Fig. 2: Optical properties of PeQWs.
a Photograph of blue, sky-blue, green and pure-red light-emitting PeQW arrays under UV irradiation. b Normalized photoluminescence spectra (λex = 350 nm) of our PeQW arrays. c Time-resolved photoluminescence decay curve (λex = 365 nm) measured at corresponding photoluminescence peaks for the corresponding PeQW arrays. d TA spectra of four different PeQW arrays after excitation at 405 nm. e PLQYs of PeQWs and perovskite thin films.
