High-Efficiency Light-Emitting Diodes of Organometal Halide Perovskite Amorphous Nanoparticles
High-Efficiency Light-Emitting Diodes of Organometal Halide Perovskite Amorphous Nanoparticles
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DOI：
10.1021/acsnano.6b01540
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发表时间：
2016-07-01
期刊：
影响因子：
17.1
通讯作者：
Xiong, Qihua
中科院分区：
文献类型：
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作者：
Xing, Jun;Yan, Fei;Xiong, Qihua
有机金属卤化物钙钛矿最近成为一种非常有前途的材料家族，在电子和光电应用（包括光伏器件、光电探测器和发光二极管）中具有增强的性能。在此，我们提出并演示了一系列具有无定形结构的胶体有机金属卤化物钙钛矿 CH3NH3PbX3（X = 卤化物）纳米颗粒的简便溶液合成，该纳米颗粒具有高量子产率和从紫外到近红外的可调谐发射。详细研究了钙钛矿非晶纳米颗粒的生长机理和光致发光性能。展示了一种基于非晶CH3NH3PbBr3纳米颗粒的高效绿色发光二极管。钙钛矿非晶纳米粒子基发光二极管的发光效率为11.49 cd/A，功率效率为7.84 Im/W，外量子效率为3.8%，比之前报道的最好的胶体钙钛矿量子点基发光二极管高3.5倍。我们的研究结果表明胶体钙钛矿非晶纳米粒子在发光器件中的巨大潜力。关键词: 有机金属卤化物钙钛矿, 纳米颗粒, 发光二极管, 电致发光, 光致发光显示最大值
Organometal halide perovskite has recently emerged as a very promising family of materials with augmented performance in electronic and optoelectronic applications including photovoltaic devices, photodetectors, and light-emitting diodes. Herein, we propose and demonstrate facile solution synthesis of a series of colloidal organometal halide perovskite CH3NH3PbX3 (X = halides) nanoparticles with amorphous structure, which exhibit high quantum yield and tunable emission from ultraviolet to near-infrared. The growth mechanism and photoluminescence properties of the perovskite amorphous nanoparticles were studied in detail. A high-efficiency green light -emitting diode based on amorphous CH3NH3PbBr3 nano particles was demonstrated. The perovskite amorphous nanoparticle-based light -emitting diode luminous efficiency of 11.49 cd/A, a power efficiency of 7.84 Im/W, and an external quantum efficiency of 3.8%, which is 3.5 times higher than that of the best colloidal perovskite quantum-dot-based light -emitting diodes previously reported. Our findings indicate the great potential of colloidal perovskite amorphous nanoparticles in light-emitting devices. KEYWORDS: organometal halide perovskite, nanoparticles, light-emitting diodes, electroluminescence, photoluminescence shows a maximum