Haoran Li Email & Phone Number

Hillsboro, Or, Us

Hillsboro, Or

Santa Barbara, California Area

Santa Barbara, California Area

Research into III-N materials grown by MOCVD.• Developed growth techniques for high-quality thick AlGaN films with high Al-compositions fully strained to GaN in GaN/AlGaN/GaN heterostructures.• Explored the impact of various growth conditions on the compositional, morphological and electrical properties of metal- and N-polar AlN films deposited by MOCVD, minimizing the unintentional Ga incorporation and improving the film quality. Epitaxy of (Al,In,Ga)N-based electronic devices by MOCVD.• Design and epitaxy of N-polar AlGaN/GaN HEMT structures for RF power electronic devices, based on which the state-of-the-art performance of 8 W/mm output power with associated power-added-efficiency of 27% was obtained. • Developed and optimized N-polar HEMT structures with GaN/InGaN composite channels leading to successful scaling down of channel thickness to 4 nm, largely increasing the lateral scalability of the devices.• Developed growth processes for N-polar III-N Hot Electron Transistors (HETs).• Developed Si-doped N-polar GaN contacts with a free carrier concentration of 2.2e20 cm-3.

Hangzhou, Zhejiang, China

Surface morphology reconstruction in interferometric measurements of aspheric lenses. • Developed a Matlab program to reconstruct the surface morphology from interference images using Algebraic Reconstruction Techniques (ART).• Explored several methods to eliminate the mounting error of the aspheric lens and developed a Matlab program to correct the mounting error by analyzing the interference images, simplifying the calibration process in the measurement. Prototype development of an infrared-based assistive device for visually-impaired people.

Doctor Of Philosophy - Phd, Electrical And Electronics Engineering

Advisor: Professor Umesh Mishra Dissertation title: New aspect in MOCVD of metal- and N-polar (Al,Ga)N and its device applications

Master'S Degree, Electrical And Electronics Engineering

Bachelor'S Degree, Optical Engineering

Activities and Societies: Red Cross Society in Zhejiang University