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《Chinese Journal of Luminescence》 2012-12
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Influence of Agglomeration in CdSe/ZnS Quantum Dot on The Performances of Light-emitting Diode

WANG Li,RONG Jia-ling,CAO Jin,ZHU Wen-qing,ZHANG Jian-hua (Key Laboratory of Advanced Display and System Application,EMC,Shanghai University,Shanghai 200072,China)  
Light-emitting diodes containing multilayer laminated structure are fabricated by spin-coating CdSe/ZnS quantum dots(QD) films as emitting layer.The dependences of process conditions and parameters on the electroluminescence and the QD film morphology are researched by using atomic force microscopy.The results show that with the increased thickness of QD,the multi-layer nano-particle films are formed,which leads to the QD nano-particles agglomerate and the brightness of device decrease.In addition,the annealing temperature of the QD layer has an important impact on the device brightness.When annealing temperature is low,the device shows poor performance due to the solvent volatized incompletely.When annealing temperature is above 150 ℃,the heat generated from annealing will cause the agglomeration of the QD nano-particles and then the performances of devices decline.
【Fund】: 上海市科委项目(11100703200);; 上海自然科学基金(09ZR1411900)资助项目
【CateGory Index】: TN383.1
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