二维钙钛矿的宽带发射引起了人们对单组分白光二极管的兴趣。二维钙钛矿(PEA)₂PbBr₂Cl₂和(C₆H₁₈N₂O₂)PbBr₄具有软晶格特性，因而能产生很强的光声耦合作用，使得受激产生的电子–空穴对（激子）很容易引起晶格畸变从而被晶格捕获，形成自陷激子（self-trapping excitons，STEs），发射出全光谱白光。研究表明：这2种材料的半高全宽可以达到232 nm和194 nm；斯托克斯位移分别为182 nm和198 nm；荧光寿命为9.812 ns和13.465 ns。它们在CIE色度图上坐标分别为（0.36，0.40）和（0.40，0.44），显色指数（color rendering indexes，CRI）为86.93和82.23。基于这2种钙钛矿，结合商用的紫外LED，制成的复合型LED色温在5000 K左右，为设计单组分白光二极管提供了新的思路和方法。

White light, which contains polychromic visible components, affects the rhythm of organisms and has the potential for advanced applications of lighting, display, and communication. Compared with traditional incandescent bulbs and inorganic diodes, pure organic materials are superior in terms of better compatibility, flexibility, structural diversity, and environmental friendliness. In the past few years, polychromic emission has been obtained based on organic aggregates, which provides a platform to achieve white-light emission. Several white-light emitters are sporadically reported, but the underlying mechanistic picture is still not fully established. Based on these considerations, we will focus on the single-component and multicomponent strategies to achieve efficient white-light emission from pure organic aggregates. Thereinto, single-component strategy is introduced from four parts: dual fluorescence, fluorescence and phosphorescence, dual phosphorescence with anti-Kasha’s behavior, and clusteroluminescence. Meanwhile, doping, supramolecular assembly, and cocrystallization are summarized as strategies for multicomponent systems. Beyond the construction strategies of white-light emitters, their advanced representative applications, such as organic light-emitting diodes, white luminescent dyes, circularly polarized luminescence, and encryption, are also prospected. It is expected that this review will draw a comprehensive picture of white-light emission from organic aggregates as well as their emerging applications.

为克服因混合不同卤化物钙钛矿量子点发生阴离子交换反应、不稳定的红光发射卤化物钙钛矿量子点等而导致在获取白光发射方面存在的不足，提出了一种可以在大气环境下合成Tb³⁺，Eu³⁺稀土离子共掺杂全无机卤化物钙钛矿量子点的方法。调节Tb³⁺，Eu³⁺稀土离子的掺杂比例，调控从钙钛矿量子点主晶格到Tb³⁺和Eu³⁺离子的能量转移，获得了单一组分、白光发射的钙钛矿量子点（Tb，Eu）：CsPbCl₃和（Tb，Eu）：CsPb（Cl/Br）₃，并对量子点的形貌、结构、发光性能及能量传递机理和稳定性进行了详细研究。研究结果表明：在365nm激光激发下，不同含量Tb³⁺/Eu³⁺离子共掺杂的钙钛矿量子点（Tb，Eu）：CsPbCl₃发射光谱对应的色坐标位于1 931色度图中的白光区域。在进料比PbCl₂∶TbCl₃∶EuCl₃为1∶1.5∶1时，量子产率为3.59%，比纯的CsPbCl₃量子点的量子产率（0.57%）提高了6倍。进一步研究发现，该（Tb，Eu）：CsPbCl₃量子点在空气中储存2个月之后，量子产率几乎保持不变（3.63%），保持了良好的稳定性。此外，研究了采用不同溶剂（正辛烷、十八烯）合成Tb³⁺/Eu³⁺共掺杂钙钛矿量子点的发光特性。Tb³⁺/Eu³⁺离子共掺杂的钙钛矿量子点（Tb，Eu）：CsPbCl₃可实现单一组分的白光发射，有良好的稳定性，具备一定的应用前景。