Enhancement of Dye-Sensitized Solar Cells Efficiency Using Mixed-Phase TiO(2) Nanoparticles as Photoanode.
Enhancement of Dye-Sensitized Solar Cells Efficiency Using Mixed-Phase TiO(2) Nanoparticles as Photoanode.
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作者：
Fan YH;Ho CY;Chang YJ
染料敏化太阳能电池（DSSC）具有效率高、成本低、能耗低等优点，有望取代传统的硅基太阳能电池。在这份报告中，混合相（金红石和金红石纳米粒子）二氧化钛光阳极的合成，以调查材料特性，载流子传输，和未来的DSSC应用的光伏性能。采用场发射扫描电子显微镜（SEM）、X射线衍射（XRD）、光致发光（PL）和紫外-可见光谱（UV-vis）对混合TiO 2颗粒进行了表征。随后，各种混合相TiO 2阳极DSSC设备进行了测量的电阻抗谱（EIS）和能量效率转换。由于TiO_2的金红石相含量增加（14%），DSSC芯片的整体能量转换效率得到了提高。TiO 2晶化、能带缺陷密度降低、光激发电子寿命延长、电子通道电阻降低等协同效应均有助于提高光能转换效率。
Dye-sensitized solar cell (DSSC) is a potential candidate to replace conventional silicon-based solar cells because of high efficiency, cheap cost, and lower energy consumption in comparison with silicon chip manufacture. In this report, mixed-phase (anatase and rutile nanoparticles) TiO2 photoanode was synthesized to investigate material characteristics, carriers transport, and photovoltaic performance for future DSSC application. Field-emission scanning electron microscope (SEM), X-ray diffraction (XRD), photoluminescence (PL), and UV-visible spectroscopy were used to characterize mixed TiO2 particles. Subsequently, various mixed-phase TiO2 anodes in DSSC devices were measured by electrical impedance spectra (EIS) and energy efficiency conversion. The overall energy conversion efficiency of DSSC chip was improved as a result of the increase of rutile phase of TiO2 (14%) in anatase matrix. Synergistic effects including TiO2 crystallization, reduction of defect density level in energy band, longer lifetime of photoexcited electrons, and lower resistance of electron pathway all contributed to high efficiency of light energy conversion.