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Highly Efficient Near‐Infrared Organic Light‐Emitting Diode Based on a Butterfly‐Shaped Donor–Acceptor Chromophore with Strong Solid‐State Fluorescence and a Large Proportion of Radiative Excitons

Yao, Liang, Zhang, Shitong, Wang, Rong, Li, Weijun, Shen, Fangzhong, Yang, Bing, Ma, Yuguang·2014·Angewandte Chemie International Edition

Abstract

The development of near‐infrared (NIR) organic light‐emitting diodes (OLEDs) is of growing interest. Donor–acceptor (D–A) chromophores have served as an important class of NIR materials for NIR OLED applications. However, the external quantum efficiencies (EQEs) of NIR OLEDs based on conventional D–A chromophores are typically below 1 %. Reported herein is a butterfly‐shaped D–A compound, PTZ‐BZP. A PTZ‐BZP film displayed strong NIR fluorescence with an emission peak at 700 nm, and the corresponding quantum efficiency reached 16 %. Remarkably, the EQE of the NIR OLED based on PTZ‐BZP was 1.54 %, and a low efficiency roll‐off was observed, as well as a high radiative exciton ratio of 48 %, which breaks through the limit of 25 % in conventional fluorescent OLEDs. Experimental and theoretical investigations were carried out to understand the excited‐state properties of PTZ‐BZP.

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Metadata

Authors
Yao, L., Zhang, S., Wang, R., Li, W., Shen, F., Yang, B., & Ma, Y.
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2014-01-22
Volume
53
Issue
8
Pages
2119-2123
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W2152047537
Cited by
698
References
0
FWCI
36.97
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Highly Efficient Near‐Infrared Organic Light‐Emitting Diode Based on a Butterfly‐Shaped Donor–Acceptor Chromophore with Strong Solid‐State Fluorescence and a Large Proportion of Radiative Excitons. https://app.cochat.ai/papers/10.1002/anie.201308486
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Yao, L., Zhang, S., Wang, R., Li, W., Shen, F., Yang, B., & Ma, Y. (2014). Highly Efficient Near‐Infrared Organic Light‐Emitting Diode Based on a Butterfly‐Shaped Donor–Acceptor Chromophore with Strong Solid‐State Fluorescence and a Large Proportion of Radiative Excitons. Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201308486

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