Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes

Ayataka Endo; Keigo Sato; Kazuaki Yoshimura; Takahiro Kai; Atsushi Kawada; Hiroshi Miyazaki; Chihaya Adachi

doi:10.1063/1.3558906

Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes

Ayataka Endo, Keigo Sato, Kazuaki Yoshimura, Takahiro Kai, Atsushi Kawada, Hiroshi Miyazaki, Chihaya Adachi

Applied Chemistry

Research output: Contribution to journal › Article

544 Citations (Scopus)

Abstract

A material possessing a very small energy gap between its singlet and triplet excited states, Δ E_1-3, which allows efficient up-conversion of triplet excitons into a singlet state and leads to efficient thermally activated delayed fluorescence (TADF), is reported. The compound, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a] carbazole-11-yl)-1,3,5-triazine, breaks the restriction of a large energy gap, with a Δ E_1-3of just 0.11 eV, while maintaining a high fluorescent radiative decay rate (k _r ∼ 10⁷). The intense TADF provides a pathway for highly efficient electroluminescence.

Original language	English
Article number	083302
Journal	Applied Physics Letters
Volume	98
Issue number	8
DOIs	https://doi.org/10.1063/1.3558906
Publication status	Published - Feb 21 2011

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3558906

Fingerprint Dive into the research topics of 'Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes'. Together they form a unique fingerprint.

Cite this

Endo, A., Sato, K., Yoshimura, K., Kai, T., Kawada, A., Miyazaki, H., & Adachi, C. (2011). Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes. Applied Physics Letters, 98(8), [083302]. https://doi.org/10.1063/1.3558906

@article{834ce7b9feb54e37ae0d89a85ebe765f,

title = "Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes",

abstract = "A material possessing a very small energy gap between its singlet and triplet excited states, Δ E1-3, which allows efficient up-conversion of triplet excitons into a singlet state and leads to efficient thermally activated delayed fluorescence (TADF), is reported. The compound, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a] carbazole-11-yl)-1,3,5-triazine, breaks the restriction of a large energy gap, with a Δ E1-3of just 0.11 eV, while maintaining a high fluorescent radiative decay rate (k r ∼ 107). The intense TADF provides a pathway for highly efficient electroluminescence.",

author = "Ayataka Endo and Keigo Sato and Kazuaki Yoshimura and Takahiro Kai and Atsushi Kawada and Hiroshi Miyazaki and Chihaya Adachi",

year = "2011",

month = feb,

day = "21",

doi = "10.1063/1.3558906",

language = "English",

volume = "98",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "8",

}

TY - JOUR

T1 - Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes

AU - Endo, Ayataka

AU - Sato, Keigo

AU - Yoshimura, Kazuaki

AU - Kai, Takahiro

AU - Kawada, Atsushi

AU - Miyazaki, Hiroshi

AU - Adachi, Chihaya

PY - 2011/2/21

Y1 - 2011/2/21

N2 - A material possessing a very small energy gap between its singlet and triplet excited states, Δ E1-3, which allows efficient up-conversion of triplet excitons into a singlet state and leads to efficient thermally activated delayed fluorescence (TADF), is reported. The compound, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a] carbazole-11-yl)-1,3,5-triazine, breaks the restriction of a large energy gap, with a Δ E1-3of just 0.11 eV, while maintaining a high fluorescent radiative decay rate (k r ∼ 107). The intense TADF provides a pathway for highly efficient electroluminescence.

AB - A material possessing a very small energy gap between its singlet and triplet excited states, Δ E1-3, which allows efficient up-conversion of triplet excitons into a singlet state and leads to efficient thermally activated delayed fluorescence (TADF), is reported. The compound, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a] carbazole-11-yl)-1,3,5-triazine, breaks the restriction of a large energy gap, with a Δ E1-3of just 0.11 eV, while maintaining a high fluorescent radiative decay rate (k r ∼ 107). The intense TADF provides a pathway for highly efficient electroluminescence.

UR - http://www.scopus.com/inward/record.url?scp=79952079869&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79952079869&partnerID=8YFLogxK

U2 - 10.1063/1.3558906

DO - 10.1063/1.3558906

M3 - Article

AN - SCOPUS:79952079869

VL - 98

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 8

M1 - 083302

ER -