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Optics Letters

Optics Letters

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  • Vol. 36, Iss. 8 — Apr. 15, 2011
  • pp: 1521–1523

Ultrathin nickel oxide film as a hole buffer layer to enhance the optoelectronic performance of a polymer light-emitting diode

Yongli Wang, Qiaoli Niu, Candong Hu, Wenjie Wang, Miao He, Yong Zhang, Shuti Li, Lingzhi Zhao, Xin Wang, Jia Xu, Qiuxiang Zhu, and Sihai Chen  »View Author Affiliations


Optics Letters, Vol. 36, Issue 8, pp. 1521-1523 (2011)
http://dx.doi.org/10.1364/OL.36.001521


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Abstract

In order to promote a polymer LED (PLED), we fabricated and introduced an ultrathin nickel oxide (NiO) buffer layer ( < 10 nm ) between the indium tin oxide (ITO) anode and the poly (3, 4-ethylenedioxythiophene) hole injection layer in the PLED. The NiO buffer layer was easily formed on the ITO anode by electron-beam deposition of a nickel (Ni) metal source and an oxygen plasma treatment process. As a result, the PLED device with the NiO buffer layer on its ITO anode had the same turn-on voltage as conventional PLED devices without the NiO buffer layer, and the luminance of the PLED device with the NiO buffer layer was doubled, compared with the conventional PLED devices without the NiO buffer layer. Improvement of the optoelectronic performance of the PLED can be attributed to the increase of the current driven into the diode, resulting from the NiO buffer layer, which can enhance the hole injection and balance the injection of the two types of carriers (holes and electrons). Thus it is an excellent choice to introduce the NiO buffer layer onto the ITO anode of the PLED devices in order to enhance the optoelectronic performance of PLED devices.

© 2011 Optical Society of America

OCIS Codes
(250.3680) Optoelectronics : Light-emitting polymers
(310.1860) Thin films : Deposition and fabrication

ToC Category:
Optoelectronics

History
Original Manuscript: January 25, 2011
Manuscript Accepted: March 17, 2011
Published: April 15, 2011

Citation
Yongli Wang, Qiaoli Niu, Candong Hu, Wenjie Wang, Miao He, Yong Zhang, Shuti Li, Lingzhi Zhao, Xin Wang, Jia Xu, Qiuxiang Zhu, and Sihai Chen, "Ultrathin nickel oxide film as a hole buffer layer to enhance the optoelectronic performance of a polymer light-emitting diode," Opt. Lett. 36, 1521-1523 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-8-1521

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