Organic Photovoltaics Utilizing Small-Molecule Donors and Y-Series Nonfullerene Acceptors

Jinfeng Ge; Lin Xie; Ruixiang Peng; Ziyi Ge

doi:10.1002/adma.202206566

Organic Photovoltaics Utilizing Small-Molecule Donors and Y-Series Nonfullerene Acceptors

Adv Mater. 2023 May;35(20):e2206566. doi: 10.1002/adma.202206566. Epub 2023 Mar 27.

Authors

Jinfeng Ge^{1

2}, Lin Xie¹, Ruixiang Peng^{1

2}, Ziyi Ge^{1

2}

Affiliations

¹ Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China.
² Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.

PMID: 36482012
DOI: 10.1002/adma.202206566

Abstract

The emerging Y-series nonfullerene acceptors (Y-NFA) has prompted the rapid progress of power conversion efficiency (PCE) of all-small-molecule organic solar cells (ASM-OSCs) from around 12% to 17%. The excellent PCE improvement benefits from not only the outstanding properties of Y-series acceptors but also the successful development of small-molecule donors. The short-circuit current density, fill factor, and nonradiative recombination are all optimized to the unprecedented values, providing a scenery that is obviously different from the ITIC-series based ASM-OSCs. In this review, OSCs utilizing small-molecule donors and Y-NFA are summarized and classified in order to provide an up-to-date development overview and give an insight on structure-property correlation. Then, the characteristics of bulk-heterojunction (BHJ) formation of ASM-OSCs are discussed and compared with that of polymer-based OSCs. Finally, the challenges and outlook on designing ground-breaking small-molecule donor and forming an ideal BHJ morphology are discussed.

Keywords: all-small-molecule organic solar cells; nonfullerene acceptors.

Publication types

Review

Abstract

Publication types

Grants and funding