Optical Properties of Oligo(9,9-diarylfluorene) Derivatives in Thin Films and Their Application for Organic Light-Emitting Field-Effect Transistors
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- 作者：Takahito Oyamada ; Chih-Hao Chang ; Teng-Chih Chao ; Fu-Chuan Fang ; Chung-Chih Wu ; Ken-Tsung Wong ; Hiroyuki Sasabe ; Chihaya Adachi
- 刊名：Journal of Physical Chemistry C
- 出版年：2007
- 出版时间：January 11, 2007
- 年：2007
- 卷：111
- 期：1
- 页码：108 - 115
- 全文大小：998K
- 年卷期：v.111,no.1(January 11, 2007)
- ISSN：1932-7455
文摘
We demonstrated that oligo(9,9-diarylfluorene) derivatives have high potential for optoelectronic applicationssuch as organic lasers and light-emitting organic field-effect transistors (LE-OFETs). The oligo(9,9-diarylfluorene) derivatives have high photoluminescence quantum efficiencies up to 
PL 
70-75% andvery low amplified spontaneous emission thresholds (Eth) down to 0.5 
J/cm2 in their vacuum-deposited neatfilms. In particular, the trimer derivatives (B3 and T3) show higher PL and lower Eth than those of thedimers (B2 and T2). Efficient deep-blue LE-OFETs with the electroluminescence (EL) peaking at 
peak =429 nm were demonstrated using the ter(9,9-diarylfluorene) as the active layer. Rather high luminance up toL 150 cd/m2 and EL quantum efficiency up to 
ext 0.60% were achieved with the optimum source-drainchannel length, indicating bipolar carrier injection in the terfluorene layer under the FET operation.
PL 70-75% andvery low amplified spontaneous emission thresholds (Eth) down to 0.5 J/cm2 in their vacuum-deposited neatfilms. In particular, the trimer derivatives (B3 and T3) show higher PL and lower Eth than those of thedimers (B2 and T2). Efficient deep-blue LE-OFETs with the electroluminescence (EL) peaking at peak =429 nm were demonstrated using the ter(9,9-diarylfluorene) as the active layer. Rather high luminance up toL 150 cd/m2 and EL quantum efficiency up to ext 0.60% were achieved with the optimum source-drainchannel length, indicating bipolar carrier injection in the terfluorene layer under the FET operation.