叶绿素铜钠盐敏化SnO_2超微粒薄膜的光电转换性能

Photoelectrochemical Studies on Sodium and Copper Salts of Chlorophyllin Sensitized SnO 2 Ultra Particle Film Photoelectrodes

采用直流气体放电活化反应蒸发沉积法，制备ＳｎＯ２超微粒薄膜（ＵＰＦ）作光电极。ＳＥＭ分析结果表明，平均粒径为６０ｎｍ。采用叶绿素铜钠盐作光敏剂、ＳｎＯ２ＵＰＦ作光电极、Ｉ－／Ｉ３－氧化还原对作电解液、导电玻璃或镀有金属铝膜的载玻片作集电极，制作光电化学基片。研究Ｉ－／Ｉ３－电解液、染料、两极距离及不同集电极对光电性能的影响，获得单位面积的开路电压（ＶＯＣ）为２６８ｍＶ，短路电流（ＩＳＣ）为２０μＡ。

The SnO 2 UPF used as photoelectrode is prepared by a method called DC gas discharge activating reacting deposition by us. The average particle size of SnO 2 UPF measured by SEM is 60nm. The photoelectrodes are sensitized by immersing SnO 2 UPF in a ethanol solution of sodium and copper salts of chlorophyllin overnight. Conductive glass or Al film coated glass is adopted as the counter electrode and electrolyte containing redox couple I -/I 3 - is adopted to regenerate the cells. The influence of I -/I 3 -, dye, distance between two electrodes and different materials of counter electrode are discussed. The maximal open circuit voltage is 268mV and the maximal short circuit current is 20μA.