Absorption enhancement in thin film a-Si solar cells with double-sided SiO_2 particle layers  

作　　者：陈乐 王庆康 沈向前 陈文 黄堃 刘代明 

机构地区：[1]Key Laboratory for Thin Film and Micro-fabrication of the Ministry of Education,Department of Microelectronics and Nanoscience,Shanghai Jiao Tong University [2]School of Physical Science and Technology Engineering,Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing,Yulin Normal University

出　　处：《Chinese Physics B》2015年第10期186-190,共5页中国物理B（英文版）

基　　金：Project supported by the National High-Tech Research and Development Program of China(Grant No.2011AA050518);the University Research Program of Guangxi Education Department,China(Grant No.LX2014288);the Natural Science Foundation of Guangxi Zhuang Autonomous Region,China(Grant No.2013GXNSBA019014)

摘　　要：Light absorption enhancement is very important for improving the power conversion efficiency of a thin film a-Si solar cell. In this paper, a thin-film a-Si solar cell model with double-sided SiO2 particle layers is designed, and then the underlying mechanism of absorption enhancement is investigated by finite difference time domain（FDTD） simulation;finally the feasible experimental scheme for preparing the SiO2 particle layer is discussed. It is found that the top and bottom SiO2 particle layers play an important role in anti-reflection and light trapping, respectively. The light absorption of the cell with double-sided SiO2 layers greatly increases in a wavelength range of 300 nm-800 nm, and the ultimate efficiency increases more than 22% compared with that of the flat device. The cell model with double-sided SiO2 particle layers reported here can be used in varieties of thin film solar cells to further improve their performances.Light absorption enhancement is very important for improving the power conversion efficiency of a thin film a-Si solar cell. In this paper, a thin-film a-Si solar cell model with double-sided SiO2 particle layers is designed, and then the underlying mechanism of absorption enhancement is investigated by finite difference time domain（FDTD） simulation;finally the feasible experimental scheme for preparing the SiO2 particle layer is discussed. It is found that the top and bottom SiO2 particle layers play an important role in anti-reflection and light trapping, respectively. The light absorption of the cell with double-sided SiO2 layers greatly increases in a wavelength range of 300 nm-800 nm, and the ultimate efficiency increases more than 22% compared with that of the flat device. The cell model with double-sided SiO2 particle layers reported here can be used in varieties of thin film solar cells to further improve their performances.

关 键 词：thin film a-Si solar cells light trapping ANTI-REFLECTION Si02 particle 

分 类 号：TM914.42[电气工程—电力电子与电力传动]