence: (J.Z.M.); (E.L.M); (M.A.A.)
| | - Mojeed A. Agoro
- Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
- Fort Hare Institute of Technology, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa
- Correspondence: (J.Z.M.); (E.L.M); (M.A.A.)
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17
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Manna S, Zangrando E, Manna SC. Schiff base and azido coordinated di-/poly-nuclear cadmium(II) complexes: Crystal structure, photocatalytic degradation of methylene blue and thermal analysis. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114296] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Ganguly P, Mathew S, Clarizia L, Kumar R S, Akande A, Hinder SJ, Breen A, Pillai SC. Ternary Metal Chalcogenide Heterostructure (AgInS 2-TiO 2) Nanocomposites for Visible Light Photocatalytic Applications. ACS OMEGA 2020; 5:406-421. [PMID: 31956788 PMCID: PMC6964301 DOI: 10.1021/acsomega.9b02907] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/09/2019] [Indexed: 06/01/2023]
Abstract
Hybrid nanoarchitectures of AgInS2 and TiO2 photocatalysts were prepared by using a modified sol-gel method. The experimental results reveal that these nanocomposites display enhanced visible light absorption and effective charge carrier separation compared to their pristine parent samples (AgInS2 or TiO2). 0.5 wt % AgInS2 loading was found to be the optimum concentration for photocatalytic applications. More than 95% of doxycycline degradation was achieved within 180 min of solar light illumination. Similarly, the dopant concentrations at lower values (<2 wt %) exhibited 300 times higher H2 generation rate under visible light irradiation compared to AgInS2 and TiO2. The microbial strains (Escherichia coli and Staphylococcus aureus) exhibited a 99.999% reduction within half an hour of simulated solar light illumination. The computational investigation was employed to understand the structural, electronic, and the dielectric properties of AgInS2 and TiO2 composites. The improved photocatalytic results are explained as a result of the decreased rate of exciton recombination. The current investigation opens up new insights into the use of novel ternary heterostructure nanocomposites for improved visible light activity.
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Affiliation(s)
- Priyanka Ganguly
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Snehamol Mathew
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Laura Clarizia
- Dipartimento
di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, p. le V. Tecchio 80, 80125 Napoli, Italia
| | - Syam Kumar R
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Akinlolu Akande
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Steven J. Hinder
- The
Surface Analysis Laboratory, Faculty of Engineering and Physical Sciences, University of Surrey, GU2 7XH Guildford, Surrey, United Kingdom
| | - Ailish Breen
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Suresh C. Pillai
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
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19
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Purcell-Milton F, Curutchet A, Gun’ko Y. Electrophoretic Deposition of Quantum Dots and Characterisation of Composites. MATERIALS 2019; 12:ma12244089. [PMID: 31817844 PMCID: PMC6947596 DOI: 10.3390/ma12244089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 11/16/2022]
Abstract
Electrophoretic deposition (EPD) is an emerging technique in nanomaterial-based device fabrication. Here, we report an in-depth study of this approach as a means to deposit colloidal quantum dots (CQDs), in a range of solvents. For the first time, we report the significant improvement of EPD performance via the use of dichloromethane (DCM) for deposition of CQDs, producing a corresponding CQD-TiO2 composite with a near 10-fold increase in quantum dot loading relative to more commonly used solvents such as chloroform or toluene. We propose this effect is due to the higher dielectric constant of the solvent relative to more commonly used and therefore the stronger effect of EPD in this medium, though there remains the possibility that changes in zeta potential may also play an important role. In addition, this solvent choice enables the true universality of QD EPD to be demonstrated, via the sensitization of porous TiO2 electrodes with a range of ligand capped CdSe QDs and a range of group II-VI CQDs including CdS, CdSe/CdS, CdS/CdSe and CdTe/CdSe, and group IV-VI PbS QDs.
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Affiliation(s)
- Finn Purcell-Milton
- School of Chemistry, Trinity College Dublin, University of Dublin, Dublin 2, Ireland;
- BEACON, Bioeconomy Research Centre, University College Dublin, Dublin 4, Ireland
- Correspondence: (F.P.M.); (Y.G.)
| | - Antton Curutchet
- School of Chemistry, Trinity College Dublin, University of Dublin, Dublin 2, Ireland;
| | - Yurii Gun’ko
- School of Chemistry, Trinity College Dublin, University of Dublin, Dublin 2, Ireland;
- BEACON, Bioeconomy Research Centre, University College Dublin, Dublin 4, Ireland
- Correspondence: (F.P.M.); (Y.G.)
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20
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Pan Z, Yue L, Rao H, Zhang J, Zhong X, Zhu Z, Jen AKY. Boosting the Performance of Environmentally Friendly Quantum Dot-Sensitized Solar Cells over 13% Efficiency by Dual Sensitizers with Cascade Energy Structure. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1903696. [PMID: 31621961 DOI: 10.1002/adma.201903696] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 09/20/2019] [Indexed: 06/10/2023]
Abstract
Generally, high light-harvesting efficiency, electron-injection efficiency, and charge-collection efficiency are the prerequisites for high-efficiency quantum-dot-sensitized solar cells (QDSCs). However, it is fairly difficult for a single QD sensitizer to meet these three requirements simultaneously. It is demonstrated that these parameters can be felicitously balanced by a cosensitization strategy through the adoption of environmental-friendly Zn-Cu-In-Se and Zn-Cu-In-S dual QD sensitizers with cascade energy structure. Experimental results indicate that: i) the combination of the dual QDs can improve the light-harvesting capability of the cells, especially in the visible light window; ii) the cosensitization approach can facilitate electron injection, benefitting from the cascade energy structure of the two QD sensitizers employed; iii) the charge-collection efficiency can be remarkably enhanced by the suppressed charge-recombination process due to the improved QD coverage on TiO2 . Consequently, this cosensitization strategy delivers a new certified efficiency record of 12.98% for liquid-junction QDSCs under AM 1.5G 1 sun irradiation. Moreover, the constructed cells exhibit good stability in a high-humidity environment.
