2017
Hafnium oxide thin films as a barrier against copper diffusion in solar absorbers
KOTILAINEN, Minna Paula Katriina, Richard KRUMPOLEC, Daniel FRANTA, Pavel SOUČEK, Tomáš HOMOLA et. al.Základní údaje
Originální název
Hafnium oxide thin films as a barrier against copper diffusion in solar absorbers
Autoři
KOTILAINEN, Minna Paula Katriina (246 Finsko, domácí), Richard KRUMPOLEC (703 Slovensko, garant, domácí), Daniel FRANTA (203 Česká republika, domácí), Pavel SOUČEK (203 Česká republika, domácí), Tomáš HOMOLA (703 Slovensko, domácí), David Campbell CAMERON (826 Velká Británie a Severní Irsko, domácí) a Petri VUORISTO (246 Finsko)
Vydání
Solar Energy Materials and Solar Cells, AMSTERDAM, NETHERLANDS, ELSEVIER SCIENCE BV, 2017, 0927-0248
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10302 Condensed matter physics
Stát vydavatele
Nizozemské království
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 5.018
Kód RIV
RIV/00216224:14310/17:00096512
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000401208200018
Klíčová slova anglicky
Solar absorber;Diffusion barrier;Thermal ageing;Copper diffusion;HfO2 thin film
Změněno: 4. 4. 2018 13:29, Ing. Nicole Zrilić
Anotace
V originále
The thermal stability of copper substrate material used in solar thermal collectors was investigated with and without atomic layer deposited (ALD) hafnium oxide barrier films at temperatures of 200–400 °C. HfO2 films were studied as barriers against thermal diffusion of copper substrate atoms. The ALD HfO2 thin films were deposited in a thermal process at 200 °C using Tetrakis(Dimethylamido)Hafnium(Hf(NMe2)4) and H2O precursors, with 200, 400, and 600 cycles. The Cu substrates with and without HfO2 thin films were aged by means of heat treatment in air. The influence of the HfO2 barriers was determined by optical, microstructural, and morphological analyses before and after the ageing procedures. The optical performance of the HfO2 barriers as a part of solar absorber stack was modelled with CODE Coating Designer. The copper surface without a HfO2 barrier thin film oxidized significantly, which increased thermal emittance and surface roughness. 200 cycles of HfO2 deposition did not result in a completely continuous coating and only provided a little protection against oxidation. Films of 200 and 400 cycles gave continuous coverage and the thickest HfO2 thin film studied, which was deposited from 600 ALD cycles and had a thickness ~50 nm, prevented Cu oxidation and diffusion processes after 2 h heat treatment in air at 300 °C, and retained low thermal emissivity. At 400 °C, diffusion and formation of copper oxide hillocks were observed but the HfO2 thin film significantly retarded the degradation when compared to a Cu substrate without and with thinner barrier layers.
Návaznosti
ED2.1.00/03.0086, projekt VaV |
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LO1411, projekt VaV |
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