1
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Shaban S, Vats AK, Pandey SS. Bifacial Dye-Sensitized Solar Cells Utilizing Visible and NIR Dyes: Implications of Dye Adsorption Behaviour. Molecules 2023; 28:molecules28062784. [PMID: 36985755 PMCID: PMC10052324 DOI: 10.3390/molecules28062784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/16/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Bifacial dye-sensitized solar cells (DSSCs) were fabricated utilizing dye cocktails of two dyes, Z-907 and SQ-140, which have complementary light absorption and photon harvesting in the visible and near-infrared wavelength regions, for panchromatic photon harvesting. The investigation of the rate of dye adsorption and the binding strengths of the dyes on mesoporous TiO2 corroborated the finding that the Z-907 dye showed a rate of dye adsorption that was about >15 times slower and a binding that was about 3 times stronger on mesoporous TiO2 as compared to SQ-140. Utilizing the dye cocktails Z-907 and SQ-140 from ethanol, the formation of the dye bilayer, which was significantly influenced by the ratio of dyes and adsorption time, was demonstrated. It was demonstrated that the dyes of Z-907 and SQ-140 prepared in 1:9 or 9:1 molar ratios favoured the dye bilayer formation by subtly controlling the adsorption time. In contrast, the 1:1 ratio counterpart was prone to form mixed dye adsorption; the best performance of the BF-DSSCs was shown when a dye cocktail of Z-907 and SQ-140 in a molar 9:1 ratio was used to prepare a photoanode for 1 h of dye adsorption. The BF-DSSCs thus exhibited PCEs of 4.23% and 3.48% upon the front and rear side light illuminations, a cumulated PCE of 7.71%, and a very good BBF of 83%.
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Affiliation(s)
- Suraya Shaban
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4, Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan
| | - Ajendra K Vats
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4, Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan
| | - Shyam S Pandey
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4, Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan
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2
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Huang JF, Lei Y, Luo T, Liu JM. Photocatalytic H 2 Production from Water by Metal-free Dye-sensitized TiO 2 Semiconductors: The Role and Development Process of Organic Sensitizers. CHEMSUSCHEM 2020; 13:5863-5895. [PMID: 32897637 DOI: 10.1002/cssc.202001646] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/28/2020] [Indexed: 06/11/2023]
Abstract
The utilization of solar energy to produce hydrogen from water is showing increased importance and desirability in the field of artificial photosynthesis to produce clean and sustainable fuels. In a typical three-component dye-sensitized semiconductor system for photocatalysis, the dye sensitizer plays an essential role of energy antenna for harvesting visible light and promoting the reduction reaction to generate hydrogen. In recent decades, a lot of attention has focused on metal-free organic sensitizers, which have the advantages of low cost, high molar extinction coefficient, good modifiability and, most importantly, ability to avoid the use of noble metal ions. This Review enumerates the design strategies, specific properties and photocatalytic performances of metal-free sensitizers in the past 30 years and concludes their evolution process. The advantages of different types of metal-free sensitizers are highlighted and the instructively enlightening experiences are systematic summarized.
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Affiliation(s)
- Jian-Feng Huang
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
| | - Yang Lei
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
| | - Teng Luo
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
| | - Jun-Min Liu
- School of Materials Science and Engineering, Sun Yat-sen University, 510275, Guangzhou, P.R. China
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3
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Wang C, Tan J, Zhang X. Structure–reactivity relationship of probes based on the H 2S-mediated reductive cleavage of the CC bond. NEW J CHEM 2020. [DOI: 10.1039/d0nj02307h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The structure–reactivity relationship of H2S-mediated reductive cleavage of CC bond was studied and utilized to develop probes for detecting H2S.
