eprintid: 2637
rev_number: 8
eprint_status: archive
userid: 284
dir: disk0/00/00/26/37
datestamp: 2017-11-16 02:41:03
lastmod: 2017-11-16 02:41:03
status_changed: 2017-11-16 02:41:03
type: article
metadata_visibility: show
creators_name: Nguyen, Kien Cuong
creators_id: cuongnk@vnu.edu.vn
corp_creators: Nguyen Quoc Khanh
title: Photoluminescence and I -V Characteristics of
Blended Conjugated Polymers/ZnO Nanoparticles
ispublished: pub
subjects: Phys
divisions: fac_physic
abstract: Abstract: The investigation of photoluminescence and current-voltage (I-V) characteristics of the
MEH-PPV/PVK blended polymers doped with ZnO nanoparticles (ZnO NPs). First, PVK polymers were mixed with MEH-PPV in respect to the mass-ratio of 100:15, respectively. And
then the MEH-PPV/PVK composites were doped with ZnO NPs with the mass-ratio of 10 wt%, 15 wt% and 20 wt% of total weight blended polymers. Polymer light-emitting diodes (PLEDs), based on a hybrid composite, having structure of ITO/ MEH-PPV/PVK/ZnO/Al were made by spincoated,and subsequently vacuum-thermally evaporated.
UV-Vis absorption, photoluminescence properties, SEM micrographs of the hybrid compositelayer as well as I -V characteristics of the PLED based on the MEH-PPV/ZnO-and PVK/ZnOheterojunction were investigated. Results obtained show that the turn-on voltage of the polymers/ZnO-based PLED is lower than that of the polymers-based PLED without doped ZnO NPs. This is due to the Auger-assisted energy up-conversion process occurring at the polymers/ZnO-heterojunction that could enhance the luminescence efficiency of the PLED.

Keywords: PLED, photoluminescence efficiency, MEH-PPV, PVK, SEM, spin coating, thermal
vacuum evaporation
date: 2016
date_type: published
publisher: VNU
contact_email: cuongnk@vnu.edu.vn
full_text_status: public
publication: Journal of Science: Mathematics-Physics
volume: 32
number: 1
pagerange: 52-60
refereed: TRUE
issn: 0866-8612
referencetext: References
[1] J.H. Burroughes, D.C. Bradley, A.R. Brown, R. N. Marks, K. Mackay, R. H. Friend, P.L. Burns, A.B. Holmes,
Light-emitting diodes based on conjugated polymers, Nature 347 (1990) 539.
[2] S.Y. Quan, F. Teng, Z. Xu, D.D. Wang, S.Y. Yang, Y.B. Hou, Y.S. Wang, Effect of inorganic nanolayers on
electron injection in polymer light-emitting diodes, Phys. Lett. A 352 (2006) 434.
[3] M.G. Mason, C.W. Tang, L. S. Hung, P. Raychaudhuri, J. Madathil, D.J. Giesen, L.Yan, Q.T. Le, Y. Gao, S. Y.
Lee, L.S. Liao, L.F. Cheng, W.R. Salaneck, D.A. Santos, J. L. Bredas, Interfacial chemistry of Alq3 and LiF with
reactive metals, J. Appl. Phys. 89 (2001) 2756.
[4] X.Y. Deng, S.W. Tong, L.S. Hung, Y.Q. Mo, Y. Cao, Role of ultrathin Alq3 and LiF layers in conjugated
polymer light-emitting diodes, Appl. Phys. Lett. 82 (2003) 3104.
[5] Y.Q. Peng, F.P. Lu, Injection of holes at indium tin oxide/dendrimer interface: An explanation with new theory
of thermionic emission at metal/organic interfaces, Appl. Surf. Sci. 252 (2006) 6275.
[6] F.S. Li, Z.J. Chen, W. Wei, Q.H. Gong, Blue polymer light-emitting diodes with organic/ inorganic hybrid
composite as hole transporting layer, Org. Electron. 6 (2005) 237.
[7] R. Könenkamp, R.C. Word, M. Codinez, Ultraviolet electroluminescence from ZnO/polymer heterojunction
light-emitting diodes, Nano Lett. 5 (2005) 2005.
[8] H. Sun, Q. F. Zhang, J. L. Wu, Electroluminescence from ZnO nanorods with an n-ZnO/p-Si heterojunction
structure, Nanotechnoly 17 (2006) 2271.
[9] J.P. Liu, S.C. Qu, X.B. Zeng, Y. Xu, X. F. Gou, Z.J. Wang, H.Y. Zhou, Z.G. Wang, Fabrication of ZnO and its
enhancement of charge injection and transport in hybrid organic/inorganic light emitting devices, Appl. Surf. Sci.
253 (2007) 7506.
[10] A. K. Pandey and J. M. Nunzi, Up-conversion injection in rubrene/perylene-diimide-hetero-structure
electroluminescent diodes, Applied Physics Letters 90 (2007) 263508.
funders: Vietnam National University (VNU), Hanoi
projects: QG.10.42 project
citation:   Nguyen, Kien Cuong  (2016) Photoluminescence and I -V Characteristics of Blended Conjugated Polymers/ZnO Nanoparticles.  Journal of Science: Mathematics-Physics, 32  (1).   pp. 52-60.  ISSN 0866-8612     
document_url: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/2637/1/VNU%20Journal%202016_NKCuong.pdf