Photoelectrical properties of flexible quasi-interdigitated back-contact perovskite solar cells

Perovskites are a promising class of solution-processed semiconductor materials that are intensively investigated for their application in flexible solar cells and other optoelectronic devices. In this work, the fabrication and characterization of flexible quasi-interdigitated back-contact perovskite solar cells (FQIBC PSCs) are presented. The performance of fabricated devices on illumination direction (front-side or rear-side) and illumination intensity are studied. The current–voltage characteristics of the devices reveal that the performance of devices is better when illuminated from the rear-side. The quantum efficiency measurements show that the front-side illumination allows to avoid the light transmission losses and achieve a wide-spectral response in the devices. The dependence of the device open-circuit voltage on the illumination intensity is investigated to determine the dominant charge carrier recombination mechanism in the devices.