- Violet-blue-or pure-blue-emitting triphenylamine derivatives: Synthesis and properties
-
We report the synthesis and optoelectronic properties of a series of nine triphenylamine derivatives. They were synthesized by Suzuki cross-coupling reactions and characterized by elemental analysis, nuclear magnetic resonance, ultraviolet visible absorpt
- Wu, Zhi-Ping,Liu, Gui-Jun,Zhu, Cai-Cai,Li, Zhi-Mei,Gao, Xi-Cun,Cao, Qian-Yong
-
-
Read Online
- New D-D-π-A triphenylamine-coumarin sensitizers for dye-sensitized solar cells
-
Three D-D-π-A triphenylamine-coumarin sensitizers were designed and synthesized with a triphenylamine and coumarin double donor and a cyanoacrylic acid acceptor. Thiophene, bithiophene and phenylthiophene were used as π-bridges, respectively, and the effects of different π-bridges on the photophysical properties and photovoltaic performance were investigated. With the incorporation of an additional thiophene unit, the bithiophene π-bridge contributes to better light absorption and hence superior JSC compared with the thiophene π-bridge. Although the dye with phenylthiophene π-bridge exhibits an inferior absorption spectrum to that with the thiophene π-bridge, it gives a photoelectrical conversion efficiency of 4.99% and exhibits the best photovoltaic performance of the three sensitizers, ascribed to its efficient photon-to-current conversion efficiency, slow charge recombination rate and good electron injection efficiency.
- He, Ji,Liu, Yang,Gao, Jianrong,Han, Liang
-
-
Read Online
- Novel organic dyes with anchoring group of quinoxaline-2, 3-diol and the application in dye-sensitized solar cells
-
Two organic quinoxaline dyes (WQ-1 and WQ-2) with a structure of quinoxaline-2, 3-diol as the electron withdrawing and anchoring group were synthesized and applied in the dye-sensitized solar cells. Fourier transform infrared spectroscopy and two other re
- Wang, Lei,Yang, Xichuan,Wang, Xiuna,Sun, Licheng
-
p. 581 - 587
(2015/03/18)
-
- Synthesis of triphenylamine-modified arylates and ketones via suzuki coupling reactions
-
A series of triphenylamine-mdified arylates and ketones were synthesized via Pd-catalyzed Suzuki coupling reaction of triphenylamine boronic acid with aryl bromide. The triphenylamine boronic acid was synthesized by iodization of 4-bromoaniline, Ullmann reaction of 1-bromo-4-iodobenzene with diphenylamine, and boronic acidification of 4-bromotriphenylamine.
- Wang, Jian,Yang, Chang-Jian,Peng, Hua-Nan,Deng, Yang-Sheng,Gao, Xi-Cun
-
p. 832 - 840
(2011/04/22)
-
- Efficient and stable dye-sensitized solar cells based on phenothiazine sensitizers with thiophene units
-
Three new phenothiazine organic dyes containing thiophene, 3-(5-(3-(4-(bis(4-methoxy phenyl)amino)phenyl)-10-octyl-10H-phenothiazin-7-yl) thiophen-2-yl)-2-cyanoacrylic acid (P1), 3-(5-(3-(4-(diphenylamino)phenyl)-10- octyl-10H-phenothiazin-7-yl)thiophen-2-yl)-2-cyanoacrylic acid (P2) and 2-cyano-3-(5-(10-octyl-3-(4-(2,2-diphenylvinyl)phenyl)-10H-phenothiazin-7-yl) thiophen-2-yl) acrylic acid (P3) were designed and synthesized as sensitizers for application in dye-sensitized solar cells (DSSCs). For these dyes, the phenothiazine derivative moiety and the cyanoacetic acid take the roles of electron donor and electron acceptor, respectively. The absorption spectra, electrochemical and photovoltaic properties of P1-P3 and the cell long-term stability were extensively investigated. It was found that HOMO and LUMO energy level tuning can be conveniently accomplished by alternating the donor moiety. The DSSCs based on dye P2 showed the best photovoltaic performance: a maximum monochromatic incident photon-to-current conversion efficiency (IPCE) of 84.9%, a short-circuit photocurrent density (Jsc) of 10.84 mA cm -2, an open-circuit photovoltage (Voc) of 592 mV, and a fill factor (ff) of 0.69, corresponding to an overall conversion efficiency of 4.41% under standard global AM 1.5 solar light conditions. These results demonstrated that the DSSCs based on phenothiazine dyes could achieve both high performance and good stability.
- Wu, Wenjun,Yang, Jiabao,Hua, Jianli,Tang, Jin,Zhang, Lei,Long, Yitao,Tian, He
-
supporting information; experimental part
p. 1772 - 1779
(2010/08/19)
-