提高染料敏化太阳能电池光电转换效率的一种新方法.docVIP

提高染料敏化太阳能电池光电转换效率的一种新方法 李飞涛， 王龙阁， 霍濯宇， 顾玉宗* （河南省光伏重点实验室和河南大学物理与电子学院，河南 开封 475001） 摘要:在染料敏化太阳能电池的对电极后面加一个反射镜是一种可以提高电池光电转换效率的新方法, 在染料敏化太阳能电池的对电极后面加一个反射镜, 改变了光的传播路径并且在对电极后光被反射镜重新反射到电池里，促进了电池对光的吸收, 因此电池的光电转换性能得到提高. 用X射线衍射(XRD), 扫描电镜(SEM), 线性扫描伏安系统对二氧化钛电极进行形貌和光电转换性能进行了表征. 实验结果表明, 在AM = 1.5辐射条件下, 加上反射镜后, 染料敏化太阳能电池的光电转换效率从4.81% 提高到5.43%, 短路电流密度, 开路电压, 填充因子分别为18.65 mA/cm2, 0.728 V and 0.561. 关键词：反射镜; 染料敏化太阳能电池; 转换效率; 二氧化钛电极; 短路电流密度; 填充因子 A Novel Improved Method to Increase the Efficiency of Dye-Sensitized Solar Cells LI Fei-Tao, WANG Long-Ge, HUO Zhuo-yu, GU Yu-Zong*, (Key Laboratory of Photovoltaic Materials of Henan Province and School of Physics Electronics, Henan University, Kaifeng 475001, P.R. China) Abstract: A novel improved method which employs a reflective mirror at the back of the pt counter electrode is used in dye-sensitized solar cells (DSSC). The direction of the light propagation in the cells was changed because of adding a mirror at the back of the pt counter electrode of the DSSC and the light reflected back into the DSSC to enhance the optical absorption of the DSSCs. Therefore, the performance of the cells was improved distinctively. The TiO2 electrodes had been characterized by X-ray diffraction, scanning electron microscopy and 棗棗棗?he l( 基金项目：河南省科技厅（082300460070河南省教育厅（2008A140001）Linear Sweep Voltammetry system. The results indicates that the conversion- efficiency can be increased from 4.81% to 5.43% under AM = 1.5 illumination when a mirror is added at the back of the pt counter electrode in the cell. Meanwhile, the Jsc, Voc and the fill factor which can achieve 18.65 mA/cm2, 0.728 V and 0.561, respectively. Keywords: A reflective mirror; Dye-sensitized solar cells; Conversion efficiency；TiO2 electrodes; the short circuit current ; the fill factor 0 引言 近年来，随着能源需求的急剧增加以及环保，节能意识的增强，太阳能电池的研究越来越受到人们的重视，1991年，M.Gaztel[1]教授采用染料敏化的纳米多孔TiO2薄膜制成太阳能电池的效率达到7.1%[2],自从这项科研成果报道以来，世界各国科学家对其进行了广泛的研究.染料敏化太阳能电池(DSSC)由于其低成本,易组装和较高的光电转换效率等特点，有望成为传统硅太阳能电池的一