ja205126t_si_002.pdf (1.19 MB)
A Low-Energy-Gap Organic Dye for High-Performance Small-Molecule Organic Solar Cells
journal contribution
posted on 2011-10-12, 00:00 authored by Li-Yen Lin, Yi-Hong Chen, Zheng-Yu Huang, Hao-Wu Lin, Shu-Hua Chou, Francis Lin, Chang-Wen Chen, Yi-Hung Liu, Ken-Tsung WongA novel donor–acceptor–acceptor (D–A–A) donor molecule, DTDCTB, in which an electron-donating ditolylaminothienyl moiety and an electron-withdrawing dicyanovinylene moiety are bridged by another electron-accepting 2,1,3-benzothiadiazole block, has been synthesized and characterized. A vacuum-deposited organic solar cell employing DTDCTB combined with the electron acceptor C70 achieved a record-high power conversion efficiency (PCE) of 5.81%. The respectable PCE is attributed to the solar spectral response extending to the near-IR region and the ultracompact absorption dipole stacking of the DTDCTB thin film.
