Preparation and photovoltaic application of oxide thin films withlow defect concentration by aqueous electrochemical process

水法制备ZnO/Cu2O太阳能电池具有安全、可靠、低成本、环保等特点。在本研究中，采用电化学方法制备了ZnO和Cu2O薄膜。通过对ZnO的成核和初始生长进行评价和改进，获得了致密、连续、高再现性的薄膜。研究了电解液中氧源、羟基和溶解氧浓度对Cu2O晶格常数的影响。已知晶格常数受Cu空位浓度的影响，而Cu空位是载流子的来源之一。结果表明，通过改变氧源浓度可以控制Cu2O膜的载流子密度。

ZnO/Cu2O solar cell fabricated by aqueous process is safe, secure, low cost and environment-friendly . In this study, thin films of ZnO and Cu2O were deposited by the electrochemical process. By evaluation and improvement of the nucleation and initial growth of ZnO, dense and continuous thin films are obtained with high reproducibility . Dependence of the lattice constant of Cu2O on the concentrations of oxygen sources, hydroxyl and dissolved oxygen in the electrolytes, were also evaluated. It is known that he lattice constant is influenced by the concentration of Cu vacancy which is an origin of the carrier. The results suggest that the carrier density of Cu2O films can be controlled by changing the concentration of oxygen sources.