Xiong Sha, Huang Shihua, Tang Aiwei, Teng Feng
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
J Nanosci Nanotechnol. 2008 Mar;8(3):1341-5.
Electroluminescence was obtained from an indium-tin-oxide/poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV): ZnSe/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/ 8-tris-hydroxyquinoline (Alq3)/LiF/Al structured device, in which ZnSe nanocrystals were synthesized in aqueous solution by using mercapto-acetate acid as stabilizer. The mechanical, electrical, and optical properties of the device were established. The photoluminescence and electroluminescence spectra changed with the mass ratio of ZnSe to MEH-PPV in the composite. Comparison between the absorption spectra and photoluminescence spectra of the ZnSe nanocrystals and the MEH-PPV thin film exhibited an effective energy transfer from ZnSe nanocrystals to MEH-PPV, which was one reason for the difference between the photoluminescence and electroluminescence spectra of the MEH-PPV: ZnSe composite film. The recombination mechanism of ZnSe nanocrystals under photo excitation and electric injection was investigated with the help of a single layer device structure of indium-tin-oxide/ZnSe/LiF/Al.
从一种氧化铟锡/聚2-甲氧基-5-(2'-乙基己氧基)-1,4-亚苯基乙烯撑:ZnSe/2,9-二甲基-4,7-二苯基-1,10-菲咯啉(BCP)/8-三羟基喹啉铝(Alq3)/LiF/Al结构的器件中获得了电致发光，其中ZnSe纳米晶体是在水溶液中以巯基乙酸为稳定剂合成的。确定了该器件的机械、电学和光学性质。该复合材料的光致发光和电致发光光谱随ZnSe与MEH-PPV的质量比而变化。ZnSe纳米晶体与MEH-PPV薄膜的吸收光谱和光致发光光谱的比较表明，存在从ZnSe纳米晶体到MEH-PPV的有效能量转移，这是MEH-PPV:ZnSe复合薄膜的光致发光光谱和电致发光光谱存在差异的一个原因。借助氧化铟锡/ZnSe/LiF/Al的单层器件结构，研究了光激发和电注入下ZnSe纳米晶体的复合机制。
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