Blue-Green Color Tunable Solution Processable Organolead Chloride-Bromide Mixed Halide Perovskites for Optoelectronic Applications.
Blue-Green Color Tunable Solution Processable Organolead Chloride-Bromide Mixed Halide Perovskites for Optoelectronic Applications.
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蓝绿色可调节溶液可加工的有机氯 - 溴化物混合卤化物钙钛矿，用于光电应用。
DOI：
10.1021/acs.nanolett.5b02369
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发表时间：
2015-09-09
期刊：
影响因子：
10.8
通讯作者：
Friend RH
中科院分区：
文献类型：
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作者：
Sadhanala A;Ahmad S;Zhao B;Giesbrecht N;Pearce PM;Deschler F;Hoye RL;Gödel KC;Bein T;Docampo P;Dutton SE;De Volder MF;Friend RH
制备的溶液处理的有机卤化铅钙钛矿具有清晰的、颜色纯净的电致发光，其可以从可见光谱的蓝色区域（425-570 nm）调谐到绿色区域。这是通过控制CH 3 NH3 Pb（BrxCl 1-x）3 [0 ≤ x ≤ 1]钙钛矿的卤化物组成来实现的。带隙和晶格参数随组成单调变化。该薄膜具有非常尖锐的带边和一个干净的带隙，与一个单一的光学活性相。这些氯溴钙钛矿可以潜在地用于光电器件，如太阳能电池和发光二极管（LED）。在这里，我们使用这些钙钛矿材料的薄膜展示了具有窄发射半峰全宽（FWHM）和低开启电压的高色纯度可调谐LED，包括具有5 nm窄发射FWHM的蓝色CH 3 NH3 PbCl 3钙钛矿LED。
Solution-processed organo-lead halide perovskites are produced with sharp, color-pure electroluminescence that can be tuned from blue to green region of visible spectrum (425–570 nm). This was accomplished by controlling the halide composition of CH3NH3Pb(BrxCl1–x)3 [0 ≤ x ≤ 1] perovskites. The bandgap and lattice parameters change monotonically with composition. The films possess remarkably sharp band edges and a clean bandgap, with a single optically active phase. These chloride–bromide perovskites can potentially be used in optoelectronic devices like solar cells and light emitting diodes (LEDs). Here we demonstrate high color-purity, tunable LEDs with narrow emission full width at half maxima (FWHM) and low turn on voltages using thin-films of these perovskite materials, including a blue CH3NH3PbCl3 perovskite LED with a narrow emission FWHM of 5 nm.