中国科学院工程热物理研究所机构知识库
Advanced  
ETP OpenIR  > 中国科学院工程热物理所(论文库)  > 期刊论文(SCI)
Title: Influence of 4-tert-butylpyridine/guanidinium thiocyanate co-additives on band edge shift and recombination of dye-sensitized solar cells: experimental and theoretical aspects
Author: Wang, Yuqiao1; Lu, Jing1; Yin, Jie1; Lue, Gang2; Cui, Yingmin2; Wang, Shasha1; Deng, Shengyuan3; Shan, Dan3; Tao, Hailiang4; Sun, Yueming1
Source: ELECTROCHIMICA ACTA
Issued Date: 2015-12-10
Volume: 185, Pages:69-75
Keyword: Additive ; Band shift ; Recombination ; Charge transfer ; Theoretical calculation ; Dye-sensitized solar cell
DOI: 10.1016/j.electacta.2015.10.103
DOC Type: Article
English Abstract: 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 Headings: Science & Technology ; Physical Sciences
WOS Subject: Electrochemistry
WOS Subject Extended: Electrochemistry
WOS Keyword Plus: NANOCRYSTALLINE TIO2 ; CHARGE RECOMBINATION ; ELECTRON-TRANSPORT ; HIGH-PERFORMANCE ; IN-SITU ; DYNAMICS ; DENSITY ; ADSORPTION ; EFFICIENCY ; INTERFACE
Indexed Type: SCI
Funder: National Natural Science Foundation of China(21173042) ; National Basic Research Program of China(2013CB932902) ; Fundamental Research Funds for the Central Universities(2242014K10025 ; Natural Science Foundation of Jiangsu(BK20141338) ; Seminar Funds of Southeast University(1107041501) ; Practice Innovation Program for Graduate Students of Jiangsu Province(SJLX150047) ; 3207045419)
Language: 英语
WOS ID: WOS:000366018700009
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112316
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

Files in This Item:

There are no files associated with this item.


description.institution: 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
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Wang, Yuqiao]'s Articles
[Lu, Jing]'s Articles
[Yin, Jie]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wang, Yuqiao]‘s Articles
[Lu, Jing]‘s Articles
[Yin, Jie]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院工程热物理研究所 - Feedback
Powered by CSpace