Designs and understanding of small molecule-based non-fullerene acceptors for realizing commercially viable organic photovoltaics

Organic photovoltaics (OPVs) have emerged as a promising next-generation technology with great potential for portable, wearable, and transparent photovoltaic applications. Over the past few decades, remarkable advances have been made in non-fullerene acceptor (NFA)-based OPVs, with their power conve...

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Published inChemical science (Cambridge) Vol. 12; no. 42; pp. 144 - 1423
Main Authors Kim, Minjun, Ryu, Seung Un, Park, Sang Ah, Pu, Yong-Jin, Park, Taiho
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 03.11.2021
The Royal Society of Chemistry
Subjects
Chemistry
Commercialization
Energy conversion efficiency
Fullerenes
Photoelectric effect
Photovoltaic cells
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Summary:Organic photovoltaics (OPVs) have emerged as a promising next-generation technology with great potential for portable, wearable, and transparent photovoltaic applications. Over the past few decades, remarkable advances have been made in non-fullerene acceptor (NFA)-based OPVs, with their power conversion efficiency exceeding 18%, which is close to the requirements for commercial realization. Novel molecular NFA designs have emerged and evolved in the progress of understanding the physical features of NFA-based OPVs in relation to their high performance, while there is room for further improvement. In this review, the molecular design of representative NFAs is described, and their blend characteristics are assessed via statistical comparisons. Meanwhile, the current understanding of photocurrent generation is reviewed along with the significant physical features observed in high-performance NFA-based OPVs, while the challenging issues and the strategic perspectives for the commercialization of OPV technology are also discussed. This review describes the current understandings and the significant features observed in NFA-based OPVs, with a particular focus on photophysical, electrical, and morphological characteristics.
Bibliography:Taiho Park is a Namgo endowed chair professor of POSTECH. He received his Ph.D. degree from the University of Cambridge, UK, under the supervision of Prof. Andrew B. Holmes in 2003, and then worked as a post-doctoral researcher under Prof. Steven C. Zimmerman at the University of Illinois (Urbana-Champaign), USA. He joined the faculty in the Department of Chemical Engineering at POSTECH in March of 2007. His current research interests include the material properties and device functions of optoelectronic devices.
Minjun Kim is a post-doctoral researcher in RIKEN, CEMS, Japan, under the supervision of Dr Yong-Jin Pu since 2019. He received his Ph.D. degree from the Department of Chemical Engineering at POSTECH, South Korea, in 2019, under the supervision of Prof. Taiho Park. His current research interests are the development of organic-based electronic materials and the photophysics of optoelectronic materials.
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ISSN:2041-6520
2041-6539
DOI:10.1039/d1sc03908c