標題: 2-Alkyl-5-thienyl-Substituted Benzo[1,2-b:4,5-b ']dithiophene-Based Donor Molecules for Solution-Processed Organic Solar Cells
作者: Patra, Dhananjaya
Huang, Tzu-Yen
Chiang, Chao-Cheng
Maturana, Ramon Orlando Valencia
Pao, Chun-Wei
Ho, Kuo-Chuan
Wei, Kung-Hwa
Chu, Chih-Wei
材料科學與工程學系
光電工程學系
Department of Materials Science and Engineering
Department of Photonics
關鍵字: solution-processed small-molecule;donor-acceptor;organic solar cells;power conversion efficiency;benzo[1,2-b:4,S-b ']dithiophenes;external quantum efficiency
公開日期: 9-十月-2013
摘要: In this study, we have strategically designed and convergently synthesized two novel, symmetrical, and linear A-D-A-type pi-conjugated donor molecules (TBDTCNR, TBDTCN), each containing a planar electron-rich 2-octylthiene-5-yl-substituted benzodithiophene (TBDT) unit as the core, flanked by octylthiophene units and end-capped with electron-deficient cyanoacetate (CNR) or dicyanovinyl (CN) units. We thoroughly characterized both of these materials and investigated the effects of the end groups (CNR, CN) on their optical, electrochemical, morphological, and photovoltaic properties. We then fabricated solution-processed bulk heterojunction organic solar cells incorporating TBDTCNR and TBDTCN. Among our tested devices, the one containing TBDTCNR and [6,6]-phenyl-C-61-butyric acid methyl ester in a 1:0.40 ratio (w/w) exhibited the highest power conversion efficiency (5.42%) with a short-circuit current density (J(sc)) of 9.08 mA cm(-2), an open circuit voltage (V-oc) of 0.90 V, and an impressive fill factor (FF) of 0.66 under AM 1.5G irradiation (100 mW cm(-2)). The FFs of these solution-processed small-molecule organic solar cells (SMOSCs) are outstanding when compared with those recently reported for benzodithiophene (BDT)-based SMOSCs, because of the high crystallinity and excellent stacking properties of the TBDT-based compounds.
URI: http://dx.doi.org/10.1021/am4021928
http://hdl.handle.net/11536/22981
ISSN: 1944-8244
DOI: 10.1021/am4021928
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 5
Issue: 19
起始頁: 9494
結束頁: 9500
顯示於類別:期刊論文


文件中的檔案:

  1. 000326356600034.pdf