白伟

研究方向：

一、窄禁带半导体材料与器件分子束外延（MBE）技术

二、半导体电子/光电子器件工艺与物理，包括晶体管、红外探测器、雪崩器件及新型电子器件

      非常欢迎有半导体、电子信息、光电子或物理等学科背景的青年学子加入课题组！

       E-mail: wbai@ee.ecnu.edu.cn

研究生招生与培养：

      电子科学与技术专业:  博士、直博、硕博和硕士研究生

开授课程：

本科生课程：《光电子学与光子学》《半导体器件物理》《模拟电子技术电路实验》

研究生课程：《半导体材料物理》（2017年 — 2019年）《半导体器件物理》（2022年 —）

主持项目情况：

碲基薄膜光电探测器的范德华外延制备及多场调控研究，国家自然科学基金面上项目（2022.01-2025.12）（在研）

研究领域包括：窄禁带半导体碲镉汞（MCT），红外焦平面探测器材料与器件，分子束外延（MBE）技术，先进半导体电子/光电子器件工艺与物理。经过10多年的研究，建立了原子级平整表面、高性能晶圆碲镉汞材料的批量制备能力；实现了焦平面探测器研制应用；是目前国内唯一能实现晶圆级MCT制备，并持续提升尺寸性能的高校单位。在Adv. Sci., Small, Adv. Opt. Mater., J. Mater. Chem. A, Appl. Phys. Lett., Opt. Lett., Phy. Rev. B, ACS Appl. Nano (Electron.) Mater.等国际著名学术期刊上发表SCI论文100余篇。申请专利8项，授权6项。研究成果已被Chem. Rev., Adv. Mater., Nano Today, NPG Asia Mater., Small Method, AFM, AOM, PRB, APL等期刊引用1600余次，个人H因子为24。主持并完成了国家自然科学基金面上项目（2项）、上海市自然科学基金面上项目、中国科学院知识创新项目与博士后基金（一等）等多项课题，参与了国家重点研发计划（纳米前言）专项课题项目（1项）和多项国家自然科学基金项目（6项）等课题研究。

代表性研究成果：

Hechun Cao, Tao Hu, Jiyue Zhang, Dongyang Zhao, Xuefeng Zhao1, Yan Chen*, Xudong Wang, Jing Yang, Yuanyuan Zhang, Xiaodong Tang*, Wei Bai*, Hong Shen, Jianlu Wang, and Junhao Chu, Electrically Tunable Multiple-Effects Synergistic and Boosted Photoelectric Performance in Te/WSe2 Mixed-Dimensional Heterojunction Phototransistors, Adv. Sci. 2400018, (2024)  

https://doi.org/10.1002/advs.202400018 

Dongyang Zhao, Hanxue Jiao, Chao Chen^*, Yan Chen, Shuang Wang, Hechun Cao, Xudong Wang, Guanghui Yu^*, Wei Bai*, Xiaodong Tang, Jianlu Wang, Junhao Chu, Controllable Photocurrent Generation in Lateral Bilayer MoS2–WS2 Heterostructure, Adv. Optical Mater. 11, 2300709 (2023)

https://doi.org/10.1002/adom.202300709

Jiyue  Zhang, Hechun Cao, Wei Bai*, Dongyang Zhao, Yan Chen, Xudong Wang*, Jing  Yang, Yuanyuan Zhang, Ruijuan Qi, Rong Huang, Xiaodong Tang*, Jianlu Wang  and Junhao Chu, High-sensitivity CdTe phototransistors with response spectrum extended to 1.65 μm, J. Mater. Chem. A, 2022,10, 20837-20846.

https://doi.org/10.1039/D2TA04119G

Hongzhu Wu, Chuanhe Ma, Jiyue Zhang, Hechun Cao, Ruobing Lin, Wei Bai*, Zhiqiang Pan, Jing Yang, Yuanyuan Zhang, Ye Chen*, Xiaodong Tang*, Xudong Wang, Jianlu Wang, and Junhao Chu, High-Performance Photodetectors with an Ultrahigh Photoswitching Ratio and a Very Fast Response Speed in Self-Powered Cu2ZnSnS4/CdS PN Heterojunctions, ACS Appl. Electron. Mater. 3, 4135–4143 (2021).

https://doi.org/10.1021/acsaelm.1c00597

Qin Lian, Lisa Zhou, Jiyue Zhang, Hongzhu Wu, Wei Bai*, Jing Yang, Yuanyuan Zhang, Ruijuan Qi, Rong Huang, Xiaodong Tang*, Jianlu Wang, and Junhao Chu, “Nanometer-Thick Metastable Zinc Blende γ-MnTe Single-Crystalline Films for High-Performance Ultraviolet and Broadband Photodetectors”, ACS Appl. Nano Mater. 3, 12046 (2020).

