![]() ![]() Further development of nonfused NFAs will be very fruitful by employing appropriate building blocks and via side-chain optimizations. These results demonstrate the potential of A-D- A'-D-A type nonfused NFAs for high-performance OSCs. Moreover, a decent power conversion efficiency of 9.3 and 10.5% has been achieved by BTCIC and BTCIC-4Cl, respectively, by blending them with an appropriate polymer donor. The optical properties, energy levels, and molecular crystallinities were finely tuned by changing the more ยป terminal groups. In this work, we report two nonfused NFAs, BTCIC and BTCIC-4Cl, based on an A-D-A'-D-A architecture, which possess the same electron-deficient benzothiadiazole central core but different electron-withdrawing terminal groups. ![]() An alternative strategy is to develop nonfused NFAs, which possess synthetic simplicity and facile tunability in optoelectronic properties and solid-state microstructures. However, most NFAs feature a large fused-ring backbone, which usually requires a tedious multiple-step synthesis, and are not applicable to commercial applications. Nonfullerene acceptors (NFAs) have contributed significantly to the progress of organic solar cells (OSCs). (ANL), Argonne, IL (United States) Sponsoring Org.: USDOE Office of Science (SC), Basic Energy Sciences (BES) OSTI Identifier: 1635203 Grant/Contract Number: AC02-06CH11357 Resource Type: Accepted Manuscript Journal Name: ACS Energy Letters Additional Journal Information: Journal Volume: 5 Journal Issue: 6 Journal ID: ISSN 2380-8195 Publisher: American Chemical Society (ACS) Country of Publication: United States Language: English Subject: 14 SOLAR = , Publication Date: Research Org.: Argonne National Lab. Department of Chemistry, Center for Light Energy-Activated Redox Processes, and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.Department of Chemistry, Center for Light Energy-Activated Redox Processes, and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States Flexterra Corporation, 8025 Lamon Avenue, Skokie, Illinois 60077, United States.Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States.of Standards and Technology (NIST), Gaithersburg, MD (United States) Northwestern Univ., Evanston, IL (United States). ![]()
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