Temperature tuning from direct to inverted bistable electroluminescence in resonant tunneling diodes
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We study the electroluminescence (EL) emission of purely n-doped resonant tunneling diodes in a wide temperature range. The paper demonstrates that the EL originates from impact ionization and radiative recombination in the extended collector region of the tunneling device. Bistable current-voltage response and EL are detected and their respective high and low states are tuned under varying temperature. The inversion bistability of the EL intensity can be switched from direct to inverted with respect to the tunneling current and the optical on/off ratio can be enhanced with increasing temperature. One order of magnitude amplification of the optical on/off ratio can be attained compared to the electrical one. Our observation can be explained by an interplay of moderate peak-to-valley current ratios, large resonance voltages, and electron energy loss mechanisms and thus could be applied as an alternative route towards optoelectronic applications of tunneling devices.
Hartmann , F , Pfenning , A , Rebello Sousa Dias , M , Langer , F , Höfling , S , Kamp , M , Worschech , L , Castelano , L K , Marques , G E & Lopez-Richard , V 2017 , ' Temperature tuning from direct to inverted bistable electroluminescence in resonant tunneling diodes ' Journal of Applied Physics , vol 122 , no. 15 , 154502 . DOI: 10.1063/1.4994099
Journal of Applied Physics
© 2017, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at http://dx.doi.org/10.1063/1.4994099
The authors are grateful for financial support by the BMBF via national project EIPHRIK (FKZ: 13N10710), the European Union (FPVII (2007-2013) under grant agreement no. 318287 LANDAUER), and the Brazilian Agencies CNPq and CAPES. S. H. gratefully acknowledges support by the Royal Society and the Wolfson Foundation.
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