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RISS 인기검색어
- 검색키워드
- 저자 : Ghassan E.Jabbour (검색결과 2 건)
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High-Mobility Pyrene-Based Semiconductor for Organic Thin-Film Transistors
Cho, Hyunduck,Lee, Sunyoung,Cho, Nam Sung,Jabbour, Ghassan E.,Kwak, Jeonghun,Hwang, Do-Hoon,Lee, Changhee American Chemical Society 2013 ACS APPLIED MATERIALS & INTERFACES Vol.5 No.9
<P>Numerous conjugated oligoacenes and polythiophenes are being heavily studied in the search for high-mobility organic semiconductors. Although many researchers have designed fused aromatic compounds as organic semiconductors for organic thin-film transistors (OTFTs), pyrene-based organic semiconductors with high mobilities and on–off current ratios have not yet been reported. Here, we introduce a new pyrene-based p-type organic semiconductor showing liquid crystal behavior. The thin film characteristics of this material are investigated by varying the substrate temperature during the deposition and the gate dielectric condition using the surface modification with a self-assembled monolayer, and systematically studied in correlation with the performances of transistor devices with this compound. OTFT fabricated under the optimum deposition conditions of this compound, namely, 1,6-bis(5′-octyl-2,2′-bithiophen-5-yl)pyrene (BOBTP) shows a high-performance transistor behavior with a field-effect mobility of 2.1 cm<SUP>2</SUP> V<SUP>–1</SUP> s<SUP>–1</SUP> and an on–off current ratio of 7.6 × 10<SUP>6</SUP> and enhanced long-term stability compared to the pentacene thin-film transistor.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2013/aamick.2013.5.issue-9/am4005368/production/images/medium/am-2013-005368_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am4005368'>ACS Electronic Supporting Info</A></P>
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Thin Metal Electrodes for Semitransparent Organic Photovoltaics
이규성,김인호,연창봉,임정욱,윤선진,Ghassan E.Jabbour 한국전자통신연구원 2013 ETRI Journal Vol.35 No.4
We demonstrate semitransparent organic photovoltaics (OPVs) based on thin metal electrodes and polymer photoactive layers consisting of poly(3-hexylthiophene) and [6,6]-phenyl C61 butyric acid methyl ester. The power conversion efficiency of a semitransparent OPV device comprising a 15-nm silver (Ag) rear electrode is 1.98% under AM 1.5-G illumination through the indium-tin-oxide side of the front anode at 100 mW/cm2 with 15.6% average transmittance of the entire cell in the visible wavelength range. As its thickness increases, a thin Ag electrode mainly influences the enhancement of the short circuit current density and fill factor. Its relatively low absorption intensity makes a Ag thin film a viable option for semitransparent electrodes compatible with organic layers.
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