Dual Passivation technique yields perovskite solar cells with 20.14% efficiency
Researchers from the Shaanxi Normal University in China have designed a perovskite solar cell based on methylammonium lead iodide (MAPbI3) through a dual passivation technique that simultaneously passivates trap defects in both the perovskite and electron transport layer (ETL) films.
'So far, most techniques for modifying perovskite solar cells focus on either the perovskite or electron transport layer,' the research group reported, noting that the ETL must have decent optical transmittance and high electron mobility to extract photo'induced carriers and contribute to the solar cell efficiency.