CN109280906A - 一种硫化铅薄膜 - Google Patents

一种硫化铅薄膜 Download PDF

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CN109280906A
CN109280906A CN201811463891.9A CN201811463891A CN109280906A CN 109280906 A CN109280906 A CN 109280906A CN 201811463891 A CN201811463891 A CN 201811463891A CN 109280906 A CN109280906 A CN 109280906A
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solution
lead
sodium
potassium
lead sulfide
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孙喜桂
石磊
张艺宁
张云瑞
王建鹏
汪嘉
汪嘉一
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Shandong Jianzhu University
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/02Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition
    • C23C18/12Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
    • C23C18/1204Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
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    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G21/00Compounds of lead
    • C01G21/21Sulfides

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  • Inorganic Chemistry (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)

Abstract

本发明涉及一种硫化铅薄膜,属于半导体材料的制备领域。本发明采用的是醋酸铅和硫粉,分别为铅源和硫源,以硫粉和亚硫酸钠为原料制备硫代硫酸钠,以酒石酸钾钠为络合剂,通过氢氧化钾调节pH值,将沉积液放置水浴锅中,在75℃下加热4小时,干燥后得到的硫化铅薄膜。本发明合成方法中所用的原料易得,工艺简便,成本低、收率高和能大规模生产薄膜的优点,因此该方法具有非常广阔的应用前景。

Description

一种硫化铅薄膜
技术领域
本发明涉及一种硫化铅薄膜,该方法简便易行,无毒环保,具有普适性,能够在实验室中进行快速有效的制备,属于半导体材料的制备领域。
背景技术
硫化铅薄膜是一类重要的半导体材料,窄禁带(0.41eV)较并且激发玻尔半径(18nm)较大,因为其介电常数较大,折射率高,可以制成具有高折射率的红外光学薄膜,并且广泛的应用于制造红外探测器、激光发射器、热电转换器、太阳能电池、发光二极管、超离子材料、薄膜晶体管等半导体器件。该材料在国防及工、农业建设中得到了大规模应用,近几十年来受到了科学界的广泛重视。
制备硫化铅薄膜的方法有很多,如低温水热法、化学反应法(CRM)、电化学沉积法( ECD )、连续离子反应法、溶胶-凝胶法(SGM)等。与这些制备方法比较,化学液相法从性能价格比上来说具有明显的优势,是广泛应用的一种方法。在相对较低的温度下,不需要任何特殊的设置和任何复杂的仪器,且制备的薄膜晶粒更加紧密,表面更加光滑。化学液相法具有成本低、收率高和能大规模生产薄膜等特点,在合成金属硫族化物晶体时有很大前景。
对比论文文献:
刘峰. 化学液相法制备PbS红外光电薄膜及其性能研究[D]. 成都:电子科技大学,2012:17-21.与本专利相似,但也有很大的区别,在此特地指出。首先,原料的不同,论文文献采用在氢氧化钠溶液体系中制备PbS薄膜,而本发明中采用酒石酸钾钠作为制备原料,酒石酸钾钠是作为络合剂使用的,具有很好的络合性能,被广泛应用于电镀工业,得到的薄膜更加细致,可见附图2;其次,本专利的实验顺序、过程是要按照严格地络合过程来实现的,这是通过大量实验验证得到的。
发明内容
本发明是针对现有技术的不足,发明了一种硫化铅薄膜。
本发明采用的是化学液相法,其中醋酸铅和硫粉,分别为铅源和硫源,以硫粉和亚硫酸钠为原料制备硫代硫酸钠,以酒石酸钾钠为络合剂,通过氢氧化钾调节pH值,将沉积液放置水浴锅中,在75℃下加热4小时,干燥后得到的硫化铅薄膜。本发明合成方法中所用的原料易得,工艺简便,成本低、收率高和能大规模生产薄膜的优点,因此该方法具有非常广阔的应用前景。
化学液相法制备硫化铅薄膜的实验原理如下:
S + Na2SO3 → Na2S2O3
(S2O3)2- + 2OH- →S2- + SO4 2- + H2O
Pb2+ + S2- → PbS↓
此种硫化铅半导体薄膜的制备方法的步骤是:
(1)制备前对衬底进行去油、去污清洗,放入无水乙醇中经过超声波清洗25~30min,再放入无水乙醇中浸泡;
(2)配制出0.2mol/L的醋酸铅溶液、1 mol/L酒石酸钾钠溶液,将5g硫粉和12g亚硫酸钠放入烧杯中,加蒸馏水至100mL,在90℃下边搅拌边加热24h,过滤除去未反应的硫粉和硫酸盐后制备出0.2 mol/L硫代硫酸钠溶液;
(3)边搅拌边将20mL的酒石酸钾钠溶液缓慢地倒入30mL的醋酸铅溶液中,此为酒石酸钾钠的络合过程;再将6~8mL的硫代硫酸钠倒入二者的混合溶液中,以沉积液的颜色变化,由浅棕色变至棕色再变至咖啡色最后至黑色,来判断硫代硫酸钠的具体用量;并使用氢氧化钾溶液调节pH值至11.0~12.0,加入去离子水至100mL;
(4)将衬底吹干后,放入沉积液中,沉积液放入75℃恒温水浴锅中,4小时后取出沉底,使用吹风机冷风吹干,得到硫化铅薄膜。
利用X射线衍射分析了所得硫化铅薄膜的相结构,结果如图1所示;利用金相显微镜分析了所得硫化铅薄膜的形貌图,结果如图2所示。
所得结果表明晶核分布比较均匀,薄膜较为致密且外观平整,已稳定成完全多晶结构,其密度得到改善。
与现有技术相比,本发明中所使用的化学液相法具有成本低、收率高和能大规模生产薄膜等特点,该方法简便易行,无毒环保,能够在实验室中进行快速有效的制备,具有普适性。
附图说明
图1是硫化铅薄膜的XRD衍射图谱。
图2是硫化铅薄膜的金相显微镜图:(a) 沉积时间3.0h,(b) 沉积时间3.5h,(c)沉积时间4.0h。
具体实施方式
制备前对衬底进行去油、去污清洗,放入无水乙醇中经过超声波清洗后,再放入无水乙醇中浸泡,沉积时使用;配制出0.2mol/L的醋酸铅溶液,1mol/L的酒石酸钾钠溶液和0.2mol/L硫代硫酸钠溶液;边搅拌边将30mL的醋酸铅溶液、20mL的酒石酸钾钠溶液和6~8mL硫代硫酸钠溶液混合,再使用氢氧化钾溶液调节pH值至11.0~12.0,加入去离子水至100mL;准备三个沉底,吹干后放入75℃恒温水浴锅中的沉积液中,分别在3小时后,3.5小时后,4小时后取出沉底,得到硫化铅薄膜。