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Affiliation(s)
- Zhenxiao Pan
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Liang Yue
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Huashang Rao
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Jie Zhang
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Xinhua Zhong
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Zonglong Zhu
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Alex K-Y Jen
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
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21
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Maity P, Ghosh HN. Strategies for extending charge separation in colloidal nanostructured quantum dot materials. Phys Chem Chem Phys 2019; 21:23283-23300. [PMID: 31621729 DOI: 10.1039/c9cp03551f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Semiconductor colloidal metal chalcogenides (II-VI) in the form of quantum dots (QDs) and different heterostructures (core/shell, alloys, etc.) are of extensive interest in scientific research for both a fundamental understanding and technological applications because of their quantized size and different optical properties; however, due to their small size, the exciton (bound electron and hole) experiences a strong Coulombic attraction, which has a remarkable impact on the charge separation and photophysical properties of QDs. Thus, to achieve an efficient charge separation, numerous attempts have been made via the formation of different heterostructures, QD/molecular adsorbate (either organic or inorganic) assemblies, etc. These hybrid materials ameliorated the absorption of the incident light as well as charge separation. This article reviews the strategies for extending charge separation in these colloidal nanocrystals (NCs), which is one of the crucial steps to elevate the solar to electrical energy conversion efficiency in a quantum dot-sensitized solar cell (QDSC). The article summarizes the benefits of co-sensitization and experimental shreds of evidence for the multiple charge transfer processes involved in a QDSC. Studies have shown that in the co-sensitization process, prolonged charge separation occurs via the dual behavior of the molecular adsorbate, sensitization (electron injection) and capture of holes from photoexcited QDs. This perspective emphases band edge engineering and control of charge carrier dynamics in various core/shell structures. The impact of colloidal alloy NCs on charge separation and interesting photophysical properties was recapitulated via the steady-state and time-resolved photoluminescence (PL) and femtosecond transient absorption spectroscopic techniques. Finally, the prolonged lifetime and extent of charge separation for these hybrid NCs (or the composites) assisted in the development of a better light harvester as compared to the case of their pure counterparts.
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Affiliation(s)
- Partha Maity
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Mumbai-400085, India.
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22
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Maiti S, Anand P, Azlan F, Dana J, Ghosh HN. Improving the Power-Conversion Efficiency through Alloying in Common Anion CdZnX (X=S, Se) Nanocrystal Sensitized Solar Cells. Chemphyschem 2019; 20:2662-2667. [PMID: 31120604 DOI: 10.1002/cphc.201900379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/20/2019] [Indexed: 11/06/2022]
Abstract
In this paper, we have investigated the possibility of utilizing CdZnS and CdZnSe alloy nanocrystals (NCs) as sensitizers in quantum-dot solar cells (QDSCs). The alloy NCs were synthesized by a high-temperature hot injection method and subsequently characterized through high photoluminescence quantum yield, along with larger size compared to binary NCs. Femtosecond transient absorption measurements revealed long-lived charge carriers in the alloy structure due to more structural rigidity and less defect states. Finally, the solar-cell efficiencies of the CdZnS (CdZnSe) NCs were found to be 3.05 % (3.69 %) as compared to 1.23 % (3.12 %) efficiencies for CdS (CdSe) NCs. Thus, common anion ternary NCs have been successfully utilized for solar-cell assembly and can be helpful for constructing tandem solar cells to harvest the high-energy portion of solar radiation.
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Affiliation(s)
- Sourav Maiti
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Pranav Anand
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Farazuddin Azlan
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Jayanta Dana
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Hirendra N Ghosh
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.,Institute of Nano Science and Technology, Mohali, Punjab, 160062, India
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23
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The conversion of CuInS2/ZnS core/shell structure from type I to quasi-type II and the shell thickness-dependent solar cell performance. J Colloid Interface Sci 2019; 546:276-284. [DOI: 10.1016/j.jcis.2019.03.075] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/22/2019] [Accepted: 03/24/2019] [Indexed: 01/02/2023]
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24
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Chen JS, Li M, Cotlet M. Nanoscale Photoinduced Charge Transfer with Individual Quantum Dots: Tunability through Synthesis, Interface Design, and Interaction with Charge Traps. ACS OMEGA 2019; 4:9102-9112. [PMID: 31459998 PMCID: PMC6648770 DOI: 10.1021/acsomega.9b00803] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/03/2019] [Indexed: 05/29/2023]
Abstract
Semiconducting colloidal quantum dots (QDs) provide an excellent platform for nanoscale charge-transfer studies. Because of their size-dependent optoelectronic properties, which can be tuned via chemical synthesis and of their versatility in surface ligand exchange, QDs can be coupled with various types of acceptors to create hybrids with controlled type (electron or hole), direction, and rate of charge flow, depending on the foreseen application, either solar harvesting, light emitting, or biosensing. This perspective highlights several examples of QD-based hybrids with controllable (tunable) rate of charge transfer obtained by various approaches, including by changing the QD core size and shell thickness by colloidal synthesis, by the insertion of molecular linkers or dielectric spacers between donor and acceptor components. We also show that subjecting QDs to external factors such as electric fields and alternate optical excitation energy is another approach to bias the internal charge transfer between charges photogenerated in the QD core and QD's surface charge traps. The perspective also provides the reader with various examples of how single nanoparticle spectroscopic studies can help in understanding and quantifying nanoscale charge transfer with QDs.
