Incubation of PbSe Thin Films in a Tin(Ⅱ) Salt Aqueous Solution:Modification and Ion-Exchange Reactions  

作　　者：Zinaida I.Smirnova Larisa N.Maskaeva Vyacheslav F.Markov Vladimir I.Voronin Mikhail V.Kuznetsov 

机构地区：[1]Ural Federal University(named after the First President of Russia B.N.Yeltsin),ul.Mira 19,Yekaterinburg,620002,Russia [2]Ural Institute of State Fire Service of EMERCOM of Russia,Yekaterinburg,ul.Mira 22,620062,Russia [3]Institute of Metal Physics,Ural Branch,Russian Academy of Sciences,ul.S.Kovalevskoy 18,Yekaterinburg,620041,Russia [4]Institute of Solid State Chemistry,Ural Branch,Russian Academy of Sciences,ul.Pervomaiskaya 91,Yekaterinburg,620990,Russia

出　　处：《Journal of Materials Science & Technology》2015年第8期790-797,共8页材料科学技术（英文版）

基　　金：supported by Act 211 of the Government of the Russian Federation No.02.A03.21.0006;the Ministry of Education and Science of Russia under government task No.4.1270.2014/K

摘　　要：Topochemical ion-exchange reactions between solid micro- and nanostructured metal chalcogenides and aqueous salt solutions are generally used for formation of composite structures based on initial metal chalcogenides and products of their ion-exchange transformation. However, ion exchange has promises as a route to obtaining both composites and solid solutions based on the initial and the end chalcogenide phases. With the help of the ion-exchange technique, single-phase films of Phi xSnxSe substitutional solid solutions with a tin content up to -2 at.%, which are promising for mid- and long-wavelength infrared radiation （IR） optoelectronics, have been obtained at the interface between PbSe poly- crystalline thin films and SnCl2 aqueous solutions containing sodium citrate. It has been shown that the pH value and temperature of the reaction system play an important role in the ion-exchange process. Incubation of lead selenide （PbSe） films in a tin（II） salt aqueous solution also leads to their modification with oxygen-containing tin compounds to a depth of-3 nm. Differences in the film structure, such as changes in the coherent scattering region sizes and orientation of crystallites along the [220] direction, which arise during the contact with citrate-containing SnCl2 solutions, have also been revealed. For the first time, an idea of the existence of a relatively wide reaction zone of an intragranular topochemical ion-exchange reaction in an aqueous solution, within which substitutional solid solutions can form in micro- and nanostructured systems, has been set forth.Topochemical ion-exchange reactions between solid micro- and nanostructured metal chalcogenides and aqueous salt solutions are generally used for formation of composite structures based on initial metal chalcogenides and products of their ion-exchange transformation. However, ion exchange has promises as a route to obtaining both composites and solid solutions based on the initial and the end chalcogenide phases. With the help of the ion-exchange technique, single-phase films of Phi xSnxSe substitutional solid solutions with a tin content up to -2 at.%, which are promising for mid- and long-wavelength infrared radiation （IR） optoelectronics, have been obtained at the interface between PbSe poly- crystalline thin films and SnCl2 aqueous solutions containing sodium citrate. It has been shown that the pH value and temperature of the reaction system play an important role in the ion-exchange process. Incubation of lead selenide （PbSe） films in a tin（II） salt aqueous solution also leads to their modification with oxygen-containing tin compounds to a depth of-3 nm. Differences in the film structure, such as changes in the coherent scattering region sizes and orientation of crystallites along the [220] direction, which arise during the contact with citrate-containing SnCl2 solutions, have also been revealed. For the first time, an idea of the existence of a relatively wide reaction zone of an intragranular topochemical ion-exchange reaction in an aqueous solution, within which substitutional solid solutions can form in micro- and nanostructured systems, has been set forth.

关 键 词：Ion-exchange synthesis Thin films Lead selenide Tin selenide Substitutional solid solutions Topochemical reaction 

分 类 号：TB383.2[一般工业技术—材料科学与工程]