D?A?D low band gap molecule containing triphenylamine and benzoxadiazole/benzothiadiazole units: Synthesis and photophysical properties
摘要:
Two D-A-D-type low band gap organic dyes based on triphenylamine and benzoxadiazole/benzothiadiazole, 4,7-Bis{5-{4-{2-[4-(N,N-diphenylamino)phenyl]-1-nitrilethenyl}phenyl}-2-thienyl}-2,1,3-benzoxadiazole (BDNTBX) and 4,7-Bis{5-{4-{2-[4-(N,N-diphenylamino)phenyl]-1-nitrilethenyl}phenyl}-2-thienyl}-2,1,3-benzothiadiazole (BDNTBT) were successfully synthesized. The properties of two compounds were investigated by density functional theory (DFT) calculations, UV-vis absorption spectroscopy, cyclic voltammetry and fluorescence quenching experiment. The calculated ground-state geometries demonstrate intramolecular charge transfer (ICE) occurs in both molecules during the procedure of charge excitation from HOMO to LUMO. From the data in electrochemistry and fluorescence quenching experiments, the molecules reveal lower HOMO energy levels compared with that of P3HT and proper LUMO energy levels to obtain efficient charge separation with PCBM. Two synthesized compounds exhibit broad absorption range covering the whole visible spectral region. These photophysical and electrochemical properties call attention to that our materials are prospective candidates as donor materials for solution-processable organic photovoltaic cells. (C) 2012 Elsevier Ltd. All rights reserved.
D?A?D low band gap molecule containing triphenylamine and benzoxadiazole/benzothiadiazole units: Synthesis and photophysical properties
摘要:
Two D-A-D-type low band gap organic dyes based on triphenylamine and benzoxadiazole/benzothiadiazole, 4,7-Bis{5-{4-{2-[4-(N,N-diphenylamino)phenyl]-1-nitrilethenyl}phenyl}-2-thienyl}-2,1,3-benzoxadiazole (BDNTBX) and 4,7-Bis{5-{4-{2-[4-(N,N-diphenylamino)phenyl]-1-nitrilethenyl}phenyl}-2-thienyl}-2,1,3-benzothiadiazole (BDNTBT) were successfully synthesized. The properties of two compounds were investigated by density functional theory (DFT) calculations, UV-vis absorption spectroscopy, cyclic voltammetry and fluorescence quenching experiment. The calculated ground-state geometries demonstrate intramolecular charge transfer (ICE) occurs in both molecules during the procedure of charge excitation from HOMO to LUMO. From the data in electrochemistry and fluorescence quenching experiments, the molecules reveal lower HOMO energy levels compared with that of P3HT and proper LUMO energy levels to obtain efficient charge separation with PCBM. Two synthesized compounds exhibit broad absorption range covering the whole visible spectral region. These photophysical and electrochemical properties call attention to that our materials are prospective candidates as donor materials for solution-processable organic photovoltaic cells. (C) 2012 Elsevier Ltd. All rights reserved.
Structural Design Principle of Small-Molecule Organic Semiconductors for Metal-Free, Visible-Light-Promoted Photocatalysis
作者:Lei Wang、Wei Huang、Run Li、Dominik Gehrig、Paul W. M. Blom、Katharina Landfester、Kai A. I. Zhang
DOI:10.1002/anie.201603789
日期:2016.8.8
on the structural design principle of small‐molecule organic semiconductors as metal‐free, pure organic and visiblelight‐active photocatalysts. Two series of electron‐donor and acceptor‐type organic semiconductor molecules were synthesized to meet crucial requirements, such as 1) absorption range in the visible region, 2) sufficient photoredox potential, and 3) long lifetime of photogenerated excitons
Effects of including electron-withdrawing atoms on the physical and photovoltaic properties of indacenodithieno[3,2-b]thiophene-based donor–acceptor polymers: towards an acceptor design for efficient polymer solar cells
作者:Ping Cai、Xiaofeng Xu、Jiangman Sun、Junwu Chen、Yong Cao
DOI:10.1039/c7ra01049d
日期:——
Three new D–A polymers using indacenodithieno[3,2-b]thiophene (IDTT) as an electron-rich unit and benzoxadiazole (BO), benzodiathiazole (BT) or difluorobenzothiadiazole (FBT) as an electron-deficient unit were synthesized and applied in solar cells.
Benzochalcogendiazole-based conjugated molecules: investigating the effects of substituents and heteroatom juggling
作者:Heta A. Patel、Viraj J. Bhanvadia、Hemant M. Mande、Sanjio S. Zade、Arun L. Patel
DOI:10.1039/c9ob01762c
日期:——
photophysical properties of the synthesized benzochalcogendiazole-based small molecules, having different terminal substituents, have been compared. Moreover, the structural aspects, including the packing patterns and non-bonding interactions of the conjugated molecules, have been investigated using the single crystal X-ray diffraction (SCXRD) technique.
Synthesis, photophysical, electrochemical and single-crystal x-ray diffraction study of (<i>Z</i>)-2-phenyl-3-(5-(4-(thiophen-2-yl)benzo[c][1,2,5]thiadiazol-7-yl)thiophen-2-yl)acrylonitrile
作者:Viraj J. Bhanvadia、Heta A. Patel、Neha N. Sharma、Arun L. Patel
DOI:10.1080/00397911.2016.1185125
日期:2016.6.17
properties, thermogravimetric stability and single-crystalX-raydiffractionstudy of (Z)-2-phenyl-3-(5-(4-(thiophen-2-yl)benzo[c][1,2,5]thiadiazol-7-yl)thiophen-2-yl)acrylonitrile are examined using ultraviolet–visible spectrophotometry, cyclic voltammetry, thermal gravimetric analysis–diffraction scanning calorimetry analysis, single-crystalX-raydiffraction and density functional theory calculations
POLYMERS OF 8,9-DIHYDROBENZO[DEF]CARBAZOLE AND THEIR USE AS ORGANIC SEMICONDUCTORS
申请人:Blouin Nicolas
公开号:US20130001476A1
公开(公告)日:2013-01-03
The invention relates to novel polymers containing 8,9-dihydrobenzo[def]carbazole units, methods and materials for their preparation, their use as semiconductors in organic electronic (OE) devices, and to OE devices comprising these polymers.