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Affiliation(s)
- Jia-Shiang Chen
- Center
for Functional Nanomaterials, Brookhaven
National Laboratory, Upton, New York 11973, United States
- Department
of Materials Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
| | - Mingxing Li
- Center
for Functional Nanomaterials, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - Mircea Cotlet
- Center
for Functional Nanomaterials, Brookhaven
National Laboratory, Upton, New York 11973, United States
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25
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Insight into the reduction and property of graphene hydrogel for high efficiency composite counter electrodes and solar cells. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.09.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Gualdrón-Reyes AF, Meléndez AM, Tirado J, Mejia-Escobar MA, Jaramillo F, Niño-Gómez ME. Hidden energy levels? Carrier transport ability of CdS/CdS 1-xSe x quantum dot solar cells impacted by Cd-Cd level formation. NANOSCALE 2019; 11:762-774. [PMID: 30566154 DOI: 10.1039/c8nr07073c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In quantum dot sensitized solar cells (QDSSC), a cascade energy level structure controlled by assembly of cadmium-chalcogenide quantum dots can remarkably improve the sunlight harvesting and charge carrier lifetime. Despite the advantages of using co-sensitizers, energy conversion efficiencies are still low. An increased understanding of the causes of the low photoconversion efficiency (PCE) will contribute to the development of a straightforward approach to improve solar cell performance by exploiting co-sensitization. Herein we discuss how an excess of cadmium causes structural disorder and defect levels impacting the PCE of QDSSC devices. Thus, outer CdS1-xSex/inner CdS QD-co-sensitized B,N,F-co-doped-TiO2 nanotubes (BNF-TNT) were prepared. Chalcogenides were deposited by the SILAR method on BNF-TNT, varying the load of CdS as the inner sensitizer, while for CdS1-xSex, five SILAR cycles were used (5-CdS1-xSex), controlling the nominal S/Se molar ratio of the ternary alloy. Cd defects named as Cd-Cd energy levels were observed during CdS sensitization. Although incorporation of outer CdS1-xSex provides a tunable band gap to achieve good band alignment for carrier separation, Cd-Cd energy levels in the sensitizers act as recombination centers, limiting the overall electron flow at the BNF-TNT/CdS/CdS1-xSex interface. A maximum PCE of 2.58% was reached under standard AM 1.5G solar illumination at 100 mW cm-2. Additional limitations of SILAR as a deposition strategy of QDs are also found to influence the PCE of QDSSC.
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Affiliation(s)
- Andrés F Gualdrón-Reyes
- Centro de Investigaciones en Catálisis (CICAT), Universidad Industrial de Santander, Sede UIS Guatiguará, Piedecuesta, Santander, C.P. 681011, Colombia.
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Moroz P, Royo Romero L, Zamkov M. Colloidal semiconductor nanocrystals in energy transfer reactions. Chem Commun (Camb) 2019; 55:3033-3048. [DOI: 10.1039/c9cc00162j] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Excitonic energy transfer is a versatile mechanism by which colloidal semiconductor nanocrystals can interact with a variety of nanoscale species. This feature article will discuss the latest research on the key scenarios under which semiconductor nanocrystals can engage in energy transfer with other nanoparticles, organic fluorophores, and plasmonic nanostructures, highlighting potential technological benefits to be gained from such processes.
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Affiliation(s)
- Pavel Moroz
- Department of Physics and Astronomy
- Bowling Green State University
- Bowling Green
- USA
- The Center for Photochemical Sciences
| | - Luis Royo Romero
- Department of Physics and Astronomy
- Bowling Green State University
- Bowling Green
- USA
| | - Mikhail Zamkov
- Department of Physics and Astronomy
- Bowling Green State University
- Bowling Green
- USA
- The Center for Photochemical Sciences
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28
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Halder G, Ghosh D, Ali MY, Sahasrabudhe A, Bhattacharyya S. Interface Engineering in Quantum-Dot-Sensitized Solar Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10197-10216. [PMID: 29584956 DOI: 10.1021/acs.langmuir.8b00293] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The unique properties of II-VI semiconductor nanocrystals such as superior light absorption, size-dependent optoelectronic properties, solution processability, and interesting photophysics prompted quantum-dot-sensitized solar cells (QDSSCs) as promising candidates for next-generation photovoltaic (PV) technology. QDSSCs have advantages such as low-cost device fabrication, multiple exciton generation, and the possibility to push over the theoretical power conversion efficiency (PCE) limit of 32%. In spite of dedicated research efforts to enhance the PCE, optimize individual solar cell components, and better understand the underlying science, QDSSCs have unfortunately not lived up to their potential due to shortcomings in the fabrication process and with the QDs themselves. In this feature article, we briefly discuss the QDSSC concepts and mechanisms of the charge carrier recombination pathways that occur at multiple interfaces, viz., (i) metal oxide (MO)/QDs, (ii) MO/QDs/electrolyte, and (iii) counter electrode (CE)/electrolyte. The rational strategies that have been developed to minimize/block these charge recombination pathways are elaborated. The article concludes with a discussion of the present challenges in fabricating efficient devices and future prospects for QDSSCs.
