2016/11/29 by Jarvist M. Frost, Pooya Azarhoosh, Frost, Jarvist M. +7
Engineering · Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Perovskite Materials and Applications #Semiconductor Quantum Structures and Devices #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.1611.09786
openalex publication_date 2016/11/29 · openalex created_date 2022/10/06 · openalex updated_date 2026/07/28
The spin-split indirect bandgap in hybrid-halide perovskites provides a\nmomentum-space realisation of a photon-ratchet intermediate band. Excited\nelectrons thermalise to recombination-protected Rashba pockets offset in\nmomentum space, building up the charge density to have sufficient flux to the\nhigher lying conduction band. This effect could be used to form an intrinsic\nintermediate band solar cell with efficiencies beyond the Shockley-Queisser\nlimit if a selective low-electron affinity contact can be made to the higher\nconduction state. This concept is supported by analysis of the many-body\nelectronic structure. Production of above-bandgap voltages under illumination\nwould affirm the physical mechanism proposed here.\n