Design of efficient thermally activated delayed fluorescence materials for pure blue organic light emitting diodes

Qisheng Zhang; Jie Li; Katsuyuki Shizu; Shuping Huang; Shuzo Hirata; Hiroshi Miyazaki; Chihaya Adachi

doi:10.1021/ja306538w

Design of efficient thermally activated delayed fluorescence materials for pure blue organic light emitting diodes

Qisheng Zhang, Jie Li, Katsuyuki Shizu, Shuping Huang, Shuzo Hirata, Hiroshi Miyazaki, Chihaya Adachi

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Abstract

Efficient thermally activated delayed fluorescence (TADF) has been characterized for a carbazole/sulfone derivative in both solutions and doped films. A pure blue organic light emitting diode (OLED) based on this compound demonstrates a very high external quantum efficiency (EQE) of nearly 10% at low current density. Because TADF only occurs in a bipolar system where donor and acceptor centered ³ππ* states are close to or higher than the triplet intramolecular charge transfer ( ³CT) state, control of the π-conjugation length of both donor and acceptor is considered to be as important as breaking the π-conjugation between them in blue TADF material design.

Original language	English (US)
Pages (from-to)	14706-14709
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	134
Issue number	36
DOIs	https://doi.org/10.1021/ja306538w
State	Published - Sep 12 2012
Externally published	Yes

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abstract = "Efficient thermally activated delayed fluorescence (TADF) has been characterized for a carbazole/sulfone derivative in both solutions and doped films. A pure blue organic light emitting diode (OLED) based on this compound demonstrates a very high external quantum efficiency (EQE) of nearly 10% at low current density. Because TADF only occurs in a bipolar system where donor and acceptor centered 3ππ* states are close to or higher than the triplet intramolecular charge transfer ( 3CT) state, control of the π-conjugation length of both donor and acceptor is considered to be as important as breaking the π-conjugation between them in blue TADF material design.",

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T1 - Design of efficient thermally activated delayed fluorescence materials for pure blue organic light emitting diodes

AU - Zhang, Qisheng

AU - Li, Jie

AU - Shizu, Katsuyuki

AU - Huang, Shuping

AU - Hirata, Shuzo

AU - Miyazaki, Hiroshi

AU - Adachi, Chihaya

PY - 2012/9/12

Y1 - 2012/9/12

N2 - Efficient thermally activated delayed fluorescence (TADF) has been characterized for a carbazole/sulfone derivative in both solutions and doped films. A pure blue organic light emitting diode (OLED) based on this compound demonstrates a very high external quantum efficiency (EQE) of nearly 10% at low current density. Because TADF only occurs in a bipolar system where donor and acceptor centered 3ππ* states are close to or higher than the triplet intramolecular charge transfer ( 3CT) state, control of the π-conjugation length of both donor and acceptor is considered to be as important as breaking the π-conjugation between them in blue TADF material design.

AB - Efficient thermally activated delayed fluorescence (TADF) has been characterized for a carbazole/sulfone derivative in both solutions and doped films. A pure blue organic light emitting diode (OLED) based on this compound demonstrates a very high external quantum efficiency (EQE) of nearly 10% at low current density. Because TADF only occurs in a bipolar system where donor and acceptor centered 3ππ* states are close to or higher than the triplet intramolecular charge transfer ( 3CT) state, control of the π-conjugation length of both donor and acceptor is considered to be as important as breaking the π-conjugation between them in blue TADF material design.

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Design of efficient thermally activated delayed fluorescence materials for pure blue organic light emitting diodes

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