The effect of GO buffer layer insertion on OLED electroluminescence

T.H.T Aziz, M.M. Salleh, M. Yahya, A.A. Umar, M.Y.A. Rahman, C.F. Dee, C.C. Yap, B.Y.M. Majlis


In this paper, we report a spin coated graphene oxide serve as electron buffer layer for OLED devices with structure of ITO/PEHF/GO/Al where PEHF is poly[9,9-di-(2-ethylhexyl)-fluorenyl-2,7-diyl] emitting polymer. It is predicted that the large band gap of graphene oxide can improve the electron injection into the polymer to balance the injected hole charges leading to higher electroluminescence. Preliminary results show insertion of GO layer reduced the turn-on voltage (Von) from 11.0 V to 8.0 V and at the same time increased the brightness from 179 cd to 380 candela. We discovered that the brightness enhancement is caused by exciplex at the GO/polymer interface.


OLED; electroluminescence; graphene oxide; exciplex

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P. Chiradeja, a. Ngaopitakkul, and C. Jettanasen, “Energy

savings analysis and harmonics reduction for the electronic

ballast of T5 fluorescent lamp in a building’s lighting system,”

Energy Build., vol. 97, pp. 107–117, 2015.

S. Fujita and A. Suzuki, Electrical conduction in graphene and

nanotubes. 2013.

N. Thejo Kalyani and S. J. Dhoble, “Organic light emitting

diodes: Energy saving lighting technology - A review,” Renew.

Sustain. Energy Rev., vol. 16, no. 5, pp. 2696–2723, 2012.

Y.-S. Tyan, “Organic light-emitting-diode lighting overview,” J.

Photonics Energy, vol. 1, no. 1, p. 011009, 2011.

S. Reineke, “Organic light-emitting diodes: Phosphorescence

meets its match,” Nat. Photonics, vol. 8, no. 4, pp. 269–270, Mar.

H. J. Bolink, H. Brine, E. Coronado, and M. Sessolo, “Hybrid

organic-inorganic light emitting diodes: effect of the metal

oxide,” J. Mater. Chem., vol. 20, no. 20, p. 4047, 2010.

S. Shi, V. Sadhu, R. Moubah, G. Schmerber, Q. Bao, and S. R. P.

Silva, “Solution-processable graphene oxide as an efficient hole

injection layer for high luminance organic light-emitting diodes,”

J. Mater. Chem. C, vol. 1, no. 9, p. 1708, 2013.

Y. Yang, X. Yang, W. Yang, S. Li, J. Xu, and Y. Jiang, “Ordered

and ultrathin reduced graphene oxide LB films as hole injection

layers for organic light-emitting diode.,” Nanoscale Res. Lett.,

vol. 9, no. 1, p. 537, 2014.

B. A. Al-asbahi, M. Hafizuddin, H. Jumali, C. C. Yap, and M. M.

Salleh, “Influence of TiO 2 Nanoparticles on Enhancement of

Optoelectronic Properties of PFO-Based Light Emitting Diode,”

vol. 2013, 2013.

W. E. B. Shepherd, A. D. Platt, M. J. Kendrick, M. A. Loth, J. E.

Anthony, and O. Ostroverkhova, “Energy transfer and exciplex

formation and their impact on exciton and charge carrier

dynamics in organic films,” J. Phys. Chem. Lett., vol. 2, no. 5,

pp. 362–366, 2011.

X. K. Liu, Z. Chen, C. J. Zheng, C. L. Liu, C. S. Lee, F. Li, X. M.

Ou, and X. H. Zhang, “Prediction and design of efficient exciplex

emitters for high-efficiency, thermally activated delayedfluorescence

organic light-emitting diodes,” Adv. Mater., vol. 27,

no. 14, pp. 2378–2383, 2015.


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