Numerical simulation of high-efficiency InGaP/GaAs/InGaAs triple-junction solar cells grown on GaAs substrate

The structure parameters and illumination condition for InGaP/GaAs/InGaAs triple-junction solar cells grown on GaAs substrate have been numerically studied to search the optimal point of device performance. The dependences of conversion efficiency, I-V curves, and band diagram on the structure parameters and illumination condition have been investigated. Our work shows that the performances are largely dependent on the geometric design of device and the optimal parameters are extracted.