Thermal accumulation effect of a three-junction GaAs cell with multipulse laser irradiation

Lei Qi; Yali Liu; Hao Jing; Yanxin Xie; Xiaomin Yang; Rongzhu Zhang

doi:10.1364/AO.383948

Applied Optics
Vol. 59,
Issue 6,
pp. 1611-1617
(2020)
•https://doi.org/10.1364/AO.383948

Thermal accumulation effect of a three-junction GaAs cell with multipulse laser irradiation

Lei Qi, Yali Liu, Hao Jing, Yanxin Xie, Xiaomin Yang, and Rongzhu Zhang

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Lei Qi, Yali Liu, Hao Jing, Yanxin Xie, Xiaomin Yang, and Rongzhu Zhang, "Thermal accumulation effect of a three-junction GaAs cell with multipulse laser irradiation," Appl. Opt. 59, 1611-1617 (2020)

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Abstract

A theoretical model on accumulation of temperature and stress in a three-junction GaAs solar cell is proposed to analyze its damage characteristics while irradiated by a multipulse laser. The distribution and accumulation effect of temperature and stress with different pulse widths are calculated. Specifically, the influences of pulse energy and duty ratio on the accumulation effect are discussed. Results show that the accumulation is weakened as pulse energy and duty ratio decrease and differ with the different pulse widths. The accumulation rate of stress is more rapid than that of temperature under nanosecond laser irradiation. Furthermore, tensile stress damage is the main damage form under nanosecond laser irradiation, and melting damage will change to main damage from a millisecond laser.

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Material	$ρ$ ( $k g \cdot m^{- 3}$ )	$c (J \cdot {k g}^{- 1} \cdot K^{- 1})$	$K (W \cdot {c m}^{- 1} \cdot K^{- 1})$	$v$	$E$ (Pa)	$γ$ ( $K^{- 1}$ )	Melting Point (K)	Tensile Strength (Pa)
${S i O}_{2}$	2200	1000	1.7	0.16	$8.7 \times 10^{10}$	$0.5 \times 10^{- 6}$	1980	$1.4 \times 10^{7}$
${G a I n P}_{2}$	4475	370	5	0.335	$8.2 \times 10^{10}$	$5.3 \times 10^{- 6}$	1627	$2.5 \times 10^{9}$
GaAs	$5336 - 0.0337 T$	$303 + 15 \times (T / 300)$	$42.5 \times (300 / T)^{1.1}$	0.31	$8.59 \times 10^{10}$	$6.4 \times 10^{- 6}$	940 (decomposing) 1510 (melting)	$2.3 \times 10^{9}$
Ge	$5343 - 0.066 T$	$303 + 0.0613 T$	$60 \times (300 / T)$	0.26	$10.3 \times 10^{10}$	$5.6 \times 10^{- 6}$	1210	$9.3 \times 10^{7}$

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Applied Optics