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Affiliation(s)
- Ganga Halder
- Department of Chemical Sciences and Centre for Advanced Functional Materials , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , India
| | - Dibyendu Ghosh
- Department of Chemical Sciences and Centre for Advanced Functional Materials , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , India
| | - Md Yusuf Ali
- Department of Chemical Sciences and Centre for Advanced Functional Materials , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , India
| | - Atharva Sahasrabudhe
- Department of Chemical Sciences and Centre for Advanced Functional Materials , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , India
| | - Sayan Bhattacharyya
- Department of Chemical Sciences and Centre for Advanced Functional Materials , Indian Institute of Science Education and Research (IISER) Kolkata , Mohanpur 741246 , India
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29
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Li J, Kuang C, Zhao M, Zhao C, Liu L, Lu F, Wang N, Huang C, Duan C, Jian H, Yao L, Jiu T. Ternary CuZnS Nanocrystals: Synthesis, Characterization, and Interfacial Application in Perovskite Solar Cells. Inorg Chem 2018; 57:8375-8381. [PMID: 29952566 DOI: 10.1021/acs.inorgchem.8b01030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ternary CuZnS nanocrystals (NCs) are synthesized via a facile, scalable, noninjection method at low temperatures for the first time, wherein sodium ascorbate plays the dual roles of reducing agent and capping ligand in the preparation process. These NCs can be dispersed well in a polar solvent like dimethyl sulfoxide, and the average size is ∼4 nm as measured by transmission electron microscopy. The results of X-ray diffraction and X-ray photoelectron spectroscopy indicate that the crystal structure of CuZnS NCs displays covellite CuS-like structure and the Zn element partly occupies the Cu position. Also, the crystal structure of CuZnS NCs is completely converted from a covellite CuS structure into a digenite Cu9S5 structure when the NCs are treated above 350 °C. Moreover, CuZnS NCs demonstrate favorable hole transport properties. When it is employed in MAPbI3-based perovskite solar cells as a hole transport layer, a peak power conversion efficiency of 18.3% is achieved. Simultaneously, the devices based on CuZnS exhibit a remarkably reduced J-V hysteresis. The results indicate that CuZnS is a promising hole transport layer for enhancing perovskite solar cell performance and presents great potential for optoelectronic applications, as well.
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Affiliation(s)
- Jiangsheng Li
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Chaoyang Kuang
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Min Zhao
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Chengjie Zhao
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Le Liu
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Fushen Lu
- Department of Chemistry, College of Science , Shantou University , Shantou 515063 , P. R. China
| | - Ning Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Changshui Huang
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Chenghao Duan
- Department of Chemistry, College of Science , Shantou University , Shantou 515063 , P. R. China
| | - Hongmei Jian
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Lili Yao
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
| | - Tonggang Jiu
- Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , P. R. China
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30
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Duan J, Zhao Y, He B, Tang Q. Efficiency enhancement of bifacial dye-sensitized solar cells through bi-tandem carbon quantum dots tailored transparent counter electrodes. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.057] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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31
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Das TK, Ilaiyaraja P, Sudakar C. Whispering Gallery Mode Enabled Efficiency Enhancement: Defect and Size Controlled CdSe Quantum Dot Sensitized Whisperonic Solar Cells. Sci Rep 2018; 8:9709. [PMID: 29946160 PMCID: PMC6018832 DOI: 10.1038/s41598-018-27969-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 06/13/2018] [Indexed: 11/24/2022] Open
Abstract
A synergetic approach of employing smooth mesoporous TiO2 microsphere (SμS-TiO2)–nanoparticulate TiO2 (np-TiO2) composite photoanode, and size and defect controlled CdSe quantum dots (QD) to achieve high efficiency (η) in a modified Grätzel solar cell, quantum dot sensitized whisperonic solar cells (QDSWSC), is reported. SμS-TiO2 exhibits whispering gallery modes (WGM) and assists in enhancing the light scattering. SμS-TiO2 and np-TiO2 provide conductive path for efficient photocurrent charge transport and sensitizer loading. The sensitizer strongly couples with the WGM and significantly enhances the photon absorption to electron conversion. The efficiency of QDSWSC is shown to strongly depend on the size and defect characteristics of CdSe QD. Detailed structural, optical, microstructural and Raman spectral studies on CdSe QD suggest that surface defects are prominent for size ~2.5 nm, while the QD with size > 4.5 nm are well crystalline with lower surface defects. QDSWSC devices exhibit an increase in η from ≈0.46% to η ≈ 2.74% with increasing CdSe QD size. The reported efficiency (2.74%) is the highest compared to other CdSe based QDSSC made using TiO2 photoanode and I−/I3− liquid electrolyte. The concept of using whispering gallery for enhanced scattering is very promising for sensitized whisperonic solar cells.
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Affiliation(s)
- Tapan Kumar Das
- Multifunctional Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - P Ilaiyaraja
- Multifunctional Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - C Sudakar
- Multifunctional Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India.
