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Related Experiment Video

Updated: May 26, 2026

Development of Efficient OLEDs from Solution Deposition
07:09

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

A Rigid and Strong Donor Strategy for Solution-Processed Neat-Film Near-Infrared OLEDs Beyond 900 nm.

Shuo Li1, Zhaomeng Sun2, Wansheng Liu2

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China.

Angewandte Chemie (International Ed. in English)
|May 25, 2026
PubMed
Summary

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Short-Wavelength Infrared Organic Light-Emitting Diodes from Solution-Processable Aggregation-Induced Emission Molecules.

ACS applied materials & interfaces·2026
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Beyond 800 nm: recent progress in high-performance near-infrared thermally activated delayed fluorescence based OLEDs.

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Achieving high efficiency ultrapure violet OLEDs with a CIE <sub><i>y</i></sub> coordinate of below 0.015 through precise manipulation of peripheral heavy atom sulfur.

Chemical science·2025

Researchers developed new near-infrared (NIR) organic light-emitting diodes (OLEDs) using novel donors. These devices achieve efficient long-wavelength emission, overcoming limitations of traditional triphenylamine-based emitters.

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photophysics

Background:

  • Near-infrared (NIR) organic light-emitting diodes (OLEDs) often exhibit low external quantum efficiencies (EQEs).
  • Conventional NIR thermally activated delayed fluorescence (TADF) emitters are limited by triphenylamine (TPA)-based donor structures, hindering molecular design flexibility.

Purpose of the Study:

  • To develop novel NIR-TADF emitters with improved performance.
  • To explore new donor units independent of TPA systems.
  • To fine-tune charge-transfer characteristics through acceptor framework modification.

Main Methods:

  • Synthesis of four new NIR-TADF emitters featuring a rigid, electron-donating donor unit.
  • Modification of cyano group positions on the acceptor framework to tune charge-transfer properties.
Keywords:
TADF emissionindolophenazine donornear‐IR OLEDsquinoxaline acceptor

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Last Updated: May 26, 2026

Development of Efficient OLEDs from Solution Deposition
07:09

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter
06:25

Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter

Published on: November 7, 2025

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
07:44

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

  • Fabrication and characterization of solution-processed neat-film OLED devices.

    • Main Results:

    • Electroluminescence was observed in the range of 867 to 922 nm.
    • A device utilizing the tBPz-CN36 emitter achieved an EQE of 0.01% at 922 nm.
    • This EQE represents a significant advancement for neat-film NIR TADF OLEDs in this wavelength region.

    Conclusions:

    • A rigid donor unit, independent of TPA, is effective for NIR TADF emitter design.
    • Acceptor-site engineering via cyano group positioning offers a viable strategy for long-wavelength NIR emission.
    • This approach enables NIR TADF emission beyond conventional TPA-based architectures.