Henan Academy of Sciences | China
Ji Yongqiang is a highly accomplished researcher specializing in nanomaterials, particularly quantum dots and optical devices like QLEDs and solar cells. He is currently serving as an Associate Researcher at the Henan Academy of Sciences and has previously held positions as an Assistant Researcher at Peking University and a PhD student at Xi’an Jiaotong University. His research has earned him recognition for his work in luminescent nanocrystals and perovskite quantum dots, driving innovations in solar cell technology and light-emitting devices.
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📚 Early Academic Pursuits
Ji’s academic journey began at Xi’an University of Technology, where he earned his Bachelor’s in Applied Physics. Under the guidance of Associate Professor Men Shouqiang, he laid a strong foundation in solid-state physics, digital circuits, and quantum mechanics. His interest in material science and semiconductor physics grew during his master’s at Henan University, where he worked with Professor Qian Lei and contributed significantly to condensed matter physics. His doctoral studies at Xi’an Jiaotong University under Professor Wang Minqiang focused on electronic ceramics and device technologies, marking the start of his journey into nanomaterials and optoelectronics.
🔬 Professional Endeavors
Ji’s career has been characterized by exceptional research leadership and contributions to luminescent nanocrystals, quantum dot solar cells, and QLEDs. At Peking University, under Professor Gong Qihuang, he developed cutting-edge devices and optimized fabrication platforms for quantum dots, which enhanced device efficiency and stability. His hands-on expertise spans from magnetron sputtering to transmission electron microscopy (TEM), showcasing his proficiency in advanced research instruments.
💡 Contributions and Research Focus
Ji’s research is driven by the fabrication and spectral tuning of luminescent nanocrystals, particularly quantum dots and perovskite quantum dots. Key contributions include:
- Quantum Dot Solar Cells: He developed a precise fabrication platform for AgBiS2 quantum dots, optimizing light absorption and solar cell efficiency.
- QLED Device Optimization: By improving spin-coating speeds and nanocrystal concentrations, Ji achieved high-brightness QLEDs, pushing the boundaries of light-emitting devices.
- Perovskite Nanostructures: He pioneered research into 1D nanostructures and core-shell structures, improving optical properties and stability for applications in optical communication and energy harvesting.
🌍 Impact and Influence
Ji’s work has left a lasting impact in the fields of nanotechnology, optical devices, and energy solutions. His research on quantum dot solar cells and QLEDs is essential for the advancement of renewable energy technologies and next-generation display systems. Through his collaborations with leading institutions like Peking University and Henan Academy of Sciences, Ji has not only advanced scientific understanding but also contributed to the commercialization of advanced technologies.
📑 Academic Cites
Ji’s research is widely cited in high-impact journals such as Nanotechnology, Micromachines, Materials, and Nano-Structures & Nano-Objects. His work on perovskite quantum dots and quantum dot solar cells has been instrumental in shaping contemporary research in renewable energy and optoelectronics. His publications have earned recognition for their novelty, technical depth, and practical applications.
🛠️ Research Skills
Ji’s technical expertise is multifaceted, and his key research skills include:
- Synthesis Methods: Mastery in hot injection, solvothermal, and ball-milling techniques to prepare quantum dots.
- Device Fabrication: Expertise in QLED and solar cell fabrication, optimizing processes like spin coating and annealing to enhance device performance.
- Material Characterization: Proficient in TEM, PR745 LED testing systems, and vacuum coating for material analysis and device testing.
🏫 Teaching Experience
Ji has shared his knowledge as a mentor to graduate students at Henan University and Xi’an Jiaotong University, guiding them through complex topics in semiconductor physics and material science. His role as a reviewer for various scientific journals demonstrates his commitment to fostering academic growth and providing critical feedback to emerging researchers in the field.
🏆 Awards and Honors
Ji’s academic excellence is reflected in numerous awards and scholarships, including:
- Third-Class Scholarship at Xi’an University of Technology (2012)
- First-Class Academic Scholarship at Henan University (2014)
- Yao Xi Ferroeletric Scholarship at Xi’an Jiaotong University (2020)
- Boya Postdoctoral Program at Peking University (2021)
- Outstanding Graduate of Shaanxi Province (2022)
🌟 Legacy and Future Contributions
Looking ahead, Ji is well-positioned to continue making groundbreaking contributions to the fields of nanotechnology and energy solutions. His ongoing projects in perovskite QLEDs and quantum dot solar cells are poised to lead to more efficient, durable, and cost-effective devices. His expertise in quantum materials will likely play a crucial role in the future development of sustainable energy technologies and advanced optoelectronic systems. Ji’s commitment to interdisciplinary research and mentorship ensures a bright future for both his career and the next generation of researchers.
Publications Top Notes
Group-VA Doped ZnO Injection Layer for Bright and Efficient Perovskite Light-Emitting Diodes
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Authors: X. Yang, Y. Ji, Q. Li, C. Lu, R. Zhu
Journal: Advanced Functional Materials
Year: 2025
Surface-enhanced Raman scattering of R6G dimerization during self-healing of gel
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Authors: Y. Zhou, M. Wang, J. Wang, N.V. Gaponenko, A.S. Bhatti
Journal: Mikrochimica Acta
Year: 2025
Solvent-Engineering-Assisted Ligand Exchange Strategy for High-Efficiency AgBiS2 Quantum Dot Solar Cells
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Authors: Q. Zhong, B. Zhao, Y. Ji, R. Zhu, L. Zhao
Journal: Angewandte Chemie – International Edition
Year: 2024
Lateral Phase Heterojunction for Perovskite Microoptoelectronics
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Authors: L. Li, H. Yan, S. Li, X. Wang, R. Zhu
Journal: Advanced Materials
Year: 2024
Ligand-Tuned AgBiS2 Planar Heterojunctions Enable Efficient Ultrathin Solar Cells
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Authors: J. Chen, Q. Zhong, E. Sirotti, R. Zhu, I.D. Sharp
Journal: ACS Nano
Year: 2024