121602-03-7Relevant articles and documents
Effect of Thiophene Spacer Position in Carbazole-Based Dye-Sensitized Solar Cells on Photophysical, Electrochemical and Photovoltaic Properties
Samae, Ruslan,Surawatanawong, Panida,Eiamprasert, Utt,Pramjit, Songyos,Saengdee, Laksana,Tangboriboonrat, Pramuan,Kiatisevi, Supavadee
, p. 3536 - 3549 (2016)
The synthesis, photophysical and electrochemical properties, and photovoltaic performances in dye-sensitized solar cells (DSSCs) of five new metal-free organic sensitizers with a carbazole moiety as the electron donor are reported. The compounds contain a thiophene at various positions and a cyanoacrylic acid unit as the electron acceptor. The position of the thiophene moiety affected both the photophysical and electrochemical properties, leading to conversion efficiencies of 1.44 to 4.57 % under AM 1.5 solar conditions (100 mW cm–2). The best performance and longest electron lifetime were found when a thiophene was located on both donor and acceptor sites. The DSSC showed a short-circuit current (Jsc) of 8.59 mA/cm2, an open-circuit photovoltage (Voc) of 0.75 V, and a fill factor (FF) of 0.71. The position of the π-conjugated bridges not only affects the absorption spectra and the energy levels of the sensitizers, but also adjusts the electron lifetime.
Development in synthesis and electrochemical properties of thienyl derivatives of carbazole
Cabaj, Joanna,Idzik, Krzysztof,So?oducho, Jadwiga,Chyla, Antoni
, p. 758 - 764 (2006)
A convenient and higher yielding synthetic route to N-alkyl-bis(thiophene)- and N-alkyl-bis(ethylenedioxythiophene) carbazole derivatives is reported and their aggregation, and electrochemical properties are characterized. The key step in the synthesis of this group of compounds has been the Stille-type coupling reaction between the N-alkyldibromocarbazole and tin derivatives of thiophene or ethylenedioxythiophene, as the best way for preparation of conjugated N-alkylcarbazole derivatives. For this group of compounds we also present an electrochemical polymerization effect.
Utilizing the heterocyclic effect towards high contrast ratios of mechanoresponsive luminescence based on aromatic aldehydes
Zhang, Fang,Liang, Xiaozhong,Li, Da,Yin, Xiangkai,Tian, Xia,Li, Bin,Xu, Hong,Guo, Kunpeng,Li, Jie
, p. 12328 - 12335 (2019)
A high contrast ratio is required by mechanoresponsive luminescent (MRL) materials to enable their adoption in mechanical sensors. However, the effective design principle remains restricted by the lack of understanding of the necessary features of such lu
A conjugated hyperbranched polymer constructed from carbazole and tetraphenylethylene moieties: Convenient synthesis through one-pot "a 2 + B4" Suzuki polymerization, aggregation-induced enhanced emission, and application as explosive chemosensors and PLEDs
Wu, Wenbo,Ye, Shanghui,Huang, Lijin,Xiao, Li,Fu, Yingjie,Huang, Qi,Yu, Gui,Liu, Yunqi,Qin, Jingui,Li, Qianqian,Li, Zhen
, p. 6374 - 6382 (2012)
In this paper, tetraphenylethylene (TPE) units, a well-known aggregation-induced emission (AIE) active group, are utilized to construct the hyperbranched polymer HP-TPE-Cz with carbazole moieties, a good hole-transporting and electroluminescent group, through an "A2 + B4" approach by using a one-pot Suzuki polycondensation reaction. For comparison, its analog linear polymer LP-TPE-Cz, also constructed from these two moieties, was prepared. These two polymers exhibit interesting aggregation-induced emission enhanced (AIEE) behavior and act as explosive chemosensors with high sensitivity both as nanoparticles and in solid state, due to the presence of TPE units. Also, the HP-TPE-Cz PLED device exhibited a remarkably enhanced current efficiency (2.13 cd A-1) and luminescence efficiency (5914 cd m-2), compared with its analog linear polymer LP-TPE-Cz (1.04 cd A-1, 1654 cd m-2). The Royal Society of Chemistry 2012.
Π-acceptor and donor-type compd. dye for dye-sensitized solar cell
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Paragraph 0043-0044, (2018/04/20)
PROBLEM TO BE SOLVED: To provide a donor-π-acceptor type compound capable of improving an adsorption amount to a metal oxide, and a dye for a dye-sensitized solar cell.SOLUTION: A donor-π-acceptor type compound has two acceptors in one molecule, the acceptors being one selected from the group consisting of a pyridine-containing group and a pyridinium ring-containing group which have adsorption ability to a metal oxide. The donor-π-acceptor type compound includes two donor-π-acceptor structures where a donor and π are conjugated and a π conjugate structure is not branched.
