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Efficient Ternary Polymer solar cells based ternary active layer consisting ofconjugated polymers and non-fullerene acceptors with power conversion efficiencyapproaching near to 15.5%статья Исследовательская статья
Дата последнего поиска статьи во внешних источниках: 4 июня 2021 г.
- Авторы: Sharma Ganesh D., Suthar Rakesh, Pestrikova A.A., Nikolaev A.Y., Chen F.C., Keshtov M.L.
- Журнал: Solar Energy
- Том: 217
- Год издания: 2021
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 1
- Последняя страница: 7
- DOI: 10.1016/j.solener.2021.01.027
- Аннотация: Ternary polymer solar cells employing two polymers (P2, PTB7-Th) and one non-fullerene small molecule acceptor(Y6) were constructed using a conventional structure. The PTB7-Th, P2 and Y6 exhibit complementaryabsorption spectra therefore, the ternary blend consists of these three can maximize the photon harvesting efficiencywhich is advantageous to boost of short circuit current density of polymer solar cell. After the optimizationof the weight ratios between the two donors and keeping constant the weight concentration of acceptor and followingsolvent vapor annealing in THF for 40 s, P2:PTB7-Th: Y6 (0.3:0.7:1.5) based polymer solar cells attainedthe power conversion efficiency of 15.46%, superior to that for polymer solar cells based on binary active layersi.e., P2:Y6 (12.62%) and PTB7-Th:Y6 (12.84%), respectively. The open-circuit voltage for the P2:PTB7-Th:Y6 isabout 0.88 V which is in between the values for P2:Y6 (0.94 V) and PTB7-Th:Y6 (0.85 V), consistent with thedifferent highest occupied molecular orbital energy level for P2 (−5.38 eV) and PTB7-Th (−5.27 eV). The enhancementin the short circuit current may be associated with the broader absorption profile of the ternary activelayer relative to binary counterparts while the enhanced value of fill factor may be originated from the balancedcharge transport, suppressed recombination, and faster charge extraction.
- Добавил в систему: Николаев Александр Юрьевич
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