Electroluminescence at Si bandgap energy from metal-oxide-semiconductor tunneling diodes

Ching-Fuh Lin; Miin-Jang Chen; Ming-Hung Lee; Cheewee Liu

doi:10.1117/12.426934

18 May 2001 Electroluminescence at Si bandgap energy from metal-oxide-semiconductor tunneling diodes

Ching-Fuh Lin, Miin-Jang Chen, Ming-Hung Lee, Cheewee Liu

Proceedings Volume 4293, Silicon-based and Hybrid Optoelectronics III; (2001) https://doi.org/10.1117/12.426934
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

We report room-temperature electroluminescence at Si bandgap energy from Metal-Oxide-Semiconductor (MOS) tunneling diodes. The ultrathin gate oxide with thickness 1 to approximately 3 nm was grown by rapid thermal oxidation (RTO) to allow significant current to tunnel through. The measured EL efficiency of the MOS tunneling diodes increases with the injection current and could be in the order of 10^-5, which exceeds the limitation imposed by indirect bandgap nature of Si. We also study the temperature dependence of the electroluminescence and photoluminescence. The electroluminescence is much less dependent on temperature than photoluminescence from Si. The applied external field that results in the accumulation of majority carriers at Si/SiO₂ interface in the case of electroluminescence could be the reason for such difference. The involved physics such as optical phonon, interface roughness, localized carriers, and exciton radiative recombination are used to explain the electroluminescence from silicon MOS tunneling diodes.

Citation Download Citation

Ching-Fuh Lin, Miin-Jang Chen, Ming-Hung Lee, and Cheewee Liu "Electroluminescence at Si bandgap energy from metal-oxide-semiconductor tunneling diodes", Proc. SPIE 4293, Silicon-based and Hybrid Optoelectronics III, (18 May 2001); https://doi.org/10.1117/12.426934

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