%0 Journal Article %1 ADFM:ADFM201704507 %A Tang, Ailing %A Xiao, Bo %A Wang, Yuming %A Gao, Feng %A Tajima, Keisuke %A Bin, Haijun %A Zhang, Zhi-Guo %A Li, Yongfang %A Wei, Zhixiang %A Zhou, Erjun %D 2017 %J Advanced Functional Materials %K nonfullerenacceptor organics %P n/a--n/a %R 10.1002/adfm.201704507 %T Simultaneously Achieved High Open-Circuit Voltage and Efficient Charge Generation by Fine-Tuning Charge-Transfer Driving Force in Nonfullerene Polymer Solar Cells %U http://dx.doi.org/10.1002/adfm.201704507 %X To maximize the short-circuit current density (JSC) and the open circuit voltage (VOC) simultaneously is a highly important but challenging issue in organic solar cells (OSCs). In this study, a benzotriazole-based p-type polymer (J61) and three benzotriazole-based nonfullerene small molecule acceptors (BTA1-3) are chosen to investigate the energetic driving force for the efficient charge transfer. The lowest unoccupied molecular orbital (LUMO) energy levels of small molecule acceptors can be fine-tuned by modifying the end-capping units, leading to high VOC (1.15–1.30 V) of OSCs. Particularly, the LUMO energy level of BTA3 satisfies the criteria for efficient charge generation, which results in a high VOC of 1.15 V, nearly 65% external quantum efficiency, and a high power conversion efficiency (PCE) of 8.25%. This is one of the highest VOC in the high-performance OSCs reported to date. The results imply that it is promising to achieve both high JSC and VOC to realize high PCE with the carefully designed nonfullerene acceptors.

@article{ADFM:ADFM201704507, abstract = {To maximize the short-circuit current density (JSC) and the open circuit voltage (VOC) simultaneously is a highly important but challenging issue in organic solar cells (OSCs). In this study, a benzotriazole-based p-type polymer (J61) and three benzotriazole-based nonfullerene small molecule acceptors (BTA1-3) are chosen to investigate the energetic driving force for the efficient charge transfer. The lowest unoccupied molecular orbital (LUMO) energy levels of small molecule acceptors can be fine-tuned by modifying the end-capping units, leading to high VOC (1.15–1.30 V) of OSCs. Particularly, the LUMO energy level of BTA3 satisfies the criteria for efficient charge generation, which results in a high VOC of 1.15 V, nearly 65% external quantum efficiency, and a high power conversion efficiency (PCE) of 8.25%. This is one of the highest VOC in the high-performance OSCs reported to date. The results imply that it is promising to achieve both high JSC and VOC to realize high PCE with the carefully designed nonfullerene acceptors.}, added-at = {2018-01-08T11:33:54.000+0100}, author = {Tang, Ailing and Xiao, Bo and Wang, Yuming and Gao, Feng and Tajima, Keisuke and Bin, Haijun and Zhang, Zhi-Guo and Li, Yongfang and Wei, Zhixiang and Zhou, Erjun}, biburl = {https://www.bibsonomy.org/bibtex/2fea4e78b7e5d5f84e9725c44d6a31a01/cgoehler}, description = {onlinelibrary.wiley.com/doi/10.1002/adfm.201704507/epdf}, doi = {10.1002/adfm.201704507}, interhash = {a76dd82f601dca9b44d0b8a12a92f654}, intrahash = {fea4e78b7e5d5f84e9725c44d6a31a01}, issn = {1616-3028}, journal = {Advanced Functional Materials}, keywords = {nonfullerenacceptor organics}, pages = {n/a--n/a}, timestamp = {2018-01-08T11:33:54.000+0100}, title = {Simultaneously Achieved High Open-Circuit Voltage and Efficient Charge Generation by Fine-Tuning Charge-Transfer Driving Force in Nonfullerene Polymer Solar Cells}, url = {http://dx.doi.org/10.1002/adfm.201704507}, year = 2017 }