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An ultraviolet photo-detector based on TiO2/water solid-liquid heterojunction
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10.1063/1.3671076
/content/aip/journal/apl/99/25/10.1063/1.3671076
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/25/10.1063/1.3671076
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) Schematic device structure with a top-view and a cross-section view of the SLHJ UV-PD.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Incident light depended current-voltage (I-V) characteristics are measured at applied bias from −1 to 1 V and exposed to 365 nm UV-light irradiation with light intensities varied from 22.2 to 479 μW (0.113 to 2.440 mW/cm2). In addition, the individual dark I-V curve is inserted. (b) Incident light depended current-time (I-T) characteristics of the SLHJ-PD are measured at 0 V bias and exposed to 365 nm UV-light on/off switching irradiation with light intensities varied from 48 nW to 22.2 μW (0.244 μW/cm2 to 0.113 mW/cm2). The dark current is about 23 pA on average. (c) Photocurrent (square) and photosensitivity (triangle) versus incident light intensity plots of the SLHJ-PD are measured at 0 V bias, with 365 nm UV-light irradiation. The incident UV-light intensities are varied from 48 nW to 479 μW (0.244 μW/cm2 to 2.440 mW/cm2).

Image of FIG. 3.
FIG. 3.

Photoresponse spectrum of the SLHJ UV-PD is measured at 0 V bias. The UV-visible transmittance spectra for an FTO-glass substrate (solid line) and 50-nm-thick TiO2 film coated on FTO-glass (dash line) sample are shown in the insert.

Image of FIG. 4.
FIG. 4.

(Color online) Schematic energy band diagram and working principles for the SLHJ UV-PD.

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/content/aip/journal/apl/99/25/10.1063/1.3671076
2011-12-19
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An ultraviolet photo-detector based on TiO2/water solid-liquid heterojunction
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/25/10.1063/1.3671076
10.1063/1.3671076
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