Xiaoming Feng

Xiangtan University, Siangtan, Hunan, China

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Publications (5)22.59 Total impact

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    ABSTRACT: Three donor–(π-spacer)–acceptor porphyrin dyes were synthesized for use in dye-sensitized solar cells. The dyes comprised the same donor (porphyrin derivative) and acceptor/anchoring group (2-cyanoacrylic acid) but varying π-spacer consisting of a combination of 4-methylthiophene, 4-hexylthiophene or 3,4-ethylenedioxythiophene groups. The dyes displayed different adsorption behavior and coverage of the TiO2 surface.
    Dyes and Pigments 01/2011; 88(1-88):75-83. DOI:10.1016/j.dyepig.2010.05.003 · 3.97 Impact Factor
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    ABSTRACT: Three donor–acceptor, π-conjugated (D–π–A) dyes containing methylthiophene or vinylene methylthiophene as π-conjugated spacer were utilised in dye-sensitized nanocrystalline TiO2 solar cells. The relationship between the structure of the dyes and their photophysical, electrochemical and photovoltaic properties was investigated systematically. The vinyl unit, introduced as the π-conjugated spacer, leads to unfavorable back-electron transfer and decrease of the open-circuit voltage. A dye-sensitized solar cell based on 2-cyano-3-(5-(4-(diphenylamino)phenyl)-4-methylthiophenyl-2-yl) acrylic acid displayed the most efficient solar-to-electricity conversion efficiency of the dyes with a maximum η value of 8.27% (Voc = 0.72 V, Jsc = 15.76 mA cm−2, FF = 0.73) under simulated AM 1.5 G solar irradiation (100 mW cm−2).
    Dyes and Pigments 11/2010; 87(3-87):181-187. DOI:10.1016/j.dyepig.2010.03.029 · 3.97 Impact Factor
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    ABSTRACT: A new type of stainless steel mesh-based flexible quasi-solid dye-sensitized solar cell (DSSC) was designed and fabricated by using electrospun TiO2 nanofibers web as a light scattering layer and stainless steel foil coated with polypyrrole (PPy) nanoparticles as counter electrode. The photovoltaic performance measurements showed that electrospun TiO2 nanofibers web was propitious to light harvesting ability and energy conversion efficiency. Cyclic voltammogram measurement revealed that PPy electrode possessed smaller charge-transfer resistance and higher electrocatalytic activity for the I2/I− redox reaction than that of Pt electrode. A overall energy conversion efficiency (η) of 2.36% was obtained based on a DSSC with N719 dye as sensitizer and PPy nanoparticles coated on the stainless steel foil as counter electrode, which attained 84% of the η value (2.80%) of the quasi-solid DSSC with Pt foil as counter electrode.
    Solar Energy Materials and Solar Cells 06/2010; 94(6):1005–1010. DOI:10.1016/j.solmat.2010.02.005 · 5.34 Impact Factor
  • Yijiang Liu · Na Xiang · Xiaoming Feng · Ping Shen · Weiping Zhou · Chao Weng · Bin Zhao · Songting Tan ·
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    ABSTRACT: Three novel organic dyes based on porphyrin derivatives were designed and synthesized for dye-sensitized solar cells, resulting in a maximum power conversion efficiency (eta) of 5.14% and a maximum IPCE value of 72% for a cell based on the dye.
    Chemical Communications 06/2009; DOI:10.1039/b821985k · 6.83 Impact Factor
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    Songting Tan · Xiaoming Feng · Bin Zhao · Yingping Zou · Xianwei Huang ·
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    ABSTRACT: This communication explores a facile approach for fabricating nanofibers containing luminescent conjugated polymer, poly(2-methoxy-5-octoxy)-1,4-phenylene vinylene)-alt-1,4-(phenylene vinylene) (PMO-PPV), and rare earth complex, Eu(ODBM)3phen (ODBM: 4-n-Octyloxydibenzoylmethanato; phen: 1,10-phenanthroline) via an electrospinning technique. The morphology and photoluminescent properties of the electrospun fibers were characterized by scanning electron microscopy, fluorescence spectrophotometer and UV optical microscopy. The electrospun fibers with diameters ranging from 70 nm to 200 nm as well as parallel orientation show strong green and red photoluminescence. This is the first but important approach towards novel applications of luminescent conjugated polymers and rare earth complex nanofibers. This kind of eletrospun nanofiber is a promising candidate for optical and electrical nanomaterials.
    Materials Letters 06/2008; 62(16):2419-2421. DOI:10.1016/j.matlet.2007.12.036 · 2.49 Impact Factor