Hybrid Semiconductors
Our group synthesize hybrid organic-inorganic heterostructures with enhanced functionality, reproducibility, and stability for next-generation optoelectronic applications.
Optical Spectroscopy
We utilize in-situ and ultrafast spectroscopy for non-invasive understanding of materials growth, interfacial structures, and carrier dynamics across various semiconductor interfaces.
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Optoelectronic Devices
We develop energy-efficient devices for converting photons to electrons, electrons to photons, and photons to chemicals, aiming for a sustainable energy future.
News
Our paper on cross-linked molecular contacts was accepted in Science
Hole-selective self-assembled monolayers have enabled breakthroughs in the performance of perovskite optoelectronics. We show that commonly used monomeric contacts undergo thermal-induced disorder that disrupts carrier transport. We introduce a nucleophilic monolayer to construct polymeric molecular contacts in situ, producing more stable perovskite/Si tandem solar cells.
2025/09/23
The Goldschmidt tolerance factor rationalizes A-site cation selection in halide perovskites; rubidium was long considered incompatible with lead-iodide perovskites due to its small ionic radius. Our collaborative work shows that interfacial strain stabilizes rubidium incorporation into the perovskite lattice, producing homogeneous films suitable for tandem applications.
2025/04/03
Formamidinium lead iodide perovskites are promising for photovoltaic applications, but water absorption induces transformation to non-photoactive phases. Our work showed that dimethyl sulfoxide, a hygroscopic solvent widely used in perovskite fabrication, exacerbates this challenge. We used a hydrophobic capping layer that blocks moisture uptake to mitigate this issue.
2024/07/11
Contact
Dr. Mingyang Wei
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Department of Materials Science and Engineering
National University of Singapore
Singapore 117575
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Email: weimingy@nus.edu.sg
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Openings
Multiple graduate positions are available in our group. Candidates with backgrounds in synthetic or physical chemistry, semiconductor physics, materials science, and electrical engineering are encouraged to apply. Only shortlisted candidates will be contacted.
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