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Affiliation(s)
- Chunfei Wang
- Cancer Centre and Centre of Reproduction
- Development and Aging
- Faculty of Health Sciences, University of Macau
- Taipa
- Macau
| | - Jingyun Tan
- Cancer Centre and Centre of Reproduction
- Development and Aging
- Faculty of Health Sciences, University of Macau
- Taipa
- Macau
| | - Xuanjun Zhang
- Cancer Centre and Centre of Reproduction
- Development and Aging
- Faculty of Health Sciences, University of Macau
- Taipa
- Macau
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4
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Prediction of Absorption Spectrum Shifts in Dyes Adsorbed on Titania. Sci Rep 2019; 9:16983. [PMID: 31740733 PMCID: PMC6861231 DOI: 10.1038/s41598-019-53534-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 11/04/2019] [Indexed: 01/04/2023] Open
Abstract
Dye adsorption on metal-oxide films often results in small to substantial absorption shifts relative to the solution phase, with undesirable consequences for the performance of dye-sensitized solar cells and optical sensors. While density functional theory is frequently used to model such behaviour, it is too time-consuming for rapid assessment. In this paper, we explore the use of supervised machine learning to predict whether dye adsorption on titania is likely to induce a change in its absorption characteristics. The physicochemical features of each dye were encoded as a numeric vector whose elements are the counts of molecular fragments and topological indices. Various classification models were subsequently trained to predict the type of absorption shift i.e. blue, red or unchanged (|Δλ| ≤ 10 nm). The models were able to predict the nature of the shift with a good likelihood (~80%) of success when applied to unseen data.
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5
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Dye-sensitized photocatalytic and photoelectrochemical hydrogen production through water splitting. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2019. [DOI: 10.1007/s12210-019-00824-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Sil MC, Sudhakar V, Singh AK, Kavungathodi MFM, Nithyanandhan J. Homo- and Heterodimeric Dyes for Dye-Sensitized Solar Cells: Panchromatic Light Absorption and Modulated Open Circuit Potential. Chempluschem 2018; 83:998-1007. [PMID: 31950728 DOI: 10.1002/cplu.201800450] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Indexed: 11/11/2022]
Abstract
The design of dyes for panchromatic light absorption has attracted much attention in the field of dye-sensitized solar cells (DSSCs). An approach to enhance panchromatic light absorption utilizes mixtures of complementary light-absorbing dyes as well as dyes with specific anchoring groups that facilitate interfacial charge transfer with TiO2 . Dipole-dipole interactions between the dye molecules on the surface broaden the spectrum, which results in decreased DSSC device performance. However, controlled aggregation of dyes results in broadening the spectral profile along with enhanced photocurrent generation. To control the dye-dye interaction, dimeric dyes with different dipole lengths D1 -Dsq , Dsq -Dsq were systematically designed and synthesized. The photophysical and electrochemical properties were evaluated and the EHOMO and ELUMO levels were determined; these energy levels determines the electron injection from ELUMO of the dye to ECB of TiO2 and regeneration of oxidized dye by the electrolyte, respectively. The absorption spectra of Dsq -Dsq , D1 -Dsq were broadened in solution compared to model dye Dsq ; this indicates that the dye-dye interaction is prominent in solution. In D1 -Dsq excitation energy transfer between photoexcited D1 and Dsq was explained by using Förster resonance energy transfer (FRET). The homodimeric dye showed a device performace of 2.8 % (Voc 0.607, Jsc 6.62 mA/cm2 , ff 69.3 %),whereas the heterodimeric dye D1 -Dsq showed a device performance of 3.9 % (Voc 0.652 V, Jsc 8.89 mA/cm2 , ff 68.8 %). The increased photocurrent for D1 -Dsq is due to the panchromatic IPCE response compared to Dsq -Dsq . The increased Voc is due to the effective passivation of the TiO2 surface by the spirolinker, and the effective dipole moment that shifts the conduction band on TiO2 . Hence, the open circuit potential, Voc , for the devices prepared from Dsq , D1 -Dsq and Dsq -Dsq were systematically modulated by controlling the intermolecular π-π and intramolecular dipole-dipole interactions of the dimeric dyes.
