TiO2纳米棒修饰石墨烯/TiO2复合DSSCs光阳极的组装与光电性能
Assembly and photoelectric conversion efficiency of graphene/TiO2 composite DSSCs photoanode modified by TiO2 nanorods
魏立国 1徐晓虎 1刘俊云 1赵立双 1李菲 1张馨丹 1张紫涵1
作者信息
- 1. 黑龙江科技大学 环境与化工学院,哈尔滨 150022
- 折叠
摘要
提升TiO2 光阳极的性能是实现染料敏化太阳能电池大规模应用的关键.利用石墨烯的高载流子迁移率和TiO2 纳米棒一维结构的协同作用,构建了石墨烯/TiO2 纳米棒复合光阳极.通过XRD、SEM和氮气吸附-脱附测试对其进行物相表征,采用循环伏安法和塔菲尔极化曲线等测试其电化学性能,研究复合光阳极组成结构与光电性能之间的构效关系.结果表明,复合光阳极降低了TiO2 光阳极的电子复合速率,抑制了TiO2 纳米晶体团聚,增强了TiO2 光阳极电子传输效率,将DSSCs的光电转换效率提高至7.37%,比纯TiO2 光阳极DSSCs的光电转换效率增加了39%.
Abstract
This paper is based on the insight that enhancing the performance of TiO2 photoanodes is the key to large-scale application of dye-sensitized solar cells(DSSCs).The study involves constructing a graphene/TiO2 nanorod composite photoanode by utilizing the synergistic effect of the high carrier mobility of graphene and the one-dimensional structure of TiO2 nanorods;characterizing the composition and mor-phology of the composite photoanode by using XRD,SEM,and N2 adsorption-desorption tests;and stud-ying the structure-activity relationship between the composition and structure of the composite photoanode and the photoelectric performance with cyclic voltammetry and Tafel polarization curves.The results indi-cate that the composite photoanode reduces the electron recombination rate of the TiO2 photoanode,inhib-its the aggregation of TiO2 nanocrystals,and enhances the electron transport efficiency of the TiO2 photoa-node,as which leads to an increase in the photoelectric conversion efficiency of DSSCs to 7.37%,which is a 39%improvement compared to DSSCs with pure TiO2 photoanodes.
关键词
染料敏化太阳能电池/TiO2纳米棒/石墨烯/复合光阳极/光电性能Key words
dye-sensitized solar cells/TiO2 nanorods/graphene/composite photoanode/photoelec-tric conversion efficiency引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据