物理化学学报 >> 2014, Vol. 30 >> Issue (3): 446-452.doi: 10.3866/PKU.WHXB201401022

电化学和新能源 上一篇    下一篇

基于TiO2纳米管阵列的高效正面透光型染料敏化太阳能电池的制备及其光电性能

高素雯1, 兰章1,2,3, 吴晚霞1, 阙兰芳1, 吴季怀1,2,3, 林建明1,2,3, 黄妙良1,2,3   

  1. 1 华侨大学材料科学与工程学院, 福建厦门 361021;
    2 环境友好功能材料教育部工程中心, 福建厦门 361021;
    3 福建省高等教育功能材料重点实验室, 福建厦门 361021
  • 收稿日期:2013-11-15 修回日期:2013-12-31 发布日期:2014-02-27
  • 通讯作者: 兰章 E-mail:lanzhang@hqu.edu.cn
  • 基金资助:

    国家自然科学基金(U1205112,51002053),教育部科技重点项目(212206),福建省高校杰出青年研究人才计划项目,福建省高校新世纪优秀人才支持计划项目和华侨大学中青年教师科研提升资助计划(ZQN-YX102)资助

Fabrication and Photovoltaic Performance of High Efficiency Front-Illuminated Dye-Sensitized Solar Cell Based on Ordered TiO2 Nanotube Arrays

GAO Su-Wen1, LAN Zhang1,2,3, WU Wan-Xia1, QUE Lan-Fang1, WU Ji-Huai1,2,3, LIN Jian-Ming1,2,3, HUANG Miao-Liang1,2,3   

  1. 1 Institute of Materials Physical Chemistry, Huaqiao University, Xiamen 361021, Fujian Province, P. R. China;
    2 Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Xiamen 361021, Fujian Province, P. R. China;
    3 Key Laboratory of Functional Materials for Fujian Higher Education, Xiamen 361021, Fujian Province, P. R. China
  • Received:2013-11-15 Revised:2013-12-31 Published:2014-02-27
  • Contact: LAN Zhang E-mail:lanzhang@hqu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (U1205112, 51002053), Key Project of the Ministry of Education of China (212206), Program for Prominent Young Talents in Fujian Province University, China; Program for New Century Excellent Talents in Fujian Province University, China, and Promotion Program for Yong and Middle-aged Teacher in Science and Technology Research of Huaqiao University, China (ZQN-YX102).

摘要:

报道了一种基于TiO2纳米管(TNT)阵列正面透光型光阳极的高效染料敏化太阳能电池. 将TNTs 在450 ℃烧结后能避免其有序结构在HF处理过程中被破坏,使膜内高速电子传输通道被保留,有利于染料敏化太阳能电池(DSSC)实现高速电荷传输. 再用HF、TiCl4、HF和TiCl4混合等溶剂对TNTs 进行处理,提高其表面粗糙度以吸附更多染料. 染料吸附量的增加能提高光阳极在300-570 nm波段光子捕获效率,该波段是染料吸收光子的主要区域. 然而,在染料吸收光子较弱的长波段区域(570-800 nm)光子捕获效率的增加主要源于光阳极光散射率的提高. 光阳极光子捕获效率的提高使DSSC的内外量子效率在全波段(300-800 nm)均有所增加,从而使短路电流明显提高. 从电化学阻抗数据可知,与电子传输性能密切相关的电化学参数如电荷传输电阻、界面电荷复合电阻、电容、电子寿命、电子扩散长度和电子收集效率等在含处理过的TNTs 光阳极DSSC中均有所改善,从而提高电池光电转换效率. 含HF和TiCl4混合溶剂处理TNTs 光阳极的DSSC最高光电转换效率能达到7.30%,比未处理的DSSC (5.38%)提高35.69%.

关键词: TiO2纳米管阵列, 染料敏化太阳能电池, 光阳极, HF, TiCl4

Abstract:

An efficient front-illuminated dye-sensitized solar cell (DSSC) based on ordered TiO2 nanotube (TNT) arrays was prepared. Sintering at 450 ℃ avoided damage of the ordered TNTs during HF treatment. Fast electron transport channels were maintained in the membrane, for efficient charge transportat in the DSSC. The sintered TNT membranes were subsequently treated with HF, TiCl4, and HF combined with TiCl4. This formed a rougher surface, and allowed increased dye loadings. The increased dye loading improved the light harvesting efficiency of the photoanode at 300-570 nm wavelength range, which is the main absorption region of the adsorbed dye. The adsorbed dye had a low absorption at 570-800 nm wavelength range. The enhanced light harvesting efficiency of the photoanode originated from its increased diffuse reflectance. The incident-photon-to-current and absorbed-photon-to-current conversion efficiencies were increased over the entire 300-800 nm wavelength range. This resulted in an increased short-circuit current density of the DSSC. Electrochemical impedance spectroscopy indicated that electron transport and related parameters including charge transport resistance, interfacial charge recombination resistance, distributed chemical capacitance, electron lifetime, effective electron diffusion length, and collection efficiency were significantly improved in the DSSC containing the treated TNT photoanode. This also resulted in an enhanced photovoltaic performance. The maximum power conversion efficiency from combining HF and TiCl4 treatments was 7.30%, which was a 35.69% enhancement compared with the nontreated DSSC (5.38%).

Key words: TiO2 nanotube array, Dye-sensitized solar cell, Photoanode, HF, TiCl4

MSC2000: 

  • O644