https://scholars.lib.ntu.edu.tw/handle/123456789/390573
標題: | Peripheral group effects on the photophysical and photovoltaic properties of bulk-heterojunction type solar cells based on star-shaped conjugate molecules with triphenylamine core | 作者: | Kao, Y.-W. Lee, W.-H. Jeng, R.-J. Huang, C.-F. Wu, J.Y. Lee, R.-H. RU-JONG JENG |
關鍵字: | Bulk heterojunction cell; Photovoltaic performance; Star-shaped molecules; Triphenylamine | 公開日期: | 2015 | 卷: | 163 | 起(迄)頁: | 138-151 | 來源出版物: | Materials Chemistry and Physics | 摘要: | In this study we prepared three star-shaped, triphenylamine-cored conjugated molecules, possessing thienylenevinylene units as conjugated π bridges and thienyl, 2-ethylhexyl cyanoacetate, and 1,3-diethyl-2-thiobarbituric acid moieties, respectively, as peripheral groups - for use as donor materials in small molecule/fullerene bulk heterojunction-type organic photovoltaic cells (OPVs). The peripheral groups affected the UV-Vis absorption behavior and electrochemical properties of star-shaped molecules, and photovoltaic performance of the star-shaped molecules based OPVs. The wavelength of maximum absorption for star-shaped molecule with 1,3-diethyl-2-thiobarbituric acid moiety was red-shifted relative to those of molecules with thienyl and 2-ethylhexyl cyanoacetate groups, while molecule with thienyl moiety exhibited the largest hole mobility. The photovoltaic properties of cells incorporating molecule with thienyl group and a fullerene derivative were better than those containing corresponding molecule with 2-ethylhexyl cyanoacetate/fullerene or molecule with 1,3-diethyl-2-thiobarbituric acid/fullerene blends. An OPV featuring molecule with thienyl group/fullerene derivative (1:3, w/w) as the active layer exhibited a power conversion efficiency of 1.43%, a short-circuit current density of 5.23 mA/cm2, an open-circuit voltage of 0.73 V, and a fill factor of 0.37. © 2015 Elsevier B.V. All rights reserved. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84940461580&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/390573 |
DOI: | 10.1016/j.matchemphys.2015.07.024 | SDG/關鍵字: | Heterojunctions; Hole mobility; Open circuit voltage; Organic solar cells; Photoelectrochemical cells; Photovoltaic cells; Photovoltaic effects; Red Shift; Solar power generation; Stars; Bulk heterojunction; Conjugated molecules; Organic photovoltaic cell (OPVs); Photovoltaic performance; Photovoltaic property; Power conversion efficiencies; Star-shaped molecules; Triphenyl amines; Molecules |
顯示於: | 高分子科學與工程學研究所 |
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