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32
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Moroz NA, Bauer C, Williams L, Olvera A, Casamento J, Page AA, Bailey TP, Weiland A, Stoyko SS, Kioupakis E, Uher C, Aitken JA, Poudeu PFP. Insights on the Synthesis, Crystal and Electronic Structures, and Optical and Thermoelectric Properties of Sr1–xSbxHfSe3 Orthorhombic Perovskite. Inorg Chem 2018; 57:7402-7411. [DOI: 10.1021/acs.inorgchem.8b01038] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicholas A. Moroz
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Christopher Bauer
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Logan Williams
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alan Olvera
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Joseph Casamento
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alexander A. Page
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Trevor P. Bailey
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ashley Weiland
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Stanislav S. Stoyko
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Emmanouil Kioupakis
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Ctirad Uher
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jennifer A. Aitken
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Pierre F. P. Poudeu
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
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33
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Wang W, Feng W, Du J, Xue W, Zhang L, Zhao L, Li Y, Zhong X. Cosensitized Quantum Dot Solar Cells with Conversion Efficiency over 12. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:1705746. [PMID: 29359826 DOI: 10.1002/adma.201705746] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/15/2017] [Indexed: 05/28/2023]
Abstract
The improvement of sunlight utilization is a fundamental approach for the construction of high-efficiency quantum-dot-based solar cells (QDSCs). To boost light harvesting, cosensitized photoanodes are fabricated in this work by a sequential deposition of presynthesized Zn-Cu-In-Se (ZCISe) and CdSe quantum dots (QDs) on mesoporous TiO2 films via the control of the interactions between QDs and TiO2 films using 3-mercaptopropionic acid bifunctional linkers. By the synergistic effect of ZCISe-alloyed QDs with a wide light absorption range and CdSe QDs with a high extinction coefficient, the incident photon-to-electron conversion efficiency is significantly improved over single QD-based QDSCs. It is found that the performance of cosensitized photoanodes can be optimized by adjusting the size of CdSe QDs introduced. In combination with titanium mesh supported mesoporous carbon as a counterelectrode and a modified polysulfide solution as an electrolyte, a champion power conversion efficiency up to 12.75% (Voc = 0.752 V, Jsc = 27.39 mA cm-2 , FF = 0.619) is achieved, which is, as far as it is known, the highest efficiency for liquid-junction QD-based solar cells reported.
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Affiliation(s)
- Wei Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Wenliang Feng
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jun Du
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Weinan Xue
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Linlin Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Leilei Zhao
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yan Li
- Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xinhua Zhong
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
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34
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Non-toxic configuration of indium selenide nanoparticles- Cu2ZnSnS2Se2 /carbon fabric in a quasi solid-state solar cell. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.02.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Ding H, Lv J, Wu H, Chai G, Liu A. Enhanced light-harvesting by plasmonic hollow gold nanospheres for photovoltaic performance. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171350. [PMID: 29410838 PMCID: PMC5792915 DOI: 10.1098/rsos.171350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/14/2017] [Indexed: 06/08/2023]
Abstract
A 'sandwich'-structured TiO2NR/HGN/CdS photoanode was successfully fabricated by the electrophoretic deposition of hollow gold nanospheres (HGNs) on the surface of TiO2 nanorods (NRs). The HGNs presented a wide surface plasmon resonance character in the visible region from 540 to 630 nm, and further acted as the scatter elements and light energy 'antennas' to trap the local-field light near the TiO2NR/CdS layer, resulting in the increase of the light harvesting. An outstanding enhancement in the photochemical behaviour of TiO2NR/HGN/CdS photoanodes was attained by the contribution of HGNs in increasing the light absorption and the number of electron-hole pairs of photosensitive semiconductors. The optimized photochemical performance of TiO2NR/HGN/CdS photoanodes by using plasmonic HGNs demonstrated their potential application in energy conversion devices.
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Affiliation(s)
- Hao Ding
- Key Laboratory of E&M, Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Jindian Lv
- Center for Optoelectronics Materials and Devices, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Huaping Wu
- Key Laboratory of E&M, Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Guozhong Chai
- Key Laboratory of E&M, Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Aiping Liu
- Center for Optoelectronics Materials and Devices, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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36
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Peng W, Luo P, Gui D, Jiang W, Wu H, Zhang J. Enhanced anticancer effect of fabricated gallic acid/CdS on the rGO nanosheets on human glomerular mesangial (IP15) and epithelial proximal (HK2) kidney cell lines - Cytotoxicity investigations. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 178:243-248. [DOI: 10.1016/j.jphotobiol.2017.11.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/04/2017] [Accepted: 11/07/2017] [Indexed: 10/18/2022]
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37
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Pan Z, Rao H, Mora-Seró I, Bisquert J, Zhong X. Quantum dot-sensitized solar cells. Chem Soc Rev 2018; 47:7659-7702. [DOI: 10.1039/c8cs00431e] [Citation(s) in RCA: 259] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A comprehensive overview of the development of quantum dot-sensitized solar cells (QDSCs) is presented.
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Affiliation(s)
- Zhenxiao Pan
- College of Materials and Energy
- South China Agricultural University
- Guangzhou 510642
- China
| | - Huashang Rao
- College of Materials and Energy
- South China Agricultural University
- Guangzhou 510642
- China
| | - Iván Mora-Seró
- Institute of Advanced Materials (INAM)
- Universitat Jaume I
- 12006 Castelló
- Spain
| | - Juan Bisquert
- Institute of Advanced Materials (INAM)
- Universitat Jaume I
- 12006 Castelló
- Spain
| | - Xinhua Zhong
- College of Materials and Energy
- South China Agricultural University
- Guangzhou 510642
- China
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38
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Tan L, Liu Y, Mao B, Luo B, Gong G, Hong Y, Chen B, Shi W. Effective bandgap narrowing of Cu–In–Zn–S quantum dots for photocatalytic H2 production via cocatalyst-alleviated charge recombination. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00607a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Effective bandgap narrowing of Cu–In–Zn–S quantum dots is achieved with increased tolerance of Cu from the cocatalyst-alleviated charge recombination.
