Revealing Ultrafast Charge-Carrier Thermalization in Tin-Iodide Perovskites through Novel Pump-Push-Probe Terahertz Spectroscopy.

ABSTRACT: Tin-iodide perovskites are an important group of semiconductors for photovoltaic applications, promising higher intrinsic charge-carrier mobilities and lower toxicity than their lead-based counterparts. Controllable tin vacancy formation and the ensuing hole doping provide interesting opportunities to investigate dynamic intraband transitions of charge carriers in these materials. Here, we present for the first time an experimental implementation of a novel Optical-Pump-IR-Push-THz-Probe spectroscopic technique and demonstrate its suitability to investigate the intraband relaxation dynamics of charge carriers brought into nonequilibrium by an infrared "push" pulse. We observe a push-induced decrease of terahertz conductivity for both chemically- and photodoped FA_0.83Cs_0.17<

SUBMITTER: Ulatowski AM 

PROVIDER: S-EPMC8397435 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature