Property engineering through nanomaterial chemical transformation of colloidal nanocrystal thin films

Document Type

Article

Publication Date

5-30-2020

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.

Identifier

85079850073 (Scopus)

Publication Title

Applied Surface Science

External Full Text Location

https://doi.org/10.1016/j.apsusc.2020.145721

ISSN

01694332

Volume

513

Grant

1809112

Fund Ref

National Science Foundation

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