我室张洪良教授和杨晔在 JPCL 上发表论文：Recombination of Polaronic Electron–Hole Pairs in Hematite Determined by Nuclear Quantum Tunneling

摘要：Here, we investigate the intrinsic nonradiative recombination mechanism in hematite single crystals that decides the photocarrier lifetime under solar illumination. On the basis of the small polaron theory, we propose that the photogenerated electron–hole pair along with its induced lattice deformation in hematite could be treated as a pseudocoordination-complex (PCC) dispersed in a solid medium. We demonstrate that the nonradiative recombination rate at different temperatures determined from the transient absorption spectroscopy can be excellently described by the nonradiative transition theory developed previously for parallels of the PCC model. Our finding suggests that at room temperature the nonradiative recombination in hematite substantially depends on the probability of quantum tunneling of the nuclear configuration.

文章链接：https://pubs.acs.org/doi/10.1021/acs.jpclett.1c01060