https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47140 0.5Bi_0.5TiO₃–0.06BaTiO₃ is reported to have a micrometer-sized surface layer. We hypothesize that since this layer has structural properties distinct from the bulk, it would undergo a different property degradation than the bulk during cyclic electrical loading or fatigue. First, we show the existence of a surface layer by comparing X-ray diffraction patterns of the ceramic surface and powders. Then, we show that fatigue damage is mainly localized in the surface layers, and thus, property degradation due to fatigue can be recovered on removing the affected surface layer. We also show that ion migration may be occurring in the surface layer during fatigue experiments using secondary ion mass spectroscopy, where the ion sources may be the sample itself, the electrode layer or the insulating oil in which the experiment is performed. Finally, we show that permanent fatigue damage such as microcracks is dependent on the choice of electrodes. While permanent damage was observed for Pt electrodes, it was not present for oxide electrodes, suggesting that oxygen permeation and accumulation at the electrode/surface interface may play a role in the formation of observed microcracks. In summary, we have shown that fatigue is influenced by the surface layer, and surface layer damage can be controlled using the selection of electrodes.]]> Wed 14 Dec 2022 15:20:37 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52437 Wed 11 Oct 2023 14:55:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17011 Wed 11 Apr 2018 16:14:18 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:11881 Wed 11 Apr 2018 15:47:59 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:15266 Wed 11 Apr 2018 14:36:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:3338 Wed 11 Apr 2018 14:32:06 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:16999 Wed 11 Apr 2018 14:12:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:15263 Wed 11 Apr 2018 13:51:03 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17010 Wed 11 Apr 2018 13:30:41 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17012 Wed 11 Apr 2018 12:35:00 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:4354 Wed 11 Apr 2018 11:59:45 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18303 Wed 11 Apr 2018 11:59:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17005 61-butyric acid methyl ester (PCBM) and P3HT:indene-C₆₀ bisadduct (ICBA) polymer solar cells, with Ca/Al and Ca/Ag cathodes and indium tin oxide/poly(ethylene-dioxythiophene):polystyrene sulfonate anode have been investigated. Degradation occurs via a combination of three primary pathways: (1) cathodic oxidation, (2) active layer phase segregation, and (3) anodic diffusion. Fully degraded devices were subjected to thermal annealing under inert atmosphere. Degraded solar cells possessing Ca/Ag electrodes were observed to regenerate their performance, whereas solar cells having Ca/Al electrodes exhibited no significant regeneration of device characteristics after thermal annealing. Moreover, the solar cells with a P3HT:ICBA active layer exhibited enhanced regeneration compared to P3HT:PCBM active layer devices as a result of reduced changes to the active layer morphology. Devices combining a Ca/Ag cathode and P3HT:ICBA active layer demonstrated ∼50% performance restoration over several degradation/regeneration cycles.]]> Wed 11 Apr 2018 10:49:00 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:11880 Wed 11 Apr 2018 09:59:10 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:7983 Wed 11 Apr 2018 09:44:54 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19867 Tue 25 Jul 2023 12:18:39 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40972 1) exhibited an enhanced intensity. The scattered helium signal was modeled analytically and simulated numerically using Monte Carlo ray tracing. Both approaches gave excellent agreement with the experimental data and confirmed that the enhancement was due to localization of scattered helium atoms due to multiple scattering. The results were used to interpret SHeM images of a bio-technologically relevant sample with a deep porous structure, highlighting the relevance of multiple scattering in SHeM image interpretation.]]> Thu 21 Jul 2022 08:52:20 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26845 Sat 24 Mar 2018 07:41:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55408 Mon 27 May 2024 12:11:27 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55321 Mon 19 Aug 2024 18:49:57 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34115 Fri 10 Nov 2023 15:43:35 AEDT ]]>