Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements

Jörg Frischeisen; Daisuke Yokoyama; Chihaya Adachi; Wolfgang Brütting

doi:10.1063/1.3309705

Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements

Jörg Frischeisen, Daisuke Yokoyama, Chihaya Adachi, Wolfgang Brütting

Applied Chemistry

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

194 Citations (Scopus)

Abstract

The orientation of the transition dipole moments of fluorescent organic molecules doped into a matrix material is determined by photoluminescence measurements of the angular dependent emission spectra and by comparison with simulations. The analysis of two small molecular materials doped into a 4, 4′ -bis(N-carbazole)-biphenyl matrix is demonstrated, yielding a horizontal orientation of 91% for 4, 4′ -bis[4-(diphenylamino)styryl] biphenyl and a completely random orientation in case of tris-(8- hydroxyquinoline)aluminum (_Alq3). This expeditious technique does not require detailed information about the optical properties of the dopant, making this method particularly suitable for characterizing newly developed materials for organic light-emitting diodes with enhanced light-outcoupling efficiency.

Original language	English
Article number	073302
Journal	Applied Physics Letters
Volume	96
Issue number	7
DOIs	https://doi.org/10.1063/1.3309705
Publication status	Published - 2010

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3309705

Cite this

@article{d0e3a62c29be42698f6fbf74601516d7,

title = "Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements",

abstract = "The orientation of the transition dipole moments of fluorescent organic molecules doped into a matrix material is determined by photoluminescence measurements of the angular dependent emission spectra and by comparison with simulations. The analysis of two small molecular materials doped into a 4, 4′ -bis(N-carbazole)-biphenyl matrix is demonstrated, yielding a horizontal orientation of 91% for 4, 4′ -bis[4-(diphenylamino)styryl] biphenyl and a completely random orientation in case of tris-(8- hydroxyquinoline)aluminum (Alq3). This expeditious technique does not require detailed information about the optical properties of the dopant, making this method particularly suitable for characterizing newly developed materials for organic light-emitting diodes with enhanced light-outcoupling efficiency.",

author = "J{\"o}rg Frischeisen and Daisuke Yokoyama and Chihaya Adachi and Wolfgang Br{\"u}tting",

note = "Funding Information: We acknowledge financial support by the Elite Network of Bavaria through the international graduate school “Materials Science of Complex Interfaces” and by the Japan Society for the Promotion of Science (JSPS).",

year = "2010",

doi = "10.1063/1.3309705",

language = "English",

volume = "96",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "7",

}

TY - JOUR

T1 - Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements

AU - Frischeisen, Jörg

AU - Yokoyama, Daisuke

AU - Adachi, Chihaya

AU - Brütting, Wolfgang

N1 - Funding Information: We acknowledge financial support by the Elite Network of Bavaria through the international graduate school “Materials Science of Complex Interfaces” and by the Japan Society for the Promotion of Science (JSPS).

PY - 2010

Y1 - 2010

N2 - The orientation of the transition dipole moments of fluorescent organic molecules doped into a matrix material is determined by photoluminescence measurements of the angular dependent emission spectra and by comparison with simulations. The analysis of two small molecular materials doped into a 4, 4′ -bis(N-carbazole)-biphenyl matrix is demonstrated, yielding a horizontal orientation of 91% for 4, 4′ -bis[4-(diphenylamino)styryl] biphenyl and a completely random orientation in case of tris-(8- hydroxyquinoline)aluminum (Alq3). This expeditious technique does not require detailed information about the optical properties of the dopant, making this method particularly suitable for characterizing newly developed materials for organic light-emitting diodes with enhanced light-outcoupling efficiency.

AB - The orientation of the transition dipole moments of fluorescent organic molecules doped into a matrix material is determined by photoluminescence measurements of the angular dependent emission spectra and by comparison with simulations. The analysis of two small molecular materials doped into a 4, 4′ -bis(N-carbazole)-biphenyl matrix is demonstrated, yielding a horizontal orientation of 91% for 4, 4′ -bis[4-(diphenylamino)styryl] biphenyl and a completely random orientation in case of tris-(8- hydroxyquinoline)aluminum (Alq3). This expeditious technique does not require detailed information about the optical properties of the dopant, making this method particularly suitable for characterizing newly developed materials for organic light-emitting diodes with enhanced light-outcoupling efficiency.

UR - http://www.scopus.com/inward/record.url?scp=77249172254&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77249172254&partnerID=8YFLogxK

U2 - 10.1063/1.3309705

DO - 10.1063/1.3309705

M3 - Article

AN - SCOPUS:77249172254

SN - 0003-6951

VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 7

M1 - 073302

ER -

Determination of molecular dipole orientation in doped fluorescent organic thin films by photoluminescence measurements

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this