Confinement of Long-Lived Triplet Excitons in Organic Semiconducting Host–Guest Systems

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Long-lived triplet excitons on organic molecules easily deactivate at room temperature because of the presence of thermally activated nonradiative pathways. This study demonstrates long-lived phosphorescence at room temperature resulting from suppression of the nonradiative deactivation of triplet excitons in conventional organic semiconducting host–guest systems. The nonradiative deactivation pathway strongly depends on the triplet energy gap between the guest emitting molecules and the host matrices. The triplet energy gap required to confine the long-lived triplet excitons (≈0.5 eV) is much larger than that of conventional host–guest systems for phosphorescent emitters. By effectively confining the triplet excitons, this study demonstrates long-lived room-temperature phosphorescence under optical and electrical excitation.

Original languageEnglish
Article number1703902
JournalAdvanced Functional Materials
Volume27
Issue number40
DOIs
Publication statusPublished - Oct 26 2017

Fingerprint

Excitons
excitons
Phosphorescence
phosphorescence
deactivation
Energy gap
room temperature
Molecules
confining
Temperature
molecules
emitters
retarding
LDS 751
matrices
excitation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Confinement of Long-Lived Triplet Excitons in Organic Semiconducting Host–Guest Systems. / Notsuka, Naoto; Kabe, Ryota; Goshi, Kenichi; Adachi, Chihaya.

In: Advanced Functional Materials, Vol. 27, No. 40, 1703902, 26.10.2017.

Research output: Contribution to journalArticle

@article{dbfd2ca5c56644a58c4811264796cdf8,
title = "Confinement of Long-Lived Triplet Excitons in Organic Semiconducting Host–Guest Systems",
abstract = "Long-lived triplet excitons on organic molecules easily deactivate at room temperature because of the presence of thermally activated nonradiative pathways. This study demonstrates long-lived phosphorescence at room temperature resulting from suppression of the nonradiative deactivation of triplet excitons in conventional organic semiconducting host–guest systems. The nonradiative deactivation pathway strongly depends on the triplet energy gap between the guest emitting molecules and the host matrices. The triplet energy gap required to confine the long-lived triplet excitons (≈0.5 eV) is much larger than that of conventional host–guest systems for phosphorescent emitters. By effectively confining the triplet excitons, this study demonstrates long-lived room-temperature phosphorescence under optical and electrical excitation.",
author = "Naoto Notsuka and Ryota Kabe and Kenichi Goshi and Chihaya Adachi",
year = "2017",
month = "10",
day = "26",
doi = "10.1002/adfm.201703902",
language = "English",
volume = "27",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "40",

}

TY - JOUR

T1 - Confinement of Long-Lived Triplet Excitons in Organic Semiconducting Host–Guest Systems

AU - Notsuka, Naoto

AU - Kabe, Ryota

AU - Goshi, Kenichi

AU - Adachi, Chihaya

PY - 2017/10/26

Y1 - 2017/10/26

N2 - Long-lived triplet excitons on organic molecules easily deactivate at room temperature because of the presence of thermally activated nonradiative pathways. This study demonstrates long-lived phosphorescence at room temperature resulting from suppression of the nonradiative deactivation of triplet excitons in conventional organic semiconducting host–guest systems. The nonradiative deactivation pathway strongly depends on the triplet energy gap between the guest emitting molecules and the host matrices. The triplet energy gap required to confine the long-lived triplet excitons (≈0.5 eV) is much larger than that of conventional host–guest systems for phosphorescent emitters. By effectively confining the triplet excitons, this study demonstrates long-lived room-temperature phosphorescence under optical and electrical excitation.

AB - Long-lived triplet excitons on organic molecules easily deactivate at room temperature because of the presence of thermally activated nonradiative pathways. This study demonstrates long-lived phosphorescence at room temperature resulting from suppression of the nonradiative deactivation of triplet excitons in conventional organic semiconducting host–guest systems. The nonradiative deactivation pathway strongly depends on the triplet energy gap between the guest emitting molecules and the host matrices. The triplet energy gap required to confine the long-lived triplet excitons (≈0.5 eV) is much larger than that of conventional host–guest systems for phosphorescent emitters. By effectively confining the triplet excitons, this study demonstrates long-lived room-temperature phosphorescence under optical and electrical excitation.

UR - http://www.scopus.com/inward/record.url?scp=85030148731&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85030148731&partnerID=8YFLogxK

U2 - 10.1002/adfm.201703902

DO - 10.1002/adfm.201703902

M3 - Article

VL - 27

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 40

M1 - 1703902

ER -