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The adsorption of O<inf>2</inf>/H<inf>2</inf>O molecules on the ZnO nanowire (NW) surface results in the long lifetime of photo-generated carriers and thus benefits ZnO NW-based ultraviolet photodetectors by suppressing the dark current and improving the photocurrent gain, but the slow adsorption process also leads to slow detector response time. Here we show that a thermally evaporated copper phthalocyanine film is effective in passivating surface trap states of ZnO NWs. As a result, the organic/inorganic hybrid photodetector devices exhibit simultaneously improved photosensitivity and response time. This work suggests that it could be an effective way in interfacial passivation using organic/inorganic hybrid structures. © 2013 The Royal Society of Chemistry.

Original publication

DOI

10.1039/c3nr01088k

Type

Journal article

Journal

Nanoscale

Publication Date

21/05/2013

Volume

5

Pages

4162 - 4165