%0 Journal Article %1 ADMA:ADMA201704271 %A Xu, Xiaopeng %A Bi, Zhaozhao %A Ma, Wei %A Wang, Zishuai %A Choy, Wallace C. H. %A Wu, Wenlin %A Zhang, Guangjun %A Li, Ying %A Peng, Qiang %D 2017 %J Advanced Materials %K efficiency nonfullerene organics ternary %P n/a--n/a %R 10.1002/adma.201704271 %T Highly Efficient Ternary-Blend Polymer Solar Cells Enabled by a Nonfullerene Acceptor and Two Polymer Donors with a Broad Composition Tolerance %U http://dx.doi.org/10.1002/adma.201704271 %X In this work, highly efficient ternary-blend organic solar cells (TB-OSCs) are reported based on a low-bandgap copolymer of PTB7-Th, a medium-bandgap copolymer of PBDB-T, and a wide-bandgap small molecule of SFBRCN. The ternary-blend layer exhibits a good complementary absorption in the range of 300–800 nm, in which PTB7-Th and PBDB-T have excellent miscibility with each other and a desirable phase separation with SFBRCN. In such devices, there exist multiple energy transfer pathways from PBDB-T to PTB7-Th, and from SFBRCN to the above two polymer donors. The hole-back transfer from PTB7-Th to PBDB-T and multiple electron transfers between the acceptor and the donor materials are also observed for elevating the whole device performance. After systematically optimizing the weight ratio of PBDB-T:PTB7-Th:SFBRCN, a champion power conversion efficiency (PCE) of 12.27% is finally achieved with an open-circuit voltage (Voc) of 0.93 V, a short-circuit current density (Jsc) of 17.86 mA cm−2, and a fill factor of 73.9%, which is the highest value for the ternary OSCs reported so far. Importantly, the TB-OSCs exhibit a broad composition tolerance with a high PCE over 10% throughout the whole blend ratios.

@article{ADMA:ADMA201704271, abstract = {In this work, highly efficient ternary-blend organic solar cells (TB-OSCs) are reported based on a low-bandgap copolymer of PTB7-Th, a medium-bandgap copolymer of PBDB-T, and a wide-bandgap small molecule of SFBRCN. The ternary-blend layer exhibits a good complementary absorption in the range of 300–800 nm, in which PTB7-Th and PBDB-T have excellent miscibility with each other and a desirable phase separation with SFBRCN. In such devices, there exist multiple energy transfer pathways from PBDB-T to PTB7-Th, and from SFBRCN to the above two polymer donors. The hole-back transfer from PTB7-Th to PBDB-T and multiple electron transfers between the acceptor and the donor materials are also observed for elevating the whole device performance. After systematically optimizing the weight ratio of PBDB-T:PTB7-Th:SFBRCN, a champion power conversion efficiency (PCE) of 12.27% is finally achieved with an open-circuit voltage (Voc) of 0.93 V, a short-circuit current density (Jsc) of 17.86 mA cm−2, and a fill factor of 73.9%, which is the highest value for the ternary OSCs reported so far. Importantly, the TB-OSCs exhibit a broad composition tolerance with a high PCE over 10% throughout the whole blend ratios.}, added-at = {2017-11-06T11:46:25.000+0100}, author = {Xu, Xiaopeng and Bi, Zhaozhao and Ma, Wei and Wang, Zishuai and Choy, Wallace C. H. and Wu, Wenlin and Zhang, Guangjun and Li, Ying and Peng, Qiang}, biburl = {https://www.bibsonomy.org/bibtex/2e971391d36cd0294776af67a12a1d406/fabianopkm}, description = {Highly Efficient Ternary-Blend Polymer Solar Cells Enabled by a Nonfullerene Acceptor and Two Polymer Donors with a Broad Composition Tolerance - Xu - 2017 - Advanced Materials - Wiley Online Library}, doi = {10.1002/adma.201704271}, interhash = {a274b33bed4005b528b9c6c45ea47ffd}, intrahash = {e971391d36cd0294776af67a12a1d406}, issn = {1521-4095}, journal = {Advanced Materials}, keywords = {efficiency nonfullerene organics ternary}, pages = {n/a--n/a}, timestamp = {2017-11-06T11:46:25.000+0100}, title = {Highly Efficient Ternary-Blend Polymer Solar Cells Enabled by a Nonfullerene Acceptor and Two Polymer Donors with a Broad Composition Tolerance}, url = {http://dx.doi.org/10.1002/adma.201704271}, year = 2017 }