高比表面纳米二氧化钛胶体、多孔电极及DSC电池的制备

Preparation of High Specific Surface Area Nano-TiO_2 Colloid,Meso-porous Electrode and Dye-sensitized Solar Cells

以钛酸四丁酯为前驱物,冰醋酸为水解抑制剂,浓硝酸为胶溶剂,结合溶胶-凝胶与水热处理法成功制备了具有高比表面积的纳米二氧化钛胶体。除水、酸后,浓缩并添加有机粘结剂制成了纳米TiO2浆料。刷制多孔电极并组成电池后测试了其光电特性。调整胶溶剂-浓硝酸的添加量,制备了具有不同颗粒大小、晶型、比表面积的TiO2纳米颗粒。为了提高多孔薄膜的光散射效应,在浆料中添加了400 nm TiO2粉体,研究了其掺入量对电池特性的影响。结果表明,当硝酸加入量为1 mL、掺入20%大颗粒TiO2时,制备的电池效率达到4.19%(Jsc=8.32 mA/cm2,Voc=0.76 V,FF=66.31%)。

Nano-TiO2 colloid with high specfic surface area was prepared by sol-gel and hydrothermal method using tetrabutyl titanateas as precucer, acetic acid as hydrolysis inhibiter and concentrated nitric acid as petizing agent. After eliminating water and acid, the colloid was concentrated, and organic adhesive was added to make nano-TiO2. Nano-TiO2 porous electrode was prepared by screen-printing technique, and it was equipped to solar cell with electrolyte and opposite electrode. The photovoltaic performance was measured. Addition of HNO3 was changed to prepare a series of nano-TiO2 particles with different particle size, crystalline and specfic surface area. For improving the light-scattering effect of the films, we added various contents of 400nm-TiO2 particles. The results show that HNO3 addition and content of 400 nm TiO2 powders have great influence on particle size, distribution, crystalline of TiO2 powders and the efficiency of the cell. The highest efficiency of 4.19% with Jsc = 8.32 mA/cm2, Voc = 0.76 V, and FF = 66.31% was achieved.