Ternary Polymer Solar Cells with High Open Circuit Voltage containing Fullerene and New Thieno[3',2',6,7][1]Benzothieno[3,2‐b]Thieno[3,2‐g][1]Benzothiophene‐based Non‐fullerene Small Molecule Acceptor

Keshtov, M.L.; Konstantinov, I.O.; Kuklin, S.A.; Khokhlov, A.R.; Ostapov, I.E.; Peregudov, A.S.; Buzin, M.I.; Dou, C.; Dahiya, H.; Sharma, G.D.

Авторы: Keshtov Muhammed L., Konstantinov Igor O., Kuklin Sergei A., Khokhlov Alexsei R., Ostapov Ilya E., Peregudov Aleksander S., Buzin Mikhail I., Dou Chuandong, Dahiya Hemraj, Sharma Ganesh D.
Журнал: ENERGY TECHNOLOGY
Год издания: 2021
Первая страница: 2001100
Последняя страница: 2001100
DOI: 10.1002/ente.202001100
Аннотация: Herein, the synthesis of a new medium bandgap nonfullerene acceptor DBTBT‐IC consisting of di‐benzothieno [3,2‐b][1]‐benzothiophene DBTBT as the central donor unit and IC as terminal acceptor units and its use as the acceptor for the fabrication of single binary and ternary polymer solar cells is reported. DBTBT‐IC exhibits a medium optical bandgap of about 1.65 eV. When paired with the wide bandgap‐conjugated polymer PDTNIT as donor, the polymer solar cells based on the optimized PDTNIT:DBTBT‐IC active layer realized a power conversion efficiency of 12.34% (short‐circuit current = 8.06 mA cm−2, open‐circuit voltage = 1.12 V, and fill factor (FF) = 0.62) which is higher than that for the PDTNIT:PC71BM counterpart, i.e., 9.08 % (short‐circuit current=14.58 mA cm−2, open‐circuit voltage = 0.93 V, and FF = 0.67). When a small amount of PC71BM was introduced into the host PDTNIT:DBTBT‐IC binary layer, the polymer solar cell based on the optimized PDTNIT:PC71BM:DBTBT‐IC (1:0.3:0.9) ternary active layer attained an excellent power conversion efficiency of about 15.92 %, mainly due to the increase in short‐circuit current and FF. The increase in the short‐circuit current may be associated with the broader absorption profile of the ternary active layer as compared with the binary counterparts and more efficient exciton utilization, due the partial energy transfer from PC71BM to DBTBT‐IC.
Добавил в систему: Куклин Сергей Александрович

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Ternary Polymer Solar Cells with High Open Circuit Voltage containing Fullerene and New Thieno[3',2',6,7][1]Benzothieno[3,2‐b]Thieno[3,2‐g][1]Benzothiophene‐based Non‐fullerene Small Molecule Acceptorстатья

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