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Affiliation(s)
- Lili Tan
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Yanhong Liu
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Baodong Mao
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Bifu Luo
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Guan Gong
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Yuanzhi Hong
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Biyi Chen
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Weidong Shi
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
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39
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Istif E, Kagkoura A, Hernandez-Ferrer J, Stergiou A, Skaltsas T, Arenal R, Benito AM, Maser WK, Tagmatarchis N. Self-Assembled Core-Shell CdTe/Poly(3-hexylthiophene) Nanoensembles as Novel Donor-Acceptor Light-Harvesting Systems. ACS APPLIED MATERIALS & INTERFACES 2017; 9:44695-44703. [PMID: 29214807 DOI: 10.1021/acsami.7b13506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The self-assembly of novel core-shell nanoensembles consisting of regioregular poly(3-hexylthiophene) nanoparticles (P3HTNPs) of 100 nm as core and semiconducting CdTe quantum dots (CdTeQDs) as shell with a thickness of a few tens of nanometers was accomplished by employing a reprecipitation approach. The structure, morphology, and composition of CdTeQDs/P3HTNPs nanoensembles were confirmed by high-resolution scanning transmission microscopy and dynamic light-scattering studies. Intimate interface contact between the CdTeQDs shell and the P3HTNPs core leads to the stabilization of the CdTeQDs/P3HTNPs nanoensemble as probed by the steady-state absorption spectroscopy. Effective quenching of the characteristic photoluminescence of CdTeQDs at 555 nm, accompanied by simultaneous increase in emission of P3HTNPs at 660 and 720 nm, reveals photoinduced charge-transfer processes. Probing the redox properties of films of CdTeQDs/P3HTNPs further proves the formation of a stabilized core-shell system in the solid state. Photoelectrochemical assays on CdTeQDs/P3HTNPs films show a reversible on-off photoresponse at a bias voltage of +0.8 V with a 3 times increased photocurrent compared to CdTeQDs. The improved charge separation is directly related to the unique core-shell configuration, in which the outer CdTeQDs shell forces the P3HTNPs core to effectively act as electron acceptor. The creation of novel donor-acceptor core-shell hybrid materials via self-assembly is transferable to other types of conjugated polymers and semiconducting nanoparticles. This work, therefore, opens new pathways for the design of improved optoelectronic devices.
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Affiliation(s)
- Emin Istif
- Instituto de Carboquimica ICB-CSIC , C/Miguel Luesma Castan 4, 50018 Zaragoza, Spain
| | - Antonia Kagkoura
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation , 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | | | - Anastasios Stergiou
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation , 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - Theodosis Skaltsas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation , 48 Vassileos Constantinou Avenue, Athens 11635, Greece
| | - Raul Arenal
- Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon, Universidad de Zaragoza , 50018 Zaragoza, Spain
- ARAID Foundation , 50018 Zaragoza, Spain
| | - Ana M Benito
- Instituto de Carboquimica ICB-CSIC , C/Miguel Luesma Castan 4, 50018 Zaragoza, Spain
| | - Wolfgang K Maser
- Instituto de Carboquimica ICB-CSIC , C/Miguel Luesma Castan 4, 50018 Zaragoza, Spain
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation , 48 Vassileos Constantinou Avenue, Athens 11635, Greece
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40
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Wang L, Chen S, Ding Y, Zhu Q, Zhang N, Yu S. Biofabrication of morphology improved cadmium sulfide nanoparticles using Shewanella oneidensis bacterial cells and ionic liquid: For toxicity against brain cancer cell lines. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 178:424-427. [PMID: 29207279 DOI: 10.1016/j.jphotobiol.2017.11.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/03/2017] [Accepted: 11/05/2017] [Indexed: 10/18/2022]
Abstract
The present work determines the anticancer activity of bio-mediated synthesized cadmium sulfide nanoparticles using the ionic liquid and bacterial cells (Shewanella oneidensis). Bacterial cells have been exposed to be important resources that hold huge potential as ecofriendly, cost-effective, evading toxic of dangerous chemicals and the alternative of conventional physiochemical synthesis. The Shewanella oneidensis is an important kind of metal reducing bacterium, known as its special anaerobic respiratory and sulfate reducing capacity. The crystalline nature, phase purity and surface morphology of biosynthesized cadmium sulfide nanoparticles were analyzed by Fourier transform infrared spectroscopy, X-ray diffraction, Field emission scanning electron microscopy, Energy dispersive spectroscopy and Transmission electron microscopy. The use of imidazolium based ionic liquids as soft templating agent for controlling self-assembly and crystal growth direction of metal sulfide nanoparticles has also advanced as an important method. The microscopic techniques showed that the nanoparticles are designed on the nano form and have an excellent spherical morphology, due to the self-assembled mechanism of ionic liquid assistance. The antitumor efficiency of the cadmium sulfide nanoparticles was investigated against brain cancer cell lines using rat glioma cell lines. The effectively improved nano-crystalline and morphological structure of CdS nanoparticles in the presence of IL exhibit excellent cytotoxicity and dispersion ability on the cell shape is completely spread out showing a nice toxic environment against cancer cells. The cytotoxicity effect of cadmium sulfide nanoparticles was discussed with a diagrammatic representation.
