InP Thin Film Nanophotonics Sep. 2015 – present
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Deposit Mo, indium and SiO2 on nanotextured substrate
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Grew InP thin film nanophotonics in thermal CVD via thin-film vapor-liquid-solid technique
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Characterized the grown InP films with PL spectra, SEM, UV-Vis spectra, XRD, etc.
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Simulated optical properties of the InP thin film nanophotonics with Lumerical FDTD
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Electrochemical Hot Electron Transistors Dec. 2015 – present
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Fabricate electrochemical hot electron devices in clean room
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Characterize Schottky/Ohmic contacts in probe station with semiconductor device analyzer
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Measure hot electron performance in acidic electrolyte with Potentiostat and Keithley
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Simulate the voltage distribution along the device with Sentaurus
Nanoscale Field Emission Transistors Jan. 2017 – present
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Design nanoscale FETs with e-beam lithography
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Apply multiple angular evaporations to achieve sub-10 nm source/drain length
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Perform field emission measurements with semiconductor device analyzer
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Investigate electron emission by applying gate potential in vacuum system
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Flexible nanostructured solar cells Jun. 2013 – Aug. 2015
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Obtained inverted nanocone template via multistep anodization process
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Spin coated polyimide solution on the template, baked it in thermal CVD
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Fabricated amorphous Si (a-Si) thin film solar cells on the nanostructured plastic substrates
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Characterized energy conversion efficiency of the flexible solar cells with solar simulator
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Investigated light absorption efficiency, flexibility, and robustness of the flexible solar cells
Three-dimensional anti-reflection nanocone film Jul. 2012 – Sep. 2013
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Fabricated inverted nanocone substrate via multistep anodization process
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Achieved three-dimensional nanocone film with the inverted nanocone substrate as a template
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Attached the anti-reflection nanocone film to high-efficiency CdTe thin film solar cells directly
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Characterized the device efficiency with solar simulator
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Analyzed the optical properties with UV-Vis system and Lumerical FDTD simulations
Efficient photon management with periodic nanostructures Aug. 2010 – Dec. 2012
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Designed mask with L-Edit, fabricated Si mold by photolithography or EBL
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Built anodization systems consist of power supply, chiller, sample holder, etc.
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Grew periodic nanostructures via anodization process in conjunction with nanoimprint
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Observed the morphologies of the grown nanostructures with SEM
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Deposited a-Si thin films on the nanostructures with PECVD or LPCVD
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Characterized optical features of the periodic nanostructures in UV-Vis system
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Simulated optical properties of the periodic nanostructures with Lumerical FDTD