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Affiliation(s)
- Manik Chandra Sil
- Physical and Materials Chemistry Division CSIR-National Chemical Laboratory, CSIR Network of Institutes for Solar Energy, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
| | - Vediappan Sudhakar
- Physical and Materials Chemistry Division CSIR-National Chemical Laboratory, CSIR Network of Institutes for Solar Energy, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
| | - Ambarish Kumar Singh
- Physical and Materials Chemistry Division CSIR-National Chemical Laboratory, CSIR Network of Institutes for Solar Energy, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
| | - Munavvar Fairoos Mele Kavungathodi
- Physical and Materials Chemistry Division CSIR-National Chemical Laboratory, CSIR Network of Institutes for Solar Energy, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Jayaraj Nithyanandhan
- Physical and Materials Chemistry Division CSIR-National Chemical Laboratory, CSIR Network of Institutes for Solar Energy, Dr. Homi Bhabha Road, Pune, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110025, India
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7
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Ramasamy S, Gopi P, Raju S, Kathavarayan S. Comparative analysis of fluorene and carbazole fused triphenylamine sensitizer donor units with new anchoring mode in dye-sensitized solar cells. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2017.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Prakash G, Subramanian K. Interaction of pyridine π-bridge-based poly(methacrylate) dyes for the fabrication of dye-sensitized solar cells with the influence of different strength phenothiazine, fluorene and anthracene sensitizers as donor units with new anchoring mode. NEW J CHEM 2018. [DOI: 10.1039/c8nj04068k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and low-cost approach for the synthesis of three novel propeller-shaped (D2)–π–A type organic polymer dyes has been developed; a new acceptor and π-bridge (PYN) were used to tune the photoelectric properties: DFT studies.
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Affiliation(s)
- Gopi Prakash
- Department of Chemistry
- Anna University
- Chennai-600025
- India
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9
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Push-Pull N-Annulated Perylene-Based Sensitizers for Dye-Sensitized Solar Cells: Theoretical Property Tuning by DFT/TDDFT. ChemistrySelect 2017. [DOI: 10.1002/slct.201701717] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Nagane S, Ichake A, Agrawal I, Sadhanala A, Friend RH, Ogale S, Wadgaonkar PP. Phenothiazine-Based D-A-π-A Dyes for Highly Efficient Dye-Sensitized Solar Cells: Effect of Internal Acceptor and Non-Conjugated π-Spacer on Device Performance. Chempluschem 2017; 82:280-286. [PMID: 31961550 DOI: 10.1002/cplu.201600492] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Indexed: 11/09/2022]
Abstract
Three new D-A-π-A metal-free organic dyes based on phenothiazine as a donor (D) and non-conjugated π-spacer were designed and synthesized. The incorporation of different 'internal acceptors' (electron traps) such as benzothiadiazole (BTD), benzotriazole (BTA), and pyridine were shown to allow systematic tuning of the energy levels and the photophysical properties. The AI-1 dye showed lower electronic disorder compared with the other two dyes. The efficiencies achieved with AI-1, AI-2, and AI-3 dyes were 8.5 % (Jsc =15.42 mA cm-2 , Voc =0.78 V, FF=68 %), 7 % (Jsc =12.8 mA cm-2 , Voc =0.78 V, FF=68 %) and 6.7 % (Jsc =11.57 mA cm-2 , Voc =0.82 V, FF=68.26 %), respectively. The incorporation of non-conjugated phenothiazine as a π-spacer in D-A-π-A dyes showed remarkable enhancement in the photovoltaic performance of dye-sensitized solar cell (DSSC) devices. The sealed DSSC devices with iodide/tri-iodide (I- /I3 - )-based liquid electrolyte showed promising stability under ambient conditions.