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Affiliation(s)
- Li Wang
- Department of Pharmacy, Jining No.1 People's Hospital, Jining 272011, Shandong, China.
| | - Siyuan Chen
- Department of Pharmacy, Jining No.1 People's Hospital, Jining 272011, Shandong, China
| | - Yiming Ding
- Department of Neurosurgery, China Meitan General Hospital, China
| | - Qiang Zhu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, China
| | - Nijia Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, China
| | - Shuqing Yu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, China.
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41
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Semiconductor quantum dot-sensitized rainbow photocathode for effective photoelectrochemical hydrogen generation. Proc Natl Acad Sci U S A 2017; 114:11297-11302. [PMID: 29073047 DOI: 10.1073/pnas.1712325114] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The present study reports the fabrication of CdSe quantum dot (QD)-sensitized photocathodes on NiO-coated indium tin oxide (ITO) electrodes and their H2-generating ability upon light irradiation. A well-established spin-coating method was used to deposit CdSe QD stock solution onto the surface of NiO/ITO electrodes, thereby leading to the construction of various CdSe QD-sensitized photocathodes. The present report includes the construction of rainbow photocathodes by spin-coating different-sized QDs in a sequentially layered manner, thereby creating an energetically favorable gradient for charge separation. The resulting rainbow photocathodes with forward energetic gradient for charge separation and subsequent electron transfer to a solution-based hydrogen-evolving catalyst (HEC) exhibit good light-harvesting ability and enhanced photoresponses compared with the reverse rainbow photocathodes under white LED light illumination. Under minimally optimized conditions, a photocurrent density of as high as 115 μA⋅cm-2 and a Faradaic efficiency of 99.5% are achieved, which is among the most effective QD-based photocathode water-splitting systems.
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42
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Zhang W, Albero J, Xi L, Lange KM, Garcia H, Wang X, Shalom M. One-Pot Synthesis of Nickel-Modified Carbon Nitride Layers Toward Efficient Photoelectrochemical Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:32667-32677. [PMID: 28871792 DOI: 10.1021/acsami.7b08022] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new method to significantly enhance the photoelectrochemical properties of phenyl-modified carbon nitride layers via the insertion of nickel ions into carbon nitride layers is reported. The nickel ions are embedded within the carbon nitride layers by manipulating the interaction of Ni ions and molten organic molecules at elevated temperature prior to their condensation. A detailed analysis of the chemical and photophysical properties suggests that the nickel ions dissolve in the molten molecules, leading to the homogeneous distribution of nickel atoms within the carbon nitride layers. We found that the nickel atoms can alter the growth mechanism of carbon nitride layers, resulting in extended light absorption, charge transfer properties, and the total photoelectrochemical performance. For the most photoactive electrode, the Ni ions have an oxidation state of 2.8, as confirmed by soft X-ray absorption spectroscopy. Furthermore, important parameters such as absorption coefficient, exciton lifetime, and diffusion length were studied in depth, providing substantial progress in our understanding of the photoelectrochemical properties of carbon nitride films. This work opens new opportunities for the growth of carbon nitride layers and similar materials on different surfaces and provides important progress in our understanding of the photophysical and photoelectrochemical properties of carbon nitride layers toward their implantation in photoelectronic and other devices.
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Affiliation(s)
- Wenyao Zhang
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev , Beer-Sheva 8410501, Israel
- Key Laboratory of Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education , Nanjing 210094, China
- Department of Colloid Chemistry, Max-Planck Institute of Colloids and Interfaces , Research Campus Golm, 14424 Potsdam, Germany
| | - Josep Albero
- Instituto mixto de tecnología química (CSIC-UPV), Universitat Politècnica de València , Avda de los Narajos s/n E-46022, Valencia, Spain
| | - Lifei Xi
- Operando Characterization of Solar Fuel Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 12489 Berlin, Germany
| | - Kathrin M Lange
- Operando Characterization of Solar Fuel Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , 12489 Berlin, Germany
| | - Hermenegildo Garcia
- Instituto mixto de tecnología química (CSIC-UPV), Universitat Politècnica de València , Avda de los Narajos s/n E-46022, Valencia, Spain
| | - Xin Wang
- Key Laboratory of Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education , Nanjing 210094, China
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev , Beer-Sheva 8410501, Israel
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43
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Esparza D, Lopez-Luke T, Oliva J, Cerdán-Pasarán A, Martínez-Benítez A, Mora-Seró I, Rosa EDL. Enhancement of Efficiency in Quantum Dot Sensitized Solar Cells Based on CdS/CdSe/CdSeTe Heterostructure by Improving the Light Absorption in the VIS-NIR Region. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.060] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Kozytskiy AV, Stroyuk OL, Raevskaya AE, Kuchmy SY. Photoelectrochemical Solar Cells with Semiconductor Nanoparticles and Liquid Electrolytes: a Review. THEOR EXP CHEM+ 2017. [DOI: 10.1007/s11237-017-9512-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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Kagkoura A, Skaltsas T, Tagmatarchis N. Transition-Metal Chalcogenide/Graphene Ensembles for Light-Induced Energy Applications. Chemistry 2017; 23:12967-12979. [DOI: 10.1002/chem.201700242] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Antonia Kagkoura
- Theoretical and Physical Chemistry Institute; National Hellenic Research Foundation; 48 Vassileos Constantinou Avenue Athens 11635 Greece
| | - Theodosis Skaltsas
- Theoretical and Physical Chemistry Institute; National Hellenic Research Foundation; 48 Vassileos Constantinou Avenue Athens 11635 Greece
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry Institute; National Hellenic Research Foundation; 48 Vassileos Constantinou Avenue Athens 11635 Greece
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46
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Enhancing the Efficiency of DSSCs by the Modification of TiO 2 Photoanodes using N, F and S, co-doped Graphene Quantum Dots. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.024] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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47
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Matthews PD, McNaughter PD, Lewis DJ, O'Brien P. Shining a light on transition metal chalcogenides for sustainable photovoltaics. Chem Sci 2017; 8:4177-4187. [PMID: 28626562 PMCID: PMC5468987 DOI: 10.1039/c7sc00642j] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 03/13/2017] [Indexed: 01/09/2023] Open
Abstract
Transition metal chalcogenides are an important family of materials that have received significant interest in recent years as they have the potential for diverse applications ranging from use in electronics to industrial lubricants. One of their most exciting properties is the ability to generate electricity from incident light. In this perspective we will summarise and highlight the key results and challenges in this area and explain how transition metal chalcogenides are a good choice for future sustainable photovoltaics.
