What question did this study set out to answer?

The aim is to design and synthesize an efficient fluorescent emitter for organic light-emitting diodes (OLEDs).

March 1, 2026

“Molecular Design of a Pure-Red Fluorescent Emitter Enabling Highly Efficient Organic Light-Emitting Diodes with 4.7% EQE”

Key Points

The aim is to design and synthesize an efficient fluorescent emitter for organic light-emitting diodes (OLEDs).
Synthesis of a fluorescent emitter named tDPA-PyrQx.
Fabrication of OLED device using vacuum deposition method.
Characterization of photophysical properties supported by DFT calculations.
Maximum external quantum efficiency (EQE) of 4.7% achieved.
Exhibits pure red emission and strong absorption properties.
Demonstrates pronounced aggregation-induced emission (AIE).

Abstract

Affordable organic compounds with light-emitting properties offer a unique platform for addressing key challenges in organic electronics. This study primarily focuses on the molecular design and synthesis of a fluorescent emitter, 4-(tert-butyl)-N-(4-(tert-butyl)phenyl)-N-(4-(3,7,8-triphenylpyrazino2,3-gquinoxalin-2-yl)phenyl)aniline (tDPA-PyrQx), featuring an electron-donating bis(4-(tert-butyl)phenyl)amine group on a pyrazino2,3-gquinoxaline acceptor. The emitter exhibits high thermal stability, strong absorption and emission, and pronounced aggregation-induced emission (AIE), with its photophysical characteristics well supported by DFT calculations. The tDPA-PyrQx-doped OLED device was fabricated by using vacuum deposition and exhibited pure red emission, delivering a maximum external quantum efficiency (EQE) of 4.7% and Commission Internationale de l’Eclairage (CIE) coordinates of (0.67, 0.37).

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Cite This Study

Madagyal et al. (Fri,) studied this question.

synapsesocial.com/papers/69a3d867ec16d51705d2f2c4 https://doi.org/https://doi.org/10.1021/acsaom.5c00552

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