Metal halides can produce a broadband emission spectrum of self-trapped excitons (STEs) with a large stokes shift because they have strong electron-phonon coupling and soft lattice. In this study, CsCdCl₃:xSb³⁺ perovskite microcrystals were prepared using a simple co-precipitation strategy at room-temperature. Their composition, morphology and phase structure were characterized by EDS, XPS, SEM and XRD. The result showed that the structure of the CsCdCl₃:xSb³⁺ perovskite microcrystals was hexagonal. In terms of luminescence, the un-doped CsCdCl₃ sample showed a quite broadband emission from the host STEs with a large Stokes shift of 340 nm. The PLE and PL of the CsCdCl₃:0.007Sb³⁺ sample show two absorptions at the wavelength of 300 and 355 nm, which is because of the ¹S₀ → ¹P₁ and ¹S₀ → ³P₁ transitions of Sb³⁺ ions and the enhanced cyan emission from STEs emission of [SbCl₆] octahedra induced by a heterovalent doping strategy, respectively. In addition, in the PL spectra, there are two luminescence centers in the CsCdCl₃:xSb³⁺ samples. The emission peak at 500 nm is higher than that at 600 nm, which can be attributed to the STEs of [SbCl₆] and the two face-sharing octahedra [Sb₂Cl₉], respectively. The formation of STEs can be demonstrated by the large S value. The CsCdCl₃:xSb³⁺ samples undergo two thermal processes, with an activation energy of 127 meV (E_a2) at a high temperature and 101 meV (E_a1) at a low temperature. Finally, they have good thermal and anti-water stability, and thus can be possibly applied in white LED with CIE color coordinates of 0.4119 and 0.3897, the CCT of 3227 K and CRI of 79.3.

金属卤化物可以产生具有大斯托克斯位移的自陷激子 (STE) 的宽带发射光谱，因为它们具有强电子-声子耦合和软晶格。在这项研究中，CsCdCl ₃ : x Sb ³⁺钙钛矿微晶是在室温下使用简单的共沉淀策略制备的。采用EDS、XPS、SEM和XRD对其组成、形貌和相结构进行了表征。结果表明，CsCdCl ₃ : x Sb ³⁺钙钛矿微晶的结构为六方晶系。在发光方面，未掺杂的 CsCdCl ₃样品显示出来自主体 STE 的相当宽带的发射，具有 340 nm 的大斯托克斯位移。_{CsCdCl 3} :0.007Sb ³⁺样品的 PLE 和 PL在 300 和 355 nm 波长处显示出两个吸收，这是因为Sb ^3的1 S ₀ → ¹ P ₁和¹ S ₀ → ³ P ₁跃迁^{+离子和由异价掺杂策略引起的 [SbCl} ₆ ] 八面体的 STEs 发射增强的青色发射，分别。此外，在 PL 光谱中，CsCdCl ₃中有两个发光中心：xSb ³⁺样品。500 nm处的发射峰高于600 nm处的发射峰，这可分别归因于[SbCl ₆ ]和两个共面八面体[Sb ₂ Cl ₉ ]的STE。大的S值可以证明 STE 的形成。CsCdCl ₃ : x Sb ³⁺样品经历了两个热处理过程，高温活化能为 127 meV ( E _{a2 ) 和 101 meV (} E _a1) 在低温下。最后，它们具有良好的热稳定性和抗水稳定性，因此可以应用于CIE色坐标为0.4119和0.3897、CCT为3227 K、CRI为79.3的白光LED。