http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Direct mapping of potential distribution of Al/poly(alkylthiophene)/Au diode
Keiichi Kaneto,Masahiro Nakagawa,Wataru Takashima 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
Potential profiles of an Al/poly(3-hexylthiophene), PHT film/Au diode through Al to Au electrodes have been measured directly using a micro-manipulator with a potential probe tip. A steep potential cliff is observed at the interface of Al/PHT for negative biases to Au against Al, indicating the existence of a depletion layer with higher resistance than that of the PHT bulk region. For a positive bias above +1 V to Au, the interface resistance at Al/PHT decreases markedly, resulting in a forward current in the rectification diode. It is found that the contact resistance of PHT/Au is unexpectedly large in spite of the ohmic behavior. The effect of light on the depletion layer is also studied. It is stressed that the contact resistances of PHT and metals are significantly important and determine the performance of organic electronic devices.
Potential profiles in poly(3-hexylthiophene) field effect transistor
Daisuke Tanimura,Makoto Yano,Wataru Takashima,Keiichi Kaneto 한국물리학회 2005 Current Applied Physics Vol.5 No.2
A potential profile along the channel in a conducting polymer field effect transistor (FET) has been measured directly using micro-manipulator with potential probing tip. The FET was fabricated with a head.tail coupled poly(3-hexylthiophene) as the channel semiconductor on a SiO2/n-Si substrate. The potential profile along the channel shows almost flat potential being equal to the source until near the drain. Then the channel potential abruptly increases near the drain, which has been observed for both linear and saturation regions in the drain current.drain voltage curves. The results are discussed in terms of carrier injection at the drain electrode and pinch off characteristics.
Enhanced electrochemical strain in polypyrrole films
Takaharu Nakashima,Devendra Kumar,Wataru Takashima,Tetsuji Zama,Susumu Hara,Shingo Sewa,Keiich Kaneto 한국물리학회 2005 Current Applied Physics Vol.5 No.2
Electrochemomechanical characteristics of polypyrrole (PPy) lms, electrodeposited from tetra-n-butylammonium triuorometh-ane-sulfonate dissolved in methyl benzoate (PPyFMS), have been investigated using a simultaneous measurement of electrochem-omechanical deformation (ECMD) with cyclic voltammetry (CV) by comparing with PPy lms deposited fromp-phenol sulfonate inaqueous media (PPyPPS). The ECMD magnitude of PPyFMS lm was reached around 9% at 1st cycle and was decreased to beabout 3.2% at 20th cycle with electrochemical cycling in 1 M NaPF6. While in 1 M NaCl solution, the ECMD magnitude was1.9% at 20th cycle in CV measurement. In the case for the PPyPPS lm, ECMD magnitude at 20th cycle was around 0.8% and1.1% in 1 M NaPF 6 and 1 M NaCl solutions, respectively. The results indicate that the combination of electrolytes employed inboth the electrodeposition and the device actuation plays the very important role for achieving the enhancement of ECMD magn-itudes. In the case of ECMD behaviors, it was found that the electrolyte used in the lm actuation determines the ECMD charac-teristics..