基于薄膜电极溶胶修饰的染料敏化太阳电池光电特性研究

徐炜炜; 胡林华; 罗向东; 刘培生; 戴松元

doi:10.7498/aps.61.088801

摘要

染料敏化太阳电池(DSC)中的纳米薄膜电极是决定太阳电池光电转换性能的重要组成部分. 为改善薄膜电极特性, 采用了不同浓度的TiO2溶胶对DSC光阳极导电玻璃和纳米TiO2多孔薄膜进行不同方式的界面处理. 利用X射线衍射方法对制备得到的多孔薄膜以及溶胶经高温处理后致密层中纳米TiO2颗粒的尺寸及晶型进行了测试. 采用高分辨透射电子显微镜和场发射扫描电子显微镜观察了纳米颗粒及薄膜微结构形貌. 采用强度调制光电流谱/光电压谱分析了TiO2溶胶的不同处理方式对电子传输和复合的影响. 在100 mWcm-2光强以及暗环境下分别测试了DSC的伏安输出性能以及暗电流. 结果表明, 不同浓度和处理方式均能较好地抑制暗电流. 溶胶处理后光生电子寿命n延长, 电子传输平均时间d相应缩短. 采用浓度为0.10 molL-1的溶胶对导电玻璃和多孔膜同时处理, DSC的宏观输出特性最佳, 短路电流密度Jsc提高了10.9%, 光电转换效率提高了11.9%.

关键词:

Abstract

Nanoporous film electrode is a crucial composition of dye-sensitized solar cells, which influences the photoelectric conversion performance. To improve the property of the photoelectrode, different modification methods by using different concentrations of TiO2 sol are investigated. The crystallite size and phase of the nanoporous TiO2 particles and the TiO2 sol after sintering are studied with X-ray diffraction. The microstructure morphologies of the conductive glass and the films are determined by the high resolution transmission electron microscopy and the field emission scanning electron microscopy. The influences on electron lifetime n and the electron transit time d are analyzed by intensity-modulated photocurrent spectroscopy and photovoltage spectroscopy from the mechanisms of electron transport and back reaction kinetics. It is found that the back reactions are well suppressed under dark conditions after sol modifications. n is effectively extended and d is also shorten correspondingly by any kind of sol treatment. The short-current density and the photoelectric conversion efficiency are increased by 10.9% and 11.9% separately, when 0.10 molL-1 sol modification is applied both to the conductive glass and to the nanoporous TiO2 film at the same time.

Keywords:

作者及机构信息

1.
南通大学杏林学院, 南通 226019;

2.
中国科学院等离子体物理研究所, 中国科学院新型薄膜太阳电池重点实验室, 合肥 230031

基金项目: 国家重点基础研究发展计划(批准号: 2011CBA00700)、江苏省高等学校自然科学基础研究计划重大项目(批准号: 08KJA510002, 10KJA140043)、中国科学院新型薄膜太阳电池重点实验室基金(批准号: KF201106)和南通大学杏林学院科研基金(批准号: 2010K122)资助的课题.

Authors and contacts

1.
Xinglin College, Nantong University, Nantong 226019, China;

2.
Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CBA00700), the Major Program of Natural Science Basic Research of Institution of Higher Education of Jiangsu Province, China (Grant Nos. 08KJA510002, 10KJA140043), the Foundation of Key Laboratory of Novel Thin Film Solar Cells, Chinese Academy of Sciences (Grant No. KF201106), and the Scientific Research Foundation of Xinglin College, Nantong University, China (Grant No. 2010K122).

