Search Results - "Svavarsson, H. G"

Frequency-dependent conductivity in lithium-diffused and annealed GaAs by Gudmundsson, J.T., Svavarsson, H.G., Gudjonsson, S., Gislason, H.P.

“…We report on measurements of the frequency-dependent conductivity in lithium-diffused (Li-diffused) and annealed GaAs in the frequency range 10–106Hz and the…”
Get full text

Germanium coated silicon nanowires as human respiratory sensing device by Fakhri, E., Sultan, M. T., Manolescu, A., Ingvarsson, S., Svavarsson, H. G.

“…We report on germanium coated silicon nanowires structures synthesized with metal assisted chemical etching and qualify their functionality as human…”
Get full text

OH−ions can reduce the iodide migration in MAPI by Brophy, R. E., Kateb, M., Ghitiu, I., Filipoiu, N., Torfason, K., Svavarsson, H. G., Nemnes, G. A., Pintilie, I., Manolescu, A.

“…One of the main degradation mechanisms of methy-lammonium lead iodine (MAPI), which is an important material for perovskite based solar cells, is the migration…”
Get full text

Experimental observation of leaky modes and plasmons in a hybrid resonance element by Magnusson, R., Svavarsson, H. G., Yoon, J., Shokooh-Saremi, M., Song, S. H.

“…We provide experimental evidence of a hybrid photonic device supporting simultaneously surface-plasmon polaritons and resonant leaky modes. A fabricated…”
Get full text

Synthesis and photoluminescence study of silicon nanowires obtained by metal assisted chemical etching by Fakhri, E., Sultan, M. T., Manolescu, A., Ingvarsson, S., Plugaru, N., Plugaru, R., Svavarsson, H. G.

“…Silicon nanowires (SiNWs) hold potential applications in optoelectronics and SiNW-based optical sensors. Here, a photoluminescence study of SiNW arrays…”
Get full text

Facile formation of self-assembled Ga droplets on GaAs (001) substrate by Sultan, M. T., Arnason, H. O., Ingvarsson, S., Arnalds, U. B., Svavarsson, H. G., Manolescu, A., Valfells, A.

“…We investigate the formation and evolution of Ga droplets over GaAs (001) substrate with and without Ge top layer (8 nm). Various morphological transformation…”
Get full text

Effect of hydrogenation on minority carrier lifetime in low-grade silicon by Danielsson, D M, Gudmundsson, J T, Svavarsson, H G

Get full text

Ge coated silicon nanowires as human respiratory sensing device by Fakhri, E, Sultan, M. T, Manolescu, A, Ingvarsson, S, Svavarsson, H. G

“…We report on Ge coated silicon nanowires (SiNWs) sensors synthesized with metal assisted chemical etching and qualify their functionality as human respiratory…”
Get full text

OH$^-$ ions can reduce the iodide migration in MAPI by Brophy, R. E, Kateb, M, Ghitiu, I, Filipoiu, N, Torfason, K, Svavarsson, H. G, Nemnes, G. A, Pintilie, I, Manolescu, A

“…One of the main degradation mechanisms of methylammonium lead iodine (MAPI), which is an important material for perovskite based solar cells, is the migration…”
Get full text

Potential Fluctuations and Site Switching in Si-doped GaAs Studied by Photoluminescence by Svavarsson, H G, Gudmundsson, J T, Gudjonsson, G I, Gislason, H P

Get full text

Lithium-diffused and annealed GaAs: An admittance spectroscopy study by Svavarsson, H. G., Gudmundsson, J. T., Gislason, H. P.

Get full text

Enhanced photoconductivity of embedded SiGe nanoparticles by hydrogenation by Sultan, M.T., Gudmundsson, J.T., Manolescu, A., Stoica, T., Ciurea, M.L., Svavarsson, H.G.

“…We investigate the effect of room-temperature hydrogen-plasma treatment on the photoconductivity of SiGe nanoparticles sandwiched within SiO2 layers. An…”
Get full text

Obtaining SiGe nanocrystallites between crystalline TiO2 layers by HiPIMS without annealing by Sultan, M.T., Gudmundsson, J.T., Manolescu, A., Teodorescu, V.S., Ciurea, M.L., Svavarsson, H.G.

“…[Display omitted] •A crystalline structure of TiO2/SiGe/TiO2 obtained without the need of annealing.•Control of HiPIMS discharge parameters results in…”
Get full text

Photoluminescence study of Si1-xGex nanoparticles in various oxide matrices by Sultan, M. T., Gudmundsson, J. T., Manolescu, A., Ciurea, M. L., Svavarsson, H. G., Ingvarsson, S.

“…We investigate the photoluminescence properties of structures comprising of Si 1-x Ge x nanoparticles (NPs) within SiO 2 , GeO 2 , TiO 2 and Ta 2 O 5 oxide…”
Get full text

Structure and electrical behavior of silicon nanowires prepared by MACE process by Plugaru, R., Fakhri, E., Romanitan, C., Mihalache, I., Craciun, G., Plugaru, N., Árnason, H.Ö., Sultan, M.T., Nemnes, G.A., Ingvarsson, S., Svavarsson, H.G., Manolescu, A.

“…We report on the structure and electrical characteristics of silicon nanowire arrays prepared by metal assisted chemical etching (MACE) method, investigated by…”
Get full text

Hydrogen passivation of AlxGa1−xAs/GaAs studied by surface photovoltage spectroscopy by Olafsson, H.Ö, Gudmundsson, J.T, Svavarsson, H.G, Gislason, H.P

“…We study the effect of hydrogen passivation on AlxGa1−xAs grown by liquid-phase epitaxy (LPE) on semi-insulating GaAs. Using surface photovoltage (SPV)…”
Get full text

The effect of Si site-switching in GaAs on electrical properties and potential fluctuation by Svavarsson, H.G, Gudmundsson, J.T, Gudjonsson, G.I, Gislason, H.P

“…Si-doped GaAs layers were grown p-type at 700°C and n-type at 840°C by liquid phase epitaxy. Thermal annealing of the p-type samples at temperatures around…”
Get full text

Lithium–gold-related complexes in p-type crystalline silicon by Gudmundsson, J.T, Svavarsson, H.G, Gislason, H.P

“…Using Hall and conductivity measurements the formation of a Li–Au-related complex in p-type crystalline silicon is demonstrated. Substitutional gold is known…”
Get full text

Influence of preparation conditions on structure and photosensing properties of GeSi/TiO2 multilayers by Slav, A., Palade, C., Stavarache, I., Teodorescu, V. S., Ciurea, M. L., Muller, R., Dinescu, A., Sultan, M. T., Manolescu, A., Gudmundsson, J. T., Svavarsson, H. G.

“…The photosensing properties related to the structure of GeSi/TiO2 multilayers prepared under different conditions are studied. TiO 2 cap/(GeSi/TiO 2 ) 2…”
Get full text

Fabrication and Characterization of Large, Perfectly Periodic Arrays of Metallic Nanocups by Svavarsson, H. G., Yoon, J. W., Shokooh-Saremi, M., Song, S. H., Magnusson, R.

“…Fabrication of plasmonic resonance devices composed of large arrays of highly ordered gold nanocups is presented. The nanostructures are generated from…”
Get full text