Abstract
AbstractThe past three years have witnessed rapid growth in the field of organic solar cells (OSCs) based on non‐fullerene acceptors (NFAs), with intensive efforts being devoted to material development, device engineering, and understanding of device physics. The power conversion efficiency of single‐junction OSCs has now reached high values of over 18%. The boost in efficiency results from a combination of promising features in NFA OSCs, including efficient charge generation, good charge transport, and small voltage losses. In addition to efficiency, stability, which is another critical parameter for the commercialization of NFA OSCs, has also been investigated. This review summarizes recent advances in the field, highlights approaches for enhancing the efficiency and stability of NFA OSCs, and discusses possible strategies for further advances of NFA OSCs.
Highlights
Along with the rapid development of materials and devices, the fundamental understanding of OSCs is moving forward, It has been more than 30 years since the first solar cell based though at a slower pace compared with that of material developon organic heterojunctions was reported by C
A critical factor that affects the performance of a given donor/ acceptor (D/A) system is the morphology of the active layer, which is strongly dependent on the molecular properties, film processing, device configuration, etc
We summarize these emerging approaches for enhancing the efficiency and stability of non-fullerene acceptors (NFAs) OSCs, and highlight some aspects that might need further attention for further breakthroughs: I
Summary
Along with the rapid development of materials and devices, the fundamental understanding of OSCs is moving forward, It has been more than 30 years since the first solar cell based though at a slower pace compared with that of material developon organic heterojunctions was reported by C. One of the greatest impediments to Different acceptors, including fullerene derivatives,[2,3,4] semicon- developing a fundamental understanding of OSCs lies in the bulk ducting polymers,[5,6,7,8,9,10,11,12,13] inorganic nanocrystals,[14,15,16,17,18] and more heterojunction (BHJ) structure. Synthetic flexibility, fused-ring non-fullerene acceptors (NFAs) Together with these advantages, the BHJ structure presents have been developing rapidly since 2015, enabling high power challenges. At the end of this review, we provide an outlook on the advantages of non-fullerene OSCs, along with opportunities for improvements, and suggest design strategies for highly efficient and stable OSCs for commercially viable photovoltaics.
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