One-step solution synthesis of white-light-emitting films via dimensionality control of the Cs-Cu-I system
One-step solution synthesis of white-light-emitting films via dimensionality control of the Cs-Cu-I system
复制标题
DOI：
10.1063/1.5127300
复制
发表时间：
2019-11-01
期刊：
影响因子：
6.1
通讯作者：
Hosono, Hideo
中科院分区：
文献类型：
--
作者：
Jun, Taehwan;Handa, Taketo;Hosono, Hideo
低维无铅发光卤化物已经成为非常有前途的白光发射磷光体。最近，我们报道了一种宽带蓝光发射的碘化铜（I）基材料，Cs3Cu2I5，具有高光致发光量子产率（PLQY）（类似于90%）和零维性质，为光活性位点提供了显着的维数。然而，由于黄光发射不足，该材料不足以作为白光发射体。在本文中，我们报告了一种新的黄色荧光粉，CsCu_2I_3，具有一维结构的光活性位。该材料表现出中心在类似于560 nm处的宽带发射，PLQY类似于8%。我们展示了具有白光发射的薄膜，其可以使用一维CsCu2I3（黄色）和一维Cs3Cu2I5（蓝色）的混合前体溶液的一步旋涂来制造。(C)2019年作者。
Low-dimensional lead-free luminescent halides have emerged as highly promising phosphors for white-light emission. Recently, we reported a broadband blue-emitting copper(I) iodide-based material, Cs3Cu2I5, with a high photoluminescence quantum yield (PLQY) (similar to 90%) and a zero-dimensional nature, providing significant dimensionality for the photoactive site. However, this material is insufficient as a white-light emitter owing to the deficient yellow emission. In this paper, we report a novel yellow luminescent phosphor, CsCu2I3, with a 1D structure for the photoactive site. This material exhibits a broadband emission centered at similar to 560 nm with a PLQY of similar to 8%. We demonstrate a thin film with white-light emission that can be fabricated using one-step spin-coating of a mixed precursor solution of 1D CsCu2I3 (yellow) and 0D Cs3Cu2I5 (blue). (C) 2019 Author(s).