Recently, low-dimensional organic–inorganic hybrid metal halides have attracted considerable attention in solid-state optical application fields, especially in white-light emitting diodes (WLEDs) owing to intrinsic broadband luminescence performances. Herein, by selecting different types of organic cations as a structural decoration strategy, we designed a series of new 1D hybrid halides of A₂Pb₃Br₁₀ (A = NPM, DMPDA, TMEN) based on same [Pb₃Br₁₀]⁴⁻ chains composed of edge-shared [Pb₃Br₁₂]⁶⁻ trimers. The low-dimensional crystal lattice results in the formation of self-trapped excitons, which leads to broadband light emissions covering the entire visible region for all A₂Pb₃Br₁₀ homologues. Specifically, compound 1 exhibits yellowish-white light emission (0.34, 0.45) with a photoluminescence quantum efficiency of 2.51%. Both compounds 2 and 3 show bluish-white light emissions centered at 438 nm and 440 nm, respectively, with high color rendering index (CRI) of 96, which belongs to one of the highest values to date. The intrinsic broadband white light emissions enable them as promising candidates for single-component white-light emitting materials.

中文翻译：

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有机阳离子定向的1D [Pb3Br10] 4-链：合成，晶体结构和光致发光性质

近来，由于固有的宽带发光性能，低维有机-无机杂化金属卤化物在固态光学应用领域，尤其是在白光发光二极管（WLED）中引起了相当大的关注。本文中，通过选择不同类型的有机阳离子作为结构装饰策略，我们基于相同的[Pb ₃ Br ₁₀ ] ⁴设计了一系列新的A ₂ Pb ₃ Br ₁₀（A = NPM，DMPDA，TMEN）一维杂化卤化物。⁻由边缘共享的[Pb ₃ Br ₁₂ ] ^6-组成的链三聚体。低维晶格会导致自陷激子的形成，从而导致宽带光发射覆盖所有A ₂ Pb ₃ Br ₁₀同源物的整个可见光区域。具体地，化合物1表现出黄白色发光（0.34，0.45），光致发光量子效率为2.51％。化合物2和3均显示出分别在438 nm和440 nm处居中的蓝白色光发射，且显色指数（CRI）为96，属于迄今为止的最高值之​​一。固有的宽带白光发射使其成为单组分白光发射材料的有希望的候选者。