Research

Fabrication

• optoelectrical devices (solar cell, photodetectors, and light emitting diodes) and flexible devices 

• high vacuum deposition and thin film processing (spin-coating, blade-coating) 

• graphene (molecular templating growth) integrated devices

Characterization

• POM, various AFMs (EFM, SKPM, C-AFM, PC-AFM), SEM and TEM

• RAMAN (FT-IR), UV-vis, PL, TRPL, and PL mapping

• SIMS and ToF-SIMS

• Contact angle measurement and profilometry

Measurements

• Optoelectrical measurement for solar cells (IV characteristics, EQE, impedance spectroscopy, VOC-decay, TPV/TPC and MPP) 

• Optoelectrical measurement for photodetector (IV characteristics, EQE, impedance spectroscopy, dynamics ranges, noise spectra analysis)  

• Electrical measurement for transistors (transfer curve, out-put curve, 4 point-probe, and prove station technique)

• Optical measurement: optical transmission & absorption, electroluminescence, photoluminescence, time-resolved photoluminescence, photo-induced absorption, transient absorption, external quantum efficiency.

Synchrotron based X-ray studies

• XRD, 2D-GIWAXS/GISAXS and XRR

• XPS, UPS and NEXAFS

Femtosecond Laser Process

• Laser direct writing (ablation, LIPSS, expansion) for photonic structures

Simulation

• Molecular structure and ESP calculation based on density functional theory (DFT)

• Optical simulation

• Software: MATLAB, Python, Lumerical FDTD, Origin, and Igor.

illustration (2D/3D modeling): Schematics, figures, various image designs, Journal cover works 

Basic synthesis

Wet etching and patterning device application