Electronic and ionic conduction in ligand-free lead selenide colloidal quantum dots
- Authors
- Park, Byoungnam
- Issue Date
- Jun-2020
- Publisher
- ELSEVIER
- Citation
- RESULTS IN PHYSICS, v.17
- Journal Title
- RESULTS IN PHYSICS
- Volume
- 17
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/11684
- DOI
- 10.1016/j.rinp.2020.103113
- ISSN
- 2211-3797
- Abstract
- We fabricated a ligand-free lead selenide (PbSe) colloidal quantum dot (CQD) film and probed its electrical properties using a field-effect transistor (FET) at low temperature. The contribution of the ionic conduction to the electrical properties in the PbSe CQD film became significant after ligand removal using ammonium sulfide [(NH4)(2)S], evidenced by temperature-dependent FET mobility, threshold voltage, and current hysteresis depending on gate scan direction. The enhanced FET mobility and increased carrier concentration at a lower temperature are attributed to reduced ionic conduction, suppressing the gate electric field screening at the PbSe/SiO2 interface.
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Collections - College of Engineering > Materials Science and Engineering Major > 1. Journal Articles
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