宽带pcuscn薄膜弱碱条件下的电沉积

《宽带pcuscn薄膜弱碱条件下的电沉积》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、摘要纳米晶太阳能电池(NPC)以其工艺简单，成本低廉等优势成为太阳能电池领域的研究热点。本文综述了各种太阳能电池的发展情况，研究了NPC电池固体空穴传输层CuSCN薄膜的电沉积制备及其在ZnO棒晶阵列中的填充过程和机理。本文采用TEA作为络合剂制各出稳定的CuSCN的弱碱性水基电沉积溶液，pH值约为8．5～9，从而能确保不耐酸腐蚀的基底材料被有效使用；电沉积制备出了致密度高，透光性好及具有P型电导的CuSCN半导体薄膜；采用FESEM、XRD、XPS、UV-VIS表征了薄膜的结晶形貌、相组成、化学组成、透光率和带隙值。研究了各种工艺参

2、数，如阴极沉积电压、电沉积溶液的组成、沉积时问和沉积温度等对沉积过程和薄膜结构与性能的影响。结果表明，这些工艺参数对电沉积薄膜的沉积速率、晶粒尺寸和致密度、晶粒的生长方向等有重要影响。最后，本文研究了CuSCN在ZnO棒晶阵列上的成核和生长过程，并由此提出了CuSCN在ZnO棒晶阵列中填充时的反偏压内建电场沉积机理；电沉积制得的CuSCN／ZnO互穿异质结具有良好的整流特性说明n型ZnO和P型CuSCN之间形成了很好的界面结合；制得的CuSCN／ZnO互穿异质结的透光性能主要由ZnO棒晶阵列的纳米结构所决定。关键词：CuSCN薄膜；电

3、化学沉积：TEA；弱碱性水基电沉积溶液ABSTRACTNanocrystalphoto-eletrochemicaleeUs(NPC)havebeenwidelystudiedduetotheirlowcostandsimpletechnology．Inthispaper,developmentsonNPCcellsanditssolidholeconductinglayerswerereviewed．ElectrodepositionofCuSCNthinfilmastheholeconductingmaterialaswellas

4、itsfillinginZnOrodarrayswasinvestigated．AstableaqueouselectrolytesolutioncontainingCu2+andSCN。waspreparedbYaddingtriethanolamine(TEA，N(CH2CH20H)3)tochelatewithCu(II)cations．TheelectrolytesolutionswerebasicwithpHvaluesintherangeof8．5-9andcouldbeusedintheelectrodeposition

5、ofCuSCNasholeconductinglayeronthesubstrateswhichwereafraidofacidfromacidicetching．TheP-typeCuSCNthinfilmswithhi曲transmittancewerepotentiostaticallydepositedonITOglasssubstratesbytheas—preparedaqueouselectrolytesolution．Thecrystallinemorphology,phasecomposition，chemicalc

6、omposition，opticaltransmittanceandenergybandgapofCuSCNfilmswereanalyzedbyFESEM，XRD，XPSandUV-VIS．Theinfluenceoftheelectrodepositonparameters，suchasappliedpotentials，electrolytecomponents，depositontimeanddepositiontemperaturesonparticlemorphology,phaseandstoichiometryofth

7、eCuSCNfilmswereinvestigated．NucleationandgrowthofCuSCNonZnOrodarrayswasstudied．HomogeneousgrowthofCuSCNonZnOrodarraysshouldbeattributedtothereversebiasmechanismleadingtopriorgrowthonthebareZnOrods．Thecontactbetweenthe胛-andP-typesemiconductorshadaclearrectification，indic

8、atingagoodelectricalcontactformedbetweenthelargeinternalsurfaceofZnOrodarraysandtheembeddedCuSCN．Opticalmeasur