April 14 (Renewables Now) - South Korean researchers have found a way to produce inorganic-organic hybrid perovskite solar cells (PSCs) with a steady-state power conversion efficiency of 21.2% and what they say is “excellent” photostability.
The PSCs have been fabricated using photoelectrode materials (Lanthanum (La)–doped BaSnO3 (LBSO)) synthesised at temperatures below 200 degrees Celsius. They used methylammonium lead iodide (MAPbI3) perovskite materials for PSCs. The material has retained 93% of its initial performance after 1,000 hours of full Sun illumination.
The schematic image above represents the LBSO powder prepared in the study, the solution dispersed in the solvent, and the thin film coated on the substrate. Shown right is the proposed crystal structure of the phase evolution in the CSMC route.
The team also used a new solar cell manufacturing methodology which they call the ‘Hot-Pressing Method’, allowing for lower manufacturing costs.
The research has been conducted by Professor Sang-Il Seok at the Ulsan National Institute of Science and Technology (UNIST) in collaboration with Dr Seong Sik Shin and Dr Jun Hong Noh of Korea Research Institute of Chemical Technology (KRICT), and published in the March issue of Science.