Large-area sky-blue perovskite LEDs have been created at the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences. The precursor, a CsPb(Br0.84Cl0.16)3 solution using a custom solvent blend, was blade-coating onto a substrate where the substance crystallised into grains – halide amine additives controlled he growth of perovskite grains and passivate ...

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