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Origin and Characteristics of Blue Light Emission in Solid State Cathodoluminescence of MEH-PPV |
| QU Chong1,2;XU Zheng1,3;TENG Feng1;QIAN Lei1;YU Wen-Ge1;QUAN Shan-Yu1;XU Xu-Rong1,2 |
| 1Institute of Optoelectronic Technology, Key Laboratory for Information Storage, Displays and Materials, Beijing Jiaotong University, Beijing 100044
2Department of Physics, Linyi Teachers’ College, Linyi 276005
3Postdoctoral Working Station of Zhong-huan San-Jin Ltd.,Tianjin Economy and Technological Development Area, Tianjin 300457
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| Cite this article: |
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QU Chong, XU Zheng, TENG Feng et al 2004 Chin. Phys. Lett. 21 552-555 |
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Abstract Based on our previous study [Chin. Phys. Lett. 20 (2003) 1144] on the solid state cathodoluminescence from organic luminescent materials, here we study the origin and characteristics of blue light emission in solid state cathodoluminescence of Poly [(2-methoxy-5-(2'-ethyl-hexyloxy)phenylene vinyene] (MEH-PPV) and the dependence of each spectral peak on electric field strength. The results demonstrate that the blue spectral shift benefits from field ionization of excitons, and three regions of electric field are found, in which there are pure exciton emission, coexistence of exciton emission and radiative recombination, and pure radiative recombination.
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| Keywords:
60.Fi
78.60.Hk
73.50.-h
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Published: 01 March 2004
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| PACS: |
78
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(Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter )
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60.Fi
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78.60.Hk
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(Cathodoluminescence, ionoluminescence)
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73.50.-h
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(Electronic transport phenomena in thin films)
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