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Affiliation(s)
- Peter D Matthews
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK . paul.o'
| | - Paul D McNaughter
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK . paul.o'
| | - David J Lewis
- School of Materials , University of Manchester , Oxford Road , Manchester , M13 9PL , UK
| | - Paul O'Brien
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK . paul.o'
- School of Materials , University of Manchester , Oxford Road , Manchester , M13 9PL , UK
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48
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Debnath T, Sebastian D, Maiti S, Ghosh HN. Tuning Hole and Electron Transfer from Photoexcited CdSe Quantum Dots to Phenol Derivatives: Effect of Electron-Donating and -Withdrawing Moieties. Chemistry 2017; 23:7306-7314. [PMID: 28345273 DOI: 10.1002/chem.201700166] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Indexed: 11/09/2022]
Abstract
Charge-transfer processes from photoexcited CdSe quantum dots (QDs) to phenol derivatives with electron- donating (4-methoxy) and -withdrawing (4-nitro) moieties have been demonstrated by using steady-state and time- resolved emission and femtosecond transient absorption spectroscopy. Steady-state and time-resolved emission studies suggest that in the presence of both 4-nitrophenol (4NP) and 4-methoxyphenol (4MP) CdSe QDs luminescence is quenched. Stern-Volmer analysis suggests both static and dynamic mechanisms are active for both the QD/phenol composites. Cyclic voltammetric analysis recommends that photoexcited CdSe QDs can donate electrons to 4NP and holes to 4MP. To reconfirm both electron- and hole-transfer mechanisms, CdSe/CdS quasi-type II and CdSe/CdTe type II core-shell nanocrystals were synthesized and photoluminescence quenching was monitored in the absence and presence of both 4NP and 4MP, for which hole and electron transfer were systematically restricted. Results suggest that indeed electron and hole transfer take place from photoexcited CdSe to 4NP and 4MP, respectively. To monitor the charge-transfer dynamics in both systems on an early timescale, femtosecond transient absorption spectroscopic techniques have been employed. Electron and hole transfer and charge-recombination dynamics are discussed and the effect of electron-donating and -withdrawing groups has been demonstrated.
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Affiliation(s)
- Tushar Debnath
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
| | - Deepa Sebastian
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
| | - Sourav Maiti
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India.,Department of Chemistry, Savitribai Phule Pune University, Pune, 411007, India
| | - Hirendra N Ghosh
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India.,Institute of Nano Science and Technology, Mohali, Punjab, 160062, India
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49
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Arinze ES, Qiu B, Palmquist N, Cheng Y, Lin Y, Nyirjesy G, Qian G, Thon SM. Color-tuned and transparent colloidal quantum dot solar cells via optimized multilayer interference. OPTICS EXPRESS 2017; 25:A101-A112. [PMID: 28241668 DOI: 10.1364/oe.25.00a101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Colloidal quantum dots (CQDs), are a promising candidate material for realizing colored and semitransparent solar cells, due to their band gap tunability, near infrared responsivity and solution-based processing flexibility. CQD solar cells are typically comprised of several optically thin active and electrode layers that are optimized for their electrical properties; however, their spectral tunability beyond the absorption onset of the CQD layer itself has been relatively unexplored. In this study, we design, optimize and fabricate multicolored and transparent CQD devices by means of thin film interference engineering. We develop an optimization algorithm to produce devices with controlled color characteristics. We quantify the tradeoffs between attainable color or transparency and available photocurrent, calculate the effects of non-ideal interference patterns on apparent device color, and apply our optimization method to tandem solar cell design. Experimentally, we fabricate blue, green, yellow, red and semitransparent devices and achieve photocurrents ranging from 10 to 15.2 mA/cm2 for the colored devices. We demonstrate semitransparent devices with average visible transparencies ranging from 27% to 32%, which match our design simulation results. We discuss how our optimization method provides a general platform for custom-design of optoelectronic devices with arbitrary spectral profiles.
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50
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Debnath T, Parui K, Maiti S, Ghosh HN. An Insight into the Interface through Excited-State Carrier Dynamics for Promising Enhancement of Power Conversion Efficiency in a Mn-Doped CdZnSSe Gradient Alloy. Chemistry 2017; 23:3755-3763. [DOI: 10.1002/chem.201605612] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Tushar Debnath
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India), Fax
| | - Kausturi Parui
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India), Fax
| | - Sourav Maiti
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India), Fax
- Department of Chemistry; Savitribai Phule Pune University; Pune 411007 India
| | - Hirendra N. Ghosh
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India), Fax
- Institute of Nano Science and Technology; Mohali Punjab 16062 India
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