High-Efficiency Fluorescent Organic Light-Emitting Devices Using Sensitizing Hosts with a Small Singlet-Triplet Exchange Energy

Materials with small singlet–triplet splits (ΔESTs) are introduced as sensitizing hosts to excite fluorescent dopants, breaking the trade‐off between small ΔEST and high radiative decay rates. A highly efficient orange‐fluorescent organic light‐emitting diode (OLED) is prepared, showing a maximum ex...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2014-08, Vol.26 (29), p.5050-5055
Main Authors: Zhang, Dongdong, Duan, Lian, Li, Chen, Li, Yilang, Li, Haoyuan, Zhang, Deqiang, Qiu, Yong
Format: Article
Language:English
Subjects:
Decay rate
Devices
Dopants
Energy Transfer
Energy use
Exchange
Fluorescent Dyes - chemistry
fluorescent organic light-emitting devices
high efficiency
Light
Luminescent Measurements
Organic Chemicals - chemistry
Organic light emitting diodes
Semiconductors
Sensitizing
sensitizing hosts
small singlet-triplet exchange energy
thermally activated delayed fluorescence
Tradeoffs
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Summary:Materials with small singlet–triplet splits (ΔESTs) are introduced as sensitizing hosts to excite fluorescent dopants, breaking the trade‐off between small ΔEST and high radiative decay rates. A highly efficient orange‐fluorescent organic light‐emitting diode (OLED) is prepared, showing a maximum external quantum efficiency of 12.2%.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201401476