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Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 10, Iss. 7 — Jul. 1, 2014
  • pp: 548–552

Inverted Hybrid Inorganic–Organic Light-Emitting Diodes With Balanced Charge Injection

X. A. Cao, R. Acharya, and X. M. Li

Journal of Display Technology, Vol. 10, Issue 7, pp. 548-552 (2014)


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Abstract

Green phosphorescent inverted hybrid inorganic-organic light-emitting diodes (IHyLEDs) based on a simplified organic layer/ ${{WO}}_{3}$ structure have been demonstrated. The ${{WO}}_{3}$ layer enabled facile hole injection and transport, which was balanced by efficient electron injection from the indium-tin-oxide (ITO) cathode overcoated with nanometer-thick Ca. The IHyLEDs had a turn-on voltage of 6 V. At 20 ${{mA}}/{{cm}}^{2}$ , it reached a luminance of 8133 ${{cd}}/{{m}} ^{2}$ and a current efficiency of 40 cd/A, which were 43% higher than a similar IHyLED with a conventional Al/LiF electron injection layer. The IHyLEDs with Ca also exhibited improved reliability under constant-current stressing at 20 ${{mA}}/{{cm}}^{2}$ .

© 2014 IEEE

Citation
X. A. Cao, R. Acharya, and X. M. Li, "Inverted Hybrid Inorganic–Organic Light-Emitting Diodes With Balanced Charge Injection," J. Display Technol. 10, 548-552 (2014)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-10-7-548

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