Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Materials Chemistry A: Materials for Energy and Sustainability called Incorporation of alkylthio side chains on benzothiadiazole-based non-fullerene acceptors enables high-performance organic solar cells with over 16% efficiency, Author is Cheung, Andy Man Hong; Yu, Han; Luo, Siwei; Wang, Zhen; Qi, Zhenyu; Zhou, Wentao; Arunagiri, Lingeswaran; Chang, Yuan; Yao, Huatong; Ade, Harald; Yan, He, which mentions a compound: 693-67-4, SMILESS is CCCCCCCCCCCBr, Molecular C11H23Br, Synthetic Route of C11H23Br.
Y6-type non-fullerene acceptors (NFAs) with an acceptor-donor-acceptor′-donor-acceptor (A-D-A′-D-A) structure have been very popular in the field of organic solar cells (OSCs) due to their excellent performances. In this study, two novel NFAs, BTPS-4F and BTPS-4Cl were designed by incorporating undecylthio side chains into a thienothiophene moiety and connecting it to two different halogenated 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile end groups (2F-IC and 2Cl-IC) resp. When blended with a donor polymer, PM6, BTPS-4F-based devices achieved a high power conversion efficiency (PCE) of up to 16.2% with an open-circuit voltage (VOC) of 0.82 V, a short-circuit c.d. (JSC) of 25.2 mA cm-2 and a fill factor (FF) of 0.78, while BTPS-4Cl-based devices achieved an inferior PCE of 13.5%. This is the first time alkylthio chains are employed on Y6-like NFAs to achieve high-performance OSCs. Subsequent characterization showed that the upshifted energy level of BTPS-4F and the better intermol. packing in PM6:BTPS-4F blends are the major reasons for the enhanced performance of BTPS-4F-based devices over BTPS-4Cl-based ones. This work provides high-performance non-fullerene acceptors for OSCs and demonstrates a promising mol. design strategy that can effectively regulate their energy levels and morphol.
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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem