Dependence of the solar cell performance on nanocarbon/Si heterojunctions  

作　　者：肖仕奇 范庆霞 夏晓刚 肖卓建 陈辉亮 席薇 陈鹏辉 李俊杰 王艳春 刘华平 周维亚 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Beijing Key Laboratory for Advanced Functional Materials and Structure Research

出　　处：《Chinese Physics B》2018年第7期595-600,共6页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China(Grant No.2018YFA0208402);the National Basic Research Program of China(Grant No.2012CB932302);the National Natural Science Foundation of China(Grant Nos.11634014,51172271,and 51372269);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA09040202)

摘　　要：Solar cells that combine single-crystalline silicon （Si） with graphene （G） have been widely researched in order to develop next-generation photovoltaic devices. However, the power conversion efficiency （PCE） of G/Si solar cell without chemical doping is commonly low due to the relatively high resistance of graphene. In this work, through combining graphene with carbon nanotube （CNT） networks, we fabricated three kinds of hybrid nanocarbon film/Si heterojunction solar cells in order to increase the PCE of the graphene based Si solar cell. We investigated the characteristics of different nanocarbon film/Si solar cells and found that their performance depends on the heterojunctions. Specifically, a doping-free G-CNT/Si solar cell demonstrated a high PCE of 7.9%, which is nearly equal to the combined value of two individuals （G/Si and CNT/Si）. This high efficiency is attributed to the synergistic effect of graphene and CNTs, and can be further increased to 9.1% after applying a PMMA antireflection coating. This study provides a potential way to further improve the Si based heterojunction solar cells.Solar cells that combine single-crystalline silicon （Si） with graphene （G） have been widely researched in order to develop next-generation photovoltaic devices. However, the power conversion efficiency （PCE） of G/Si solar cell without chemical doping is commonly low due to the relatively high resistance of graphene. In this work, through combining graphene with carbon nanotube （CNT） networks, we fabricated three kinds of hybrid nanocarbon film/Si heterojunction solar cells in order to increase the PCE of the graphene based Si solar cell. We investigated the characteristics of different nanocarbon film/Si solar cells and found that their performance depends on the heterojunctions. Specifically, a doping-free G-CNT/Si solar cell demonstrated a high PCE of 7.9%, which is nearly equal to the combined value of two individuals （G/Si and CNT/Si）. This high efficiency is attributed to the synergistic effect of graphene and CNTs, and can be further increased to 9.1% after applying a PMMA antireflection coating. This study provides a potential way to further improve the Si based heterojunction solar cells.

关 键 词：carbon nanotube GRAPHENE HETEROJUNCTION silicon solar cell 

分 类 号：TM914.4[电气工程—电力电子与电力传动]