Influence of microstructure on temperature-induced ageing mechanisms of different solar absorber coatings

Kotilainen, Minna; Mizohata, Kenichiro; Honkanen, Mari; Vuoristo, Petri

doi:10.1016/j.solmat.2013.09.026

Cited by 37 publications

(17 citation statements)

References 54 publications

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“…Significant deviations in the absorption spectrum were observed after annealing nanocomposite absorber coating at 1273 K for 24 h. It has been shown that changes in the top surface morphology can be responsible for variation in the radiative properties at high temperatures. [ 41 ] In our case, the AFM surface profile image confirms the change in top surface morphology in terms of surface roughness and average particle size upon high‐temperature annealing (Figure S9, Supporting Information). The RMS values increased from 1–2 nm to 8–10 nm, and the average particle size increased from ≈5 nm to 35–40 nm.…”

Section: Resultssupporting

confidence: 71%

Refractory Ultrathin Nanocomposite Solar Absorber with Superior Spectral Selectivity and Thermal Stability

Raza

Alketbi

Devarapalli

et al. 2020

Advanced Optical Materials

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Highly efficient solar–thermal energy conversion requires refractory absorbers harnessing full spectrum of sunlight, minimal thermal emission, and structural stability at higher operating temperatures. Herein, an ultrathin ultrabroadband omnidirectional silicon carbide–tungsten (SiC‐W) refractory nanocomposite is fabricated by high‐throughput co‐sputtering with superior thermal and oxidation stability. The as‐fabricated SiC‐W nanocomposite (78 nm) deposited on tungsten layer with top anti‐reflective film exhibits high solar absorptance of 95.45% in the wide range of 250–2500 nm with thermal emittance below 0.05 at ambient temperature. The ultrabroadband absorption is achieved by plasmonic resonances triggered by self‐formed tungsten nanoclusters in the range of 500–1500 nm combined with SiC intrinsic absorption below λ < 500 nm. SiC as diffusion barrier also prevents interlayer diffusion and oxidation of tungsten nanoclusters to achieve superior thermal/oxidation stability, when annealed at 900 K (air) and 1050 K (vacuum). This work demonstrates outstanding capability of refractory nanocomposites in high‐performance solar thermal technologies for both terrestrial and space environments.

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Section: Resultssupporting

confidence: 71%

Refractory Ultrathin Nanocomposite Solar Absorber with Superior Spectral Selectivity and Thermal Stability

Raza

Alketbi

Devarapalli

et al. 2020

Advanced Optical Materials

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show abstract

“…In addition, the adhesion of solar absorbers is very important for flexible solar absorber applications. A solar absorber is usually used in complex and harsh environments, accompanied by delamination and stripping of coatings, and these problems are more severe for thick multilayered coatings . Therefore, overcoming the challenge of designing ultrathin SSACs by a simple method with excellent solar absorptivity and robust stability is of great importance for the practical application of flexible and wearable energy‐related devices.…”

Section: Introductionmentioning

confidence: 99%

An Ultrathin, Nanogradient, and Substrate‐Independent WO_x‐Based Film as a High Performance Flexible Solar Absorber

et al. 2019

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Advances in flexible and wearable energy-related devices increase the need for highly efficient, low-cost, ultrathin solar selective absorber coatings (SSACs). Herein, the fabrication of nanogradient WO x -based SSACs with excellent properties, including a superior solar absorptance of 0.93, an outstanding thermal robustness of up to 300 C, and substrate independence, is reported. More importantly, the thickness of WO x -based SSACs is only approximately 100 nm, which is substantially thinner than all other reported SSACs. These features arise from the two intrinsically absorptive WO x layers on a thin nanoplasmonic W layer. The deposition process is based on self-doped reactive sputtering via limited tungsten oxidation due to a small amount of oxygen. The WO x -based SSACs on a flexible polyimide sheet demonstrate stable performance, strong adhesion, and bendable nature. The proposed self-doped fabrication process provides a new way to design cost-effective ultrathin SSACs to meet the demand for large-scale flexible energy harvesting and supply applications.

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“…Na amostra 3, não foi observado descolamento do filme, que apresentou-se também bastante homogêneo, entretanto foram observadas o surgimento de partículas esféricas depositadas sobre o filme. Kotilainen et al (2014) observaram o aparecimento de pequenas ilhas de óxido, em superfícies seletivas de cromo, depositadas sobre um substrato de cobre. Essas ilhas resultam da difusão de átomos do substrato para a superfície, devido ao processo de envelhecimento.…”

Section: Microscopia Eletrônica De Varreduraunclassified

Efeitos Do Pós-Tratamento Térmico Em Superfícies Seletivas À Base De Óxidos De Cromo Obtidas Pelo Processo De Eletrodeposição

Gonçalves¹,

Medeiros²,

Gomes³

et al. 2019

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Influence of microstructure on temperature-induced ageing mechanisms of different solar absorber coatings

Cited by 37 publications

References 54 publications

Refractory Ultrathin Nanocomposite Solar Absorber with Superior Spectral Selectivity and Thermal Stability

Refractory Ultrathin Nanocomposite Solar Absorber with Superior Spectral Selectivity and Thermal Stability

An Ultrathin, Nanogradient, and Substrate‐Independent WO_x‐Based Film as a High Performance Flexible Solar Absorber

Efeitos Do Pós-Tratamento Térmico Em Superfícies Seletivas À Base De Óxidos De Cromo Obtidas Pelo Processo De Eletrodeposição

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Influence of microstructure on temperature-induced ageing mechanisms of different solar absorber coatings

Cited by 37 publications

References 54 publications

Refractory Ultrathin Nanocomposite Solar Absorber with Superior Spectral Selectivity and Thermal Stability

Refractory Ultrathin Nanocomposite Solar Absorber with Superior Spectral Selectivity and Thermal Stability

An Ultrathin, Nanogradient, and Substrate‐Independent WOx‐Based Film as a High Performance Flexible Solar Absorber

Efeitos Do Pós-Tratamento Térmico Em Superfícies Seletivas À Base De Óxidos De Cromo Obtidas Pelo Processo De Eletrodeposição

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Product

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An Ultrathin, Nanogradient, and Substrate‐Independent WO_x‐Based Film as a High Performance Flexible Solar Absorber