Zobraziť v EDS

20.5 % efficient ternary organic photovoltaics using an asymmetric small-molecular acceptor to manipulate intermolecular packing and reduce energy losses

Uložené v:
Podrobná bibliografia
Názov: 20.5 % efficient ternary organic photovoltaics using an asymmetric small-molecular acceptor to manipulate intermolecular packing and reduce energy losses
Autori: Ling, Zhaoheng, Wu, Jingnan, 1994, Jurado, José P., Petoukhoff, Christopher E., Jeong, Sang Young, Naphade, Dipti R., Babics, Maxime, Chang, Xiaoming, Faber, Hendrik, Doukas, Spyros, Lidorikis, E., Nugraha, Mohamad Insan, He, Mingjie, Alqurashi, Maryam, Lin, Y. B., Sun, Xiaokang, Hu, Hanlin, Woo, Han Young, De Wolf, Stefaan, Tsetseris, Leonidas, Laquai, Frédéric, Yu, Donghong, Wang, Ergang, 1981, Anthopoulos, Thomas D.
Zdroj: Material Designing for Photomultiplication Type Organic Photodetectors and Performance Optimization Materials Science and Engineering: R: Reports. 163
Predmety: Intermolecular packing, Energy loss, Asymmetric non-fullerene small molecular acceptor, High efficiency ternary organic photovoltaics
Popis: Oligomeric acceptors are increasingly recognized as promising n-type materials for organic photovoltaics (OPVs) due to their precise molecular structures, long-term stability, and high efficiency. However, inferior molecular packing and high energy losses have hindered their further use. Here, we overcome these challenges by developing an asymmetric small molecular acceptor (SMA), BTP-J17, and applying it as the second acceptor component in OPVs composed of PM6:DIBP3F-Se:BTP-J17 (refer to our recent work on dimeric acceptor DIBP3F-Se). The BTP-J17 is very miscible with the DIBP3F-Se and appears to diffuse into the host donor-acceptor interface. The ensuing ternary cells exhibit enhanced exciton dissociation, improved carrier mobility, and more efficient charge extraction. Optimised OPVs based on PM6:DIBP3F-Se:BTP-J17 show enhanced open-circuit voltage (VOC) while maintaining the high short-circuit current (JSC) from the binary blends, boosting the power conversion efficiency (PCE) from 18.40 % to 19.60 %. By integrating MgF2 as an antireflection coating and n-doping the ternary BHJ with ethyl viologen (EV), we were able to further boost the PCE to 20.5 % (uncertified) and simultaneously extended the outdoor stability to seven weeks. Our findings highlight the crucial role of asymmetric SMA as an additional component for boosting the performance and stability of OPVs.
Popis súboru: electronic
Prístupová URL adresa: https://research.chalmers.se/publication/549169
https://research.chalmers.se/publication/549169/file/549169_Fulltext.pdf
Databáza: SwePub
Popis
Abstrakt:Oligomeric acceptors are increasingly recognized as promising n-type materials for organic photovoltaics (OPVs) due to their precise molecular structures, long-term stability, and high efficiency. However, inferior molecular packing and high energy losses have hindered their further use. Here, we overcome these challenges by developing an asymmetric small molecular acceptor (SMA), BTP-J17, and applying it as the second acceptor component in OPVs composed of PM6:DIBP3F-Se:BTP-J17 (refer to our recent work on dimeric acceptor DIBP3F-Se). The BTP-J17 is very miscible with the DIBP3F-Se and appears to diffuse into the host donor-acceptor interface. The ensuing ternary cells exhibit enhanced exciton dissociation, improved carrier mobility, and more efficient charge extraction. Optimised OPVs based on PM6:DIBP3F-Se:BTP-J17 show enhanced open-circuit voltage (VOC) while maintaining the high short-circuit current (JSC) from the binary blends, boosting the power conversion efficiency (PCE) from 18.40 % to 19.60 %. By integrating MgF2 as an antireflection coating and n-doping the ternary BHJ with ethyl viologen (EV), we were able to further boost the PCE to 20.5 % (uncertified) and simultaneously extended the outdoor stability to seven weeks. Our findings highlight the crucial role of asymmetric SMA as an additional component for boosting the performance and stability of OPVs.
ISSN:0927796X
DOI:10.1016/j.mser.2024.100922