Browsing by Author "Lin, Yen-Chung"

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Adaptive current scaling pixel circuit for a-Si : H AMOLED
(2005)
Huang, Jian-Zhi
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Cheng, Jung-An
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Lin, Yen-Chung
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Cheng, Wayne
;
Shieh, Han-Ping D.
An adaptive current scaling pixel circuit for a-Si:H TFT process has been demonstrated. The adaptive current scaling is achieved by insetting a small cascaded storage capacitor to the traditional pixel circuit without affecting the aperture ratio. The proposed pixel circuit is capable of shorting the programming time without sacrificing the power consumption. Hence, the proposed pixel circuit is suitable for the large size and high resolution AMOLED application.
Current-scaling a-Si : H TFT pixel-electrode circuit for AM-OLEDs: Electrical properties and stability
(2007-09-01)
Lee, Hojin
;
Lin, Yen-Chung
;
Shieh, Han-Ping D.
;
Kanicki, Jerzy
;
顯示科技研究所
We fabricated and characterized the hydrogenate amorphous-silicon thin-film transistor (a-Si:H TFT) pixel-electrode circuit with the current-scaling function that can be used for active-matrix organic light-emitting displays (AM-OLEDs). As expected from previously reported simulation results, the fabricated pixel-electrode circuit showed an enhanced current-scaling performance for a high-resolution AM-OLED based on a-Si:H TFTs in comparison to other types of current-driven pixel circuits. It also showed a better electrical and thermal stability for different OLED current levels in comparison to the conventional current-driven pixel-electrode circuit.
Large-area blade-coated organic solar cells processed from halogen-free solvent
(2019-12-01)
Chen, Szu-Han
;
Liao, Chung-Hung
;
Chang, Chih-Yu
;
Huang, Kuan-Min
;
Chen, Jen-Yueh
High performance organic solar cells (OSCs) are generally prepared by halogenated solvents, which are detrimental to the environment and human health. The replacement of hazardous halogenated solvents is a priority in the commercialization of solution-processed OSCs. In this study, poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl) benzo [1,2-b;4,5-b'] dithiophene-2,6-diyl-alt-(4- (2-ethylhexyl)-3-fluorothieno [3,4-b] thiophene-)-2-carboxylate-2-6-diyl)] (PBDTTT-EFT):[6,6]-phenyl C-71 -butyric acid methyl ester (PC71BM)-based device processed with binary halogen-free solvents (toluene and N-methyl-2-pyrrolidone) is fabricated by blade-coating method. Through the combination of morphological manipulation of active layer and interfacial engineering, the resulting OSCs deliver a promising power conversion efficiency (PCE) up to 11.09%. Importantly, large-area (216 cm(2)) blade-coated bulk-heterojunction OSCs is also demonstrated, and the resulting devices deliver a high PCE up to 5.03%, which is comparable to those of the devices processed with halogenated solvents (PCE = 5.20%). Additionally, the devices processed with halogen-free solvents also exhibit superior stability, maintaining 88% of its initial efficiency after 3960 h of continuous operation. More encouragingly, halogen-free solvents-based manufacturing process can also be performed under ambient conditions, and a moderate PCE of 3.67% is attained for large-area (216 cm(2)) OSCs. To the best of our knowledge, 3.67% represents the highest efficiency ever reported for air-processed large-area OSCs. This work paves the way towards the realization of environmentally-friendly large-area OSCs with high performance and long-term stability.