Spectral Red Shift of Cs 4 Mn(Bi 1– x In x ) 2 Cl 12 Layered Double Perovskite by Adjusting the Microstructure of the [MnCl 6 ] 4– Octahedron

作者：Shuangshuang He, Shuangqiang Fang, Tao Han, Tianchun Lang, Mingsheng Cai, Houjiang You, Lingling Peng, Shixiu Cao, Bitao Liu, Qinping Qiang, Junyang Chen, Bingfu Lei · 发表于：The Journal of Physical Chemistry C · 年份：2021 · DOI：10.1021/acs.jpcc.1c05089 · 被引用次数：18 · 研究领域：Perovskite Materials and Applications、Solid-state spectroscopy and crystallography、Luminescence Properties of Advanced Materials

As a non-toxic substitute for lead halide perovskite, layered perovskite has attracted great attention recently. In this work, it is reported that tunable visible light emission properties are given in direct band gap Cs 4 MnBi 2 Cl 12 by doping In 3+ ions. When the Bi 3+ ion is replaced with the In 3+ ion with a relatively small ion radius, it causes distortion of the [MnCl6] 4– octahedron, which changes the local crystal field strength of the Mn 2+ ion, and makes the emission band centered at 606 nm gradually red-shift to 616 nm. By employing Cs 4 MnBi 2 Cl 12 and Cs 4 Mn(Bi 0.88 In 0.12 ) 2 Cl 12 as red-emitting phosphors, LED-1 with Ra = 82 and CCT = 4510 K and LED-2 with Ra = 86 and CCT = 4280 K were obtained, respectively. Compared with Cs 4 MnBi 2 Cl 12, Cs 4 Mn(Bi 0.88 In 0.12 ) 2 Cl 12 contributes a wider color gamut of 76.4% NTSC for LED devices, than that of 74% NTSC, as R9 increases from 65 to 72. The current work provides a new direction for the regulation of optoelectronic properties in layered double perovskite.