Structure-properties relationships in triarylamine-based donor-acceptor molecules containing naphtyl groups as donor material for organic solar cells

Scientific Reports
Salma MohamedJean Roncali

Abstract

The effects of replacing the phenyl rings of triphenylamine (TPA) by naphtyl groups are analysed on a series of push-pull molecules containing a 2-thienyl-dicyanovinyl acceptor group. UV-Vis absorption spectroscopy and cyclic voltammetry show that the introduction of one or two naphtyl groups in the structure has limited effects on the optical properties and energy levels of the molecule. On the other hand, the evaluation of the compounds as donor material in bi-layer solar cells with C60 as acceptor shows that the number and mode of linkage of the naphtyl groups exert a marked influence on the power conversion efficiency (PCE) of the cell. Two naphtyl groups lead to a decrease of PCE with respect to TPA, while a single naphtyl group produces opposite effects depending on the linking mode. Compared to TPA, an alpha-naphtyl group leads to a small decrease of PCE while in contrast a beta-naphtyl leads to a ~35% increase of PCE due to improved short-circuit current density (Jsc) and fill-factor. The determination of the hole-mobility of these two donors by the space-charge-limited current method shows that these effects are correlated with the higher hole-mobility of the β-naphtyl compound.

References

Apr 13, 2007·Chemical Reviews·Serap GünesNiyazi Serdar Sariciftci
Jul 8, 2009·Accounts of Chemical Research·Jean Roncali
Sep 30, 2009·Chemical Reviews·Yen-Ju ChengChain-Shu Hsu
Jun 19, 2010·Chemical Communications : Chem Comm·Theodulf RousseauJean Roncali
Jul 21, 2010·Chemistry : a European Journal·Frank Würthner, Klaus Meerholz
Mar 29, 2012·Chemical Society Reviews·Yuze LinXiaowei Zhan
Jul 31, 2012·Chemical Communications : Chem Comm·Antoine LeliègeJean Roncali
Aug 2, 2013·Accounts of Chemical Research·Yongsheng ChenGuankui Long
Aug 30, 2013·Accounts of Chemical Research·Jessica E CoughlinGuillermo C Bazan
Apr 2, 2014·Advanced Materials·Jean RoncaliPhilippe Blanchard

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Citations

Sep 14, 2016·ACS Applied Materials & Interfaces·Moon Gyu HanSangyoon Lee
Oct 11, 2016·Chemical Reviews·Oksana Ostroverkhova
Mar 5, 2019·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Clément CabanetosJean Roncali
Jan 16, 2019·Advanced Science·Jean Roncali, Ion Grosu

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