Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
권호 표지
DOI QR코드

DOI QR Code

Optical Properties of Graphene Doped ZnS:(Cu,Al) Inorganic Electroluminescence Devices by Screen Printing

Graphene을 첨가하여 스크린 프린팅으로 제작한 ZnS:Cu,Al 무기 전계발광 소자의 광특성

  • Jo, Sung Ho (Department of Graphic Arts Information Engineering, Pukyong National University) ;
  • Lee, Sang Nam (Department of Graphic Arts Information Engineering, Pukyong National University)
  • 조성호 (부경대학교 인쇄정보공학과) ;
  • 이상남 (부경대학교 인쇄정보공학과)
  • Received : 2015.05.15
  • Accepted : 2015.09.02
  • Published : 2015.10.25
Download PDF
⟨ Previous Next ⟩

Abstract

An inorganic electroluminescence device based on a green ZnS:(Cu,Al) phosphor was fabricated by a screen printing method. Graphene was added to the phosphor layer to increase the electroluminescence intensity. As the graphene concentration increased, the photoluminescence intensity decreased; on the other hand, the electroluminescence intensity increased, up to 0.6 wt%.

본 연구에서는 스크린 인쇄 방법을 이용하여 무기 전계발광 소자를 제작하였다. 발광층은 녹색 형광체인 ZnS : Cu, Al을 사용하고, 전도성 재료로 잘 알려진 graphene를 첨가하여 EL 소자의 발광 휘도 및 효율을 향상시키고자 하였다. Graphene의 농도증가에 따라 PL 휘도는 다소 감소하였으나, EL 발광 효율의 증가를 확인하였으며, 0.6 wt% 첨가에서 가장 높은 휘도를 나타냈다.

Keywords

References

  1. G. Destriau, "Experimental studies on the action of an electric field on phosphorescent sulfides," J. Chem. Phys. 33, 620-625 (1936).
  2. Y. A. Ono, Electroluminescent Displays (World Scientific, Singapore, 1995).
  3. M. J. Bae, S. H. Park, T. W. Jeong, J. H. Lee, I. T. Han, Y. W. Jin, J. M. Kim, J. Y. Kim, J. B. Yoo, and S. G. Yu, "Carbon nanotube induced enhancement of electroluminescence of phosphor," Appl. Phys. Lett. 95, 0719011-0710913 (2009).
  4. P. K. Shon, Ph. D. Thesis, Pukyong National University, Busan (2012), pp. 60-76.
  5. X. Wang, L. Zhi, and K. Mullen, "Transparent, conductive graphene electrodes for dye-sensitized solar cells," Nano Lett. 8, 323-327 (2008). https://doi.org/10.1021/nl072838r
  6. A. G. Fischer, "Electroluminescent lines in ZnS powder particles: I. Embedding media and basic observations," J. Electrochem. Soc. 109, 1043-1049 (1962). https://doi.org/10.1149/1.2425233
  7. J. Y. Kim, H. B. Kim, S. H. Park, T. W. Jeong, M. J. Bae, Y. C. Kim, I. T. Han, D. G. Jung, and S. G. Yu, "Effect of a critical percolation threshold in purified short carbon nanotube-polymer/ZnS:Cu,Cl composite on electroluminescence," Org. Electron. 13, 2959-2966 (2012). https://doi.org/10.1016/j.orgel.2012.08.021
  8. C. Pecharroman and J. S. Moya, "Experimental evidence of a giant capacitance in insulator-conductor composites at the percolation threshold," Adv. Mat. 12, 294-297 (2000). https://doi.org/10.1002/(SICI)1521-4095(200002)12:4<294::AID-ADMA294>3.0.CO;2-D