Heterovalent substitution allows predictive control of luminescent centers and enables optimized performances of LED phosphors. Recent progresses on designing phosphors with high quantum efficiency, improved thermal stability and controllable excitation/emission properties are introduced in article number 1901608 by Lixin Ning, Zhiguo Xia and co‐workers. The cover image illustrates the way by Lu³⁺ substitution to change the local structures of Eu²⁺ in doped K₂HfSi₃O₉ leading to the appearance of green emission with increased intensity.

中文翻译：

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LED荧光粉：通过异价取代策略控制相稳定性来设计高性能LED荧光粉（高级光学材料2/2020）

异价取代可实现对发光中心的预测控制，并实现LED荧光粉的优化性能。宁立新，夏志国及其同事在编号为1901608的文章中介绍了设计具有高量子效率，改善的热稳定性和可控制的激发/发射性质的荧光粉的最新进展。封面图像说明了通过Lu ³⁺替代改变掺杂的K ₂ HfSi ₃ O ₉中Eu ²⁺的局部结构的方式，从而导致绿色发射强度增加。