【摘要】 测定了Cu_xS/CdS薄膜电池中CdS和Cu_xS层的组成、结构、形貌及电池各组份的原子浓度的深度分布和铜离子的价态变化等。CdS、Cu_xS均按一定的化学计量组成,Cu、Cd是深度的函数,Cu_xS中X值接近2。提高热处理温度或延长时间,可能引起Cd、Cu组份的较大变化。更多还原

【Abstract】 For optimizing the conversion performance and exploring the mechanism of degradation of CuxS/CdS solar cells,the chemical compositions and structure of CdS and CuxS were studied.The computer-generated depth composition profiles plotted as a function of concentration of atoms,as well as the variation of the chemical states valence of Cu and S have been examined.The results of this study suggest that (1) The composition of CdS and CuxS films both are stoichiometric.X for CuxS is about 2.(2) The relative content of S keeps constant at 50% independent of condition of preparation.The content of Cd raises with increasing of the depth of composition profiles from the surface.Concentration of Cu may reach 30% or even more.With increasing of the temperature and prolongation of the storage,the atoms of Cu would be diffused into CdS substrate.(3) The binding energy of the original films Cu2S is 932.5 eV for Cu 2P3/2 and 162.0 eV for S 2P.After being used for a long time,the binding energy at surface becomes 1.2 eV for Cu 2P3/2 and 1.0 eV for S 2P higher than that in the interior.更多还原