石墨烯/Ag@TiO2共同修饰的染料敏化太阳能电池制备及其性能  

Preparation and Properties of Graphene/Ag@TiO2 Modified Dye-Sensitized Solar Cells

作　　者：郭楷模 陈伟[1] 李明月[2] 何涛[1] 白利华 李美亚[2] GUO Kaimo;CHEN Wei;LI Mingyue;HE Tao;BAI Lihua;LI Meiya(Wuhan Library,Chinese Academy of Sciences,Wuhan 430071,Hubei,China;School of Physics and Technology,Wuhan University,Wuhan 430072,Hubei,China)

机构地区：[1]中国科学院武汉文献情报中心,湖北武汉430071 [2]武汉大学物理科学与技术学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2018年第5期377-384,共8页Journal of Wuhan University:Natural Science Edition

基　　金：国家重点基础研究发展计划(973)项目(2011CB933304);国家自然科学基金项目(51372174);中科院自主部署项目(Y6ZG83)资助

摘　　要：利用水热法制备石墨烯和Ag@TiO2核壳纳米颗粒（nanoparticles,NPs）共同修饰的染料敏化太阳能电池（dye-sensitized solar cell,DSSC）,研究石墨烯和Ag@TiO2纳米颗粒对光阳极和DSSC性能的影响.实验结果显示,掺入的Ag@TiO2纳米颗粒质量分数为0.6%时,制备的DSSC性能最优,光电转换效率（photoelectric conversion efficiency,PCE）为5.84%,相比于纯TiO2光阳极DSSC提高了近20%.研究表明,石墨烯/Ag@TiO2染料敏化太阳能电池性能的提高,一方面是由于Ag@TiO2纳米颗粒的掺入增强了染料的光吸收能力;另一方面是由于石墨烯的引入显著改善了光阳极染料的吸附量,加快了载流子的传输,增加了载流子寿命,两者协同显著提高了DSSC的短路电流密度（short-circuit photocurrent density,J（sc））和光电转换效率.A dye-sensitized solar cell（DSSC）modified by graphene and Ag@TiO2nanoparticles（NPs）was prepared by hydrothermal method.The impact of graphene and Ag@TiO（2 ）NPs on the performance of photoanode and DSSC was investigated.The experimental results reveal that the performance of DSSC is improved by incorporating graphene and Ag@TiO（2 ）NPs.When the content of Ag@TiO（2 ）NPs reaches 0.6%（mass fraction）,the DSSC achieves the best performance with photoelectric conversion efficiency（PCE）of 5.84%,20%higher than that of the DSSC based on pure TiO2photoanode.The result indicates that the improved property of the DSSC with graphene and Ag@TiO2NPs can be attributed to two reasons：one is that the incorporation of Ag@TiO2NPs enhances the light absorption of the dye;another is that the graphene improves dye adsorption amount,carrier mobility and carrier life,thus the joint action results in the great enhancement in the short-circuit photocurrent density（J（sc））and the PCE of the DSSC.

关 键 词：石墨烯 Ag@TiO2核壳纳米颗粒 染料敏化太阳能电池 局域表面等离子体共振 协同效应 

分 类 号：TK514[动力工程及工程热物理—热能工程]