【摘要】 全无机镉基金属卤化物CsCdCl₃因其独特的三维晶体结构而具有优异的稳定性、宽带自陷激子（Selftrapped excitons,STEs）发射和丰富的离子掺杂格位，在固态照明领域引起了广泛关注。然而，基于八面体畸变的STEs辐射复合的发光效率较低。本文采用简单的室温溶液法制备了一系列Mn²⁺离子掺杂的六方相CsCdCl₃∶x%Mn微米晶。在254 nm紫外光激发下，Mn²⁺掺杂的样品发出明亮的橙黄光，发射峰位于598 nm处，半峰宽为75 nm，荧光量子产率最高达99.1%。稳态和瞬态荧光光谱测试结果表明，Mn²⁺掺杂CsCdCl₃微米晶的宽光谱发射源自基质的STEs和Mn²⁺离子的d-d跃迁。同时，该材料还具备优异的空气、热、水稳定性。我们进一步将CsCdCl₃∶5%Mn²⁺荧光粉、商用荧光粉、深紫外或蓝光LED芯片封装成两种白光发光二极管器件，色度坐标分别为（0.36,0.35）和（0.40,0.36），显色指数分别高达91和83，有望成为新一代发光材料用于照明领域。更多还原

【Abstract】 Owing to its excellent stability and wide self-trapped excitons（STEs）emission induced by the special three-dimensional（3D）crystal structure, all inorganic cadmium-based metal halide perovskite CsCdCl₃ has attracted broad attention in the field of solid-state lighting. However, the luminescence efficiency through radiative recombination of STEs is not high. Herein, a serious of Mn²⁺-doped hexagonal CsCdCl₃∶x%Mn microcrystals were prepared by a facial room-temperature solution method. Under 254 nm UV excitation, CsCdCl₃ microcrystals after Mn²⁺ doping show bright orange-yellowish emission peaking at about 598 nm with a full width at half-maximum of 75 nm and the photoluminescence quantum yield of 99. 1%. Steady-state and transient photoluminescence results suggest that the broad emission is originating from the matrix STEs and the Mn²⁺ dopant. Meanwhile, the as-synthesized materials also display excellent air, heat, and water stability. Two white light-emitting diodes（LEDs）were further fabricated by integrating a mixture of CsCdCl₃∶5%Mn and commercial phosphors on a deep UV LED and a blue LED, which demonstrate bright white light with CIE coordinates of（0. 36, 0. 35） and（0. 40, 0. 36）, high color rendering indices of 91 and 83, respectively. The synthesized Mn²⁺-doped CsCdCl₃ phosphor holds great promise for new-generation luminescent materials in the field of lighting.更多还原