1. Enhanced photoconductivity of embedded SiGe nanoparticles by hydrogenation
- Author
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Magdalena Lidia Ciurea, Jon Tomas Gudmundsson, H. G. Svavarsson, Andrei Manolescu, M. T. Sultan, and Toma Stoica
- Subjects
Photocurrent ,Materials science ,Passivation ,Hydrogen ,Photoconductivity ,Dangling bond ,General Physics and Astronomy ,Nanoparticle ,chemistry.chemical_element ,02 engineering and technology ,Surfaces and Interfaces ,General Chemistry ,Partial pressure ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Photochemistry ,01 natural sciences ,0104 chemical sciences ,Surfaces, Coatings and Films ,Ion ,chemistry ,0210 nano-technology - Abstract
We investigate the effect of room-temperature hydrogen-plasma treatment on the photoconductivity of SiGe nanoparticles sandwiched within SiO2 layers. An increase in photocurrent intensity of more than an order magnitude is observed after the hydrogen plasma treatment. The enhancement is attributed to neutralization of dangling bonds at the nanoparticles and to passivation of nonradiative defects in the oxide matrix and at SiGe/matrix interfaces. We find that increasing the partial pressure of hydrogen to pressures where H3+ and H2+ were the dominant ions results in increased photocurrent.
- Published
- 2019