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RISS 인기검색어
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- 저자 : SONGYUAN DAI (검색결과 2 건)
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YONG DING,SONGYUAN DAI,Litao Jia,YANMEI MA,ZHAOQIAN LI,CHANGNENG ZHANG,JIANXI YAO,LIE MO,LINHUA HU,BING ZHANG,LING JIANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.5
The sub-microspheres play multiple roles in enhancing dye adsorption and light-scattering toimprove the performance of dye-sensitized solar cells (DSSCs). In this work, the well-de¯ned TiO 2sub-microspheres with anatase granular-like nanocrystals are prepared in high yield by com-bining hydrolytic process with solvothermal treatment. Scanning electron microscopy (SEM) andtransmission electron microscopy (TEM) results indicated that plenty of rhombic nanoparticleswith ? 18 nm diameter having mutual contacts to neighboring nanoparticles were densely self-assembled into sub-microspheres, and abundant mesopores existed in the whole sub-microsphereswith superior light scattering ability. The appropriate pore diameter and relatively high speci¯csurface area of the as-obtained sub-microsphere result in a higher dye adsorption. As expected, byusing the sub-microspheres as a scattering layer, a higher photovoltaic conversion e±ciency of10.15% is obtained for DSSCs.
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WANGPING RAO,JIANXI YAO,SONGYUAN DAI,BING ZHANG,YONGZHE ZHANG,LI XIAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.5
We demonstrate a strategy for incorporating plasmon resonant metallic nanoparticles in theconstruction of the three-dimensional (3D) interwoven structured TiO 2 photoanodes. The 3Dinterwoven structure contained continuous TiO 2 skeleton and numerous interconnected macro/mesopores, which supplied e®ective straight path for electron transfer and high speci¯c surfacearea for dye load. Localized surface plasmon resonance (SPR) was produced by the addition ofgold nanoparticles (AuNPs), which increased the light absorption of the photoanodes moree®ectively. The synergistic e®ect of SPR with constructed TiO 2 nanostructures has been in-vestigated, and was con¯rmed by ¯eld-emission scanning electron microscope (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy(XPS), UV-Vis absorption spectra, J – V characteristics, and electrochemical impedance spec-troscopy (EIS) analysis. It was found that the range and strength of light absorption of TiO 2photoanodes, the photon capture ability of the dye molecules, the photoelectric conversion e±-ciency were signi¯cantly increased while the electron transfer resistance decreased due to theincorporation of AuNPs compared to the P25 and Au-free photoanode. The related photoelectricperformance enhancement mechanisms, and surface-plasmon resonances in dye-sensitized solarcells (DSSCs) with Au nanostructures were analyzed and discussed.
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