New A-A-D-A-A-type electron donors for small molecule organic solar cells |
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Authors: | Lin Li-Yen Lu Chih-Wei Huang Wei-Ching Chen Yi-Hong Lin Hao-Wu Wong Ken-Tsung |
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Institution: | Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan. |
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Abstract: | Two A-A-D-A-A-type molecules (BCNDTS and BDCDTS), where two terminal electron-withdrawing cyano or dicyanovinylene moieties are connected to a central dithienosilole core through another electron-accepting 2,1,3-benzothiadiazole block, have been synthesized, characterized, and employed as electron donors for small molecule organic solar cells. Vacuum-deposited bilayer and planar mixed heterojunction devices based on BCNDTS and fullerene acceptors (C(60) or C(70)) exhibited decent power conversion efficiencies of 2.3% and 3.7%, respectively. |
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