Property engineering through nanomaterial chemical transformation of colloidal nanocrystal thin films

Md Ashraf Hossain, Sanghyun Jeon, Junhyuk Ahn, Junsung Bang, Ho Kun Woo, Shihab B. Hafiz, Dong Kyun Ko, Soong Ju Oh

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Herein, we introduce a unique nanomaterial chemical transformation (NCT) process whereby selenium (Se) anion is introduced to colloidal silver (Ag) nanocrystals (NCs) to create nanostructured silver selenide (Ag2Se). We present a complete suite of material characterizations, including chemical, structural, optical, and electrical characterizations to understand the details of the transformation process. The Ag2Se thin-films obtained through the NCT process exhibit degenerately-doped n-type semiconductor characteristics with high carrier mobility. We discuss the chemical mechanism that drives the material transformation and elucidates the origin of doping in these semiconducting thin-films. We also demonstrate the robustness of Ag2Se thin-films toward mechanical strain and temperature cycling stress for flexible device applications. We believed that the NCT process demonstrated here is of wide applicability to other material systems which can open up new avenues for solid-state chemistry and device engineering research.

    Original languageEnglish
    Article number145721
    JournalApplied Surface Science
    Volume513
    DOIs
    Publication statusPublished - 2020 May 30

    Bibliographical note

    Publisher Copyright:
    © 2020 Elsevier B.V.

    Keywords

    • Chemical transformation
    • Metal chalcogenides
    • N-type semiconductor
    • Silver selenide
    • Transport

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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