https://doi.org/10.1021/acsanm.0c02560

J. Y. Zhang, Q. Lian, Z. Q. Pan, Wei Bai*, J. Yang. Y. Zhang, X. D. Tang,* and J. H. Chu, “Spin-phonon coupling and two-magnons scattering behaviors in hexagonal NiAs-type antiferromagnetic MnTe epitaxial films”, J. Raman Spectrosc. 51, 1383 (2020).

https://doi.org/10.1002/jrs.5928

Z. Q. Pan, J. Y. Zhang, Q. Lian, W. Bai*, J. Yang, Y. Y. Zhang, R. J. Qi, R. Huang, X. D. Tang,* and J. H. Chu, “The dependence of optoelectric performance on channel length in photodetectors with MBE CdTe single-crystalline thin films on perovskite SrTiO₃”, Opt. Mater. 109, 110276 (2020).

https://doi.org/10.1016/j.optmat.2020.110276

Qin Lian, Xuanting Zhu, Xudong Wang, Wei Bai*, Jing Yang, Yuanyuan Zhang, Ruijuan Qi, Rong Huang, Weida Hu, Xiaodong Tang,* Jianlu Wang,* and Junhao Chu, “Ultrahigh-Detectivity Photodetectors with Van der Waals Epitaxial CdTe Single-Crystalline Films”, Small 15, 1900236 (2019).

https://doi.org/10.1002/smll.201900236

Xuanting Zhu, Qin Lian, Kai Tang, Wei Bai*, Yanhui Li, Jing Yang, Yuanyuan Zhang, Ruijuan Qi, Rong Huang, Xiaodong Tang* and Junhao Chu, “Epitaxial processing optimization and photoluminescence spectra of CdTe thin films grown on highly dissimilar SrTiO3 (001) by molecular beam epitaxy”, Thin Solid Films, 669, 551 (2019).

https://doi.org/10.1016/j.tsf.2018.11.047

Xuanting Zhu, Qin Lian, Pengzhan Zhang, Wei Bai*, Kai Tang, Liangqing Zhu, Jing Yang, Yuanyuan Zhang, Xiaodong Tang*, and Junhao Chu, “Photoluminescence spectra of the Mn2+ d-d multiplets transitions of zinc-blende MnTe epitaxial films: laser and deuteriumlamp excitation study”, Optics Letters, 43, 5547 (2018).

 https://doi.org/10.1364/OL.43.005547

Kun Song, Xuanting Zhu, Kai Tang, Wei Bai*, Liangqing Zhu, Jing Yang, Yuanyuan Zhang, Xiaodong Tang*, and Junhao Chu, “Molecular beam epitaxial growth, transmittance and photoluminescence spectra of zinc-blende CdTe thin films with high-quality on perovskite SrTiO3(1 1 1) substrates”, Journal of Crystal Growth 485, 41 (2018).

https://doi.org/10.1016/j.jcrysgro.2017.12.045

Xuanting Zhu, Kun Song, Kai Tang, Wei Bai*, Jiawei Bai, Liangqing Zhu, Jing Yang, Yuanyuan Zhang, Ruijuan Qi, Rong Huang, Xiaodong Tang*, and Junhao Chu, “Growth of the metastable zinc-blende MnTe films on highly dissimilar perovskite SrTiO3(001) substrates by molecular beam epitaxy”, Journal of Alloys and Compounds 729, 95 (2017).

https://doi.org/10.1016/j.jallcom.2017.09.134

Kai Tang, Xuanting Zhu, Wei Bai*, Liangqing Zhu, Jiawei Bai, Wenxia Dong, Jing Yang, Yuanyuan Zhang, Xiaodong Tang, and Junhao Chu, “Molecular beam epitaxial growth and optical properties of the CdTe thin films on highly mismatched SrTiO3 substrates”, Journal of Alloys and Compounds 685, 370 (2016).

http://www.sciencedirect.com/science/article/pii/S0925838816315626

Kai Tang, Xuanting Zhu, Liangqing Zhu, Wei Bai*, Jiawei Bai, Wenxia Dong, Jing Yang, Yuanyuan Zhang, Ye Chen, Xiaodong Tang, and Junhao Chu, "Stoichiometry dependence of the optical and minority-carrier lifetime behaviors of CdTe epitaxial films: A low-temperature and time-resolved photoluminescence study", Applied Surface Science 387, 477  (2016). 

