硒钴元素修饰PAN/RGO复合对电极在DSSCs中的应用

Selenium and Cobalt Modified RGO/PAN Counter Electrodes for DSSCs

高效低成本的非铂对电极是染料敏化太阳能电池研究的重要方向之一.在FTO导电玻璃上原位制备硒钴元素修饰的聚苯胺/石墨烯复合对电极用于染料敏化太阳能电池,研究不同的硒、钴以及石墨烯的含量对聚苯胺复合对电极性能的影响.利用激光共聚焦激光拉曼光谱、扫描电子显微镜、循环伏安法、电化学阻抗谱等对电极进行成分、表面形貌及电化学性能的分析,并以制备的复合对电极组装染料敏化太阳能电池,测定其光电转换性能.在优化条件下,获得6.21%的光电转换效率,显示出良好的应用前景.

The high-performance and low-cost counter electrode(CE)with non-platinum materials is an attracting issue of dye-sensitized solar cells(DSSCs).We present here the experimental realization of modified RGO/PAN(reduced graphene oxide/polyaniline)counter electrodes(CEs)with selenium and cobalt elements by in-situ synthesis for dye-sensitized solar cells.The resultant Co-Se/RGO/PAN CEs show superior electrocatalytic activity by electrochemical performance tests with cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS).Due to the improvement of charge transfer characteristics,the solar cell has achieved good efficiency of the photovoltaic conversion.By optimizing the component content in synthesizing composite CEs,the maximal power conversion efficiency is achieved 6.21%for DSSCs with Co-Se/RGO/PAN CEs.It is a promising result in reducing the fabrication cost of DSSCs.