芴
轨道能级差
吸收(声学)
循环伏安法
电化学
接受者
分析化学(期刊)
带隙
材料科学
吸收光谱法
分子
化学
物理化学
光学
聚合物
有机化学
电极
物理
光电子学
复合材料
凝聚态物理
作者
Jayathirtha Rao Vaidya,Ejjurothu Appalanaidu,Manohar Reddy Busireddy,Belum V. S. Reddy
标识
DOI:10.56042/ijcb.v59i3.27697
摘要
We have designed A-D-π-D-A type three new small molecular donor materials denoted as FD-IND, FD-DCV andFD-NBR, which have been synthesised and their photo-physical, electrochemical and thermal properties explored.The synthesised materials have fluorene as “π-spacer,” dithieonopyrrole as “Donor” (D) and various “Acceptor” (A) unitsare 1,3-indanedione (IND), dicyanovinylene (DCV) and N-butyl rhodanine (NBR). All these three materials have goodsolubility (~30 mg/mL) in most common organic solvents and have relatively broad absorption in the visible regioncovering the range of 300-650 nm with two primary absorption bands. The absorption bands located at shorter wavelengthregion are ascribed to a localized aromatic π-π* transition of the A-D-π-D-A system, while the bands at longer wavelengthare mainly attributed to an ICT transition. All the compounds exhibit excellent thermal stabilities in the range of 260-373°C.Cyclic voltammetry data provided HOMO values as −5.26, −5.32 and −5.32 eV for FD-NBR, FD-DCV and FD-INDrespectively. LUMO values estimated from HOMO values and optical band gap are −3.27, −3.22 and −3.37 eV forFD-NBR, FD-DCV and FD-IND respectively. Therefore, these are potential molecules for organic solar cells.
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