Alloying Effects on Charge-Carrier Transport in Silver-Bismuth Double Perovskites.

ABSTRACT: Alloying is widely adopted for tuning the properties of emergent semiconductors for optoelectronic and photovoltaic applications. So far, alloying strategies have primarily focused on engineering bandgaps rather than optimizing charge-carrier transport. Here, we demonstrate that alloying may severely limit charge-carrier transport in the presence of localized charge carriers (e.g., small polarons). By combining reflection-transmission and optical pump-terahertz probe spectroscopy with first-principles calculations, we investigate the interplay between alloying and charge-carrier localization in Cs₂AgSb_xBi_1-xBr₆ double perovskite thin films. We show that the charge-carrier transport regime strongly determines the impact of alloying o

SUBMITTER: Righetto M 

PROVIDER: S-EPMC10683067 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature