【摘 要】
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Herein,high-quality n-ZnO film layer on c-sapphire and well-crystallized tetragonal p-BiOCl nanoflakes on Cu foil are prepared,respectively.According to the abs
【机 构】
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Department of Materials Science, Fudan University, Shanghai 200433, China;Department of Physical Sci
论文部分内容阅读
Herein,high-quality n-ZnO film layer on c-sapphire and well-crystallized tetragonal p-BiOCl nanoflakes on Cu foil are prepared,respectively.According to the absorption spectra,the bandgaps of n-ZnO and p-BiOCI are confirmed as ～3.3 and ～3.5 eV,respectively.Subsequently,a p-BiOCl/n-ZnO heterostructural photodetector is constructed after a facile mechanical bonding and post annealing process.At-5 V bias,the photocurrent of the device under 350 nm irradiation is ～800 times higher than that in dark,which indicates its strong UV light response characteristic.However,the on/off ratio of In-ZnO-In photodetector is ～20 and the Cu-BiOCl-Cu photodetector depicts very weak UV light response.The heterostructure device also shows a short decay time of 0.95 s,which is much shorter than those of the devices fabricated from pure ZnO thin film and BiOCl nanoflakes.The p-BiOCl/n-ZnO heterojunction photodetector provides a promising pathway to multifunctional UV photodetectors with fast response,high signal-to-noise ratio,and high selectivity.
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