South Korea's South University scientists using the joint precipitation method for the solar cell invented a unique perovskite layer.
The picture shows South Korea University of South Korea developed perovskite solar cells.
The perovskite solar cell uses lead halide as a light absorber, nanoporous nickel oxide as a hole transport material (HTL), lead methylamine and methyl lead bromide as a perovskite layer, and a layer of organic / Inorganic zinc oxide compound electron transport layer (ETL) to prevent the perovskite layer exposed to the air, thereby avoiding battery degradation.
According to the article published in the journal Contemporary Materials, the battery had a 19.1% conversion efficiency in the initial test and only a fifth of the conversion efficiency after five months of use.
Dr. Sawanta Mali, Co-author of the article, explains: 'We successfully optimized the metal oxides in the HTL and ETL protective layers in a simple way to enhance the air stability of the perovskite solar cells. Our main goal is to price Low-cost, air-stable n-type and p-type inorganic metal oxides simplify the lengthy manufacturing process by replacing expensive, low-stability, hole-transport materials that require additional additives.
Although this technology is currently only used in the laboratory, Chang Kook Hong, author of the article, is quite sure that this method can be applied on a large scale, explaining: "This device structure allows large-scale device fabrication."
