Thiophene-Perylenediimide Bridged Dimeric Porphyrin Donors Based on the Donor-Acceptor-Donor Structure for Organic Photovoltaics was written by Piradi, Venkatesh;Gao, Yaxin;Yan, Feng;Imran, Muhammad;Zhao, Jianzhang;Zhu, Xunjin;So, Shu Kong. And the article was included in ACS Applied Energy Materials in 2022.COA of Formula: C4H4BrNO2 This article mentions the following:
Two D-A-D (D = donor, A = acceptor)-based small-mol. donors, TPDI-2P and F-TPDI-2P, are designed and synthesized for organic solar cells (OSCs), with two strong donor porphyrin units bridged by either an electron-deficient diethynyl-substituted thiophene-perylenediimide (TPDI) linker for the former or a diethynyl-fused TPDI linker for the latter; 3-ethylrhodanine units were then flanked sym. by phenylenethynylene π-linkers. Both compounds show strong absorption profiles from 400 to 800 nm, with a valley at 600 nm, attributed to the Soret and Q-bands of porphyrin units. Compared to TPDI-2P, F-TPDI-2P with a fused TPDI backbone exhibits high red shifted absorptions and low-lying energy levels due to increased coplanarity of the dimeric porphyrin units. As a result, the optimized photovoltaic device based on F-TPDI-2P/PC71BM has a decent power conversion efficiency (PCE) of 8.21%, whereas the device TPDI-2P/PC71BM has a slightly lower PCE (6.90%). The higher efficiency of F-TPDI-2P/PC71BM is mainly due to better photocurrent generation and smoother surface morphol. with elevated charge carrier mobilities. The success of this mol. design strategy could be beneficial in the development of more efficient porphyrin-based donors for high-performance OSCs. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5COA of Formula: C4H4BrNO2).
1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. COA of Formula: C4H4BrNO2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary