Light-Emitting Diodes with Manganese Halide Tetrahedron Embedded in Anti-Perovskites

• Published in: ACS energy letters Vol. 6; no. 5; pp. 1901 - 1911
• Main Authors: Yan, Siyu, Tang, Kaixin, Lin, Yuejian, Ren, Yuanhang, Tian, Wanli, Chen, Hua, Lin, Tingting, Qiu, Longzhen, Pan, Xiaoyong, Wang, Weizhi
• Format: Journal Article
• Language: English
• Published: American Chemical Society 14.05.2021
• ISSN: 2380-8195; 2380-8195
• DOI: 10.1021/acsenergylett.1c00250

The formability of antiperovskite [MX4]­XA3-type (A­(I) = alkali metals; M­(II) = transition metals; X = Cl, Br, I) can be predicted by building the analysis theory. To validate the prediction model, a series of cesium–manganese antiperovskite single crystals with different halogen mixing ratios were synthesized, which not only have [MX4]­XA3-type structures but also are ideal luminescent materials. As the most pure green emission fluorescent antiperovskite, [MnCl2Br2]­BrCs3 shows 520 nm emission with the high photoluminescence quantum yield (93.5%) at room temperature and ultrastable luminescent color from 77 to 523 K due to the strict confinement of high-density luminescent centers. By fabricating the perovskite film with the double-source thermal evaporation method, the first all-inorganic cesium–manganese halide antiperovskite light-emitting diode is reported, with maximum external quantum efficiency up to 12.5%, maximum luminance up to 3990 cd m–2, and half-life of 756 min operated at 5.0 V.