摘要
In order to take advantage of organic and inorganic materials,we chose the polymer MEH-PPV as the luminous layer and ZnS as the electron transporting layer to prepare hybrid organic-inorganic light-emitting diodes(HOILEDs):ITO/MEH-PPV(~70 nm)/ZnS(20 nm)/Al by thermal evaporation and spin coating.Compared with the single-layer device ITO/MEH-PPV(~70 nm)/Al,spectral broadening and a slightly red shift are observed.Compared with the pure organic device ITO/MEH-PPV(~70 nm)/BCP(20 nm)/Al and combined with the energy level structure diagram,it is concluded that the spectral broadening and red shift are due to the exciplex luminescence at the interface between MEH-PPV and ZnS or BCP.In addition,the hybrid inorganic-organic device shows a lower turn-on voltage,but the current efficiency is lower than that of the pure organic device with the same structure.
作者
ZHANG Yan-Fei
ZHAO Su-Ling
XU Zheng
KONG Chao
张妍斐;赵谡玲;徐征;孔超(Key Laboratory of Luminescence and Optical Information(Ministry of Education),Beijing Jiaotong University,Beijing 100044;Institute of Optoelectronics Technology,Beijing Jiaotong University,Beijing 100044)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10974013 and 60978060
the Research Fund for the Doctoral Program of Higher Education of China under Grant No 20090009110027
Beijing Municipal Natural Science Foundation under Grant No 1102028
the National Natural Science Foundation of China for Distinguished Young Scholar(No 60825407)
Beijing Municipal Science and Technology Commission under Grant No Z090803044009001
the National Basic Research Program of China under Grant No 2010CB327704
the New Century Excellent Talents in University under Grant No NCET-10-0220
the Fundamental Research Funds for the Central Universities under Grant No 2012JBZ001
the Science and Technology Innovation Fund for Outstanding PhD Students of Beijing Jiaotong University(No 48034).
