Esmaspäeval, 4. novembril 2019 kell 16:15 toimub Physicumis, W.Ostwaldi 1 ruumis D312
Laserspektroskoopia seminar No 279
Esineb Raghavan Chinnambedu Murugesan
Marie Skłodowska Curie Research Fellow
Aston Institute of Photonic Technologies, Aston University, Birmingham, B4 7ET, UK
Low-Threshold Lasing with Tunable Emission from Phase Pure Homologous 2D Organic-Inorganic Hybrid Perovskites
Organic–inorganic hybrid two-dimensional (2D) perovskites have recently attracted great attention in optical and optoelectronic applications due to their inherent natural quantum-well structure as well as their superior stability. Herein, we report the growth of high-quality millimeter-sized single crystals belonging to homologous two-dimensional (2D) hybrid organic–inorganic Ruddelsden–Popper perovskites (RPPs) of (BA)2(MA)n−1PbnI3n+1 (n = 1, 2, and 3) by a slow evaporation at a constant-temperature (SECT) solution-growth strategy. The as-grown 2D hybrid perovskite single crystals exhibit excellent crystallinity, phase purity, and spectral uniformity. Low-threshold lasing behaviors with different emission wavelengths at room temperature have been observed from the homologous 2D hybrid RPP single crystals. These result demonstrates that solution-growth homologous organic–inorganic hybrid 2D perovskite single crystals open up a new window as a promising candidate for optical gain media.
 Raghavan et al, Nano Lett. 2018, 18, 5, 3221-3228.
PS For postgraduate students: Seminar belongs to the Programme of Doctoral seminars LOFY.00.004 and by visiting it you can earn credit points!