Quantitative characterization of the long-term charge storage of a ZnO-based nanorod array film through persistent photoconductance.

ABSTRACT: The persistent nature of the increased conductivity upon removal of incident illumination, described by the term persistent photoconductivity (PPC), in ZnO films is sensitive to their defect states. PPC can be viewed as a process of charge storage with relevant defects. To evaluate charge storage quantitatively, in this work, some thought-provoking characteristic quantities were derived from a photocurrent-time curve acquired by testing the photoelectric properties of ZnO under on and off UV illumination. Q _uo was defined as the obtained charge number per unit voltage during the light-on phase, while Q _us was defined as the storage charge number during the light-off phase. η was acquired by dividing Q _us by Q _uo

SUBMITTER: Lu L 

PROVIDER: S-EPMC9080277 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature