Fluorescent SiC as a new material for white LEDs

Syväjärvi M, Müller J, Sun JW, Grivickas V, Ou Y, Jokubavicius V, Hens P, Kaiser M, Ariyawong K, Gulbinas K, Liljedahl R, Linnarsson MK, Kamiyama S, Wellmann P, Spiecker E, Ou H (2012)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2012

Journal

Physica Scripta Institute of Physics

Publisher: Institute of Physics

Book Volume: T148

Article Number: 014002

DOI: 10.1088/0031-8949/2012/T148/014002

Abstract

Current III-V-based white light-emitting diodes (LEDs) are available. However, their yellow phosphor converter is not efficient at high currents and includes rare-earth metals, which are becoming scarce. In this paper, we present the growth of a fluorescent silicon carbide material that is obtained by nitrogen and boron doping and that acts as a converter using a semiconductor. The luminescence is obtained at room temperature, and shows a broad luminescence band characteristic of donor-to-acceptor pair recombination. Photoluminescence intensities and carrier lifetimes reflect a sensitivity to nitrogen and boron concentrations. For an LED device, the growth needs to apply low-off-axis substrates. We show by ultra-high-resolution analytical transmission electron microscopy using aberration-corrected electrons that the growth mechanism can be stable and that there is a perfect epitaxial relation from the low-off-axis substrate and the doped layer even when there is step-bunching.

Authors with CRIS profile

Julian Müller Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Michl Kaiser Institute Materials for Electronics and Energy Technology (i-MEET) Peter Wellmann Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Linköping University SE Sweden (SE) Meijo University / 名城大学 JP Japan (JP) Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) SE Sweden (SE) Technical University of Denmark / Danmarks Tekniske Universitet (DTU) DK Denmark (DK) Vilnius University / Vilniaus universitetas LT Lithuania (LT)

How to cite

APA:

Syväjärvi, M., Müller, J., Sun, J.W., Grivickas, V., Ou, Y., Jokubavicius, V.,... Ou, H. (2012). Fluorescent SiC as a new material for white LEDs. Physica Scripta, T148. https://dx.doi.org/10.1088/0031-8949/2012/T148/014002

MLA:

Syväjärvi, Mikael, et al. "Fluorescent SiC as a new material for white LEDs." Physica Scripta T148 (2012).

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