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White Electroluminescent Devices Using Polymer Blends

Published online by Cambridge University Press:  15 February 2011

Do-Hoon Hwang ,
Jeong-Ik Lee  and
Chang-Hee Lee
Do-Hoon Hwang
Affiliation:
Department of Applied Chemistry, Kumoh National Institute of Technology, Kumi 730-701, Korea(dhhwang@kumoh.ac.kr)
Jeong-Ik Lee
Affiliation:
Basic Research Lab., ETRI, Taejon 305-350, Korea 3Department of Physics, Inha University, Incheon 402-751, Korea
Chang-Hee Lee
Affiliation:
Basic Research Lab., ETRI, Taejon 305-350, Korea 3Department of Physics, Inha University, Incheon 402-751, Korea
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Abstract

White light-emitting devices were fabricated using the blends of blue, green, red emissive polymers of poly[9,9-(2'-ethylhexyl)fluorene] (PEHF), poly(9,9-dioctylfluorene-2,7-vinylene) (POFV), poly(2-(3',7'-dimethyloctyloxy)-5-methoxy-1,4-phenylene-1-cyanovinylene) (CNPPV) and poly(2-(2'-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene) (MEH-PPV). Inefficient energy transfers between the blue polymer and the green or the red polymer, which was observed in PL spectra of the blend films, provides a good opportunity to get white light emission due to better blend ratio controllability. The EL devices were fabricated with ITO/PEDOT/blend/Ca/Al configuration and good white light-emission was obtained for a certain blend ratio. The light-emission was observable from 4V and a maximum brightness of 400 cd/m2 was obtained with the device.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 771: Symposium L – Organic and Polymeric Materials and Devices , 2003 , L4.28
Copyright
Copyright © Materials Research Society 2003

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References

1. Shi, J., Tang, C.W., US patent 5683823 (1997).Google Scholar
2. Deshpande, R.S., Bulovic, V., Forrest, S.R., Appl. Phys. Lett. 75, 888 (1999).Google Scholar
3. Kido, J., Kimura, M., Nagai, K., Science 267, 1332 (1995).Google Scholar
4. Kido, J., Shionya, H., Nagai, K., Appl. Phys. Lett. 67, 2281 (1995).Google Scholar
5. Lee, J.I., Chu, H.Y., Kim, S.H., Do, L.M., Zyung, T., Hwang, D.H., Optical Materials 21, 205 (2002).Google Scholar
6. Grell, M., Knoll, W., Lupo, D., Miesel, A., Mieteva, T., Neher, D., Nothofer, H.G., Scherf, U., Yasuda, A., Adv. Mater. 11, 671 (1999).Google Scholar
7 Jin, S.H., Park, H.J., Kim, J.Y., Lee, K., Lee, S., Moon, S.D.K., Lee, H.J., Gal, Y.S., Macromolecules 35, 7532 (2002).Google Scholar
8. Greenham, N.C., Moratti, S.C., Bradley, D.D.C., Friend, R.H., Holmes, A.B., Nature 365, 628 (1993).Google Scholar
9. Ahn, T., Jang, M.S., Shim, H.K., Hwang, D.H., Zyung, T., Macromolecules 32, 3279 (1999).Google Scholar