In 2019,RSC Advances included an article by Ueoka, Naoki; Oku, Takeo; Suzuki, Atsushi. Reference of Cupric bromide. The article was titled 《Additive effects of alkali metals on Cu-modified CH3NH3PbI3-δClδ photovoltaic devices》. The information in the text is summarized as follows:
We investigated the addition of alkali metal elements (namely Na+, K+, Rb+, and Cs+) to Cu-modified CH3NH3PbI3-δClδ photovoltaic devices and their effects on the photovoltaic properties and electronic structure. The open-circuit voltage was increased by CuBr2 addition to the CH3NH3PbI3-δClδ 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 c.d. The energy gap of the perovskite crystal increased through CuBr2 addition, which we also confirmed by first-principles calculations Charge carrier generation was observed in the range of 300-500 nm as an increase of the external quantum efficiency, owing to the partial d. of states contributed by alkali metal elements. Calculations suggested that the Gibbs energies were decreased by incorporation of alkali metal elements into the perovskite crystals. The conversion efficiency was maintained for 7 wk for devices with added CuBr2 and RbI. In the experimental materials used by the author, we found Cupric bromide(cas: 7789-45-9Reference of Cupric bromide)
Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Reference of Cupric bromide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”