M
Mika Valden
Researcher at Tampere University of Technology
Publications - 116
Citations - 6337
Mika Valden is an academic researcher from Tampere University of Technology. The author has contributed to research in topics: X-ray photoelectron spectroscopy & Adsorption. The author has an hindex of 26, co-authored 107 publications receiving 5824 citations. Previous affiliations of Mika Valden include Ben-Gurion University of the Negev & Texas A&M University.
Papers
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Journal ArticleDOI
Thermal Management in Long-Wavelength Flip-Chip Semiconductor Disk Lasers
Antti Rantamäki,Esa J. Saarinen,Jari Lyytikäinen,Juuso Heikkinen,Juha M. Kontio,Kimmo Lahtonen,Mika Valden,Oleg G. Okhotnikov +7 more
TL;DR: In this article, the thermal management of flip-chip semiconductor disk lasers (SDLs) emitting at wavelengths 1.3-1.6-μm was addressed, where GaAs-based materials in the distributed Bragg reflector (DBR) provided a combination of high thermal conductivity and high refractive index contrast.
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Effect of dielectric barrier on rectification, injection and transport properties of printed organic diodes.
Kaisa E. Lilja,Himadri S. Majumdar,Kimmo Lahtonen,Petri Heljo,Sampo Tuukkanen,Timo Joutsenoja,Mika Valden,Ronald Österbacka,Donald Lupo +8 more
TL;DR: In this paper, the authors examined the injection, transport and structure of printed organic copper/polytriarylamine (PTAA)/silver diodes with a thin insulating barrier layer at the copper/PTAA interface.
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Highly efficient charge separation in model Z-scheme TiO2/TiSi2/Si photoanode by micropatterned titanium silicide interlayer
TL;DR: In this article, an interfacial, topographically microstructured TiSi2 layer inside the TiO2/Si heterojunction improves the charge carrier separation and shifts the water dissociation onset potential to more negative values.
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The effect of platinum on the reducibility of Rh oxides on Ce ? Zr modified alumina supported automotive catalysts
TL;DR: In this paper, the reducibility of Rhodium oxide on alumina-containing washcoats without Pt was investigated by exposing the fresh and aged catalysts to 400 mbar of H 2 at 300 °C.
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High‐temperature‐aging‐promoted Rh oxides on supported automotive exhaust catalysts
TL;DR: In this article, the effect of aging, stabilizers and manufacturing method on the thermal stability of the noble metal oxide phases formed, a stepwise thermal decomposition in high vacuum (pressure <10 -7 Torr) was performed.