http://www.sciencedirect.com/science/article/pii/S016943321631371X

Chao Chen, Kun Song, Wei Bai*, Jing Yang, Yuanyuan Zhang, Pinghua Xiang, Muyang Qin, Xiaodong Tang, and Junhao Chu, “Effect of Nb and more Fe ions co-doping on the microstructures, magnetic, and piezoelectric properties of Aurivillius Bi5Ti3FeO15 phases”, Journal of Applied Physics 120, 214104 (2016).

http://scitation.aip.org/content/aip/journal/jap/120/21/10.1063/1.4971256

Wei Bai*, Chao Chen, Jing Yang, Yuanyuan Zhang, Ruijuan, Qi, Rong Huang, Xiaodong Tang, Chun-gang Duan, and Junhao Chu, “Dielectric behaviors of Aurivillius Bi5Ti3Fe0.5Cr0.5O15 multiferroic polycrystals: Determining the intrinsic magnetoelectric responses by impedance spectroscopy”, Scientific Reports 5, 17846  (2015).

http://www.nature.com/articles/srep17846

Wei Bai*, Wenhao Yin, Jing Yang, Kai Tang, Yuanyuan Zhang, Tie Lin, Xiangjian Meng, Chun-Gang Duan, Xiaodong Tang and Junhao Chu, “Cryogenic temperature relaxor-like dielectric responses and magnetodielectric coupling in Aurivillius Bi5Ti3FeO15 multiferroic thin films”, Journal of Applied Physics 116, 084103 (2014).

http://dx.doi.org/10.1063/1.4893710

J. Liu, W. Bai*, J. Yang, W. F. Xu, Y. Y. Zhang, T. Lin, X. J. Meng, C.-G. Duan, X. D. Tang, and J. H. Chu, “The Cr-substitution concentration dependence of the structural, electric and magnetic behaviors for Aurivillius Bi5Ti3FeO15 multiferroic ceramics”, Journal of Applied Physics 114, 234101 (2013). 

https://doi.org/10.1063/1.4849055

G. Chen, W. Bai*, L. Sun, J. Wu, Q. Ren, W. F. Xu, J. Yang, X. J. Meng, X. D. Tang, C.-G. Duan, and J. H. Chu, “Processing optimization and sintering time dependent magnetic and optical behaviors of Aurivillius Bi5Ti3FeO15 ceramics”, Journal of Applied Physics 113, 034901 (2013).  

http://dx.doi.org/10.1063/1.4775800

W. Bai*, G. Chen, J. Y. Zhu, J. Yang, T. Lin, X. J. Meng, X. D. Tang, C. G. Duan, and J. H. Chu, “Dielectric responses and scaling behaviors in Aurivillius Bi6Ti3Fe2O18 multiferroic thin films”, Applied Physics Letters 100, 082902 (2012).

http://dx.doi.org/10.1063/1.3688033

W. Bai*, Y. Q. Gao, J. Y. Zhu, X. J. Meng, T. Lin, J. Yang, Z. Q. Zhu, and J. H. Chu, "Electrical, magnetic and optical properties in multiferroic Bi5Ti3FeO15 thin films prepared by a chemical solution deposition route”, Journal of Applied Physics 109, 064901 (2011).  

http://dx.doi.org/10.1063/1.3553879

W. Bai*, X. J. Meng, T. Lin, L. Tian, C. B. Jing, W. J. Liu, J. H. Ma, J. L. Sun, and J. H. Chu, “Effect of Fe doping concentration on microstructures, electrical and magnetic properties of Pb(Zr0.5Ti0.5)O3 thin films prepared by chemical solution deposition”, Journal of Applied Physics 106, 124908 (2009).  

http://dx.doi.org/10.1063/1.3273384

W. Bai*, X. J. Meng, J. Yang, T. Lin, Q. Zhang, J. H. Ma, J. L. Sun, and J. H. Chu, “Magnetoelectric, pinning and depinning properties in Pb(Zr0.5Ti0.5)O3/Fe3O4 composite films”, Journal Physics D: Applied Physics 42, 145008 (2009).

http://dx.doi.org/10.1088/0022-3727/42/14/145008

申请/授权国家发明专利情况：

白伟、张继月、唐晓东、王建禄、王旭东，“一种基于深能级缺陷态的CdTe宽光谱探测器及其工作方法”，授权号： CN 114914315 B

白伟、曹贺淳、唐晓东、王建禄、王旭东，“一种晶圆级自支撑CdTe薄膜的制备方法”，申请号：CN202211500128.5