Improvement of OLED properties with anti-reflection coatings

Chunling Liu; Dongmei Wang; Lei Zhao; Wenlong Jiang; Zhengkun Qin; Chunwu Wang

doi:10.1117/12.871364

15 November 2010 Improvement of OLED properties with anti-reflection coatings

Chunling Liu, Dongmei Wang, Lei Zhao, Wenlong Jiang, Zhengkun Qin, Chunwu Wang

Proceedings Volume 7852, LED and Display Technologies; 78521F (2010) https://doi.org/10.1117/12.871364
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

An anti-reflection (AR) coating system was inserted between the anode (ITO) and the glass substrate in the red light organic electroluminescent devices (OLED) for the structure being K9/ITO/NPB (60nm)/DCJTB (0.3nm)/Alq₃ (60nm)/ LiF(0.3nm)/Al. The AR film system structure was K9/TiO₂/Al₂O₃/2-ITO, and the optical thicknesses of TiO₂and Al₂O₃ coatings were also quarter wave length. The results indicated that the maximum transmissivity of AR coating was by 95 %( 610nm); it increased by 8% compared with only using ITO as AR coating. The average luminance increased by about 30%, the average energy efficiency increased by about 60%, while reducing the threshold voltage of the devices. The processing is simple and high efficient, and can change AR coating structure according to the OLED device different emission wavelength, therefore, can be widely applied to the OLED devices.

Citation Download Citation

Chunling Liu, Dongmei Wang, Lei Zhao, Wenlong Jiang, Zhengkun Qin, and Chunwu Wang "Improvement of OLED properties with anti-reflection coatings", Proc. SPIE 7852, LED and Display Technologies, 78521F (15 November 2010); https://doi.org/10.1117/12.871364

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