Robust switching characteristics of CdSe/ZnS quantum dot non-volatile memory devices

Literature Information

Publication Date 2013-05-10
DOI 10.1039/C3CP50216C
Impact Factor 3.676
Authors

V. Kannan, J. K. Rhee


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Abstract

In this paper we report Al/CdSe–ZnS core–shell quantum dot/AlOx/CdSe–ZnS core–shell quantum dot/ITO based non-volatile resistive memory devices with an ON/OFF ratio of ∼1000. The facile solution processed device exhibited excellent endurance characteristics for 200 000 switching cycles. Retention tests showed good stability for over 20 000 s and the devices are reproducible. A memory operating mechanism is proposed based on charge trapping–detrapping in core–shell quantum dots with AlOx acting as a barrier leading to Coulomb blockade. I–V characteristics of a three terminal device fabricated with the additional terminal wired-out from the middle AlOx layer supports the proposed charge trapping mechanism.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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