Personal profile
Author IDs
ORCID iD: 0000-0003-0788-4905
Scopus Author ID: 35194670000
Google Scholar Profile: xri7gy0AAAAJ
Impact
Qualifications (Brief)
PhD University of Toronto, Canada
MPhil, BEng The Chinese University of Hong Kong
Biography
Dr Stephen Sai Wing Tsang is an assistant professor in the department of Physics and Materials Science at the City University of Hong Kong. Dr Tsang received his PhD in 2009 in the Materials Science and Engineering Department at the University of Toronto, Canada. His PhD was focused on developing experimental approaches and models to investigate the charge carrier transport across organic heterojunction, under the supervision of Prof. Zheng Hong Lu. After his PhD, he joined the National Research Council (NRC) Canada as an Assistant Research Officer to develop solution processed quantum dots for photovoltaic applications. At 2011, he joined Prof. Franky So’s group at the University of Florida as a Postdoc Fellow to develop high efficiency polymer solar cells and investigate the corresponding device physics. Before joining CityU, he joined the Nano and Advanced Materials Institute (NAMI) in Hong Kong as an Assistant Technical Manager in the Energy division to develop CIGS and a Si photovoltaic cells.
Dr Tsang has published over 60 peer-review journals including Nature Photonics, Adv. Mater., Adv. Energy Mater., Adv. Funct. Mater., Phys. Rev. B, and Appl. Phys. Lett. etc.
Position(s) Available
Research staff position(s)
1. Postdoctoral Fellow (x1) - Posted on Jan. 2017
Duties:
- To develop bule emitting Quantum Dot Light Emitting Diodes (QDLEDs)
- To investigate the degradation mechanism in QDLED.
- To setup a quantum efficiency measurement system
- To work closely with teammate to develop the project.
Requirements:
- Doctoral degree in Electronics Engineering, Optoelectronics Engineering, Electrical Engineering, Physics, Chemistry, Materials Science or related disciplinary subjects, focusing on thin film semi-conductor materials/devices related technologies;
- Experiences with thin film devices fabrications and vacuum process.
- Experiences with electronic device characterizations.
- Experiences with optical setup.
- Experience in team management.
2. Research Assistant (x1) - Posted on Jan 2017
Duties:
- To investigate the charge transfer process in organic and perovskite solar cells
- To setup a quantum efficiency measurement system
- To work closely with teammate to develop the project.
Requirements:
- Bachelor/Master degree in Electronics Engineering, Optoelectronics Engineering, Electrical Engineering, Physics, Chemistry, Materials Science or related disciplinary subjects, focusing on thin film semi-conductor materials/devices related technologies;
- Experiences with instrumentation (Labview)
- Experiences with thin film characterizations.
- Experiences with optical setup.
- Be a good team player in carrying out collaboration project;
Research Interests/Areas
Advanced materials for photovoltaic application
Solution processed electronic materials
Semiconductor device physics
Spectroscopy techniques
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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SDG 2 Zero Hunger -
SDG 7 Affordable and Clean Energy -
SDG 9 Industry, Innovation, and Infrastructure -
SDG 13 Climate Action
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Collaborations from the last five years
Research output
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A Bimolecular Co-Anchoring Strategy for Constructing Hydrogen Networks to Stabilize Perovskite Solar Cells
Wang, Y., Zhang, L., Li, K., Wang, Y., Tao, Y., Lu, X., Tsang, S., Kuo, H.-C., You, J., Jen, A. K. Y. & Liu, S. F., 5 Jan 2026, (Online published) In: Advanced Energy Materials. 11 p., e04844.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
1 Link opens in a new tab Citation (Scopus) -
A Perspective on Commercializing Perovskite Solar Cells: Unlocking Opportunities in Niche Applications
