溶液法制备的Cu 2 MSnS 4 （M=Zn，Gd）和Cu 2 SnS 3 薄膜及其太阳电池研究

发布时间：2021-08-21 21:55

　　通过太阳电池将太阳光转换成电能是利用可持续能源的重要方式。为获得低成本,稳定和高效的太阳电池,人们迫切需要可溶液法加工制备的无机半导体薄膜材料。由于具有地球含量丰富的元素、高环境稳定性、适合的带隙（Eg）和高吸收系数（α）,多元铜基硫属化物Cu2MSnS4（M=Zn,Cd）（CMTS）和Cu2SnS3（CTS）等是很有希望的太阳电池的光吸收材料。本论文旨在发展原位溶液加工法来在透明导电衬基表面制备CMTS和CTS薄膜,并研究其太阳电池的光伏性能。本论文的主要研究工作和结论如下:1)发展了一种重复旋涂和退火（RSCA）的溶液加工法,在ITO衬基表面原位生长Cu2ZnSnS4（CZTS）纳米颗粒致密薄膜;该方法的特点在于退火温度低（300℃）、退火时间短（5 min）及分子型前驱液稳定。所制备的CZTS薄膜的带隙为Eg=1.48 eV,光吸收系数为α>104cm-1。以CZTS薄膜为空穴传输材料（HTM）,制备了结构为ITO/CZTS/MAPbI3/PCBM/BCP/Ag的反向平板异质结钙钛矿太阳电池。发现钙钛矿太阳电池的性能显著地依赖于CZTS薄膜厚度,且厚度小于100nm的CZT... 

【文章来源】：中国科学技术大学安徽省 211工程院校 985工程院校

【文章页数】：132 页

【学位级别】：博士

【文章目录】：
摘要
ABSTRACT
Chapter 1 Introduction
    1.1 Overview
        1.1.1 Solar radiations
        1.1.2 Working principle of a solar cell
        1.1.3 Current-voltage (J-V) characteristics of a solar cell
    1.2 Thin film solar cells
        1.2.1 Perovskite solar cells
            1.2.1.1 Material properties
            1.2.1.2 Solution-based preparation methods of perovskite
            1.2.1.3 Device structure of perovskite solar cells
            1.2.1.4 HTMs in perovskite solar cells
            1.2.1.5 CZTS HTM for MAPbI_3 based perovskite solar cells
        1.2.2 Cu_2MSnS_4(M=Zn, Cd)and Cu_2SnS_3solar cells
            1.2.2.1 Cu_2ZnSnS_4thin film solar cells
                1.2.2.1.1 Cu_2MSnS_4 (M=Zn, Cd) properties
                1.2.2.1.2 Phase characterizations in Cu_2MSnS_4 (M=Zn, Cd)
                1.2.2.1.3 Cu_2ZnSnS_4 solution-based preparation
                1.2.2.1.4 Cu_2ZnSnS_4 solar cells
            1.2.2.2 Cu_2SnS_3thin film solar cells
                1.2.2.2.1 Basic properties
                1.2.2.2.2 Material preparation
                1.2.2.2.3 Cu_2SnS_3 solar cells
            1.2.2.3 Cu_2CdSnS_4thin film solar cells
                1.2.2.3.1 Cu_2CdSnS_4 solution-based preparation and solar cells
    1.3 Research motivations
        1.3.1 Cu_2ZnSnS_4 nanoparticle film for HTM in perovskite solar cells
        1.3.2 Cu_2SnS_3 nanoparticle films for solar cells
        1.3.3 Cu_2CdSnS_4 bulk thin film for solar cells
        1.3.4 Cu_2ZnSnS_4 bulk thin film for solar cells
Chapter 2 Solution-processed Cu_2ZnSnS_4 Nanoparticle Film as EfficientHole-transporting Material for Stable Perovskite Solar Cells
    2.1 Introduction
    2.2 Experimental section
        2.2.1 Chemicals and materials
        2.2.2 CZTS film materials preparation
        2.2.3 Solar cell fabrication
        2.2.4 Characterizations
    2.3 Results and discussion
        2.3.1 CZTS film preparations and characterizations
        2.3.2 CZTS/MAPbl_3 film characterizations
        2.3.3 Solar cells
            2.3.3.1 CZTS/MAPbl_3 based solar cells
            2.3.3.2 PEDOT: PSS/MAPbl_3based solar cells
            2.3.3.3 CZTS/CdS solar cells
    2.4 Conclusion
Chapter 3 Solution-processed Extremely Thin Films of Cu_2SnS_3 Nanoparticles forPlanar Heterojunction Solar Cells
    3.1 Introduction
    3.2 Experimental section
        3.2.1 Chemicals
        3.2.2 CTS film preparation
        3.2.3 Characterizations and Instruments
    3.3 Results and discussion
        3.3.1 CTS film characterization
        3.3.2 Solar cells
            3.3.2.1 Optimization of solar cell structure
            3.3.2.2 T_a-dependence of device performance
    3.4 Conclusion
Chapter 4 A Solid-state Cd-diffusion Strategy to Prepare Bulk Cu_2CdSnS_4 Films forSolar Cells
    4.1 Introduction
    4.2 Experimental section
        4.2.1 Chemicals
        4.2.2 Film preparation
        4.2.3 Solar cell preparation
        4.2.4 Characterizations and Instruments
    4.3 Results and discussion
        4.3.1 CCTS film formation
            4.3.1.1 Effects of CTS film thickness
            4.3.1.2 Effects of sulfurization temperature
            4.3.1.3 Chemical state and optical property of bulk CCTS film
        4.3.2 Solar cells
    4.4 Conclusion
Chapter 5 Preliminary Study of Solution-processed Bulk Cu_2ZnSnS_4 Films forSolar Cells
    5.1. Introduction
    5.2 Experimental section
        5.2.1 Chemicals and materials
        5.2.2 Bulk CZTS film preparation
        5.2.3 Solar cell preparation
        5.2.4 Characterizations
    5.3 Results and discussion
        5.3.1 FTO/CZTS film characterization
        5.3.2 FTO/TiO_2/CZTS film characterization
        5.3.3 Solar cells
    5.4 Conclusion
Chapter 6 Main conclusions and outlook
References
Acknowledgements
Publications



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