Synthesis, structure, and optoelectronic properties of a new twistacene 1,2,3,4,6,13-hexaphenyl-7 : 8,11 : 12-bisbenzo-pentacene
We report the synthesis, optical and electrochemical properties, as well as the fabrication of light-emitting devices for a new twistacene 1,2,3,4,6,13-hexaphenyl-7 : 8,11 : 12-bisbenzo-pentacene (HBP 1). Its structure, determined by X-ra...
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| Main Authors: | , , , , , , , |
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| 其他作者: | |
| 格式: | Article |
| 語言: | English |
| 出版: |
2012
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/94262 http://hdl.handle.net/10220/8386 |
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| 機構: | Nanyang Technological University |
| 語言: | English |
| 總結: | We report the synthesis, optical and electrochemical properties, as well as the fabrication of
light-emitting devices for a new twistacene 1,2,3,4,6,13-hexaphenyl-7 : 8,11 : 12-bisbenzo-pentacene
(HBP 1). Its structure, determined by X-ray crystallography, confirmed that this material has a twisted
topology with the torsion angle as high as 23.0 ᵒ. HBP 1 showed bright green emission both in
solution and solid state. The HOMO–LUMO gap of HBP 1 calculated from the difference between the
half-wave redox potentials (E1/2
ox = +0.74 eV and E1/2
red = -1.93 eV) is 2.67 eV, which is in good
agreement with the band gap, 2.64 eV, derived from the UV-Vis absorption data. Organic light emitting
devices using HBP 1 as the emitters have been fabricated. The results revealed that twistacenes are
promising materials to enhance the efficiency of OLEDs. |
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