1. Understanding the in-situ transformation of ▫$Cu_xO$▫ interlayers to increase the water splitting efficiency in NiO/n-Si photoanodesChao Feng, Zhi Liu, Huanxin Ju, Andraž Mavrič, Matjaž Valant, Jie Fu, Beibei Zhang, Yanbo Li, 2024, original scientific article Abstract: The buried interface tens of nanometers beneath the solid-liquid junction is crucial for photocarrier extraction, influencing the overall efficiency of photoelectrochemical devices. Precise characterization of the interfacial properties is essential for device optimization but remains challenging. Here, we directly probe the in situ transformation of a CuxO interlayer at the NiO/n-Si interface by hard X-ray photoelectron spectroscopy. It is found that Cu(I) in the CuxO interlayer gradually transforms to Cu(II) with air exposure, forming an energetically more favorable interface and improving photoanode’s efficiency. Based on this finding, a reactive e-beam evaporation process is developed for the direct deposition of a CuO interlayer, achieving a half-cell solar-to-hydrogen efficiency of 4.56% for the optimized NiO/CuO/n-Si heterojunction photoanode. Our results highlight the importance of precision characterization of interfacial properties with advanced hard X-ray photoelectron spectroscopy in guiding the design of efficient solar water-splitting devices.
Keywords: photo anode, energy harvesting, nickel oxide, interface
Published in RUNG: 01.08.2024; Views: 2111; Downloads: 12
 Full text (2,10 MB)
This document has many files! More... |
2. Silica-coated ▫$Bi2_Se_3$▫ topological insulator nanoparticles: preserving their optical properties and make them biocompatible : preserving their optical properties and make them biocompatibleBlaž Belec, Nina Kostevšek, Giulia Della Pelle, Sebastjan Nemec, Slavko Kralj, Martina Bergant Marušič, Sandra Gardonio, Mattia Fanetti, Matjaž Valant, 2023, published scientific conference contribution abstract Keywords: topological insulator, bismuth selenide, photo-thermal material, biocompatibility, nanoparticles
Published in RUNG: 19.10.2023; Views: 2292; Downloads: 4
 Link to file
This document has many files! More... |
3. A dual-wavelength photothermal aerosol absorption monitor : design, calibration, performance and measurements of coated sootGriša Močnik, 2023, invited lecture at foreign university Keywords: aerosol absorption, photo-thermal interferometer, absorption coefficient, black carbon, soot, aerosol coating, absorption enhancement
Published in RUNG: 05.10.2023; Views: 2727; Downloads: 1
This document has many files! More... |
4. Multicomponent Cu-Mn-Fe silica supported catalysts to stimulate photo-Fenton-like water treatment under sunlightAndraž Šuligoj, Ivalina Trendafilova, Ksenija Maver, Albin Pintar, Alenka Ristić, Goran Dražić, Wael H. M. Abdelraheem, Zvonko Jagličić, Iztok Arčon, Nataša Zabukovec Logar, Dionysios D. Dionysiou, Nataša Novak Tušar, original scientific article Keywords: Magnetic catalyst, Photocatalyst, Water treatment, Sunlight, Contaminants of emerging concern, Photo-Fenton-like systems, Cu, Mn, Fe, XANES, EXAFS
Published in RUNG: 06.07.2023; Views: 3636; Downloads: 10
Full text (4,32 MB) |
5. Silica coated ▫$Bi_2Se_3$▫ topological insulator nanoparticles : an alternative route to retain their optical properties and make them biocompatibleBlaž Belec, Nina Kostevšek, Giulia Della Pelle, Sebastjan Nemec, Slavko Kralj, Martina Bergant Marušič, Sandra Gardonio, Mattia Fanetti, Matjaž Valant, 2023, original scientific article Keywords: topological insulator, bismuth selenide, photo-thermal materials, biocompatibility, nanoparticles
Published in RUNG: 22.02.2023; Views: 3776; Downloads: 7
Full text (8,09 MB)
This document has many files! More... |
6. |
7. A single-beam photothermal interferometer for in situ measurements of aerosol light absorptionBradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest Weingartner, 2020, original scientific article Abstract: We have developed a novel single-beam photothermal interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal interferometers, making it ideal for field measurements. Due to a unique configuration of the reference interferometer arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1, respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
Keywords: aerosol, aerosol absorption, black carbon, photo-thermal interferometer, climate change
Published in RUNG: 29.12.2020; Views: 4059; Downloads: 78
Full text (2,44 MB) |
8. |
9. Spectroscopic Photo-IV Diagnostics of Nitride-based HEMT on Si WafersFei Tong, Kosala Yapabandara, Chunwei Yang, Min Khanal, Chunkun Jiao, M Goforth, Ozden Burcu, Ayayi Ahyi, Michael Hamilton, Guofu Niu, D.A. Ewoldt, G Chung, Minseo Park, 2013, original scientific article Keywords: Spectroscopic Photo-IV, AlGaN/GaN HEMT
Published in RUNG: 16.01.2017; Views: 5776; Downloads: 0
This document has many files! More... |
10. Depth-resolved ultra-violet spectroscopic photo current-voltage measurements for the analysis of AlGaN/GaN high electron mobility transistor epilayer deposited on SiBurcu Ozden, Chungman Yang, Fei Tong, Min Khanal, Vahid Mirkhani, Mobbassar Hassan Sk, Ayayi Ahyi, Minseo Park, 2014, original scientific article Keywords: AlGaN/GaN high electron mobility transistor, Depth-resolved ultra-violet spectroscopic photo current-voltage measurement
Published in RUNG: 16.01.2017; Views: 5931; Downloads: 0
This document has many files! More... |
