|
The energy conversion efficiency of perovskite solar cells can be boosted by enhancing the short-circuit current density, where efficient photon management allows realizing a high short-circuit current density. The efficient photon management relies mostly on the solar cell surface, hence, the front contact of the device. The front contact must fulfil some basic requirements so that both lateral charge transport and light incoupling can be achieved efficiently by lowering the optical losses. In this study, we utilized metal oxide films as a potential charge transport material and front contact, which allows achieving efficient photon management in perovskite solar cells. In the current study, a planar perovskite solar cell was fabricated experimentally, where nickel oxide hole transport layer is prepared by using electron beam deposition at a low temperature. Necessary material characterizations were performed to ensure the high-quality films. Spectroscopic ellipsometry measurements were carried out to extract the complex refractive index of the deposited films, which is used to study the optics of perovskite solar cells. Finite-difference time-domain optical simulations were used to investigate the optics and optimize the perovskite solar cells. Simulation results give a very good agreement with experimental results. Finally, an optimized perovskite solar cell structure will be proposed which can enhance the short-circuit current density and energy conversion efficiency by 20% and >25%, respectively. The optimized device design can be further applied to the implementation of perovskite/silicon tandem solar cells. Detail discussion of the proposed structure will be provided to attain effective photon management for perovskite solar cells.
|
