TiO_2纳米晶复合纳米棒染料敏化太阳能电池

DSSCs Using a Nanoparticle/Nanorod Composite TiO_2 Film as a Photoanode

通过二次水热法合成锐钛矿TiO_2纳米棒(ANR).采用X射线衍射(XRD)、场发射扫描电镜(FE-SEM)和透射电镜(TEM)等手段对其进行表征.通过调节ANR和锐钛矿纳米颗粒(ANP)的掺杂比例来增加TiO_2纳米晶膜的光捕获效率和电子传输速率,并对比了单层结构(ANR+ANP)和双层结构(ANP/(ANR+ANP))的纳米晶膜光阳极的光电转化性能.在AM1.5、光强100 mW·cm^(-2)的模拟太阳光下测试,染料N719敏化的双层结构太阳能电池光电转化效率达7.3%,比相同条件下单层纯ANP光阳极器件的光电转化效率(6.1%)提高了20%.

TiO2 anatase nanorods （ANR） were synthesized by a two-step hydrothermal method. The materials were characterized by X-ray diffraction （XRD）, field emission scanning electron microscopy （FE-SEM）, and transmission electron microscopy （TEM）. To increase the light harvesting efficiency and electron transfer rate, N719 dye-sensitized solar cells （DSSCs） were constructed and compared by adjusting the doping ratio of the anatase nanoparticles （ANP） and ANR in the TiO2 nanocrystalline film that was used as a photoanode in the DSSCs. The best light-to-electricity conversion efficiency （7.3%） was obtained for a double-layered photoanode （ANP/（ANR＋ANP）） cell, which is 20% higher than the traditional single-layered ANP cell （6.1%） when tested under the same conditions and at AM 1.5, 100 mW. cm-2.