Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 35: HL Poster II
HL 35.29: Poster
Mittwoch, 3. April 2019, 17:30–20:00, Poster E
Optoelectronic Interaction Between Colloidal Quantum Dots and Buried Quantum Wells — •Mikko Wilhelm1, Shyam Kommadath1, Atif Masood1, Torsten Henning2, Wolfgang Parak3, and Wolfram Heimbrodt1 — 1Philipps-Universität Marburg — 2Justus-Liebig-Universität Gießen — 3Universität Hamburg
The optoelectronic coupling between colloidal quantum dots and different substrates is studied. CdS quantum dots and CdS/ZnS core/shell quantum dots are deposited via drop casting and spin coating on the substrates, for which different semiconductor and quantum well structures are used. The MBE grown quantum well structures consist of a 5nm thick ZnSe quantum well between (Zn, Mn)Se barriers, which differ in their manganese concentration. The thickness of the top barrier of the quantum well structure is modified by chemical etching. The energy transfer between the quantum dots and the substrate is investigated with time-resolved photoluminescence measurements in the nano- and picosecond range at different temperatures. The results are discussed in detail.