Graphene-Skeleton Heat-Coordinated and Nanoamorphous-Surface-State Controlled Pseudo-Negative-Photoconductivity of Tiny SnO₂ Nanoparticles.

Authors :: Ding L
Liu N
Li L
Wei X
Zhang X
Su J
Rao J
Yang C
Li W
Wang J
Gu H
Gao Y
Source :: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2015 Jun 17; Vol. 27 (23), pp. 3525-32. Date of Electronic Publication: 2015 May 07.
Publication Year :: 2015
Abstract: SnO2 nanoparticles display a pseudo-negative-photoconductivity (PsdNPC) effect, which shows that their resistance increases under light irradiation via a heating effect. The PsdNPC originates from intensive electron scattering of the nanoamorphous surface state of the SnO2 nanoparticles, resulting in a small inner current and a large absorption of moisture, leading to a large surface current. Graphene as the inner skeleton can shorten the response and recovery times.<br /> (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

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