Dear Quantumwise staffs,
Recently I have read the paper Efficient First-Principles Calculation of Phonon-Assisted Photocurrent in Large-Scale Solar-Cell Devices
. It can be seen phonon plays an important role in calculating photocurrent for inderect energy gap materials. However, phonon calculation using DFT is pretty expensive and time-consuming. So I want to know if there is one material with small difference between direct gap and indirect gap (e.g. direct gap :0.42 eV, indirect gap: 0.38 eV), under low temperature condition (i.e. phonon effect is suppressed), is it reasonable to calculate photocurrent not considering EPC? Does the calculated photocurrent mainly come from transition of electrons through direct gap?
Best wishes