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Affiliation(s)
- Satyawan Nagane
- Centre of Excellence in Solar Energy, Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, Maharashtra, India.,Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India
| | - Amol Ichake
- Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110 001, India.,Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, Maharashtra, India
| | - Ishita Agrawal
- Centre of Excellence in Solar Energy, Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, Maharashtra, India
| | - Aditya Sadhanala
- Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Richard H Friend
- Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Satishchandra Ogale
- Centre of Excellence in Solar Energy, Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, Maharashtra, India.,Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pune, 411 008, Maharashtra, India
| | - Prakash P Wadgaonkar
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune, 411008, Maharashtra, India
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11
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Luo J, Wan Z, Jia C, Wang Y, Wu X, Yao X. Co-sensitization of Dithiafulvenyl-Phenothiazine Based Organic Dyes with N719 for Efficient Dye-Sensitized Solar Cells. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.175] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Cecconi B, Manfredi N, Montini T, Fornasiero P, Abbotto A. Dye-Sensitized Solar Hydrogen Production: The Emerging Role of Metal-Free Organic Sensitizers. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600653] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bianca Cecconi
- Department of Materials Science; Solar Energy Research Center MIB-SOLAR and INSTM Milano-Bicocca Research Unit; University of Milano-Bicocca; Via Cozzi 55 20125 Milano Italy
| | - Norberto Manfredi
- Department of Materials Science; Solar Energy Research Center MIB-SOLAR and INSTM Milano-Bicocca Research Unit; University of Milano-Bicocca; Via Cozzi 55 20125 Milano Italy
| | - Tiziano Montini
- Department of Chemical and Pharmaceutical Sciences; ICCOM-CNR Trieste Research Unit and INSTM Trieste Research Unit; University of Trieste; Via L. Giorgieri 1 34127 Trieste Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences; ICCOM-CNR Trieste Research Unit and INSTM Trieste Research Unit; University of Trieste; Via L. Giorgieri 1 34127 Trieste Italy
| | - Alessandro Abbotto
- Department of Materials Science; Solar Energy Research Center MIB-SOLAR and INSTM Milano-Bicocca Research Unit; University of Milano-Bicocca; Via Cozzi 55 20125 Milano Italy
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13
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Zhao NJ, Zhang MJ, Liang R, Fu LM, Zhang W, Ai XC, Hou JH, Zhang JP. Dependence of Excited-State Properties of a Low-Bandgap Photovoltaic Copolymer on Side-Chain Substitution and Solvent. CHEMSUSCHEM 2016; 9:1623-1633. [PMID: 27226175 DOI: 10.1002/cssc.201501690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 04/23/2016] [Indexed: 06/05/2023]
Abstract
The excited-state properties and chain conformations of a new low-bandgap copolymer based on benzo[1,2-b:4,5-b']dithiophene (BDT) and thieno[3,4-b]thiophene with meta-alkoxyphenyl-substituted side chains in solution were investigated comprehensively. Time-resolved spectroscopy suggested that the excited-state properties were sensitive to the conformations of the copolymer in solution. In addition, excited-state dynamics analyses revealed the photogeneration of triplet excited states by intersystem crossing (ISC) at a rate constant of ∼0.4×10(9) s(-1) as a result of direct meta-alkoxyphenyl connection to the donor unit BDT irrespective to the macromolecular conformations. According to El-Sayed's rule, the fast ISC herein is correlated with the change of orbital types between singlet and triplet excited states as also shown by quantum chemical calculations. Our studies may shed light on the structure-property relationships of photovoltaic materials.
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Affiliation(s)
- Ning-Jiu Zhao
- Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China
| | - Mao-Jie Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, P.R. China
| | - Ran Liang
- Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China
| | - Li-Min Fu
- Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China
| | - Wei Zhang
- Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China
| | - Xi-Cheng Ai
- Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China
| | - Jian-Hui Hou
- State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, P.R. China
| | - Jian-Ping Zhang
- Department of Chemistry, Renmin University of China, Beijing, 100872, P.R. China.
