Photopatternable Poly(4-styrene sulfonic acid)-Wrapped MWNT Thin-Film Source/Drain Electrodes for Use in Organic Field-Effect Transistors

被引:35
作者
Hong, Kipyo [1 ]
Kim, Se Hyun [1 ]
Yang, Chanwoo [1 ]
Yun, Won Min [1 ]
Nam, Sooji [1 ]
Jang, Jaeyoung [1 ]
Park, Chanjun [2 ]
Park, Chan Eon [1 ]
机构
[1] Pohang Univ Sci & Technol, Dept Chem Engn, Polymer Res Inst, Pohang 790784, South Korea
[2] Seoul Natl Univ Sci & Technol, Dept Mech Engn, Seoul 139743, South Korea
关键词
solution-processable; photopatternable; source/drain electrode; carbon nanotube; organic field-effect transistor; contact resistance; WALLED CARBON NANOTUBES; LARGE-AREA; POLYMER; PENTACENE; WATER; SOLUBILIZATION; TRANSPARENT; INTERFACES; MOBILITY; BARRIER;
D O I
10.1021/am1008826
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
We describe the cross linking of poly(4-styrene-sulfonic cid) (PSS) by exposure to ultra violet (UV) light (lambda = 255 nm) under a vacuum. Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) showed that the photo-crosslinking of PSS resulted from coupling between radicals that were generated in the polymer chains by UV excitation.The photo-cross-linkable characteristics of PSS Were employed to fabricate solution-processable, Photopatternable, and conductive PSS-wrapped multiwalled carbon nanotube (MWNT) composite thin films by wrapping MWNTs with PSS in water. During photo-cross-linking, the work function of the PSS-wrapped MWNTs decreased from 4.83 to 4.53 eV following cleavage of a significant number of sulfonic acid groups. Despite the decreased work function of the PSS wrapped MWNTs the photopatterned PSS wrapped MWNTs produced good source/drain electrodes for OFETs, yeilding a mobility (0.134 +/- 0.056 cm(2)/(V s)) for the TIPS-PEN field-effect transistors fabricated using PSS-wrapped MWNTs as source/drain electrodes that was higher the mobility of gold-based transistors (0.01,1 +/- 0.004 cm(2)/(V s))
引用
收藏
页码:74 / 79
页数:6
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