High temperature electrical conductivity of nano-structured ZnO

Sangtae Kim

doi:10.1117/12.631007

17 November 2005 High temperature electrical conductivity of nano-structured ZnO

Sangtae Kim

Proceedings Volume 6008, Nanosensing: Materials and Devices II; 60080D (2005) https://doi.org/10.1117/12.631007
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

Both ac and dc conductivities of nominally pure nanocrystalline ZnO ceramics with grain size of ~ 40 nm were measured as a function of oxygen partial pressure and temperature, and compared with coarsened microcrystalline samples (grain size of ~ 5 μm). Nanocrystalline ceramics showed intrinsic bulk properties which turned into extrinsic behavior on coarsening. This is attributed to extreme impurity segregation into grain boundary core in nanocrystalline ceramics owing to the markedly enhanced interface-to-volume ratio. Nonetheless the blocking effect (Schottky barriers) of the grain boundaries in the nanocrystalline sample was negligible compared to that in the coarsened material due to the extreme dilution of the interfacial traps. Investigations on dopant behavior in ZnO nanowire bridges based on high temperature electrical measurements are currently under progress.

Citation Download Citation

Sangtae Kim "High temperature electrical conductivity of nano-structured ZnO", Proc. SPIE 6008, Nanosensing: Materials and Devices II, 60080D (17 November 2005); https://doi.org/10.1117/12.631007

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available