885503-13-9Relevant articles and documents
Two methoxyaniline-substituted dibenzofuran derivatives as hole-transport materials for perovskite solar cells
Shi, Yantao,Hou, Kaili,Wang, Yanxiang,Wang, Kai,Ren, HuiCai,Pang, MaoYin,Chen, Fan,Zhang, Sen
, p. 5415 - 5422 (2016)
2,2′,7,7′-Tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD), one of the classical organic photoelectric materials, has been widely used as a hole transport material (HTM) in perovskite solar cells (PSCs) due to its relatively higher conductivity, easier film formation, weak absorption in the visible region, etc. However, the complex synthesis process and the high synthesis cost of Spiro-OMeTAD severely limit the commercialization of this material. In this work, two economical methoxyaniline-substituted dibenzofuran derivatives, BF-002 and BF-003, are synthesized and successfully used as hole-transport materials in perovskite solar cells (PSCs). The important properties including light absorption, thermal stability, energy level, conductivity, as well as photovoltaic performance are systematically demonstrated. The highest power conversion efficiencies of the PSCs based on BF-002 and BF-003 are 14.20% and 14.07%, respectively, comparable to that of the PSCs based on Spiro-OMeTAD.
A two-benzofuran derivative and its preparation method and application
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, (2017/08/25)
The invention relates to a derivative of dibenzofuran and a preparation method and application thereof. The preparation method of the derivative of the dibenzofuran comprises the steps that carbon-nitrogen coupling is performed on p-bromoanisole and p-methoxyaniline to obtain a first precursor; a two-step reaction is performed on the first precursor and 4,4'-dibromodiphenylamine protected by butyloxycarbonyl to obtain a second precursor, and a two-step reaction is performed on the first precursor and 3,6-dibromocarbazole protected by butyloxycarbonyl to obtain a third precursor; carbon-nitrogen coupling is performed on all the precursors and 2,8-dibromodibenzofuran under the action of a palladium catalyst to obtain the derivative of the dibenzofuran. The prepared derivative of the dibenzofuran is easy to synthesize, low in cost, high in glass transition temperature and good in heat stability, is a hole-transport material with the good properties and has the good effect when the derivative is applied to perovskite solar cells.
Photoinduced electron transfer in rhenium(I)-oligotriarylamine molecules
Bonn, Annabell G.,Neuburger, Markus,Wenger, Oliver S.
, p. 11075 - 11085 (2015/01/09)
Two molecular triads with an oligotriarylamine multielectron donor were synthesized and investigated with a view to obtaining charge-separated states in which the oligotriarylamine is oxidized 2-fold. Such photoinduced accumulation of multiple redox equivalents is of interest for artificial photosynthesis. The first triad was comprised of the oligotriarylamine and two rhenium(I) tricarbonyl diimine photosensitizers each of which can potentially accept one electron. In the second triad the oligotriarylamine was connected to anthraquinone, in principle an acceptor of two electrons, via a rhenium(I) tricarbonyl diimine unit. With nanosecond transient absorption spectroscopy (using an ordinary pump-probe technique) no evidence for the generation of 2-fold oxidized oligotriarylamine or 2-fold reduced anthraquinone was found. The key factors limiting the photochemistry of the new triads to simple charge separation of one electron and one hole are discussed, and the insights gained from this study are useful for further research in the area of charge accumulation in purely molecular (nanoparticle-free) systems. An important problem of the rhenium-based systems considered here is the short wavelength required for photoexcitation. In the second triad, photogenerated anthraquinone monoanion is protonated by organic acids, and the resulting semiquinone species leads to an increase in lifetime of the charge-separated state by about an order of magnitude. This shows that the proton-coupled electron transfer chemistry of quinones could be bene ficial for photoinduced charge accumulation. (Chemical Equation Presented).
