Browsing by Author "Tseng, Pin-Yen"

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Air-Stable N-type Organic Microribbon Transistors Based on Perylene Diimides Derivatives
(2015)
Tseng, Pin-Yen
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Hsieh, Gen-Wen
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Wang, Cheng-Wei
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Hung, Chun-Yi
;
Tsai, Chih-Wen
We report a new type of organic microribbon via solution phase self-assembly from a conjugated small molecule N, N\'-bis[2-(4-fluoro-phenyl)-ethyl]-3,4,9,10-perylenetetradicarboximide (4F-PEPTC) for use in organic field effect transistors. Devices based on a network of 4F-PEPTC microribbons show a typical n-channel field effect behavior with average current ratio >10(3) and exhibit excellent air stability in ambient air over 30 days.
Electronic Transport and Light Response of Air-Stable n-Type Organic Chlorophenyl-Substituted Perylene Diimide Microribbons
(2017-07-01)
Tan, Chao-Yuan
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Tseng, Pin-Yen
;
Hsieh, Gen-Wen
;
光電系統研究所
;
照明與能源光電研究所
We report a new n-type single-crystalline microribbon based on a chlorophenyl-substituted perylene tetracarboxylic diimide derivative via solution-phase self-assembly. Electronic transport, environmental stability, and photoresponse properties of these microribbons are studied using field-effect transistors. Transistors based on a network of the as-prepared microribbons have moderate electron mobilities and ON/OFF current ratios on the order of 10(-3) cm(2)/V.s and 10(3)-10(4), respectively. The lifetime test of microribbon devices under various humidity conditions is found to be very sustainable over 100 days. Moreover, illuminating these microribbons could profoundly induce photocurrents in the visible light range, presenting good responsivity of 9.5 A/W and a high external quantum efficiency up to 2000% under 1.9 mW/cm(2). In addition, these microribbon devices are processed from solution-phase at temperatures below 100 degrees C, making the technology a viable candidate for low-cost and plastic-based organic optoelectronic applications.
Zinc Oxide Nanowire-Poly(Methyl Methacrylate) Dielectric Layers for Polymer Capacitive Pressure Sensors
(2015-01-14)
Chen, Yan-Sheng
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Hsieh, Gen-Wen
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Chen, Shih-Ping
;
Tseng, Pin-Yen
;
Wang, Cheng-Wei
Polymer capacitive pressure sensors based on a dielectric composite layer of zinc oxide nanowire and poly(methyl methacrylate) show pressure sensitivity in the range of 2.63 x 10(-3) to 9.95 x 10(-3) cm(2) gf(-1). This represents an increase of capacitance change by as much as a factor of 23 over pristine polymer devices. An ultralight load of only 10 mg (corresponding to an applied pressure of similar to 0.01 gf cm(-2)) can be clearly recognized, demonstrating remarkable characteristics of these nanowire-polymer capacitive pressure sensors. In addition, optical transmittance of the dielectric composite layer is approximately 90% in the visible wavelength region. Their low processing temperature, transparency, and flexible dielectric film makes them a highly promising means for flexible touching and pressure-sensing applications.