School of Materials Science and Engineering

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QI Junjie

Professor at Department of Materials Physics and Chemistry


Jinwu Building, Room 314

Available to act as adviser for international graduate student: Yes


Dr. Junjie Qi is the full Professor of University of Science & Technology Beijing, China. She received her Ph.D. degree from Department of Materials Science at University of Science & Technology Beijing in 2002. From Jan. 2003 to Dec. 2004, she had been with the Tsinghua University, where she was a Post-Doctoral researcher. She joined the Device Research Laboratory in Electrical Engineering Department at University of California, Los Angeles as a visiting scholar through Dec. 2013 to Dec. 2014. She is the author of more than 100 publications including “Nature Communications”, “Advanced Materials”, “Nano Letters”. 

Research Interests

-New semiconductor nanomaterials and devices

-Electronic and opto-electronic devices of low-dimensional materials

-Nano-energy  materials and devices

-Service behavior and nanodamage in nanomaterials and devices

Published Research (English only)

[1]  Junjie Qi, Yann-Wen Lan, et al. Piezoelectric effect in chemical vapour deposition-grown atomic-monolayer triangular molybdenum disulfide piezotronics [J]. Nature Communications, 2015, 6: 7430.

[2]  Junjie Qi, Xiaofeng Hu, et al. A Self-powered ultraviolet detector based on a single ZnO microwire/p-Si film with double heterojunctions [J]. Nanoscale, 2014, 6: 6025-6029.

[3]  Junjie Qi, Kui Zhang, et al. Dissolving behavior and electrical properties of ZnO wire in HCl solution [J]. RSC Advances, 2015, 5: 44563.

[4]  Shengnan Lu, Junjie Qi, et al. Piezotronic Interface Engineering on ZnO/Au-Based Schottky Junction for Enhanced Photoresponse of a Flexible Self-Powered UV Detector [J]. ACS Applied Materials & Interfaces, 2014, 6(16): 14116.

[5]  Junjie Qi, Yue Zhang, Yunhua Huang, Qingliang Liao, and Juan Liu, Doping and defects in the formation of single-crystal ZnO nanodisks,Appl. Phys. Lett., 2006, 89, 252115

[6]  Yaxue Zhao, Junjie Qi, Feng Li, Kui Zhang, Xin Li, Yue Zhang. Local irradiation effects of one-dimensional ZnO based self-powered asymmetric Schottky barrier UV photodetector. Materials Chemistry and Physics, 2015, 10

[7]  Xin Li, Junjie Qi, Qi Zhang, Zengze Wang, Shengnan Lu and Yue Zhang,Investigation of electron beam detection properties of ZnO nanowire based back-to-back double Schottky diode,RSC Adv., 2014, 4, 12743

[8]  Xin Li, Junjie Qi, Qi Zhang, and Yue Zhang,Bias-tunable dual-mode ultraviolet photodetectors for photoelectric Tachometer,Appl. Phys. Lett., 2014,104, 041108 

[9]  Wenhua Wang, Junjie Qi, Qinyu Wang, Yunhua Huang, Qingliang Liao and Yue Zhang,Single ZnO nanotetrapod-based sensors for monitoring localized UV irradiation,Nanoscale, 2013, 5, 5981

[10] Wenhua Wang, Junjie Qi, Zi Qin, Qinyu Wang, Xu Sun, Yue Zhang, Transport Property Tuned by Gate Irradiation in ZnO Nanotetrapod Devices, J. Phys. Chem. C, 2012, 116 (23): 12397-12400

[11] Shengnan Lu, Junjie Qi, ZengZe Wang, Pei Lin, Shuo Liu and Yue Zhang,Size effect in a cantilevered ZnO micro/nanowire and its potential as a performance tunable force sensor,RSC Advances, 2013, 3, 19375

[12] Zengze Wang, Junjie Qi, XiaoQin Yan, Qi Zhang, Qinyu Wang, Shengnan Lu, Pei Lin, Qingliang Liao, Zheng Zhang and Yue Zhang,A self-powered strain senor based on a ZnO/PEDOT:PSS hybrid structure,RSC Advances,2013, 3, 17011-17015

[13] Zengze Wang, Junjie Qi, Shengnan Lu, Peifeng Li, Xin Li, and Yue Zhang,Enhancing sensitivity of force sensor based on a ZnO tetrapod by piezo-phototronic effect,Appl. Phys. Lett., 2013, 103, 143125

[14] Qi Zhang, Junjie Qi, Xin Li, Fang Yi, Zengze Wang, and Yue Zhang, Electrically pumped lasing from single ZnO micro/nanowire and PEDOT: PSS heterostructures, Appl. Phys. Lett., 2012, 101: 043119

[15] Qi Zhang, Junjie Qi, Xin Li and Yue Zhang, Diameter-dependent internal gain in ZnO micro/nanowires under electron beam irradiation, Nanoscale, 2011, 3, 3060-3063

[16] Qi Zhang, Junjie Qi, Yunhua Huang, Xin Li, Yue Zhang, Negative differential resistance in ZnO nanowires induced by surface state modulation, Materials Chemistry and Physics, 2011, 131(1-2), 258-261

[17] Kai Sun, Junjie Qi, Qi Zhang, Ya Yang, Yue Zhang, A novel logic switch based on individual ZnO nanotetrapodes, Nanoscale, 2011, 3: 2166-2168

[18] Ning Ye, Junjie Qi, Zi Qi, Xiaomei Zhang, Ya Yang, Jing Liu, Yue Zhang, Improvement of the performance of dye-sensitized solar cells using Sn-doped ZnO nanoparticles, J. Power Sources, 2010, 195: 5806-5809

[19] Ya Yang, Junjie Qi, Wen Guo, Yousong Gu, Yunhua Huang and Yue Zhang, Transverse piezoelectric field-effect transistor based on single ZnO nanobelts, Phys. Chem. Chem. Phys., 2010, 12

[20] Ya Yang, Wen Guo, Xueqiang Wang, Zengze Wang, Junjie Qi, Yue Zhang, Size Dependence of Dielectric Constant in a Single Pencil-Like ZnO Nanowire, Nano Lett., 2012, 12: 1919-1922