摘要
采用恒电位电沉积法制备了CuInSe_2薄膜材料,通过循环伏安分析探讨了Cu^(2+)、In^(3+)和H_2SeO_3单独沉积和共沉积的电化学行为,并研究了沉积电位对薄膜化学计量组成、形貌和物相组成的影响规律。研究表明:柠檬酸根离子对Cu^(2+)和H_2SeO_3具有络合作用,而对In^(3+)的络合不明显。共沉积时,Cu最先还原,然后诱导Se的沉积,两者反应形成的铜硒化合物Cu_xSe又诱导In的欠电位沉积,并与之反应生成CuInSe_2。在阴极电位为-0.58~-0.90Vvs.SCE时出现了不随电位变化的极限还原电流,在该电位范围内进行电沉积获得了化学计量组成稳定可控且相对致密平整的CuInSe_2薄膜。
CuInSe2 thin films were prepared by potentiostatic electrodeposition. Electrochemical behaviors of Cu2+ , In3+and H2SeO3 in idividual electrodeposition and co-electrodeposition were studied by cyclic voltammetry. The influence of deposition potential on film stoichiometry, morphology and structure were also investigated. The results showed that cit-rate ions presents the complexing effect on Cu2+ and H2SeO3 but no effect on In3+. When co-ectrodeposition, Cu reduces first, then the Se reduction which leads to Cux Se formation. Cux Se finally induces In3+ reduction and CuInSe2 (CIS) for-mation. A limiting current was abserved at potentials between - 0.58 ~ - 0.90V vs the saturated calomel electrode (SCE) at which smooth and dense CIS thin films with controllable stoichiometry have been obtained.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第1期45-49,共5页
Acta Energiae Solaris Sinica
基金
湖南省科技支撑计划(No.2007FJ4108)
湖南省研究生科研创新项目(1343-74236000009)