Claims (1)

1.一种硫化铅薄膜,主要特征在于:包括0.2mol/L醋酸铅、1 mol/L酒石酸钾钠、5g硫粉、12g亚硫酸钠、氢氧化钾,制备过程如下:制备前对衬底进行去油、去污清洗,放入无水乙醇中经过超声波清洗后,再放入无水乙醇中浸泡,沉积时使用;配制出0.2mol/L的醋酸铅溶液,1mol/L的酒石酸钾钠溶液和0.2mol/L硫代硫酸钠溶液;边搅拌边将30mL的醋酸铅溶液、20mL的酒石酸钾钠溶液和6~8mL硫代硫酸钠溶液混合,再使用氢氧化钾溶液调节pH值至11.0~12.0,加入去离子水至100mL;吹干后放入75℃的沉积液中,4小时后取出衬底。
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102465284A (zh) * 2010-11-19 2012-05-23 北京佳盛世纪科技有限公司 一种太阳能中高温选择性吸收涂层及制备
CN107315215A (zh) * 2017-06-15 2017-11-03 中国科学院合肥物质科学研究院 宽吸收光谱的硫化铅薄膜及其制备方法

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Publication number Priority date Publication date Assignee Title
CN102465284A (zh) * 2010-11-19 2012-05-23 北京佳盛世纪科技有限公司 一种太阳能中高温选择性吸收涂层及制备
CN107315215A (zh) * 2017-06-15 2017-11-03 中国科学院合肥物质科学研究院 宽吸收光谱的硫化铅薄膜及其制备方法

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崔占奎 等: ""化学水浴法制备ZnS薄膜及其光学性能"", 《化工新型材料》 *

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