Nanophotonic-structured front contact for high-performance perovskite solar cells
Document Type
Article
Publication Date
7-1-2022
Abstract
We report the design of a nanophotonic metaloxide front contact aimed at perovskite solar cells (PSCs) to enhance optoelectronic properties and device stability in the presence of ultraviolet (UV) light. High-quality Cr-doped ZnO film was prepared by industrially feasible magnetron sputter deposition for the electron transport layer of PSCs. As a means, the influence of the Cr content on the film and device was systematically determined. In-depth device optics and electrical effects were studied using advanced three-dimensional opto-electrical multiphysics rigorous simulations, optimizing the front contact for realizing high performance. The numerical simulation was validated by fabricating PSCs optimized to reach high performance, energy conversion efficiency (ECE) = 17.3%, open-circuit voltage (V-OC) = 1.08 V, short-circuit current density (J(SC)) = 21.1 mA cm(-2), and fillfactor (FF) = 76%. Finally, a realistic front contact of nanophotonic architecture was proposed while improving broadband light absorption of the solar spectrum and light harvesting, resulting in enhanced quantum efficiency (QE). The nanophotonic PSC enables J(SC) improvement by similar to 17% while reducing the reflection by 12%, resulting in an estimated conversion efficiency over 23%. It is further demonstrated how the PSCs' UV-stability can be improved without considerably sacrificing optoelectronic performances. Particulars of nanophotonic designed ZnO:Cr front contact, PSCs device, and fabrication process are described.
Keywords
ZnO:Cr front contact, Magnetron sputtering, Perovskite solar cells, UV stability, Optics and electrical effects
Divisions
sch_ecs
Funders
Universiti Kebangsaan Malaysia, Malaysia [Grant No: LRGS/1/2019/UKM-UKM/6/1],King Saud University [Grant No: RSP-2021/34],Innovation and Technology Commission of Hong Kong [Grant No: GHP/040/19SZ]
Publication Title
Science China-Materials
Volume
65
Issue
7
Publisher
Science Press
Publisher Location
16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA