Enhanced the performances of blue organic light emitting diode (OLED) based on 4,4’-bis(2,2’diphenylvinyl)-1,1’-biphenyl (DPVBi).

 

Mohd Khairy Othman and Muhamad Mat Salleh

 

Institute of Microengineering and Nanoelectronics (IMEN),

Universiti Kebangsaan Malaysia,

43600 Bangi Selangor.

 

E-mail : mohd_khairy@yahoo.com

 

 

ABSTRACTS

 

Enhanced blue organic light emitting diode (OLED) has been observed from vacuum deposited of 4,4’-bis(2,2’diphenilvinyl)-1,1’-biphenyl (DPVBi) emitting material. The two-layer device structure consists of indium tine oxide (ITO)/PVK/DPVBi/Al has been studied. Here the indium tine oxide (ITO) used as anode, poly-9-vinylcarbozole (PVK) as hole transporting layer, 4,4’-bis(2,2’diphenilvinyl)-1,1’-biphenyl (DPVBi) as the blue emitting layer and Aluminum (Al) as the cathode. Optical properties of DPVBi thin film prepared from thermal evaporation technique were characterized using UV-VIS spectrophotometer. The performances of device were analyzed through current-voltage (IV) curve and the electroluminescent (EL) spectrum.  The two-layer OLED device of ITO/PVK (98 nm)/DPVBi (56 nm)/Al (150nm) shows enhancement of blue light emission and better diodes behavior. The device shows blue emission at peak of 483 nm and the turn-on voltage are at 8.0 V.

 

 

REFFERENCES

 

[1]            Tang, C. W., VanSlyke, S. A. 1987. Organic electroluminescent diodes.  J. Appl. Phys.  51(12): 913-915.

[2]            Jiang, X.Y., Zhang, Z.L., Zheng, X.Y., Wu, Y.Z., Xu, S.H. 2001. Thin Solid Films. 401: 251-254

[3]            Zhang, X.H., Wu, S.K., Gao, Z.Q., Lee, C.S., Lee, S.T., Kwong, H.L. 2000. 371: 40-46

[4]            Hosokawa, C., Higashi, H., Nakamura, H., Kusumoto, T. 1995. Appl. Phys. Lett. 67 (26): 3853-3855

[5]            Troadec, D., Veriot, G., Moliton, A. 2002. Synthetic. Metals. 127: 165-168

[6]            Kajii, H., Tsukagawa, T., Okuno, H., Taneda, T., Yoshino, K., Ohmori, Y. 2001. Thin Solid Films. 393: 388-392

[7]            Lu, A., Jiang, Q., Zhu, W., Xie, M., Huo, Y., Chen, X., Wang, Z., Zou, D., Tsutsui, T. 2000. Synthetic. Metals. 111-112: 425-

[8]            Parker, I.D., Pei, Q., Marrocco, M. 1994. Appl. Phys. Lett. 65 (10): 1272-1274

[9]            Xie, W., Hou, J., Liu, S. 2003. Semicond. Sci. Technol. 18: L42-L44.

[10]         Haskal, E.I. 1997. Synthetic. Metals. 91: 187-190  

[11]         Chung, D.H., Kim, S.K., Lee, J.Y., Hong, J.W., Cho, H.N., Kim, Y.S., Kim, T.W. 2003. J. of Information Display. 4(1): 29-44