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Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells
Shi, Ji-fu1; Huang, Qi-zhang1,2; Shen, Cheng-jia1,3; Zhu, Yan-qing1,2; Xu, Gang1
2016-12-20
Source PublicationACTA POLYMERICA SINICA
Issue12Pages:1735-1742
AbstractPolyvinyl formal (PVF) and polyvinyl butyral (PVB) as polymer frameworks are used to prepare quasi. solid. state electrolytes loaded with I-2 and LiI, which are further applied in dye. sensitized solar cells (DSCs) to improve the stability of DSCs. FTIR spectra, thermodynamic and electrochemical methods are used to characterize the functional group of the polymers and the conductivity of the quasi. solid. state electrolytes. These results show that the oxygen atoms of C = O and O-C-O in the polymers (PVF and PVB) can interact with Li+ of LiI by coordination effect, promoting the ionization of LiI and facilitating the charge transport. Through the comparison between PVF and PVB, it can be also found that the propyl side chain of PVB has positive influence on the thermodynamic and electrochemical performance, where the DSCs with PVB exhibit better photovoltaic performance. By optimizing the composition of electrolytes, the ionic conductivity of PVF and PVB. based quasi. solid. state electrolytes can reach the maximum ionic conductivity of 2.5 mS . cm(-1) (PVF) and 4. 2 mS . cm(-1) (PVB), with the concentration of LiI at 0. 7 mol . L-1. Under this condition, the diffusion. limiting current density of PVF and PVB. based quasi. solid. state electrolytes can achieve 10. 05 mA . cm(-2)(triiodide ionic diffusion constant = 1. 84 x 10(-6) cm(2) . s(-1)) and 17. 89 mA . cm(-2) (triiodide ionic diffusion constant = 3. 23 x 10(-6) cm(2) . s(-1)), respectively. Impedance plots of the quasi. solid. state DSCs reflect that the PVB. based DSCs have a higher charge. transport resistance (R-ct = 118. 9 Omega) than that of PVF. based DSCs (R-ct = 49. 57 Omega) and effectively suppress the dark reaction due to the steric hindrance of the propyl side chain. Eventually, the dye. sensitized solar cells based on these two electrolytes attain satisfactory energy conversion efficiency of 4. 18% (PVF) and 6. 06% (PVB) and excellent long. term stability, which renders only a tiny decline of the efficiency of DSCs and maintain the efficiency of DSCs at above 90% of the original
SubtypeArticle
KeywordPolyvinyl Formal Polyvinyl Butyral Electrolyte Conductivity Dye-sensitized Solar Cell
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.11777/j.issn1000-3304.2016.16188
WOS Subject ExtendedPolymer Science
WOS KeywordPOLYMER GEL ELECTROLYTE ; IONIC LIQUIDS ; ORGANIC-DYES ; STATE ; PERFORMANCE ; COMPOSITE ; DONOR ; FILMS
Indexed BySCI
Language英语
WOS SubjectPolymer Science
WOS IDWOS:000397212400014
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14103
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangdong Key Lab New & Renewable Energy Res & De, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Sci & Technol China, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Shi, Ji-fu,Huang, Qi-zhang,Shen, Cheng-jia,et al. Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells[J]. ACTA POLYMERICA SINICA,2016(12):1735-1742.
APA Shi, Ji-fu,Huang, Qi-zhang,Shen, Cheng-jia,Zhu, Yan-qing,&Xu, Gang.(2016).Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells.ACTA POLYMERICA SINICA(12),1735-1742.
MLA Shi, Ji-fu,et al."Polyvinyl Acetal-based Quasi-Solid-Sate Electrolytes and Their Application in Dye-sensitized Solar Cells".ACTA POLYMERICA SINICA .12(2016):1735-1742.
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