Enabling Perovskite Solar Cell Omnidirectional Light Utilizing Via Trapping Technology

Abstract

AbstractPromising optoelectronic properties of perovskites make it a research hotspot for the scientific community. Previously many groups are working on optical optimization, interface modification, material screening, and energy level matching of perovskite solar cells (PSCs). Herein, PSCs compatible with nano‐structure and photonic crystal (NSPC) are designed theoretically by using the numerical simulation technology that gives better light trapping capability to the PSC devices. The physical model is composed of perovskite spheres based on TiO2 and PDMS with the nanostructure. The size parameters of the photovoltaic devices are optimized and the wide‐angle absorption characteristics of PSCs with NSPC structure are investigated. Simulation results verify the superior optical performance of the new PSCs with a maximum photocurrent of 25.77 mA cm−2, which is 2.17 mA cm−2 higher than that of the conventional flat structured PSCs (23.60 mA cm−2). The results of the wide‐angle study demonstrate that the novel PSCs have omnidirectional absorption of photons. To elucidate the light‐trapping mechanism of the novel PSCs, the electric and magnetic field distributions of different structural PSCs are analyzed. The physical model the authors establish provides a solid theoretical basis for the research and development of PSCs with ultra‐low surface reflection loss and ultra‐high performance.