title: Organic Dyes Incorporating the Dithieno[3,2-f:2',3'-h]quinoxaline Moiety for Dye-Sensitized Solar Cells.
abstract: New donor-acceptor'-acceptor-type sensitizers (QBT dyes), comprising arylamine as the electron donor, dithieno[3,2-f:2',3'-h]quinoxaline as the internal acceptor, and 2-cyanoacrylic acid as both the acceptor and anchor, have been synthesized. The QBT dyes have broad absorption spectra covering the range of λ=368-487 nm with a highest molar extinction coefficient of up to approximately 40 000 M(-1)  cm(-1) . The light-to-electricity conversion efficiencies of the dye-sensitized solar cells (DSSCs) fabricated from the dyes range from 6.11 to 7.59 % under simulated AM 1.5 G illumination. Upon addition of a threefold concentration of chenodeoxycholic acid as the co-adsorbent, the best performance cell has a power-conversion efficiency of 8.41 %, which is higher than that of the N719-based standard DSSC (8.27 %).
authors: Institute of Chemistry, Academia Sinica, Nankang 11529, Taipei (Taiwan)ca.edu.tw.
authors: Jen-Shyang
authors: JS
authors: Ni
authors: Institute of Chemistry, Academia Sinica, Nankang 11529, Taipei (Taiwan)ca.edu.tw.
authors: Wei-Siang
authors: WS
authors: Kao
authors: Department of Chemistry, National Central University, Chungli 32001 (Taiwan)ca.edu.tw.
authors: Hao-Ju
authors: HJ
authors: Chou
authors: Institute of Chemistry, Academia Sinica, Nankang 11529, Taipei (Taiwan)ca.edu.tw. jtlin@gate.sini, jtlin@gate.sini.|Department of Chemistry, National Central University, Chungli 32001 (Taiwan)ca.edu.tw. jtlin@gate.sini, jtlin@gate.sini.
authors: Jiann T
authors: JT
authors: Lin
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D009930:Organic Chemicals / Q000737:chemistry*; D011810:Quinoxalines / Q000737:chemistry*; D012993:Solar Energy; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004396:Coloring Agents; D009930:Organic Chemicals; D011810:Quinoxalines
keywords: donor-acceptor systems; dyes; energy conversion; sensitizers; solar cells