Self-assembly, stability, and photoresponse of PbS quantum dot films capped with mixed halide perovskite ligands

Samaneh Aynehband,Maryam Mohammadi,Rana Poushimin,Mahdi Hasanzadeh Azar,Jean-Michel Nunzi,Abdolreza Simchi

Materials Research Bulletin（2022）

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摘要

•Oleic acid-capped PbS nanocrystals were drop casted on graphene/Si/SiO2 substrates.•OA-ligands were substituted by I−/Br− inorganic-organic perovskite ligands.•TEM shows nanocrystal fusion with the FAPbI3 perovskite.•Substitution of I− by Br− ions results in more homogeneous and less defectuous layers.•Photoresponse and solar stability of p-channel graphene-based transistors are improved with Br-rich ligands.

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关键词

Colloidal quantum dot,Inorganic-organic perovskite,Lead sulfide,Nanofilm,Graphene-based field effect transistor,Charge transport

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