Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence

Hajime Nakanotani, Taro Furukawa, Takuya Hosokai, Takuji Hatakeyama, Chihaya Adachi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

To reduce the threshold current density and move closer toward the realization of future current-injection organic semiconductor lasers, the harvesting of triplet excitons is anticipated because 75% excitons are directly formed as triplet excited states under electrical excitation according to spin statics. However, the observation of light amplification in pure phosphorescent or thermally activated delayed fluorescence (TADF) materials has nor yet been reported even under optical excitation. Herein, light amplification was observed in the TADF emitter 9-([1,1′-biphenyl]-3-yl)-N,N,5,11-tetraphenyl-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-3-amine (DABNA-2). It is found that DABNA-2 possesses not only a large stimulated emission cross-section but also a favorable window for light amplification. These results indicate that TADF emitters can form a new category of laser dyes and are important candidates for the realization of an organic semiconductor laser.

Original languageEnglish
Article number1700051
JournalAdvanced Optical Materials
Volume5
Issue number12
DOIs
Publication statusPublished - Jun 16 2017

Fingerprint

organic lasers
Amplification
Semiconducting organic compounds
Fluorescence
organic semiconductors
Excitons
fluorescence
Molecules
Semiconductor lasers
emitters
semiconductor lasers
excitons
excitation
molecules
Threshold current density
Stimulated emission
Dye lasers
Photoexcitation
stimulated emission
threshold currents

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence. / Nakanotani, Hajime; Furukawa, Taro; Hosokai, Takuya; Hatakeyama, Takuji; Adachi, Chihaya.

In: Advanced Optical Materials, Vol. 5, No. 12, 1700051, 16.06.2017.

Research output: Contribution to journalArticle

@article{d2f37f2f36974df9ac266f6433cb0ba8,
title = "Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence",
abstract = "To reduce the threshold current density and move closer toward the realization of future current-injection organic semiconductor lasers, the harvesting of triplet excitons is anticipated because 75{\%} excitons are directly formed as triplet excited states under electrical excitation according to spin statics. However, the observation of light amplification in pure phosphorescent or thermally activated delayed fluorescence (TADF) materials has nor yet been reported even under optical excitation. Herein, light amplification was observed in the TADF emitter 9-([1,1′-biphenyl]-3-yl)-N,N,5,11-tetraphenyl-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-3-amine (DABNA-2). It is found that DABNA-2 possesses not only a large stimulated emission cross-section but also a favorable window for light amplification. These results indicate that TADF emitters can form a new category of laser dyes and are important candidates for the realization of an organic semiconductor laser.",
author = "Hajime Nakanotani and Taro Furukawa and Takuya Hosokai and Takuji Hatakeyama and Chihaya Adachi",
year = "2017",
month = "6",
day = "16",
doi = "10.1002/adom.201700051",
language = "English",
volume = "5",
journal = "Advanced Optical Materials",
issn = "2195-1071",
publisher = "John Wiley and Sons Inc.",
number = "12",

}

TY - JOUR

T1 - Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence

AU - Nakanotani, Hajime

AU - Furukawa, Taro

AU - Hosokai, Takuya

AU - Hatakeyama, Takuji

AU - Adachi, Chihaya

PY - 2017/6/16

Y1 - 2017/6/16

N2 - To reduce the threshold current density and move closer toward the realization of future current-injection organic semiconductor lasers, the harvesting of triplet excitons is anticipated because 75% excitons are directly formed as triplet excited states under electrical excitation according to spin statics. However, the observation of light amplification in pure phosphorescent or thermally activated delayed fluorescence (TADF) materials has nor yet been reported even under optical excitation. Herein, light amplification was observed in the TADF emitter 9-([1,1′-biphenyl]-3-yl)-N,N,5,11-tetraphenyl-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-3-amine (DABNA-2). It is found that DABNA-2 possesses not only a large stimulated emission cross-section but also a favorable window for light amplification. These results indicate that TADF emitters can form a new category of laser dyes and are important candidates for the realization of an organic semiconductor laser.

AB - To reduce the threshold current density and move closer toward the realization of future current-injection organic semiconductor lasers, the harvesting of triplet excitons is anticipated because 75% excitons are directly formed as triplet excited states under electrical excitation according to spin statics. However, the observation of light amplification in pure phosphorescent or thermally activated delayed fluorescence (TADF) materials has nor yet been reported even under optical excitation. Herein, light amplification was observed in the TADF emitter 9-([1,1′-biphenyl]-3-yl)-N,N,5,11-tetraphenyl-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-3-amine (DABNA-2). It is found that DABNA-2 possesses not only a large stimulated emission cross-section but also a favorable window for light amplification. These results indicate that TADF emitters can form a new category of laser dyes and are important candidates for the realization of an organic semiconductor laser.

UR - http://www.scopus.com/inward/record.url?scp=85019558379&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019558379&partnerID=8YFLogxK

U2 - 10.1002/adom.201700051

DO - 10.1002/adom.201700051

M3 - Article

AN - SCOPUS:85019558379

VL - 5

JO - Advanced Optical Materials

JF - Advanced Optical Materials

SN - 2195-1071

IS - 12

M1 - 1700051

ER -