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TiO2 Nanoparticles Produced by Electric-Discharge-Nanofluid-Process as Photoelectrode of DSSC
Sih-li Chen,Hung-ting Su,Ho Chang,Ching-song Jwo,Hsiao Ju Feng
Author NameAffiliationE-mail
Sih-li Chen Department of Mechanical Engineering, National Taiwan University, Taipei 10617  
Hung-ting Su Department of Mechanical Engineering, National Taiwan University, Taipei 10617 d93522022@gmail.com 
Ho Chang Department of Mechanical Engineering, National Taipei University of Technology, Taipei 10608  
Ching-song Jwo Department of Energy and Refrigerating Air-Condition Engineering, National Taipei University of Technology, Taipei 10608  
Hsiao Ju Feng Department of Mechanical Engineering, National Taiwan University, Taipei 10617  
Abstract:
Self-made TiO2 nanoparticles were used as photoelectrode material of dye sensitized solar cell. The TiO2 thin film coats through spreading nanoparticles evenly onto the ITO glass via self-made spin-heat platform, and then TiO2 thin film is soaked in the dye N-719 more than 12 h to prepare the photoelectrode device. The TiO2 nanoparticles produced by electric-discharge-nanofluid-process have premium anatase crystal property, and its diameter can be controlled within a range of 20-50 nm. The surface energy zeta potential of nanofluid is from -22 mV to -28.8 mV, it is a stable particle suspension in the deionized water. A trace of surfactant Triton X-100 put upon the surface of ITO glass can produce a uniform and dense TiO2 thin film and heating up the spin platform to 200 oC is able to eliminate mixed surfac-tant. Self-made TiO2 film presents excellent dye absorption performance and even doesn't need heat treatment procedure to enhance essential property. Results of energy analysis show the thicker film structure will increase the short-circuit current density that causes higher conversion efficiency. But, as the film structure is large and thick, both the open-circuit voltage and fill factor will decline gradually to lead bad efficiency of dye-sensitized solar cell.
Key words:  Electric-discharge-nanofluid-process, Photoelectrode, TiO2 film, Anatase, Energy conversion efficiency
FundProject:
TiO2 Nanoparticles Produced by Electric-Discharge-Nanofluid-Process as Photoelectrode of DSSC
陈希立,苏宏庭*,张合,卓清松,冯啸儒
摘要:
利用自制TiO2纳米粒子研究敏化染敏太阳能电池. 使用自制的旋转涂布加热平台装置将产出的TiO2粒子均匀的涂布在ITO导电玻璃上形成薄膜,浸泡于N-719 染料中12小时以上作为DSSCs的光电极 元件,最后完成染料敏化太阳能电池的系统组装并进行光电转换效率测量. 实验结果表明,放电过程产出的TiO2纳米粒子具有锐钛矿晶相,粒径尺寸可控制在20~70 nm,粒子表面电位约为-30 mV,是稳定的纳米悬浮夜. 添加0.5 mL 的Triton X-100在导电玻璃表面上,利用的旋转涂布加热到22 oC可以制得厚度均匀缜密的薄膜结构,不但粒子不受到热处理效应与介面活性剂的影响而发生晶相改变,并且薄膜也有良好的染料吸附效果. 较厚二氧化钛薄膜的光电极会提升敏化染敏太阳能电池的效率. 实验结果得知,以15 μm的二氧化钛薄膜组装DSSCs测得最高效率2.15%,但是当薄膜厚度超过15 μm 则会导致开路电压与充填因子逐渐下降,光电转换效率变差.
关键词:  放电式纳米流体制程,旋转加热平台,光电极,二氧化钛薄膜,锐钛矿,光电转换效率
DOI:10.1088/1674-0068/23/02/231-236
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