Incubation of PbSe Thin Films in a Tin（Ⅱ） Salt Aqueous Solution:Modification and Ion-Exchange Reactions
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2015年第8期
论文作者：Zinaida I.Smirnova Larisa N.Maskaeva Vyacheslav F.Markov Vladimir I.Voronin Mikhail V.Kuznetsov
文章页码：790 - 797
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 Pb1-xSnxSe substitutional solid solutions with a tin content up to2 at.%,which are promising for mid-and long-wavelength infrared radiation（IR）optoelectronics,have been obtained at the interface between PbSe polycrystalline 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 of3 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.
Zinaida I.Smirnova1，Larisa N.Maskaeva1,2，Vyacheslav F.Markov1,2，Vladimir I.Voronin3，Mikhail V.Kuznetsov4
1. Ural Federal University(named after the First President of Russia B.N.Yeltsin),ul.Mira 19,Yekaterinburg,620002,Russia3. Institute of Metal Physics,Ural Branch,Russian Academy of Sciences,ul.S.Kovalevskoy 18,Yekaterinburg,620041,Russia4. Institute of Solid State Chemistry,Ural Branch,Russian Academy of Sciences,ul.Pervomaiskaya 91,Yekaterinburg,620990,Russia
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 Pb1-xSnxSe substitutional solid solutions with a tin content up to2 at.%,which are promising for mid-and long-wavelength infrared radiation（IR）optoelectronics,have been obtained at the interface between PbSe polycrystalline 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 of3 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.
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