Work

Device characteristics of alternating-current-driven colour-tunable phosphorescent organic light-emitting diodes

Year: 2024

Type: article

Abstract: \nWe demonstrate alternating-current (AC)-driven colour-tunable organic light-emitting diodes (OLEDs) with vertically stacked green and red phosphorescent OLED units. Optically optimized thicknesses of hole and electron transporting layers were investigated through optical simulation. In addition, two types of red host materials were used for the red OLED unit, and the red OLED unit with 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl showed higher current efficiency compared to that of the red OLED unit with 2,6-Bis(3-(9H-carbazol-9-yl)phenyl)pyridine. The fabricated colour-tunable exhibited red and green colours when the duty ratio was 1% and 99%, respectively. Furthermore, the device can produce various colours that are a mixture of green and red by adjusting the AC-driving duty ratios.\n

Source: Springer Link (Chiba Institute of Technology)

DOI: 10.1051/epjconf/202430906003/pdf

Authors: Yeonsu Hwang, Hyunkoo Lee

Institution: Sookmyung Women's University

Language: English

Topic: Organic Light-Emitting Diodes Research

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: National Research Foundation, Ministry of Science and ICT, South Korea, Institute for Information and Communications Technology Promotion

Awards: G2043467389, G3660032127, G4700831490, G4876986040, G5243095601