在染料敏化太陽能電池(Dye-Sensitized Solar cells, DSSC)內部的各個反應界面中，電子的再結合反應為造成電池效率無法提升的主要原因之一。具有異質接面之複合材料，因其互相匹配之能帶位置，能有效幫助電子的傳遞，抑制電子的再結合反應，提高電池的轉換效率。本實驗利用TiO2(commercial anatase TiO2與P25)與Sr(OH)2，以水熱法在120˚C下反應不同時間，合成具有不同SrTiO3含量之SrTiO3/TiO2奈米粉末，並以此複合材料當做工作電極，應用於DSSC。在DSSC的表現上，開路電壓大幅提升，但短路電流卻下降，造成電池之轉換效率無法提升。雖然SrTiO3/TiO2可有效抑制電子的再結合，但因其具有較高之平帶電位，可能會影響電子注入的驅動力，減緩電子注入的速度，造成光電流無法提升。本實驗將近一步討論染料的吸附、電子注入效率與收集電子的能力，詳細探討影響DSSC表現之各種因素。

In dye-sensitized solar cells (DSSC), the TiO2/dye/electrolyte interface affects the photoelectron conversion efficiency seriously because of the charge recombination reaction. In addition, hybrid semiconductor materials with match band potential are important in photoelectric applications result from suppressing photogenerated charge and hole recombination. Here, the SrTiO3/TiO2 nanocomposite was employed as the anode of a DSSC. The SrTiO3/TiO2 hybridstructure was synthesized by hydrothermal of TiO2 and Sr(OH)2 at 120°C for different reaction time. In the DSSC, the open circuit voltage increased while the short circuit photocurrent enormously decreased as SrTiO3 modified TiO2 was used as anode. Despite the suppression of charge recombination, the SrTiO3/TiO2 system could simultaneously impede the electron injection, which limited the short circuit photocurrent performance. The reaction details of light harvesting efficiency, charge injection efficiency and charge collection efficiency were studied

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