Oral Presentation , Page 132-135 (4)

Volume Title: 2nd IEEE International Conference on Electronic Eng., Faculty of Electronic Eng., Menouf, Egypt, 3-4 July. 2021

Shaimaa Gamal; Ihab Talkhan

Cairo University

Abstract— In this paper, RGB organic light-emitting diodes are developed using a multiple quantum well (MQW) structure to improve the average percentage between the far-field power and the dipole source power which is known as the Extraction Efficiency (EE), and the full-width half-maximum (FWHM). Then the proposed structure is compared with a conventional OLED structure. Red ph-OLED QW, in which 4-(dicyanomethylene)-2-(t-butyl)-6-methyl-4H-pyran(DCJTB) doped (8-hydroxyquinoline) aluminum (Alq3) as emitting layer (EML) and N, N′-Di(1-naphthyl)-N, N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) is used as a hole transport layer (HTL) and interlayer [DCJTB doped Alq3/NPB/ DCJTB doped Alq3]n, Green ph-OLED, in which the 4,4′-bis(Ncarbazolyl)-1,1′-biphenyl (CBP) and tris[2-phenylpyridinatoC2, N]iridium(III) [Ir(ppy)3] are used as the emission layer and N, N′-Di(1-naphthyl)-N, N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) are used as a hole transport layer (HTL) and interlayer [CBP: Ir(ppy)3/ TCTA/ CBP: Ir(ppy)3]n and Blue ph-OLED (8-hydroxyquinoline) aluminum (Alq3) and N, N0-diphenyl-N, N0-bis(3-methylphenyl)-1,10-biphenyl-4,40-diamine) (TPD) are used as a hole transport layer (HTL) and interlayer [Alq3/TPD/Alq3]n, n is the well number, which can range from 0 to 6. MQW solved the main problem in the RGB OLEDs: the holes mobility and electrons mobility, which are not the same. Consequently, it leads to the loss and reduction of the Extraction Efficiency (EE). Then, there is a comparison between the output EE before and after applying the MQW on the RGB OLED structures, using the Lumerical Finite Difference Time Domain (FDTD) simulation.

Organic multilayer quantum well (MQW) structure; Extraction Efficiency; FDTD