InN/InGaN多层量子点中的光吸收与光伏性能：限制势、铟组分和内建电场的影响

Abstract This study investigates the impact of the confinement potential, indium fraction, and internal electric fields on the optical and photovoltaic properties of multilayer InN/InGaN quantum dots . Using the effective mass approximation and a variational method to solve the Schrödinger equation, we analyze how core, shell dimensions, and In-fraction variations affect energy levels, absorption spectra , and solar cell performance. The results show that increasing In-fraction in the inner layer lowers carrier energy levels due to reduced confinement, particularly in structures with small core radii . A thinner initial shell enhances the photocurrent and energy-conversion efficiency. The calculated absorption coefficients exhibit a blue shift with increasing core and shell size, confirming strong quantum confinement effects . Furthermore, stronger confinement and internal electric fields lead to higher energy absorption peaks with reduced intensity. These findings highlight the potential of optimized InN/InGaN quantum dot architectures for efficient optoelectronic and photovoltaic applications.