Characteristics performance and analysis of positional variation in charge generation layer to enhance performance of OLED.

Abstract

Abstract In this paper, a highly efficient charge generation layer (CGL) based blue organic light emitting diode (OLED) is proposed. The proposed device contains a CGL which comprises of two materials 1,1-bis[(di-4-tolyamino)phenyl)]cyclohexane (TAPC) and 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) which act as hole and electron injectors, correspondingly. The CGL in the proposed device is placed outside of the emissive layer which provides better luminescence and current as compared with four other CGL based devices D2, D3, D4 and D5 where CGL is utilized below cathode, above anode, near both electrodes (cathode and anode) and inside the emissive layer, respectively. The proposed device exhibits noteworthy results as peak values of current and luminescence are achieved as 0.44 A and 3636.3 cd/m2, correspondingly. The obtained luminescence is about 16.8, 2.3, 1.7, 3, 1.6 times improved on comparing with D1, D2, D3, D4 and D5. Furthermore, thickness optimization of the proposed device is also outlined. The optimized device showed the maximum luminescence of 4670 cd/m2.