Browsing by Author "Lin, Jiann-Tsuen"

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A ternary cascade structure enhances the efficiency of polymer solar cells
(2010)
Huang, Jen-Hsien
;
Velusamy, Marappan
;
Ho, Kuo-Chuan
;
Lin, Jiann-Tsuen
;
Chu, Chih-Wei
In this study, a novel solution-processed small molecule (TQTFA) for use as an electron donor has been incorporated into organic solar cells based on poly(3-hexylthiophene) (P3HT) and (6,6)-phenyl C71-butyric acid methyl (PC[70]BM). The combination of TQTFA with P3HT and PC[70]BM allows not only a broad absorption but also tuning of the inter energy level leading to a higher short-circuit current (J(SC)) and open-circuit voltage (V(OC)). The best performing devices exhibited a power conversion efficiency of 4.50%. The efficiency is increased by almost 15% when compared to the one without TQTFA.
Influence of molecular weight on silole-containing cyclopentadithiophene polymer and its impact on the electrochromic properties
(2012-03-01)
Huang, Jen-Hsien
;
Huang, Annie Tzuyu
;
Hsu, Chih-Yu
;
Lin, Jiann-Tsuen
;
Chu, Chih-Wei
In this article, we have systematically studied the effect of molecular weight on poly[(4,4'-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(5,5'-thienyl-4,4'-dihexyl-2,2'bithiazole)-2,6-diyl], a novel cathodically coloring electrochromic polymer. The polymer with higher molecular weight can stack much better due to the stronger pi-pi* interaction and was found to exhibit better charge transfer property and lower internal resistance. These results have shown to enhance the coloration efficiency of the polymer remarkably. For the molecular weight of 33.6 kg/mol, the coloration efficiency is 423 cm(2)/C, much higher compared with the low molecular weight polymer (6.3 kg/mol, 226 cm(2)/C). (C) 2011 Elsevier B.V. All rights reserved.