Pyrene‐Based Small‐Molecular Hole Transport Layers for Efficient and Stable Narrow‐Bandgap Perovskite Solar Cells
Solar RRL Wiley 5:10 (2021)
Mixed lead-tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
Chemical Science Royal Society of Chemistry 12:40 (2021) 13513-13519
Abstract:
Mixed lead–tin (Pb–Sn) halide perovskites with optimum band gaps near 1.3 eV are promising candidates for next-generation solar cells. However, the performance of solar cells fabricated with Pb–Sn perovskites is restricted by the facile oxidation of Sn(II) to Sn(IV), which induces self-doping. Maltol, a naturally occurring flavor enhancer and strong metal binding agent, was found to effectively suppress Sn(IV) formation and passivate defects in mixed Pb–Sn perovskite films. When used in combination with Sn(IV) scavenging, the maltol surface treatment led to high-quality perovskite films which showed enhanced photoluminescence intensities and charge carrier lifetimes in excess of 7 μs. The scavenging and surface treatments resulted in highly reproducible solar cell devices, with photoconversion efficiencies of up to 21.4% under AM1.5G illumination.Band engineering of nickel oxide interfaces and connection between absolute valence energy alignment and surface dipoles in halide perovskite heterostructures
Fundacio Scito (2021)
Identification of lead vacancy defects in lead halide perovskites
Nature Communications Springer Nature 12:1 (2021) 5566
Universal Current Losses in Perovskite Solar Cells Due to Mobile Ions
Advanced Energy Materials Wiley 11:34 (2021)