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HL: Fachverband Halbleiterphysik
HL 49: Quantum Dots: Optical Properties III
HL 49.11: Vortrag
Mittwoch, 22. März 2017, 12:30–12:45, POT 151
Temperature influence on the behaviour of 1D, 2D and 3D quantum confined system — •Parva Chhantyal1,3, Laszlo Sajti1, Carsten Reinhardt1,3, Suraj Naskar2,3, Dirk Dorfs2,3, Nadja Bigall2,3, and Boris Chichkov1 — 1Nanotechnology Department, Hollerithallee 8, D-30419 Hannover, Germany — 2Leibniz University Hannover, Physical Chemistry, Callinstrae 3a, 30167 Hannover, Germany — 3Laboratory for Nano and Quantum Engineering, Schneiderberg 39, 30167 Hannover, Germany
Semiconductor nanoparticles with size less than 10 nm have an interesting property, called quantum confinement, which represents the introduction of new properties to the materials by tuning their size and composition. In this research, an influence of temperature change on the behaviour of CdSe/CdS semiconductor nanoparticles is investigated. Initially, a comparative study of amplified spontaneous emission of these nanoparticles based on different sizes, such as dots, rods and platelets at room temperature is performed. The study is compared with respect to their sizes that provoke different absorption and emission spectra. The nanoparticles are spin coated on glass slides to make continuous films and then optically pumped by a 355 nm nanosecond laser. The fluorescence and laser emission spectra are measured and compared. Afterwards, the sample is heated up to different temperatures and subsequently, the influence of temperature on their emission spectra is compared for all three nanoparticles. Upon the observation of temperature influence on these nanoparticles, this approach can be adopted in real-life application as a temperature sensor.