Title :
A detailed analysis of photogenerated current enhancement in thin silicon solar cells with a diffuse back reflector
Author :
El Naggar, S.A. ; Ghannam, M.Y. ; Rafat, N.H. ; Tayel, F.M.
Author_Institution :
Dept. of Math. & Eng. Phys., Cairo Univ., Egypt
Abstract :
A thin solar cell with light trapping obtained via diffuse (lambertian) back surface reflection is analyzed. An accurate closed form expression is derived for the generation profile. The enhancement of the photogenerated current is estimated. The results show that a diffuse back reflector can lead to doubling of the photogenerated current in a 3 μm cell. It is also proved that the commonly used loss cone assumption is usually valid but should be used cautiously.
Keywords :
elemental semiconductors; light reflection; photoconductivity; semiconductor device models; semiconductor thin films; silicon; solar cells; 3 micron; Si; closed form expression; diffuse back reflector; diffuse back surface reflection; generation profile; lambertian back surface reflection; light trapping; loss cone assumption; photogenerated current; photogenerated current doubling; photogenerated current enhancement; thin silicon solar cells; thin solar cell; Optical films; Optical reflection; Optical refraction; Optical scattering; Optical variables control; Photovoltaic cells; Semiconductor thin films; Silicon; Solar power generation; Wide area networks;
Conference_Titel :
Microelectronics, 1999. ICM '99. The Eleventh International Conference on
Print_ISBN :
0-7803-6643-3
DOI :
10.1109/ICM.2000.884839
