General observation of the memory effect in metal-insulator-ITO structures due to indium diffusion
Publication in refereed journal


Times Cited
Web of Science8WOS source URL (as at 24/10/2020) Click here for the latest count
Altmetrics Information
.

Other information
AbstractResistive random access memory (RRAM) devices based on metal oxides, organic molecules and inorganic nanocrystals (NCs) have been studied extensively in recent years. Different memory switching mechanisms have been proposed and shown to be closely related to the device architectures. In this work, we demonstrate that the use of an ITO/active layer/InGa structure can yield nonvolatile resistive memory behavior in a variety of active materials, including polymers, organic small molecules, and colloidal NCs. Through the electrode material and thickness-dependent study, we show that the ON state of the devices is associated with filamentary conduction induced by indium diffusion from the ITO electrode, occurring mostly within around 40-50 nm from the ITO/active layer interface. A negative differential resistance (NDR) regime is observed during transition from the ON to OFF state, and is explained by the space charge limited current (SCLC) effect due to hole injection at the ITO/active layer interface. Our study reveals the impact of indium diffusion at the ITO/active layer interface, an important factor that should be taken into consideration when designing thin printed RRAM devices.
All Author(s) ListWu XJ, Xu HH, Wang Y, Rogach AL, Shen YZ, Zhao N
Journal nameSemiconductor Science and Technology
Year2015
Month7
Day1
Volume Number30
Issue Number7
PublisherIOP PUBLISHING LTD
ISSN0268-1242
LanguagesEnglish-United Kingdom
Keywordsindium diffusion; memory; metal/insulator/ITO
Web of Science Subject CategoriesEngineering; Engineering, Electrical & Electronic; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Condensed Matter

Last updated on 2020-25-10 at 02:03