CURRENT
PhD candidateExpected graduation: Jun 2027Yifei Wang
I'm a PhD candidate in Materials Science and Engineering at Nanjing University of Science and Technology. My research focuses on perovskite and quantum-dot optoelectronics, especially integrated light-emitting and photodetecting devices, QLEDs, PeLEDs and Micro-QLEDs.
MIIT Key Laboratory of Advanced Display Materials and DevicesJiangsu Engineering Research Center for Quantum Dot DisplaySchool of Materials Science and Engineering, Institute of Optoelectronics & Nanomaterials, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
Profile snapshot
RESEARCH
Perovskite emittersQLED · PeLED · Micro-QLEDMETHODS
Materials → devicesSpectroscopy · optoelectronics01
Research in focus
Three publication-derived views of quantum-dot chemistry, fine spectral control and working optoelectronic devices.
02
Research Atlas
The programme begins with integrated light-emitting and photodetecting devices, then traces their materials foundation through purification and micro-pixel fabrication.
Figure to be added
A real, publication-cleared device or measurement figure is still required.
01
Integrated light-emitting and photodetecting intelligent devices
- Question
- How can carrier regulation support illumination and photodetection within one multifunctional perovskite LED platform?
- Approach
- Contribute to carrier-regulation strategy and dual-function device construction for an information-oriented white-LED project, then evaluate both LED and photodetector operating modes.
- Significance
- This work is ongoing. Quantitative results are withheld until the related paper is published.
02
Purification engineering for efficient quantum-dot LEDs
- Question
- How can purification remove synthesis residues without destabilising perovskite quantum dots or stripping functional ligands?
- Approach
- Relate purification-solvent polarity to ligand concentration, phase stability, defect states and charge transport, then validate the material changes in QLEDs.
- Significance
- The reported devices exceeded 23% external quantum efficiency and established a materials-to-device picture of fine purification.
03
Mask-free laser writing of Micro-QLED pixels
- Question
- Can electroluminescent quantum-dot pixels be patterned rapidly at ultra-high density without a conventional mask-and-etch sequence?
- Approach
- Use continuous-wave laser writing to transform selected perovskite regions into oxide isolation structures around the remaining emissive pixels.
- Significance
- The work demonstrated RGB Micro-QLED arrays with pixel densities from 2,000 to 5,000 PPI; the figure also illustrates arrays up to 10,000 PPI.
03
Selected Publications
Five first- or co-first-author papers selected from the supplied publication record.
One‐Step, Mask‐Free, Rapid Laser Writing Fabrication of Electroluminescent Perovskite@Oxide Pixels for Ultra‐High PPI, Efficient Micro‐QLEDs
Demonstrated one-step, mask-free laser writing for ultra-high-PPI electroluminescent perovskite pixel arrays.
Verified role Co-first author; responsible for device fabrication and optoelectronic testing.
04
News
- Co-authored room-temperature single-halogen RGB perovskite-film work published in Advanced Functional Materials.
- Co-authored wide-colour-gamut full-colour QLED display work published in Small.
- Co-authored pure-blue perovskite LED work published in Inorganic Chemistry.
- Sub-1 nm spectral-regulation work published in Nano Letters.
- Co-authored ionic-liquid-mediated crystallisation work published in ACS Applied Materials & Interfaces.
- Co-authored low-defect perovskite quantum-dot work published in Advanced Materials.
- Co-authored ultra-uniform perovskite quantum-dot work published in Advanced Materials.
- Co-first-author Micro-QLED work published in Advanced Functional Materials.
- Co-first-author phase-regulation work published in Nano Research.
- First-author purification-engineering paper published in ACS Applied Materials & Interfaces.
05
Education & Experience
Education
2023.09Present
PhD candidate, Materials Science and Engineering (combined MS–PhD track)
Nanjing University of Science and Technology
Advisors: Prof. Haibo Zeng and Prof. Hengyang Xiang. Research focus: perovskite light-emitting materials and devices. Expected graduation: Jun 2027.
2022.092023.08
Master's-stage study, Materials Science
Nanjing University of Science and Technology
Transitioned into the combined MS–PhD track.
2018.092022.06
Bachelor's degree, Nanomaterials and Technology
Nanjing University of Science and Technology
GPA 3.53/4.0; major-course average 86.75; cohort rank 30/238.
Experience
2021.072021.08
Intern
Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences
Studied cleanroom and micro/nanofabrication fundamentals and completed a SiP technology landscape review.
2020.092020.09
Intern
Nanjing Panda Electronics Co., Ltd.
Studied the liquid-crystal display manufacturing line and its key process steps.
Selected expertise
- Perovskite quantum-dot synthesis, ligand exchange and purification
- Solution thin films, thermal evaporation and device encapsulation
- PL/TRPL, UV–Vis, XRD, SEM, AFM and XPS
- J–V–L, EQE, lifetime, spectral response and optical bandwidth
- Origin, MATLAB, COMSOL and Silvaco TCAD
06
Honors & Awards
- First Prize, Jiangsu College Student Innovation CompetitionHigher Education Main Track · team member
- First Prize, NJUST College Student Innovation Competition FinalProject lead · Quantum Eye—Intelligent Communication Interaction System
- Meritorious Winner (M Award), Mathematical Contest in ModelingTeam leader
- National First Prize, 3rd Oubo Cup National Undergraduate Materials Research Ability ChallengeMaterials research competency competition
- Second Prize, 17th May Day Mathematical Modeling CompetitionTeam leader
- First Prize, NJUST Mathematical Modeling CompetitionTeam leader
07
About & Contact
About
My research focuses on perovskite and quantum-dot optoelectronics. I work across material synthesis and purification, crystallization control, thin-film and device fabrication, spectroscopy, electrical characterization and application validation. My current work spans efficient light-emitting devices, integrated light-emitting and photodetecting intelligent systems, Micro-QLED fabrication and fine spectral regulation.
Contact
mrwyf@njust.edu.cnwyf1232000@gmail.com
Nanjing, Jiangsu, China
Documents
CV download is temporarily unavailable while unpublished results are removed.
Open to academic, postdoctoral and research conversations