Surface-tailored perovskite light emitters for light-emitting diodes

This study outlines effective surface tailoring strategies for surface and grain boundaries in polycrystalline perovskite thin films by manipulating the crystal nucleation and growth during the solution processing. The successful mitigation of these defective grain boundaries results in a marked reduction in charged trap densities, enhanced environmental stability, and minimized ion migration within the perovskite thin film. Consequently, a noticeable improvement in the operational stability of both solar cells and light-emitting diodes are demonstrated, underscoring the importance of precise control over crystal nucleation and growth in optimizing the performance of metal halide perovskite-based optoelectronic devices.