Fig. 1: Nondestructive halide exchange strategy. | Nature Communications

Fig. 1: Nondestructive halide exchange strategy.

From: Nondestructive halide exchange via SN2-like mechanism for efficient blue perovskite light-emitting diodes

Fig. 1: Nondestructive halide exchange strategy.

a Schematic diagram of nondestructive halide exchange strategy. b PL spectra of pristine and solvent post-treated perovskite films. c TRPL spectra of pristine and solvent post-treated perovskite films. d Top-view SEM images of pristine and solvent post-treated perovskite films. Scale bars: 500 nm. e PL and absorption spectra of BAX-based CF post-processed BABr0.7Cl0.3, BABr0.4Cl0.6 and BABr0.1Cl0.9 films, which achieve sky-, pure-, and deep-blue emission, respectively.

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