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Main Title: Polarization-induced confinement of continuous hole-states in highly pumped, industrial-grade, green InGaN quantum wells
Author(s): Nippert, Felix
Nirschl, Anna
Schulz, Tobias
Callsen, Gordon
Pietzonka, Ines
Westerkamp, Steffen
Kure, Thomas
Nenstiel, Christian
Strassburg, Martin
Albrecht, Martin
Hoffmann, Axel
Type: Article
Language Code: en
Is Part Of:
Abstract: We investigate industrial-grade InGaN/GaN quantum wells (QWs) emitting in the green spectral region under high, resonant pumping conditions. Consequently, an ubiquitous high energy luminescence is observed that we assign to a polarization field Confined Hole Continuum (CHC). Our finding is supported by a unique combination of experimental techniques, including transmission electron microscopy, (time-resolved) photoluminescence under various excitation conditions, and electroluminescence, which confirm an extended out-of-plane localization of the CHC-states. The larger width of this localization volume surpasses the QW thickness, yielding enhanced non-radiative losses due to point defects and interfaces, whereas the energetic proximity to the bulk valence band states promotes carrier leakage.
Issue Date: 2016
Date Available: 29-May-2017
DDC Class: 530 Physik
Subject(s): quantum wells
ground states
stark effect
emission spectra
Journal Title: Journal of applied physics
Publisher: American Inst. of Physics
Publisher Place: Melville, NY
Volume: 119
Article Number: 215707
Publisher DOI:
EISSN: 0021-8979
Appears in Collections:Inst. Festkörperphysik » Publications

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