Effects of Substrate Temperature and Oxygen Pressure on Crystallographic Orientations of Sputtered Nickel Oxide Films

Chen, Hao-Long; Lu, Yang‐Ming; Wu, Junyi; Hwang, Weng-Sing

doi:10.2320/matertrans.46.2530

Cited by 27 publications

(13 citation statements)

References 27 publications

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“…The XRD pattern (Figure 4A ) matches the standard spectrum of JCPDS 4-835 (Figure 4D ) except from two perspectives. Firstly, the peak corresponding to (220) is not obvious, which was consistent with other studies (Chen et al, 2005 ; Jang et al, 2008 ). Jang et al found that there is no (220) peak for NiO after sputter-coating even with heat treatment (Jang et al, 2008 ).…”

Section: Resultssupporting

confidence: 90%

Bimodular high temperature planar oxygen gas sensor

et al. 2014

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A bimodular planar O2 sensor was fabricated using NiO nanoparticles (NPs) thin film coated yttria-stabilized zirconia (YSZ) substrate. The thin film was prepared by radio frequency (r.f.) magnetron sputtering of NiO on YSZ substrate, followed by high temperature sintering. The surface morphology of NiO NPs film was characterized by atomic force microscope (AFM) and scanning electron microscope (SEM). X-ray diffraction (XRD) patterns of NiO NPs thin film before and after high temperature O2 sensing demonstrated that the sensing material possesses a good chemical and structure stability. The oxygen detection experiments were performed at 500, 600, and 800°C using the as-prepared bimodular O2 sensor under both potentiometric and resistance modules. For the potentiometric module, a linear relationship between electromotive force (EMF) output of the sensor and the logarithm of O2 concentration was observed at each operating temperature, following the Nernst law. For the resistance module, the logarithm of electrical conductivity was proportional to the logarithm of oxygen concentration at each operating temperature, in good agreement with literature report. In addition, this bimodular sensor shows sensitive, reproducible and reversible response to oxygen under both sensing modules. Integration of two sensing modules into one sensor could greatly enrich the information output and would open a new venue in the development of high temperature gas sensors.

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Section: Resultssupporting

confidence: 90%

Bimodular high temperature planar oxygen gas sensor

et al. 2014

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“…(111) orientation. Our data agree with prior work which has stated several times that the (111) growth direction tends to be favored when Ni oxide films are produced in the presence of a sufficient amount of oxygen [51][52][53] . are consistent with the morphology of our NiO 1.22 films reported on before [30] .…”

Section: Composition and Structure Of Ni Oxide Thin Filmssupporting

confidence: 92%

Anodic Electrochromism for Energy‐Efficient Windows: Cation/Anion‐Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films

Wen

Granqvist

Niklasson

2015

Adv Funct Materials

118

102

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Anodic electrochromic (EC) oxides are of major interest as counter electrodes for smart window applications owing to their unique optical properties upon charge insertion and extraction. However, performance optimization of such oxides has been hampered by limited understanding of their EC mechanism, particularly in Li + -conducting electrolytes. This paper reports on NiO x films with 1.16 ≤ x ≤ 1.32, prepared by sputter deposition. These films were immersed in an electrolyte of lithium perchlorate in propylene carbonate, and EC properties were studied by cyclic voltammetry and in situ optical transmittance measurements. The electrochromism was significantly enhanced at large values of x. We find that charge exchange in Ni oxide is mainly due to surface processes and involves both cations and anions from the electrolyte, which is different from the case of cathodic EC materials such as WO 3 .Whereas previous studies of Ni oxide have focused on cation intercalation, the cation/anionbased mechanism presented here offers a new paradigm for designing and developing EC devices such as smart windows for energy efficient buildings.2

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“…No specific preferred orientation is observed for the NiO phase in sample #07, but a (111) preferred orientation tends to increase from sample #07 to sample #13 (i.e. for p O2 > 0.13 Pa) as previously observed in similar films [28,29]. In the cubic NiO rock salt structure, the (111) plane corresponds to the pure compact plane of oxygen.…”

Section: Structural Propertiessupporting

confidence: 53%