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In this work, a SnO 2 bilayers photodiode device is designed, which consists of a thin SnO 2 photocurrent generation layer and a SnO 2 thick layer on the glass substrate. The SnO 2 photocurrent generation layer with high oxygen vacancy concentration is intentionally prepared. With annealing in oxygen ambient, an electrical potential would be built in the surface space charge region in the thin SnO 2 photocurrent generation layer, which would drive the photocarriers down to and flow in the photocarrier transportation layer, i.e., the high-mobility SnO 2 thick film on the glass substrate. The designed SnO 2 bilayers photodiode device could enhance photocurrent generation and resolution for the SnO 2 -based UV-photodetectors. It is concluded that the width of surface space charge region is the key factor for the enhancement of lifetime of photocarriers and photocurrent generation of the current SnO 2 bilayers photodiode. Based on the present experimental results, the width of the surface space charge region is expected to be nearly or less than 3 nm. Moreover, in this work, a theoretical model is developed to calculate the width of the surface space charge region. The calculated width of the surface space charge region (3.26 nm) is close enough to support the present experimental observation.
|Journal||Advanced Electronic Materials|
|State||Published - Apr 2019|
- oxygen adsorption
- surface space charge
FingerprintDive into the research topics of 'Experiment and Theoretical Calculation of the Surface Space Charge Region Effect on Photocurrent Generation of SnO 2 Bilayer Photodiode Devices'. Together they form a unique fingerprint.
- 3 Finished
Low Temperature Cu/Pd Diffusion Bonding Development and Applying Cu-Pd Bonding on Thin-Gan Led Packaging Process(3/3)
1/08/18 → 31/07/19
Effect of LED Die-Attachment on Stress in GaN Eip-Layers and Anelastic Behavior(3/3)
1/08/17 → 31/07/18
Development of Cu Recycling for Micro Cu Powders Used in Electronics-Grade Cu Slurry( I )
1/06/17 → 31/05/18