%0 Journal Article %1 liao2018mapping %A Liao, Xunfan %A Yao, Zhaoyang %A Gao, Ke %A Shi, Xueliang %A Zuo, Lijian %A Zhu, Zonglong %A Chen, Lie %A Liu, Feng %A Chen, Yiwang %A Jen, Alex K.‐Y. %D 2018 %I Wiley Online Library %J Advanced Energy Materials %K high_PCE new_material nonfullerene organic %R 10.1002/aenm.201801214 %T Mapping Nonfullerene Acceptors with a Novel Wide Bandgap Polymer for High Performance Polymer Solar Cells %U https://doi.org/10.1002/aenm.201801214 %X A new weak electron‐deficient building block, bis(2‐ethylhexyl) 2,5‐bis(5‐bromothiophen‐2‐yl) thieno3,2‐bthiophene‐3,6‐dicarboxylate (TT‐Th), is incorporated to construct a wide‐bandgap (1.88 eV) polymer PBDT‐TT for nonfullerene polymer solar cells (NF‐PSCs). PBDT‐TT possesses suitable energy levels and complementary absorption when blended with both ITIC analogues (ITIC and IT‐M) and a near‐infrared (NIR) acceptor (6TIC). Moreover, PBDT‐TT exhibits good conjugated planarity and preferable face‐on orientation in the blended thin film, which are beneficial for charge transfer and carrier transport. The PSCs based on PBDT‐TT:IT‐M and PBDT‐TT:6TIC blend films yield high power conversion efficiencies of 11.38% and 11.03%, respectively. To the best of the authors' knowledge, the PCE of 11.03% for PBDT‐TT:6TIC‐based device is one of the highest values reported for NIR NF‐PSCs. This work demonstrates that TT‐Th is a useful new electron‐accepting building block for making p‐type wide bandgap polymers for efficient NIR NF‐PSCs. A novel weak electron‐deficient moiety TT‐Th is developed and used to construct a wide‐bandgap donor polymer PBDT‐TT for efficient nonfullerene polymer solar cells (NF‐PSCs). The wide‐bandgap polymer PBDT‐TT can simultaneously match with ITIC‐analogues and near‐infrared acceptors in NF‐PSCs with power conversion efficiency both over 11%. This work indicates that PBDT‐TT is another promising candidate for efficient nonfullerene PSCs.

@article{liao2018mapping, abstract = {A new weak electron‐deficient building block, bis(2‐ethylhexyl) 2,5‐bis(5‐bromothiophen‐2‐yl) thieno[3,2‐b]thiophene‐3,6‐dicarboxylate (TT‐Th), is incorporated to construct a wide‐bandgap (1.88 eV) polymer PBDT‐TT for nonfullerene polymer solar cells (NF‐PSCs). PBDT‐TT possesses suitable energy levels and complementary absorption when blended with both ITIC analogues (ITIC and IT‐M) and a near‐infrared (NIR) acceptor (6TIC). Moreover, PBDT‐TT exhibits good conjugated planarity and preferable face‐on orientation in the blended thin film, which are beneficial for charge transfer and carrier transport. The PSCs based on PBDT‐TT:IT‐M and PBDT‐TT:6TIC blend films yield high power conversion efficiencies of 11.38% and 11.03%, respectively. To the best of the authors' knowledge, the PCE of 11.03% for PBDT‐TT:6TIC‐based device is one of the highest values reported for NIR NF‐PSCs. This work demonstrates that TT‐Th is a useful new electron‐accepting building block for making p‐type wide bandgap polymers for efficient NIR NF‐PSCs. A novel weak electron‐deficient moiety TT‐Th is developed and used to construct a wide‐bandgap donor polymer PBDT‐TT for efficient nonfullerene polymer solar cells (NF‐PSCs). The wide‐bandgap polymer PBDT‐TT can simultaneously match with ITIC‐analogues and near‐infrared acceptors in NF‐PSCs with power conversion efficiency both over 11%. This work indicates that PBDT‐TT is another promising candidate for efficient nonfullerene PSCs.}, added-at = {2018-07-16T11:31:31.000+0200}, author = {Liao, Xunfan and Yao, Zhaoyang and Gao, Ke and Shi, Xueliang and Zuo, Lijian and Zhu, Zonglong and Chen, Lie and Liu, Feng and Chen, Yiwang and Jen, Alex K.‐Y.}, biburl = {https://www.bibsonomy.org/bibtex/2b1f5f44aef4ec9bd65da722d4052bdd6/bretschneider_m}, doi = {10.1002/aenm.201801214}, interhash = {5d78dbc114bd0d6fb8f839c102c8f6f0}, intrahash = {b1f5f44aef4ec9bd65da722d4052bdd6}, issn = {1614-6832}, journal = {Advanced Energy Materials}, keywords = {high_PCE new_material nonfullerene organic}, month = {6}, publisher = {Wiley Online Library}, timestamp = {2018-07-16T11:31:31.000+0200}, title = {Mapping Nonfullerene Acceptors with a Novel Wide Bandgap Polymer for High Performance Polymer Solar Cells}, url = {https://doi.org/10.1002/aenm.201801214}, year = 2018 }