The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

A Study on the Enhancement of Emission Efficiency of an Organic EL Devices Using the RF Plasma

RF 플라즈마를 이용한 유기 EL소자의 발광 효율에 관한 연구

  • Published : 2003.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Efficient electrodes are devised for organic luminescent device(OLED). ITO electrode is treated with $O_2$ plasma. In order to inject hole efficiently, there is proposed the shape of anode that inserted plasma polymerized films as buffer layer between anode and organic layer using thiophene monomer. In the case of device inserted the buffer layer by using the plasma polymerization after $O_2$ plasma processing for ITO transparent electrode, since it forms the stable interface and reduce the moving speed of hole, the recombination of hole and electronic are made in the emitting layer. Therefore it realized the device capability of two times in the aspect of luminous efficiency than the device which do not be inserted the buffer layer. Experiments are limited to the device that has the structure of TPD/$AIq_3$, however, the aforementioned electrodes can similarly applied to the organic luminous device and the Polymer luminous device.

Keywords

References

  1. C. W. Tang and S. A. VanSlyke, 'Organic electroluminescent diode', Appl. Phys. Lett., Vol. 51, pp. 913-915, 1987 https://doi.org/10.1063/1.98799
  2. C. W. Tang, S. A. VanSlyke and C. H. Chen 'Electroluminescene of doped organic thin films', J. Apple. Phys., Vol. 65, pp. 3610-3616, 1989 https://doi.org/10.1063/1.343409
  3. 이덕출, 김형권, '디시아노메틸렌과 스쿠아리리움 색소도핑 유기 LED의 전기 발광 기구 및 특성', 한국전기전자재료 학회, Vol. 12, No. 10, pp. 909-914, 1999
  4. 이덕출 외7, '버퍼층으로서 플라즈마 polythiophene이 유기 EL소자에 미치는 영향', 한국전기전자재료 학회, 춘계학술대회 논문집, pp. 177-180, 2002
  5. James R. Sheats, Homer Antonidis, Mark Heschen, 'Organic Electroluminesecent Devices', Science, Vol. 273, pp. 884-888, 1996 https://doi.org/10.1126/science.273.5277.884
  6. 이덕출, 임경범, 이백수, '플라즈마 표면처리에 따른 에폭시 복합재료의 표면특성', 전기전자재료학회지, Vol. 14, No. 10, pp. 821-827, 2001
  7. M. S. Silverstein, I. Visoly-Fisher, 'Plasma polymerized thiophene: molecular structure and electrical properties', Polymer, Vol. 43, pp. 11-20, 2002 https://doi.org/10.1016/S0032-3861(01)00582-1
  8. M. Ishii, T. Mori, H. Fujikawa, S. Tokito, Y. Taga, 'Improvement of organic electroluminescent device performance by in situ plasma treatment of indiumtin-oxide surface' J. Luminescence, Vol. 87-89, pp. 1165-1167, 2000 https://doi.org/10.1016/S0022-2313(99)00581-5
  9. L. S. Hung, L. R. Zheng, and M. G. Mason, 'Anode modification in organic light-emitting diodes by low-frequency plasma polymerization of $CHF_3$',Applied physics letters, Vol. 78, No. 5, pp. 673-675, 2001 https://doi.org/10.1063/1.1331639
  10. S. A. Van Slyke, C. H. Chen, and C. W. Tang, 'Organic electroluminescent devices with improved stability', Applied physics letters, Vol. 69, No. 15, 2160-2162, 1996 https://doi.org/10.1063/1.117151
  11. Yong Qiu, Yudi Gao, Liduo Wang, Degiang Zhang, 'Efficient light emitting diodes with Teflon buffer layer', Synthetic Metals, Vol. 130, pp. 235-237, 2002 https://doi.org/10.1016/S0379-6779(02)00121-2