Zero-Dimensional Organic–Inorganic Hybrid Copper-Based Halides with Highly Efficient Orange–Red Emission,Small

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Zero-Dimensional Organic–Inorganic Hybrid Copper-Based Halides with Highly Efficient Orange–Red Emission
Small ( IF 13.0 ) Pub Date : 2021-09-21 , DOI: 10.1002/smll.202103831
Shaofan Fang ₁ , Henan Li ₂ , Yuelin Xie ₁ , Huixia Li ₃ , Ye Wang ₄ , Yumeng Shi ₁

Affiliation

Lead-free metal halides are promising luminescent materials with low non-toxicity, tunable emission, and high luminescence quantum yield (PLQY). The development of red light-emitting materials with high PLQY to meet the color coordinate requirements for light-emitting diode (LED) lighting and wide color gamut displays remains a major scientific challenge. Herein, novel lead-free copper-based halide materials are reported. PEA₄Cu₄I₄ is an efficient orange–red broad emission with a highest PLQY of 73.6%. All three materials, namely, those of ((R)-(+)-α-PEA)₄Cu₄I₄, ((S)-(–)-α-PEA)₄Cu₄I₄, and (β-PEA)₄Cu₄I₄ with zero-dimensional structures have large exciton binding energies and Huang–Rhys factors, thus causing efficient self-trapped exciton emissions. A prototypical orange–red LED device is fabricated successfully that demonstrates the potential of copper-based halide materials in lighting and display applications.

中文翻译：

具有高效橙红光发射的零维有机-无机杂化铜基卤化物

无铅金属卤化物是具有低无毒、可调发射和高发光量子产率（PLQY）的有前途的发光材料。开发具有高 PLQY 的红色发光材料以满足发光二极管 (LED) 照明和宽色域显示器的色坐标要求仍然是一项重大的科学挑战。在此，报道了新型无铅铜基卤化物材料。PEA ₄ Cu ₄ I ₄是一种高效的橙红色宽发射，最高PLQY 为73.6%。所有三种材料，即((R)-(+)-α-PEA) ₄ Cu ₄ I ₄、((S)-(-)-α-PEA) ₄ Cu ₄ I ₄和(β-豌豆）具有零维结构的₄ Cu ₄ I ₄具有大的激子结合能和黄-理因子，从而导致有效的自陷激子发射。成功制造了典型的橙红色 LED 器件，展示了铜基卤化物材料在照明和显示应用中的潜力。

更新日期：2021-10-21

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