荧光粉
色度
光电子学
化学
可见光谱
紫外线
发光二极管
固态照明
卤化物
色温
二极管
磷光
紫外线
光学
宽带
荧光
光化学
材料科学
物理
无机化学
作者
Emma R. Dohner,Eric T. Hoke,Hemamala I. Karunadasa
摘要
We use organic cations to template the solution-state assembly of corrugated lead halide layers in bulk crystalline materials. These layered hybrids emit radiation across the entire visible spectrum upon ultraviolet excitation. They are promising as single-source white-light phosphors for use with ultraviolet light-emitting diodes in solid-state lighting devices. The broadband emission provides high color rendition and the chromaticity coordinates of the emission can be tuned through halide substitution. We have isolated materials that emit the “warm” white light sought for many indoor lighting applications as well as “cold” white light that approximates the visible region of the solar spectrum. Material syntheses are inexpensive and scalable and binding agents are not required for film deposition, eliminating problems of binder photodegradation. These well-defined and tunable structures provide a flexible platform for studying the rare phenomenon of intrinsic broadband emission from bulk materials.
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