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HL: Fachverband Halbleiterphysik

HL 26: 2D Materials and Heterostructures: Quantum Emitters and Defects

HL 26.8: Talk

Wednesday, March 20, 2024, 11:30–11:45, EW 201

Optoelectronic energy conversion based on atom scale and sustainable device architectures — •Maximilian A. Gruber, Alexander Hötger, and Alexander W. Holleitner — Walter-Schottky-Institute, TU Munich

Two-dimensional (2D) materials and heterostructures allow the exploration of fundamental quantum phenomena and advancing optoelectronics. Our work showcases a methodology for the integration of atomistic defects into 2D heterostructures, aiming to address the open-circuit voltage of single to few defects in a vertical tunneling device, revealing the potential of single-vacancy tunneling devices as atomic-scale photodiodes [1]. Moreover, we investigate the dynamics of hot charge carriers in atomically thin heterostructures via photocurrent and photovoltage experiments aiming to unravel the mechanisms of generation, transport and relaxation of hot carriers.

[1] A. Hötger et al. Photovoltage and photocurrent absorption spectra of sulfur vacancies locally patterned in monolayer MoS₂. Nano Letters accepted (2023)

Keywords: Single Defects; 2D Photodetector; Hot Carriers; 2D Materials