参考文献

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[22]	Peter L M, Wijayantha K G U 2000 Electrochim. Acta 45 4543
[23]	Kern R, Sastrawan R, Ferber J, Stangl R, Luther J 2002 Electrochim. Acta 47 4213

施引文献

[1]	O'Regan B, Gräztel M 1991 Nature 353 737
[2]	Bach U, Lupo D, Comte P, Moser J E, Weissörtel F, Salbeck J, Spreitzer H, Grätzel M 1998 Nature 395 583
[3]	Grätzel M 2004 J. Photochem. Photobiol. A 164 3
[4]	Gao F F, Wang Y, Zhang J, Shi D, Wang M K, Humphry-Baker R, Wang P, Zakeeruddin S M, Gräztel M 2008 Chem. Commun. 23 2635
[5]	Huang Y, Dai S Y, Cheng S H, Hu L H, Kong F T, Kou D X, Jiang N Q 2010 Acta Phys. Sin. 59 643 (in Chinese) [黄阳, 戴松元, 陈双宏, 胡林华, 孔凡太, 寇东星, 姜年权 2010 59 643]
[6]	Chen C Y, Wang M, Li J Y, Pootrakulchote N, Alibabaei L, Ngocle C H, Decoppet J D, Tsai J H, Grätzel C, Wu C G, Zakeeruddin S M, Gräztel M 2009 ACS Nano 3 3103
[7]	Dai S Y, Wang K J, Weng J, Sui Y F, Huang Y, Xiao S F, Chen S H, Hu L H, Kong F T, Pan X, Shi C W, Guo L 2005 Sol. Energy Mater. Sol. Cells 85 447
[8]	Frank A J, Kopidakis N, Van de Lagemaat J 2004 J. Coord. Chem. Rev. 248 1165
[9]	Ito S, Liska P, Comte P, Charvet R, Péchy P, Bach U, Schmidt-Mende L, Zakeeruddin S M, Kay A, Nazeeruddin M K, Grätzel M 2005 Chem. Commun. 14 4351
[10]	Van de Lagemaat J, Park N G, Frank A J 2000 J. Phys. Chem. B 104 2044
[11]	Pichot F, Ferrere S, Fields C L, Gregg B A 2001 J. Phys. Chem. B 105 1422
[12]	Kay A, Gräztel M 2002 Chem. Mater. 14 2930
[13]	Han L, Koide N, Chiba Y, Islam A, Mitate T 2006 C. R. Chimie 9 645
[14]	Chen D P, Zang X D, Wei C C, Liu C C, Zhao Y 2011 Acta Phys. Chim. Sin. 27 425 (in Chinese) [陈东坡, 张晓丹, 魏长春, 刘彩池, 赵颖 2011 物理化学学报 27 425]
[15]	Hao S C, Wu J H, Fan L Q, Huang Y F, Lin J M, Wei Y L 2004 Sol. Energy 76 745
[16]	Xu W W, Dai S Y, Fang X Q, Hu L H, Kong F T, Pan X, Wang K J 2005 Acta Phys. Sin. 54 5943 (in Chinese) [徐炜炜, 戴松元, 方霞琴, 胡林华, 孔凡太, 潘旭, 王孔嘉 2005 54 5943]
[17]	Yang S M, Huang Y Y, Huang C H, Zhao X S 2002 Chem. Mater. 14 1500
[18]	Xu W W, Dai S Y, Hu L H, Liang L Y, Wang K J 2006 Chin. Phys. Lett. 23 2288
[19]	Hu L H, Dai S Y, Wang K J 2005 Acta Phys. Sin. 54 1914 (in Chinese) [胡林华, 戴松元, 王孔嘉 2005 54 1914]
[20]	Dai S Y, Kong F T, Hu L H, Shi C W, Fang X Q, Pan X, Wang K J 2005 Acta Phys. Sin. 54 1919 (in Chinese) [戴松元, 孔凡太, 胡林华, 史成武, 方霞琴, 潘旭, 王孔嘉 2005 54 1919]
[21]	Stathatos E, Lianos P, Zakeeruddin S M, Liska P, Gräztel M 2003 Chem. Mater. 15 1825
[22]	Peter L M, Wijayantha K G U 2000 Electrochim. Acta 45 4543
[23]	Kern R, Sastrawan R, Ferber J, Stangl R, Luther J 2002 Electrochim. Acta 47 4213

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