具有有机金属卤化物钙钛矿-聚合物复合发射器的可拉伸发光二极管。
Stretchable Light-Emitting Diodes with Organometal-Halide-Perovskite-Polymer Composite Emitters.
机构信息
Department of Industrial and Manufacturing Engineering, High-Performance Materials Institute, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, 32310, USA.
Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, USA.
出版信息
Adv Mater. 2017 Jun;29(23). doi: 10.1002/adma.201607053. Epub 2017 Apr 7.
Intrinsically stretchable light-emitting diodes (LEDs) are demonstrated using organometal-halide-perovskite/polymer composite emitters. The polymer matrix serves as a microscale elastic connector for the rigid and brittle perovskite and induces stretchability to the composite emissive layers. The stretchable LEDs consist of poly(ethylene oxide)-modified poly(3,4-ethylenedioxythiophene) polystyrene sulfonate as a transparent and stretchable anode, a perovskite/polymer composite emissive layer, and eutectic indium-gallium as the cathode. The devices exhibit a turn-on voltage of 2.4 V, and a maximum luminance intensity of 15 960 cd m at 8.5 V. Such performance far exceeds all reported intrinsically stretchable LEDs based on electroluminescent polymers. The stretchable perovskite LEDs are mechanically robust and can be reversibly stretched up to 40% strain for 100 cycles without failure.
采用有机金属卤化物钙钛矿/聚合物复合材料发射器展示了本征可拉伸发光二极管 (LED)。聚合物基质作为刚性和脆性钙钛矿的微尺度弹性连接器，并使复合发射层具有拉伸性。可拉伸的 LED 由聚(氧化乙烯)改性聚(3,4-亚乙基二氧噻吩)聚苯乙烯磺酸盐作为透明和可拉伸的阳极、钙钛矿/聚合物复合材料发射层以及共晶铟镓作为阴极组成。该器件的开启电压为 2.4 V，在 8.5 V 时最大亮度强度为 15960 cd m。这种性能远远超过了所有基于电致发光聚合物的报道的本征可拉伸 LED。可拉伸钙钛矿 LED 机械坚固，可在 100 个循环中在 40%的应变下进行可逆拉伸而不会失效。
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