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14
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Zhang Y, Sun Z, Cheng S, Yan F. Plasmon-Induced Broadband Light-Harvesting for Dye-Sensitized Solar Cells Using a Mixture of Gold Nanocrystals. CHEMSUSCHEM 2016; 9:813-819. [PMID: 27110902 DOI: 10.1002/cssc.201600110] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 06/05/2023]
Abstract
The efficiency of dye-sensitized solar cells (DSSCs) is generally limited by the mismatch between the absorption spectrum of the photosensitizer and the solar irradiation spectrum. This work describes the use of a mixture that containing proper proportions of SiO2 coated Au nanospheres (AuNSs@SiO2 ) and Au nanorods (AuNRs@SiO2 ) (the mixture was denoted as AuNCs@SiO2 ) to enhance the sunlight utility in DSSCs. The incorporation of AuNCs@SiO2 into the TiO2 photoanode induced broadband light-harvesting at both low- and long- wavelengths and thus enhanced the photocurrent compared to that of plasmonic solar cells based on either AuNSs@SiO2 or AuNRs@SiO2 . Upon the doping of AuNCs@SiO2 , the overall power conversion efficiency (PCE) increased from 7.39 to 9.12 % for DSSCs based on organic liquid electrolytes.
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Affiliation(s)
- Ye Zhang
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Zhe Sun
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Si Cheng
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China.
| | - Feng Yan
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China.
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15
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Cecconi B, Manfredi N, Ruffo R, Montini T, Romero-Ocaña I, Fornasiero P, Abbotto A. Tuning Thiophene-Based Phenothiazines for Stable Photocatalytic Hydrogen Production. CHEMSUSCHEM 2015; 8:4216-4228. [PMID: 26610281 DOI: 10.1002/cssc.201501040] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/04/2015] [Indexed: 06/05/2023]
Abstract
Dibranched donor-(π-acceptor)2 dyes, where phenothiazine is the donor core, cyanoacrylic acid is the acceptor/anchoring group, and π is represented by mono- and poly-cyclic simple and fused thiophene derivatives, were tested as photosensitizers in the photocatalytic production of H2 , in combination with a Pt/TiO2 catalyst. The optical and electrochemical properties of the dyes were investigated, showing that careful design of the thiophene-based π spacer afforded enhanced optical properties. In the H2 production over 20 h, the new thiophene-based sensitizers revealed improved stability after longer irradiation times and enhanced performances, in terms of H2 production rates and light-to-fuel efficiencies, after an initial activation period, which were for the first time associated with enhanced stability under photocatalytic production of H2 and the absence of critical dye degradation.
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Affiliation(s)
- Bianca Cecconi
- Department of Materials Science, Solar Energy Research Center MIB-SOLAR, INSTM Milano-Bicocca Research Unit, University of Milano-Bicocca, Via Cozzi 55, 20125, Milano, Italy
| | - Norberto Manfredi
- Department of Materials Science, Solar Energy Research Center MIB-SOLAR, INSTM Milano-Bicocca Research Unit, University of Milano-Bicocca, Via Cozzi 55, 20125, Milano, Italy
| | - Riccardo Ruffo
- Department of Materials Science, Solar Energy Research Center MIB-SOLAR, INSTM Milano-Bicocca Research Unit, University of Milano-Bicocca, Via Cozzi 55, 20125, Milano, Italy
| | - Tiziano Montini
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR Trieste Research Unit, INSTM Trieste Research Unit, University of Trieste, Via L.Giorgieri 1, 34127, Trieste, Italy
| | - Ismael Romero-Ocaña
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR Trieste Research Unit, INSTM Trieste Research Unit, University of Trieste, Via L.Giorgieri 1, 34127, Trieste, Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR Trieste Research Unit, INSTM Trieste Research Unit, University of Trieste, Via L.Giorgieri 1, 34127, Trieste, Italy.
| | - Alessandro Abbotto
- Department of Materials Science, Solar Energy Research Center MIB-SOLAR, INSTM Milano-Bicocca Research Unit, University of Milano-Bicocca, Via Cozzi 55, 20125, Milano, Italy.
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16
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Photo-stable substituted dihydroindolo[2,3-b]carbazole-based organic dyes: tuning the photovoltaic properties by optimizing the π structure for panchromatic DSSCs. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.08.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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