Lambertian light trapping in textured solar cells and light‐emitting diodes: analytical solutions

Light trapping by texturing solar cell surfaces has produced significant gains in solar cell performance over recent decades, particularly for cells based on the relatively weakly absorbing semiconductors, such as crystalline silicon and amorphous silicon–hydrogen alloys. Previous solutions for the properties of the resulting textured optical sheets have been based on approximations valid in the weak absorption limit or have been obtained numerically. Analytical solutions are described for ideal Lambertian light trapping and these results used to deduce simple solutions that apply in other than the weak absorption limit. Copyright © 2002 John Wiley & Sons, Ltd.

[1]  Martin A. Green,et al.  Third generation photovoltaics , 2002, 2002 Conference on Optoelectronic and Microelectronic Materials and Devices. COMMAD 2002. Proceedings (Cat. No.02EX601).

[2]  M. Green,et al.  Efficient silicon light-emitting diodes , 2001, Nature.

[3]  A. Luque,et al.  Experimental extraction of light confinement parameters for textured silicon wafers , 1995 .

[4]  Eli Yablonovitch,et al.  Ultrahigh spontaneous emission quantum efficiency, 99.7% internally and 72% externally, from AlGaAs/GaAs/AlGaAs double heterostructures , 1993 .

[5]  Antonio Luque,et al.  Solar Cells and Optics for Photovoltaic Concentration , 1989 .

[6]  J. Gee.  The effect of parasitic absorption losses on light trapping in thin silicon solar cells , 1988, Conference Record of the Twentieth IEEE Photovoltaic Specialists Conference.

[7]  K. B. Oldham,et al.  An Atlas of Functions. , 1988 .

[8]  M. Green,et al.  Light trapping properties of pyramidally textured surfaces , 1987 .

[9]  Ping Sheng,et al.  Optical absorption of thin film on a Lambertian reflector substrate , 1984 .

[10]  Eli Yablonovitch,et al.  Optically enhanced amorphous silicon solar cells , 1983 .

[11]  E. Yablonovitch.  Statistical ray optics , 1982 .

[12]  A. Goetzberger.  Optical confinement in thin Si-solar cells by diffuse back reflectors , 1981 .

[13]  D. Redfield,et al.  Multiple‐pass thin‐film silicon solar cell , 1974 .

[14]  P. Morse,et al.  Methods of theoretical physics , 1955 .