Abstract:Inspired by the advantages of heteroatoms introducing and molecular structure symmetry-breaking in construction of nonfullerene acceptors (NFAs), in this contribution, we designed and synthesized three asymmetric perylene diimide (PDI) based acceptors by annulating a selenophene and/or fusing a thiophene ring at the bay position. Using commercially purchased PBDBÀ T as electron donor, a best power conversion efficiency (PCE) of 5.32 % was achieved for selenophene-annulated PDI (PDI2À Se), while higher PCE of 6… Show more
“…[60][61][62][63] Most asymmetric NFAs are derived from the state-of-the-art ITIC and Y6 with an acceptor-donor-acceptor configuration, 64,65 and only a few asymmetric PDI-based NFAs have been reported. 37,56,[66][67][68][69][70][71][72][73][74][75] Moreover, most of the asymmetrical PDI acceptors were achieved by the incorporation of a different functional group at the bay position. Breaking the molecular symmetry of PDI at the N position in the imide group is rarely reported.…”
Section: Introductionmentioning
confidence: 99%
“…1), have emerged as field-favorite building blocks in constructing nonfullerene acceptors (NFAs). 32–56 Besides the nonplanar molecular configurations, the molecular symmetry of the NFAs plays an indispensable role in the determination of photovoltaic performance. 57 Research on asymmetric NFAs has been relatively overlooked even though its development could be traced back to 2010.…”
The vinylene-bridged helical perylene diimide dimer (PDI2) and derivatives have received considerable attention for application in nonfullerene organic solar cells (OSCs). Benefit from the large natural dipole moment and the...
“…[60][61][62][63] Most asymmetric NFAs are derived from the state-of-the-art ITIC and Y6 with an acceptor-donor-acceptor configuration, 64,65 and only a few asymmetric PDI-based NFAs have been reported. 37,56,[66][67][68][69][70][71][72][73][74][75] Moreover, most of the asymmetrical PDI acceptors were achieved by the incorporation of a different functional group at the bay position. Breaking the molecular symmetry of PDI at the N position in the imide group is rarely reported.…”
Section: Introductionmentioning
confidence: 99%
“…1), have emerged as field-favorite building blocks in constructing nonfullerene acceptors (NFAs). 32–56 Besides the nonplanar molecular configurations, the molecular symmetry of the NFAs plays an indispensable role in the determination of photovoltaic performance. 57 Research on asymmetric NFAs has been relatively overlooked even though its development could be traced back to 2010.…”
The vinylene-bridged helical perylene diimide dimer (PDI2) and derivatives have received considerable attention for application in nonfullerene organic solar cells (OSCs). Benefit from the large natural dipole moment and the...
Asymmetric perylene diimide (PDI)-based dimeric electron acceptors have gained the relatively little attention. Herein, two asymmetric fused PDI dimers, namely PDI-TPDI and PDI-SePDI, linked with one single bond (σ bond),...
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