纳米TiO2叶片状阵列电极的制备及其在染料敏化太阳电池中电子的输运性能

哈日巴拉; 师兰; 姜磊; 郭金毓; 原光瑜; 王李波; 刘宗瑞

doi:10.7498/aps.60.088101

摘要

在低温条件下采用定向刻蚀技术, 对金属Ti片表面用H2O2溶液进行刻蚀氧化, 制备了垂直生长的纳米TiO2叶片状阵列薄膜电极. 通过X射线衍射分析表明, 纳米TiO2叶片状阵列薄膜经500 ℃下烧结1 h后, 从无定型转变为锐钛矿相. 场发射扫描电子显微镜观察表明: 在80 ℃下的H2O2溶液刻蚀氧化, 经1 d制备得到的是Ti片表面垂直生长的叶片状阵列, 其形貌均匀且完整地

关键词:

Lamina-shape TiO2 nanoarrays (LTNA) film electrode which is vertically grown on the surface of a Ti sheet by the means of hydrogen peroxide oriented etching at low temperature. X-ray diffraction shows that amorphous phase transforms to highly-crystalline anatase phase of the LTNA film after having been calcined at 500 ℃ for 1 h. Field emission scanning electron microscope exhibits a vertically oriented lamina-shape array with the morphology uniformly distributed and perfectly coated on the surface of Ti sheet, and the average height (film thickness), width and thickness of the leave are 1.35 m, 3080 nm and 1015 nm respectively, after 1 d etching in hydrogen peroxide at 80 ℃. The LTNA electrodes exhibit similar morphologies except for the film with a thickness of 2.12 m by hydrogen peroxide etching for 2 d. Using the LTNA film electrode as photoanode based on dye C106 fabricate back-illumination type dye-sensitized solar cell (DSC), a power conversion efficiency can reach 3.2% under an irradiation of air mass 1.5 global (100 mWcm-2) simulated sunlight. Mesoporous TiO2 films are also used in the fabrication of DSC under similar conditions. The devices are compared with each other by transient photoelectric attenuation and electrical impedance technique. The results demonstrate that the LTNA-electrode DSC has a much lower recombination rate and a longer electron life time.

Keywords:

作者及机构信息

1.
内蒙古民族大学化学化工学院, 通辽 028043;

2.
河南理工大学材料科学与工程学院, 焦作 454003

基金项目: 国家自然科学基金(批准号: 60877028)和中国博士后科学基金(批准号: 20070420952)资助的课题.

Authors and contacts

1.
College of Chemistry and Chemical Engineering, Inner Mongolia University for the Nationalities, Tongliao 028043, China;

2.
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China

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施引文献

[1]	ORegan B, Grtzel M 1991 Nature 353 737
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[5]
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[7]
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[9]
[10]
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[12]	Chiba Y, Islam A, Watanabe Y, Komiya R, Koide N, Han L 2006 Jpn. J. Appl. Phys. 45 L638
[13]
[14]	Gao F, Wang Y, Shi D, Zhang J, Wang M, Jing X, Humphry-Baker R, Wang P, Zakeeruddin S, Grtzel M 2008 J. Am. Chem. Soc. 130 10720
[15]
[16]
[17]	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]
[18]
[19]	Li Z H, Wang D J, Wang P, Lin Y H, Zhang Q L, Yang M 2005 Chem. Phys. Lett. 411 511
[20]
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[22]
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[24]
[25]	Hong X, Du L, Ye M, Weng Y 2004 Chin. Phys. 13 720
[26]
[27]	Sommeling P, Oregan B, Haswell R, Smit H, Bakker N, Smits J, Kroon J, Roosmalen J 2006 J. Phys. Chem. B 110 19191
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[44]
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[47]
[48]	Mor G, Varghese O, Paulose M, Shankar K, Grimes C 2006 Sol. Energy Mater. Sol. Cells 90 2011
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[50]	Liu B, Aydil E 2009 J. Am. Chem. Soc. 131 3985
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[53]
[54]
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[56]
[57]	ORegan B, Durrant J, Sommeling P, Bakker N 2007 J. Phys. Chem. C 111 14001
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[59]	Wang P, Zakeeruddin S, Comte P, Charvet R, Humphry-Baker R, Grtzel M 2003 J. Phys. Chem. B 107 14336

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