Additive effects of alkali metals on Cu-modified CH₃NH₃PbI_3-δ Cl _δ photovoltaic devices.

ABSTRACT: We investigated the addition of alkali metal elements (namely Na⁺, K⁺, Rb⁺, and Cs⁺) to Cu-modified CH₃NH₃PbI_3-δ Cl _δ photovoltaic devices and their effects on the photovoltaic properties and electronic structure. The open-circuit voltage was increased by CuBr₂ addition to the CH₃NH₃PbI_3-δ Cl _δ precursor solution. The series resistance was decreased by simultaneous addition of CuBr₂ and RbI, which increased the external quantum efficiencies in the range of 300-500 nm, and the short-circuit current density. The energy gap of the perovskite crystal increased through CuBr₂ addition, which we also confir

SUBMITTER: Ueoka N 

PROVIDER: S-EPMC9069633 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature