The Design and Optimization of GaAs Single Solar Cells Using the Genetic Algorithm and Silvaco ATLAS

Table 1

Standard parameters used in this solar cell design.

Material	GaAs	InAlGaP	AlGaAs
Band gap Eg (eV) at 300 K	1.42	2.3	1.8
Lattice constant α (Å)	5.65	5.65	5.64
Permittivity (es/eo)	13.1	11.7	11.0
Affinity (eV)	4.07	4.2	4.1
Heavy e− effective mass ()	0.06	2.85	2.4
Heavy h+ effective mass ()	0.5	0.64	0.62
e− mobility MUN (cm^2/V × s)	8800	2150	2000
h+ mobility MUP (cm^2/V × s)	400	141	138
e− density of states NC (cm^−3)	4.7E + 17	1.20E + 20	4.35E + 17
h+ density of states NV (cm^−3)	7.0E + 18	1.28E + 19	8.16E + 18
Lifetime (el) (s)	1.00E − 09	1.00E − 09	1.00E − 09
Lifetime (ho) (s)	2.00E − 08	1.00E − 09	2.00E − 08