%0 Journal Article %1 doi:10.1021/jacs.6b06291 %A Li, Zhong’an %A Zhu, Zonglong %A Chueh, Chu-Chen %A Jo, Sae Byeok %A Luo, Jingdong %A Jang, Sei-Hum %A Jen, Alex K.-Y. %D 2016 %J Journal of the American Chemical Society %K hole-transport-layer perovskite %N 36 %P 11833-11839 %R 10.1021/jacs.6b06291 %T Rational Design of Dipolar Chromophore as an Efficient Dopant-Free Hole-Transporting Material for Perovskite Solar Cells %U http://dx.doi.org/10.1021/jacs.6b06291 %V 138 %X In this paper, an electron donor–acceptor (D-A) substituted dipolar chromophore (BTPA-TCNE) is developed to serve as an efficient dopant-free hole-transporting material (HTM) for perovskite solar cells (PVSCs). BTPA-TCNE is synthesized via a simple reaction between a triphenylamine-based Michler’s base and tetracyanoethylene. This chromophore possesses a zwitterionic resonance structure in the ground state, as evidenced by X-ray crystallography and transient absorption spectroscopies. Moreover, BTPA-TCNE shows an antiparallel molecular packing (i.e., centrosymmetric dimers) in its crystalline state, which cancels out its overall molecular dipole moment to facilitate charge transport. As a result, BTPA-TCNE can be employed as an effective dopant-free HTM to realize an efficient (PCE ≈ 17.0\%) PVSC in the conventional n-i-p configuration, outperforming the control device with doped spiro-OMeTAD HTM.

@article{doi:10.1021/jacs.6b06291, abstract = { In this paper, an electron donor–acceptor (D-A) substituted dipolar chromophore (BTPA-TCNE) is developed to serve as an efficient dopant-free hole-transporting material (HTM) for perovskite solar cells (PVSCs). BTPA-TCNE is synthesized via a simple reaction between a triphenylamine-based Michler’s base and tetracyanoethylene. This chromophore possesses a zwitterionic resonance structure in the ground state, as evidenced by X-ray crystallography and transient absorption spectroscopies. Moreover, BTPA-TCNE shows an antiparallel molecular packing (i.e., centrosymmetric dimers) in its crystalline state, which cancels out its overall molecular dipole moment to facilitate charge transport. As a result, BTPA-TCNE can be employed as an effective dopant-free HTM to realize an efficient (PCE ≈ 17.0\%) PVSC in the conventional n-i-p configuration, outperforming the control device with doped spiro-OMeTAD HTM. }, added-at = {2017-02-23T09:25:06.000+0100}, author = {Li, Zhong’an and Zhu, Zonglong and Chueh, Chu-Chen and Jo, Sae Byeok and Luo, Jingdong and Jang, Sei-Hum and Jen, Alex K.-Y.}, biburl = {https://www.bibsonomy.org/bibtex/2fe8a4e371832de42d9875b9c1c2a5c68/baumbach}, description = {Rational Design of Dipolar Chromophore as an Efficient Dopant-Free Hole-Transporting Material for Perovskite Solar Cells - Journal of the American Chemical Society (ACS Publications)}, doi = {10.1021/jacs.6b06291}, eprint = {http://dx.doi.org/10.1021/jacs.6b06291}, interhash = {7b16fc008b9e684cf7a656c660ceb850}, intrahash = {fe8a4e371832de42d9875b9c1c2a5c68}, journal = {Journal of the American Chemical Society}, keywords = {hole-transport-layer perovskite}, note = {PMID: 27552001}, number = 36, pages = {11833-11839}, timestamp = {2017-02-23T09:25:06.000+0100}, title = {Rational Design of Dipolar Chromophore as an Efficient Dopant-Free Hole-Transporting Material for Perovskite Solar Cells}, url = {http://dx.doi.org/10.1021/jacs.6b06291}, volume = 138, year = 2016 }