Direct Observation of Two-Step Photon Absorption in an InAs/GaAs Single Quantum Dot for the Operation of Intermediate-Band Solar Cells.

Abstract

We present the first direct observation of two-step photon absorption in an InAs/GaAs single quantum dot (QD) using photocurrent spectroscopy with two lasers. The sharp peaks of the photocurrent are shifted due to the quantum confined Stark effect, indicating that the photocurrent from a single QD is obtained. In addition, the intensity of the peaks depends… (More)
DOI: 10.1021/acs.nanolett.5b00947

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@article{Nozawa2015DirectOO, title={Direct Observation of Two-Step Photon Absorption in an InAs/GaAs Single Quantum Dot for the Operation of Intermediate-Band Solar Cells.}, author={Tomohiro Nozawa and Hiroyuki Takagi and Katsuyuki Watanabe and Yasuhiko Arakawa}, journal={Nano letters}, year={2015}, volume={15 7}, pages={4483-7} }