Low-Intensity and Low-Temperature Effects on the Upright Metamorphic Four-Junction Solar Cells

Upright metamorphic four junctions solar cells are evaluated under different low-intensity and low-temperature conditions. The efficiency findings near the Earth's orbit (1 sun, 300 K), Jupiter (0.032 sun, 123 K), and Saturn (0.01 sun, 100 K) are 26.54%, 29.68%, and 28.27%, respectively. According to the single diode model, Jsc is linear with light intensity (I), while Voc is linear with the natural logarithm of light intensity (ln(I)). Voc shows a linear relationship with temperature within the range of 150 to 300 K, with a temperature coefficient of approximate to-7.7 mV K-1. However, Voc displays a sublinear relationship with temperatures below 150 K. The effect of low intensity and low temperature on the upright metamorphic four junctions solar cells is investigated in this work. Open circuit voltage (Voc) gradually increases as the temperature decreases. In the range of 300-150 K, Voc shows a linear increase as the temperature decreases. The temperature coefficient is about -7.7 mV K-1 under different light intensities. Voc shows sublinear behavior below 150 K.image (c) 2024 WILEY-VCH GmbH