Wu, X., Xiong, G., Yue, Z., Chen, R., Tsang, S.-W. & Cheng, Y., 3 Mar 2026, In: Small. 22, 13, e11874.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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In-Situ Photoluminescence for Perovskite Crystallization: Bridging Mechanistic Insights and Device Engineering Control
Yang, H. (Co-first Author), Guo, H. (Co-first Author), Wang, Y. (Co-first Author), Chen, R., Tsang, S.-W. & Cheng, Y., 8 Feb 2026, (Online published) In: Advanced Materials. 55 p., e18643.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Polarize the Solvent to Regulate the Intermediate Phase and Dynamic Crystallization of Perovskite Films
Zhang, Z. (Co-first Author), Wang, Y. (Co-first Author), Wang, W. (Co-first Author), Huang, Y. (Co-first Author), Ouyang, S., Sun, Y., Wang, F., Zhou, X., Xing, G., So, S. K., Xing, G., Hu, H., Cai, S., Tsang, S.-W. & Wu, T., 13 Jan 2026, (Online published) In: Advanced Materials. 12 p., e19793.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open Access -
Recent Advances on Self-Powered Metal Halide Perovskite Photodetectors
Xiong, G., Li, X., Guo, H., Li, M., Tsang, S.-W. & Cheng, Y., Feb 2026, In: EcoEnergy. 4, 1, 27 p., e70031.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open Access
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TDG(CityU): Fostering Innovation and Collaborative Learning through an Off-Campus Laboratory Approach
TSANG, S. W. (Principal Investigator / Project Coordinator)
1/03/26 → …
Project: Research
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NSFC-GP-SRI: 电吸收光谱法探究Y系列非富勒烯受体中分子结构与电荷转移特性的关系
TSANG, S. W. (Principal Investigator / Project Coordinator)
1/01/25 → …
Project: Research
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GDBAB-NSF-HK: 探究高性能錫基鈣鈦礦材料的成核結晶機制以拓寬其工藝窗口
LI, K. (Principal Investigator / Project Coordinator) & TSANG, S. W. (Principal Investigator / Project Coordinator)
1/01/25 → …
Project: Research
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GRF: Development of an In-situ Defects Measurement to Investigate the Degradation in Multiple-ion Composite Perovskite Solar Cells
TSANG, S. W. (Principal Investigator / Project Coordinator)
1/01/23 → …
Project: Research
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ResCtrs: College of Engineering Research Centre of Super-Diamond and Advanced Films (COSDAF)
ZHANG, W. (Principal Investigator / Project Coordinator), CHI, Y. (Co-Investigator), HONG, G. (Co-Investigator), JEN, A. (Co-Investigator), LEE, C. S. (Co-Investigator), LI, Y. (Co-Investigator), LIU, B. (Co-Investigator), LY, T. H. (Co-Investigator), SHI, P. (Co-Investigator), SUN, H. (Co-Investigator), TSANG, S. W. (Co-Investigator), YIP, H. L. (Co-Investigator), ZAPIEN, J. A. (Co-Investigator), ZENG, Z. (Co-Investigator), ZHANG, Q. (Co-Investigator) & ZHU, Z. (Co-Investigator)
1/11/97 → …
Project: Research
Press/Media
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Thirty-two outstanding scientists at CityUHK recognised by national funding; Scholar from the Department of Biomedical Engineering receives highest honour for young scientists
XU, C., FU, B., HOU, C., WANG, W., CHU, J.-E., QIN, Y., HOU, J., DONG, M., MA, J., ZHANG, Z., ZHANG, G., JIAO, D., YIN, X., CHEN, L., WU, Y., WU, G., SU, W., XU, J., HE, J., LI, N., ZHU, F., ZHAO, L., DUAN, P., XU, Y. J., LIU, C., LIU, M., CUI, L., KWOK, C. K., TSANG, S. W., ZHANG, Q., WANG, X. S. & WU, W.
25/09/24
1 item of Media coverage
Press/Media: Press / Media
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Recent development in Polymer and Perovskite Photovoltaics
TSANG, S. W. (Speaker)
22 Sept 2018 → 24 Sept 2018Activity: Talk/lecture or presentation › Talk/lecture
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18% High-Efficiency Air-processed Perovskite Solar Cells Made in a Humid Atmosphere of 70% RH
TSANG, S. W. (Speaker)
21 Jun 2017Activity: Talk/lecture or presentation › Presentation
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Journal of Nanomaterials (Journal)
TSANG, S. W. (Guest Editor)
Nov 2013 → 2014Activity: Publication peer-review and editorial work (RGC: 61) › RGC 61 - Journal editor