稀土金属酞菁在MPc_2－GaAs半导体电极上的光伏效应

Photovltaic Effect for Metallophthalocyanine Complexes of Rare Earth Metals on MPc_2-GaAs Semiconductor Electrodes

在光电化学电池中分别测定六种稀土金属酞菁配合物（ＭＰｃ＿２）在ＧａＡｓ单晶电极上所形成ｎ＋ｎ异质结的光伏效应（ＰＶＥ），并研究不同介质电对和介质溶液的酸碱性对光伏效应的影响。结果表明：１）Ｏ＿２／Ｈ＿２Ｏ（ＫＣｌ溶液）与Ｉ＿２／是两种较好的介质电对；２）介质酸碱性的改变对稀土金属酞菁的光伏效应有较大的影响；３）六种稀土金属酞菁中ＬａＰｃ＿２、ＹＰｃ＿２与ＣｅＰｃ＿２具有较大的光伏效应。

The photovoltaic effects(PVE) for metallophthalocynine complexes of six rareearth metals on GaAs single crystal electrode forming n+n heterojunction in the photoelectrochemicalcells were studied respectively, Influences of various redox couples and pH in medium on the photo-voltaic effects were observed,The results showed that:1)O_2/H_2O(KCI) and I_2/ were two kinds ofbetter redox cuuples,in the photoelectrochemical cells.2)the changes of meduim acidity-basicity hadgreater influences on PVE of MPc_2.3)LaPc_2、 YPc_2 and CePc_2 possessed better photovoltaic propertiesthan the others among the six metallopthalocyanine complexes of rare earth nletals.