Nanotechnology 2022 May 12. Epub 2022 May 12.
School of Physics, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, CHINA.
The CsSnBr3 photodetectors are fabricated by thermal evaporation and 75°C in-situ annealing, and the effect of in-situ annealing on the morphology, structure, exciton dynamics and photoresponse of thermally evaporated CsSnBr3 films are investigated. Especially, temperature-dependent steady-state photoluminescence (PL) and transient PL decaying have been analyzed in details for understanding the exciton dynamics. Meanwhile, effect of annealing on the activation energy for trap sites (Ea), exciton binding energy (Eb), activation energy for interfacial trapped carriers (ΔE), trap densities and carriers mobilities are studied and the annealed (A-CsSnBr3) reveals obviously lower Eb and trap density together with notably higher carrier mobility than those of the unannealed (UA-CsSnBr3). Read More