Appointment: Research Fellow (Former)

Research topics:

•Ultrafast spectroscopy study of photophysics in semiconductor and perovskites nanostructures with focus on colloidal nanocrystals

• Charge carrier dynamics in light harvesting, -emitting or -sensing devices

• Optical gain and lasing

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1 to 3 of 3 Results
Apr 15, 2019
Li, Mingjie; Qi Wei; Subas Kumar Muduli; Natalia Yantara; Qiang Xu; Nripan Mathews; Subodh G. Mhaisalkar; Guichuan Xing; Sum, Tze Chien, 2019, "Replication Data for: Enhanced Exciton and Photon Confnement in Ruddlesden–Popper Perovskite Microplatelets for Highly Stable Low-Threshold Polarized Lasing",, DR-NTU (Data), V1
At the heart of electrically driven semiconductors lasers lies their gain medium that typically comprises epitaxially grown double heterostuctures or multiple quantum wells. The simultaneous spatial confinement of charge carriers and photons afforded by the smaller bandgaps and h...
Mar 18, 2019
Li, Mingjie; Saikat Bhaumik; Teck Wee Goh; Muduli Subas Kumar; Natalia Yantara; Michael Gra¨tzel; Subodh Mhaisalkar; Nripan Mathews; Sum, Tze Chien, 2019, "Replication Data for: Slow cooling and highly efficient extraction of hot carriers in colloidal perovskite nanocrystals",, DR-NTU (Data), V1
Hot-carrier solar cells can overcome the Shockley–Queisser limit by harvesting excess energy from hot carriers. Inorganic semiconductor nanocrystals are considered prime candidates. However, hot-carrier harvesting is compromised by competitive relaxation pathways (for example, in...
Jan 15, 2019
Li, Mingjie; Raihana Begum; Jianhui Fu; Qiang Xu; Teck Ming Koh; Sjoerd A. Veldhuis; Michael Grätzel; Nripan Mathews; Subodh Mhaisalkar; Sum, Tze Chien, 2019, "Replication Data for: Low threshold and efficient multiple exciton generation in halide perovskite nanocrystals",, DR-NTU (Data), V1
Multiple exciton generation (MEG) or carrier multiplication, a process that spawns two or more electron–hole pairs from an absorbed high-energy photon (larger than two times bandgap energy Eg), is a promising way to augment the photocurrent and overcome the Shockley–Queisser limi...
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