Photovoltaic properties of dye sensitised solar cells using TiO2 nanotube arrays for photoanodes: Role of hydrochloric acid treatment
Photovoltaic properties of dye sensitised solar cells using TiO2 nanotube arrays for photoanodes: Role of hydrochloric acid treatment
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DOI：
10.1016/j.apsusc.2015.07.102
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发表时间：
2015-11
影响因子：
6.7
通讯作者：
Tian Liu;Baoyuan Wang;Jianshan Xie;Quantong Li;Jun Zhang;M. Asghar;P. Lund;Hao Wang
中科院分区：
文献类型：
--
作者：
Tian Liu;Baoyuan Wang;Jianshan Xie;Quantong Li;Jun Zhang;M. Asghar;P. Lund;Hao Wang
为了提高染料敏化太阳能电池的光伏性能，采用盐酸对TiO2纳米管阵列进行表面改性.研究了TiO2纳米管阵列及其组装电池的微观结构、光学和光伏性能。结果发现，盐酸处理并不改变纳米管阵列的形貌和晶体结构，但会导致TiO2表面上更多的羟基用于染料吸附，并使表面质子化，从而改善染料吸附和提高电子注入的量子产率。一个主要的性能增强被发现起源于显着增加的染料吸附。当用0.1 M HCl溶液处理光阳极时，观察到功率转换效率为8.4%，JSC为16.8 mA cm− 2，VOC为0.7 V。
A hydrochloric acid treatment was performed to modify the surface of TiO2nanotube arrays for improving the photovoltaic performance of dye-sensitized solar cells. The microstructural, optical and photovoltaic properties of TiO2nanotube arrays and the assembled cells were investigated in detail. It was found that HCl treatment does not change the morphology and crystallographic structure of the nanotube arrays, but it results in more hydroxyl groups on the TiO2surface for dye adsorption and a surface protonation for both an improved dye adsorption and a higher quantum yield of electron injection. A major performance enhancement was found which originated from the remarkable increase in the dye adsorption. A power conversion efficiency of 8.4%,JSCof ∼16.8 mA cm−2andVOCof 0.7 V was observed when the photoanode was treated with a 0.1 M HCl solution.