Qingfeng Lin, PhD

WORK EXPERIENCE

University of Southern California                                                                Los Angeles, California

Postdoctoral Scholar                                                                                                Sep. 2015 – present

Principle Investigator: Prof. Rehan Kapadia; Collaborator: Prof. Daniel Dapkus

• Grow low-cost large-area III-V semiconductors via thin-film VLS technique using CVD furnace

• Characterize III-V thin films with photoluminescence spectra, SEM, UV-Vis spectra, XRD, etc.

• Explore hot electron transfer mechanism through electrochemical hot electron transistor

• Design nanoscale field emission devices with ultra-low turn-on voltages (<1 V)

• Demonstrate indium phosphide synaptic devices for scalable neuromorphic computing

• Fabricate sharp tip Si arrays by ICP-RIE and KOH etching for field emitters

• Collaborate with MOCVD growers to fabricate photodetectors and solar cells

• Super user of ALD for Al2O3 and TiO2 deposition

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The Hong Kong University of Science and Technology                                Kowloon, Hong Kong

Postdoctoral Fellow                                                                                           Aug. 2014 – Aug. 2015

Principle Investigator: Prof. Zhiyong Fan; Collaborator: Prof. Key May Lau, Prof. Hoi Sing Kowk

• Fabricated flexible a-Si:H solar cells on nanostructured polyimide substrates with PECVD system, obtaining 7.06% efficiency, which outperformed the flat substrates by 94%

• Gained higher production yield, improved flexibility and robustness with the nanotextured cells

• Partnered with MOCVD researchers to fabricate III-V quantum dot lasers

• Mentored 10+ junior researchers, who later enrolled in MIT, Harvard, UC Berkeley, etc.

The Hong Kong University of Science and Technology                                Kowloon, Hong Kong

PhD Researcher                                                                                                   Aug. 2010 – Jul. 2014

Principle Investigator: Prof. Zhiyong Fan; Collaborator: Prof. Key May Lau, Prof. Hoi Sing Kowk

• Fabricated 1000+ a-Si:H solar cells with three-chamber PECVD system, achieving 7.58% efficiency contributed by the superior light trapping capability of inverted nanocone substrates

• Invented low-cost self-cleaning anti-reflection films, enhancing the daily energy output of high-efficiency CdTe solar cells by 7%

• Developed ordered nanostructures via electrochemical anodization and nanoimprint

• Created periodic Si arrays by ASML stepper and RIE as nanoimprint molds

• Presented research achievements at international conferences all over the world

• Devised a UV-Vis system, which reduced budget by 70% and contributed to 5+ groups

• Set up a quantum efficiency measurement system and a solar simulator

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University of Science and Technology of China                                                            Hefei, China

Undergraduate Researcher                                                                                    Jun. 2008 – Jul. 2010

Principle Investigator: Prof. Bin Li, Prof. Hui Li

• Built a team of 5 members for 2008RoboGame at USTC, won final eight in 96 teams

• Designed a mainboard, an SPI programmer, and a telecontrol board for the robot

• In charge of program debugging and maintenance of the robot

• Designed defect-tolerant logic mapping for cross-based nanoarchitecture with C Language

• In charge of the algorithm and a dialog based interface for an eye tracking system