Artem Bakulin

Sep 15, 2024 | nature.com | Junzhi Ye |Navendu Mondal |Ben P. Carwithen |Linjie Dai |Jian Qiang Mao |Pratyush Ghosh | +8 more

AbstractDefect tolerance is a critical enabling factor for efficient lead-halide perovskite materials, but the current understanding is primarily on band-edge (cold) carriers, with significant debate over whether hot carriers can also exhibit defect tolerance. Here, this important gap in the field is addressed by investigating how intentionally-introduced traps affect hot carrier relaxation in CsPbX3 nanocrystals (X = Br, I, or mixture).

Nov 19, 2023 | nature.com | Artem Bakulin |Navendu Mondal |Ben P. Carwithen

AbstractHot carrier cooling is slowed down upon alloying tin in lead-halide perovskite nanocrystals through the engineering of carrier-phonon and carrier-defect interactions. In semiconductors, incident photons possessing energies equal to or greater than the bandgap transit electrons between the valence and conduction bands, leading to the formation of mobile free carriers.