Ternary donor-acceptor phosphine oxide hosts with peculiar high energy gap for efficient blue electroluminescence

Mingzhi Sun; Liping Zhu; Wenjing Kan; Ying Wei; Dongge Ma; Xuefeng Fan; Wei Huang; Hui Xu

doi:10.1039/c5tc02029h

Ternary donor-acceptor phosphine oxide hosts with peculiar high energy gap for efficient blue electroluminescence

Mingzhi Sun, Liping Zhu, Wenjing Kan, Ying Wei, Dongge Ma, Xuefeng Fan, Wei Huang, Hui Xu

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Ternary donor (D)-acceptor (A)-acceptor (A) molecules are commonly considered as low triplet (T₁) energy systems for specific applications. In this work, exception to this behavior was observed in a triangle-shaped D-A-A molecule PCImbPO with unusually high triplet energy of 3.0 eV. Profiting from the enhanced D-A electronic coupling, electron injecting and transporting ability of PCImbPO was dramatically improved with negligible influences on its highest occupied molecular orbital (HOMO) characteristics. Its particular T₁ configuration adjustment further gives rise to the separated frontier MO and T₁ locations, beneficial to suppress quenching effects. By utilizing PCImbPO as host in blue phosphorescent organic light-emitting diodes (PHOLEDs) and thermally activated delayed fluorescence devices, impressively high external quantum efficiency of 22% and 12% were achieved, respectively. This work established a new understanding of high-energy-gap complicated D-A systems.

Original language	English
Pages (from-to)	9469-9478
Number of pages	10
Journal	Journal of Materials Chemistry C
Volume	3
Issue number	36
DOIs	https://doi.org/10.1039/c5tc02029h
State	Published - 31 Jul 2015
Externally published	Yes

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title = "Ternary donor-acceptor phosphine oxide hosts with peculiar high energy gap for efficient blue electroluminescence",

abstract = "Ternary donor (D)-acceptor (A)-acceptor (A) molecules are commonly considered as low triplet (T1) energy systems for specific applications. In this work, exception to this behavior was observed in a triangle-shaped D-A-A molecule PCImbPO with unusually high triplet energy of 3.0 eV. Profiting from the enhanced D-A electronic coupling, electron injecting and transporting ability of PCImbPO was dramatically improved with negligible influences on its highest occupied molecular orbital (HOMO) characteristics. Its particular T1 configuration adjustment further gives rise to the separated frontier MO and T1 locations, beneficial to suppress quenching effects. By utilizing PCImbPO as host in blue phosphorescent organic light-emitting diodes (PHOLEDs) and thermally activated delayed fluorescence devices, impressively high external quantum efficiency of 22% and 12% were achieved, respectively. This work established a new understanding of high-energy-gap complicated D-A systems.",

author = "Mingzhi Sun and Liping Zhu and Wenjing Kan and Ying Wei and Dongge Ma and Xuefeng Fan and Wei Huang and Hui Xu",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2015",

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doi = "10.1039/c5tc02029h",

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T1 - Ternary donor-acceptor phosphine oxide hosts with peculiar high energy gap for efficient blue electroluminescence

AU - Sun, Mingzhi

AU - Zhu, Liping

AU - Kan, Wenjing

AU - Wei, Ying

AU - Ma, Dongge

AU - Fan, Xuefeng

AU - Huang, Wei

AU - Xu, Hui

PY - 2015/7/31

Y1 - 2015/7/31

N2 - Ternary donor (D)-acceptor (A)-acceptor (A) molecules are commonly considered as low triplet (T1) energy systems for specific applications. In this work, exception to this behavior was observed in a triangle-shaped D-A-A molecule PCImbPO with unusually high triplet energy of 3.0 eV. Profiting from the enhanced D-A electronic coupling, electron injecting and transporting ability of PCImbPO was dramatically improved with negligible influences on its highest occupied molecular orbital (HOMO) characteristics. Its particular T1 configuration adjustment further gives rise to the separated frontier MO and T1 locations, beneficial to suppress quenching effects. By utilizing PCImbPO as host in blue phosphorescent organic light-emitting diodes (PHOLEDs) and thermally activated delayed fluorescence devices, impressively high external quantum efficiency of 22% and 12% were achieved, respectively. This work established a new understanding of high-energy-gap complicated D-A systems.

AB - Ternary donor (D)-acceptor (A)-acceptor (A) molecules are commonly considered as low triplet (T1) energy systems for specific applications. In this work, exception to this behavior was observed in a triangle-shaped D-A-A molecule PCImbPO with unusually high triplet energy of 3.0 eV. Profiting from the enhanced D-A electronic coupling, electron injecting and transporting ability of PCImbPO was dramatically improved with negligible influences on its highest occupied molecular orbital (HOMO) characteristics. Its particular T1 configuration adjustment further gives rise to the separated frontier MO and T1 locations, beneficial to suppress quenching effects. By utilizing PCImbPO as host in blue phosphorescent organic light-emitting diodes (PHOLEDs) and thermally activated delayed fluorescence devices, impressively high external quantum efficiency of 22% and 12% were achieved, respectively. This work established a new understanding of high-energy-gap complicated D-A systems.

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U2 - 10.1039/c5tc02029h

DO - 10.1039/c5tc02029h

M3 - 文章

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VL - 3

SP - 9469

EP - 9478

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 36

ER -

Ternary donor-acceptor phosphine oxide hosts with peculiar high energy gap for efficient blue electroluminescence

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