All-inorganic Cs2CuX4 (X = Cl, Br, and Br/I) perovskite quantum dots with blue-green luminescence

Highly photoluminescent all-inorganic copper based perovskite Cs2CuX4 (X = Cl, Br, and Br/I) quantum dots (QDs) were facilely synthesized and investigated for the first time. These perovskite QDs exhibited high quantum yield for blue-green light and excellent stability, while the particle size and photoluminescence wavelength could be tuned via the molar ratio of the raw materials.