Highly luminescent tin-doped manganese halide perovskite nanocrystals for high-resolution patterning and light-emitting diodes

Abstract

Lead halide perovskites have been attracting intense interest in optoelectronic fields, which are attributed to their excellent physical properties, such as highly efficient emission, tunable bandgap, high color purity, etc. And yet, the lead toxicity and stability problems seriously restrict the practical application of lead halide perovskites. Herein, the lead-free Sn2+ doped manganese halide (CsMnCl3:Sn2+) perovskite nanocrystals were successfully synthesized and displayed strong red emission under the excitation of ultraviolet light. The introducing of modicum Sn2+ into CsMnCl3 nanocrystals would lead to a significant increase in photoluminescence quantum yield from 12 % to 49 %, ascribing to the efficient energy transfer from [SnCl6]4− to Mn2+ ions emission center. Moreover, the CsMnCl3:Sn2+ nanocrystals exhibit distinguished stability under harsh conditions such as high temperature, ultraviolet irradiation, and long-time storage. Benefiting from the highly efficient luminescent property and excellent stability of CsMnCl3:Sn2+ nanocrystals, the CsMnCl3:Sn2+ based white LED exhibits high luminous efficiency (78.3 lm/W) and outstanding operating stability, demonstrating their great potential in LED applications. And the high-resolution patterning results further demonstrate their potential for next-generation display applications such as micro/mini-LEDs.