Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 49: Quantum dots and wires II

HL 49.9: Vortrag

Mittwoch, 18. März 2020, 17:30–17:45, POT 151

Carrier and energy transfer in colloidal quantum dot semiconductor hybrids — •Mikko Wilhelm, Shyam Kommadath, Salwa Khokhar, and Wolfram Heimbrodt — Philipps-Universität Marburg

Colloidal quantum dots are attractive for functionalization of semiconductors in electronic and opto-electronic devices like solar cells, field effect transistors or spintronic devices. CdS/ZnS and CdSe/ZnS core/shell quantum dots of different sizes synthesized in solution are deposited via knife coating on different semiconductor substrates. Depending on the band alignment between the quantum dots and the semiconductor substrate, energy and charge transfer is observed. The interaction between the quantum dots and semiconductor substrate is studied with optical spectroscopy. The results of continuous wave and time resolved photoluminescence measurements at different temperatures from 10K to room temperature are presented and discussed.