Abstract
We present our results related to the growth, photoluminescence characterization and modelling of a quantum well (QW) involving a type II heterostructure, Zn1-xCdxSe/ZnTe/Zn1-xCdxSe, confined within ZnSe barriers with a type I band alignment. We show that this type of hybrid QWs may be employed for the elaboration of Zn1-xCdxSe/ZnSe/GaAs based red emitters without exceeding a Cd content around 42%. The design of the ZnSe/Zn1−xCdxSe/ZnTe/Zn1−xCdxSe/ZnSe QW was based on calculations employing the transfer matrix method under the effective mass, envelope function approximation. The QW was epitaxially grown at 275°C on a semi-insulating GaAs (001) substrate by a combination of molecular beam epitaxy for the ZnSe barriers, submonolayer pulsed beam epitaxy for the ZnCdSe layers of the QW and atomic layer epitaxy for the central ZnTe QW layer. A heterostructure with a central region of 2 ZnTe monolayers surrounded at each side by seven monolayers of Zn1−xCdxSe, with x ∼ 0.41, presented a room temperature exitonic deep red emission with a peak at 1.829 eV.
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Acknowledgements
We acknowledge the partial support of Conacyt-Mexico. JCBB thanks Conacyt-Mexico for a Ph. D. scholarship. We thank the Advanced Laboratory of Electron Nanoscopy (LANE) for the STEM images, particularly Daniel Bahena and Alvaro Angeles.
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Banthí-Barcenas, J.C., Sutara, F. & Hernández-Calderón, I. Growth and Characterization of Type I Quantum Wells Based on ZnCdSe/ZnTe Type II Heterostructures Confined within ZnSe Barriers. J. Electron. Mater. 47, 4399–4403 (2018). https://doi.org/10.1007/s11664-018-6395-2
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DOI: https://doi.org/10.1007/s11664-018-6395-2