Abstract
Horizontal orientation of light-emitting chromophores plays a critical role in the light outcoupling efficiency and the overall performances of organic light-emitting diodes. Here, we demonstrate that such a horizontal orientation of light-emitting molecules can be achieved in solution-processed blends containing highly fluorescent oligofluorenes dispersed into various small molecule host materials. The influences of the host material, the solvent used for the spin-coating, the doping concentration of the oligofluorenes and the oligofluorene chemical structure on these orientational processes are investigated using variable angle spectroscopic ellipsometry and angle-dependent photoluminescence measurements. By clarifying the roles played by these parameters in the horizontal orientation of the emitters, the results provide crucial insights into these molecular orientational processes in spin-coated glassy organic thin films, which should be relevant for the development of high-efficiency solution-processed organic light-emitting diodes in the near future.
| Original language | English |
|---|---|
| Pages (from-to) | 11557-11565 |
| Number of pages | 9 |
| Journal | Journal of Materials Chemistry C |
| Volume | 4 |
| Issue number | 48 |
| DOIs | |
| Publication status | Published - Jan 1 2016 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Chemistry
Cite this
Horizontal molecular orientation of light-emitting oligofluorenes in spin-coated glassy organic thin films. / Zhao, Li; Komino, Takeshi; Kim, Dae Hyeon; Sazzad, Muhammad Hasnan; Pitrat, Delphine; Mulatier, Jean Christophe; Andraud, Chantal; Ribierre, Jean Charles Maurice; Adachi, Chihaya.
In: Journal of Materials Chemistry C, Vol. 4, No. 48, 01.01.2016, p. 11557-11565.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Horizontal molecular orientation of light-emitting oligofluorenes in spin-coated glassy organic thin films
AU - Zhao, Li
AU - Komino, Takeshi
AU - Kim, Dae Hyeon
AU - Sazzad, Muhammad Hasnan
AU - Pitrat, Delphine
AU - Mulatier, Jean Christophe
AU - Andraud, Chantal
AU - Ribierre, Jean Charles Maurice
AU - Adachi, Chihaya
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Horizontal orientation of light-emitting chromophores plays a critical role in the light outcoupling efficiency and the overall performances of organic light-emitting diodes. Here, we demonstrate that such a horizontal orientation of light-emitting molecules can be achieved in solution-processed blends containing highly fluorescent oligofluorenes dispersed into various small molecule host materials. The influences of the host material, the solvent used for the spin-coating, the doping concentration of the oligofluorenes and the oligofluorene chemical structure on these orientational processes are investigated using variable angle spectroscopic ellipsometry and angle-dependent photoluminescence measurements. By clarifying the roles played by these parameters in the horizontal orientation of the emitters, the results provide crucial insights into these molecular orientational processes in spin-coated glassy organic thin films, which should be relevant for the development of high-efficiency solution-processed organic light-emitting diodes in the near future.
AB - Horizontal orientation of light-emitting chromophores plays a critical role in the light outcoupling efficiency and the overall performances of organic light-emitting diodes. Here, we demonstrate that such a horizontal orientation of light-emitting molecules can be achieved in solution-processed blends containing highly fluorescent oligofluorenes dispersed into various small molecule host materials. The influences of the host material, the solvent used for the spin-coating, the doping concentration of the oligofluorenes and the oligofluorene chemical structure on these orientational processes are investigated using variable angle spectroscopic ellipsometry and angle-dependent photoluminescence measurements. By clarifying the roles played by these parameters in the horizontal orientation of the emitters, the results provide crucial insights into these molecular orientational processes in spin-coated glassy organic thin films, which should be relevant for the development of high-efficiency solution-processed organic light-emitting diodes in the near future.
UR - http://www.scopus.com/inward/record.url?scp=85003029354&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85003029354&partnerID=8YFLogxK
U2 - 10.1039/c6tc02861f
DO - 10.1039/c6tc02861f
M3 - Article
AN - SCOPUS:85003029354
VL - 4
SP - 11557
EP - 11565
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
SN - 2050-7526
IS - 48
ER -