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13 November 2007 High open-circuit-voltage organic solar cell based on two solution-processible triphenylamine-containing compounds
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Abstract
Two solution-processible linear organic conjugated molecules with an electron-deficient core and triphenylamine (TPA) end groups, TPA-DCM-TPA and TPA-th-TPA, were used as donor and acceptor materials respectively in fabricating all organic solar cells (OSCs) by spin-coating method. Both the LUMO and HOMO energy levels of TPA-th-TPA are lower than those of TPA-DCM-TPA, which makes TPA-th-TPA a suitable acceptor for the OSCs with TPA-DCM-TPA as donor. The all OSC based on the blend of TPA-DCM-TPA and TPA-th-TPA (1:1, w/w) with LiF/Al as cathode, showed the photo-sensitivity in a broad wavelength range from 380 nm to 700 nm, high open-circuit-voltage (Voc) of 1.21 V, and a power conversion efficiency of 0.21% under the illumination of AM 1.5, 100 mW/cm2. The high Voc of the device is benefited from the higher LUMO energy level of the TPA-th-TPA acceptor in comparison with that of the traditional acceptor PCBM.
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Chang He, Qingguo He, Guanglong Wu, Fenglian Bai, and Yongfang Li "High open-circuit-voltage organic solar cell based on two solution-processible triphenylamine-containing compounds", Proc. SPIE 6656, Organic Photovoltaics VIII, 66560Z (13 November 2007); https://doi.org/10.1117/12.732802
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