Influence of 4-tert-butylpyridine/guanidinium thiocyanate co-additives on band edge shift and recombination of dye-sensitized solar cells: experimental and theoretical aspects
文献类型：期刊论文
| 作者 | Wang, Yuqiao1; Lu, Jing1; Yin, Jie1; Lue, Gang2; Cui, Yingmin2; Wang, Shasha1; Deng, Shengyuan3; Shan, Dan3; Tao, Hailiang4; Sun, Yueming1 |
| 刊名 | ELECTROCHIMICA ACTA
 |
| 出版日期 | 2015-12-10 |
| 卷号 | 185页码:69-75 |
| 关键词 | Additive Band shift Recombination Charge transfer Theoretical calculation Dye-sensitized solar cell |
| 英文摘要 | The co-additives of 4-tert-butylpyridine (TBP) and guanidinium thiocyanate (GuSCN) in electrolytes can prominently affect the photovoltaic behavior of dye-sensitized solar cell (DSSC) due to their advantages fitting with energy levels and charge transfer. Mott-Schottky analysis is used to quantify the TiO2 band edge movement to clarify the change of open-circuit voltage. The corresponding kinetic investigations are carried out using cyclic voltammetry, electrochemical impedance spectroscopy, intensity modulated photocurrent/photovoltage spectroscopy and charge extraction. Theoretically, the density functional theory (DFT) method is performed to explore the details of the adsorption, including the interacting energy, Fermi energy and frontier orbitals properties. The results show that the frontier orbitals between TBP and TiO2 are sufficiently overlapped to induce the negative shift of Fermi energy, increasing the open-circuit voltage. The Gu(+) cations can be tightly absorbed on TiO2 surface to by electrostatic attraction form a passivated layer due to the Coulomb attraction, depressing the recombination rate and improving the short-circuit photocurrent. The different proportion of TBP and GuSCN would produce a competitive effect, which would be caused by their volume and electrostatic effect. The photovoltaic performance might be as a result of a synergistic effect of co-additives. DSSC based on the optimal molar ratio (9: 1) of TBP and GuSCN achieves its optimized short-circuit current density of 13.74 mA cm(-2), open-circuit voltage of 0.74 V, fill factor of 0.70 and overall efficiency of 7.12%. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Electrochemistry |
| 研究领域[WOS] | Electrochemistry |
| 关键词[WOS] | NANOCRYSTALLINE TIO2 ; CHARGE RECOMBINATION ; ELECTRON-TRANSPORT ; HIGH-PERFORMANCE ; IN-SITU ; DYNAMICS ; DENSITY ; ADSORPTION ; EFFICIENCY ; INTERFACE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000366018700009 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/112316]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.Southeast Univ, Jiangsu Optoelect Funct Mat & Engn Lab, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China 2.North China Elect Power Univ, Dept Math & Phys, Baoding 071003, Peoples R China 3.Nanjing Univ Sci & Technol, Sch Enviromental & Biol Engn, Nanjing 210094, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yuqiao,Lu, Jing,Yin, Jie,et al. Influence of 4-tert-butylpyridine/guanidinium thiocyanate co-additives on band edge shift and recombination of dye-sensitized solar cells: experimental and theoretical aspects[J]. ELECTROCHIMICA ACTA,2015,185:69-75. |
| APA | Wang, Yuqiao.,Lu, Jing.,Yin, Jie.,Lue, Gang.,Cui, Yingmin.,...&Sun, Yueming.(2015).Influence of 4-tert-butylpyridine/guanidinium thiocyanate co-additives on band edge shift and recombination of dye-sensitized solar cells: experimental and theoretical aspects.ELECTROCHIMICA ACTA,185,69-75. |
| MLA | Wang, Yuqiao,et al."Influence of 4-tert-butylpyridine/guanidinium thiocyanate co-additives on band edge shift and recombination of dye-sensitized solar cells: experimental and theoretical aspects".ELECTROCHIMICA ACTA 185(2015):69-75. |
入库方式： OAI收割
来源：工程热物理研究所
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