The structural and photophysical properties of the 2D layered metal halides (4F-PMA)2GeI4 and (4F-PMA)2PbI4 are reported. For the Ge composition, reduced exciton-phonon coupling is found and the abse....

Interface engineering is promising for advancing perovskite solar cell (PSC) performance and longevity. This Review highlights three emerging strategies for interfacial optimization in PSCs: multifunctional molecular passivation, heterostructures and self-assembled monolayers. The authors discuss relevant materials, assess their limitations and outline challenges and prospective directions for future research.

Chalcohalide semiconductors are rapidly gaining traction as stable, biocompatible materials for energy conversion applications. While the solid-state synthesis of bulk chalcohalides is relatively well...

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