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Cs4PbBr6/CsPbBr3 Nanocomposites for All-Inorganic Electroluminescent Perovskite Light-Emitting Diodes
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-11-24 , DOI: 10.1021/acsanm.0c02274
Chun-Yuan Huang, Shu-Han Huang, Chin-Lin Wu, Zi-Hao Wang, Chih-Chiang Yang

In this study, the facile synthesis and electroluminescent perovskite light-emitting diodes (PeLEDs) of highly luminescent Cs4PbBr6/CsPbBr3 nanocomposite has been demonstrated. With the addition of proper antisolvents, the nanocomposite with a production yield of >90% and quantum yield of >85% was readily derived from the transformation of CsPbBr3 powder. The obtained high quantum yield of the green nanocomposite originated from the fluorescent CsPbBr3 nanocrystals embedded in the Cs4PbBr6 matrix, which was verified by X-ray diffraction, absorption, photoluminescence (PL), and PL excitation spectra. The addition of large cation precursors, such as CsBr and CH(NH2)2Br, could contribute to the transformation efficiency and had no influence on the composition of the embedded nanocrystals. Via the thermal evaporation of the nanocomposite, all-inorganic electroluminescent PeLEDs with CuSCN and Cu-doped NiOx (NiOx:Cu) nanoparticles were fabricated and characterized. A maximum luminance of 1780 cd/m2 and efficiency of 0.43 cd/A were achieved. Thus, the luminescent Cs4PbBr6/CsPbBr3 nanocomposite is a promising material for next-generation displays and lighting.

中文翻译:

用于全无机电致钙钛矿发光二极管的Cs 4 PbBr 6 / CsPbBr 3纳米复合材料

在这项研究中,已证明了高发光Cs 4 PbBr 6 / CsPbBr 3纳米复合材料的便捷合成和电致发光钙钛矿发光二极管(PeLED)。通过添加适当的抗溶剂,可以轻松地从CsPbBr 3粉末的转化中获得纳米复合材料,其产率> 90%,量子产率> 85%。获得的绿色纳米复合材料高量子产率源自嵌入在Cs 4 PbBr 6中的荧光CsPbBr 3纳米晶体。基质,通过X射线衍射,吸收,光致发光(PL)和PL激发光谱进行了验证。添加较大的阳离子前体,例如CsBr和CH(NH 22 Br,可以提高转化效率,并且对嵌入的纳米晶体的组成没有影响。通过纳米复合材料的热蒸发,制备并表征了具有CuSCN和Cu掺杂的NiO x(NiO x:Cu)纳米粒子的全无机电致发光PeLED 。获得了最大亮度1780 cd / m 2和效率0.43 cd / A。因此,发光Cs 4 PbBr 6 / CsPbBr 3 纳米复合材料是用于下一代显示器和照明的有前途的材料。
更新日期:2020-12-24
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