All-Inorganic CsCu2I3 Single Crystal with High-PLQY (≈15.7%) Intrinsic White-Light Emission via Strongly Localized 1D Excitonic Recombination
All-Inorganic CsCu2I3 Single Crystal with High-PLQY (≈15.7%) Intrinsic White-Light Emission via Strongly Localized 1D Excitonic Recombination
复制标题
全无机%20CsCu2I3%20单一%20晶体%20with%20高PLQY%20（约%20至%2015.7%）%20本征%20白光%20发射%20via%20强%20局域化%201D%20激子%20复合
DOI：
10.1002/adma.201905079
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发表时间：
2019-10-03
影响因子：
29.4
通讯作者：
Huang, Feng
中科院分区：
文献类型：
--
作者：
Lin, Richeng;Guo, Quanlin;Huang, Feng
半导体高效本征发光的节能白色照明被认为是下一代照明光源。目前，白光发射可以与蓝色发光二极管和黄色磷光体复合。然而，这种解决方案具有不可避免的光损失，这使得能量利用效率的提高更加困难。为了解决这个问题，单一固体材料中的固有白光发射（IWE）提供了一种可能性。在这里，一个全无机无铅CsCu 2 I3钙钛矿单晶（SC）具有稳定和高的光致发光量子产率（约15.7%）IWE通过强烈的本地化一维激子复合合成。在CsCu_2 I_3中，提供大部分电子态的Cu-Ⅰ八面体被Cs原子在两个方向上隔离，形成一维电子结构，导致激子的高辐射复合率。通过这种电子结构设计，CsCu 2 I 3太阳能电池在节能白色照明方面具有很大的潜力。
Energy-saving white lighting from the efficient intrinsic emission of semiconductors is considered as a next-generation lighting source. Currently, white-light emission can be composited with a blue light-emitting diode and yellow phosphor. However, this solution has an inevitable light loss, which makes the improvement of the energy utilization efficiency more difficult. To deal with this problem, intrinsic white-light emission (IWE) in a single solid material gives a possibility. Here, an all-inorganic lead-free CsCu2I3 perovskite single crystal (SC) with stable and high photoluminescence quantum yield (approximate to 15.7%) IWE through strongly localized 1D exciton recombination is synthesized. In the CsCu2I3, the Cu-I octahedron, which provides most of electron states, is isolated by Cs atoms in two directions to form a 1D electronic structure, resulting a high radiation recombination rate of excitons. With this electronic structure design, the CsCu2I3 SCs have great potential in energy-saving white lighting.