Preparation of MoO2 sub-micro scale sheets and their optical properties

Liu, Xinli; He, Yuehui; Wang, Shiliang; Zhang, Quan

doi:10.1016/j.jallcom.2011.01.089

Cited by 31 publications

(15 citation statements)

References 31 publications

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“…The MoO 3 layer is a semiconductor oxide that absorbs at wavelengths of 350 nm and below. [7][8][9][10] It also shows oxygen-release and exchange properties as reported by Mestl et al 61 Thus, the normalized IPCE spectra of the IMEC devices shown in Fig. 24b present two peaks below 400 nm, one at 340 nm that corresponds to the MoO 3 and a second one that corresponds to the ZnO at 380 nm.…”

Section: Un-encapsulated Devices: Nrel and Imecsupporting

confidence: 73%

“…In the case of the IMEC device the UV region below 400 nm is wider than for the NREL solar cell, due to the absorption of both, the electron extraction layer (EEL) made of ZnO 17,18 and the hole extraction layer (HEL) made of MoO 3 . [7][8][9][10] In the case of NREL only the peak that corresponds to ZnO is observed at 380 nm. The PEDOT:PSS layer is observed indirectly by a peak at 425-440 nm that has been attributed to the interaction between PEDOT:PSS and the metal electrode Ag.…”

Section: General Characterization Reference Devicesmentioning

confidence: 99%

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On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

Terán-Escobar

Tanenbaum

Voroshazi

et al. 2012

Phys. Chem. Chem. Phys.

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This work is part of the inter-laboratory collaboration to study the stability of seven distinct sets of state-of-the-art organic photovoltaic (OPV) devices prepared by leading research laboratories. All devices have been shipped to and degraded at RISØ-DTU up to 1830 hours in accordance with established ISOS-3 protocols under defined illumination conditions. In this work, we apply the Incident Photon-to-Electron Conversion Efficiency (IPCE) and the in situ IPCE techniques to determine the relation between solar cell performance and solar cell stability. Different ageing conditions were considered: accelerated full sun simulation, low level indoor fluorescent lighting and dark storage. The devices were also monitored under conditions of ambient and inert (N 2 ) atmospheres, which allows for the identification of the solar cell materials more susceptible to degradation by ambient air (oxygen and moisture). The different OPVs configurations permitted the study of the intrinsic stability of the devices depending on: two different ITO-replacement alternatives, two different hole extraction layers (PEDOT:PSS and MoO 3 ), and two different P3HT-based polymers. The response of un-encapsulated devices to ambient atmosphere offered insight into the importance of moisture in solar cell performance. Our results demonstrate that the IPCE and the in situ IPCE techniques are valuable analytical methods to understand device degradation and solar cell lifetime.

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Section: Un-encapsulated Devices: Nrel and Imecsupporting

confidence: 73%

Section: General Characterization Reference Devicesmentioning

confidence: 99%

On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

Terán-Escobar

Tanenbaum

Voroshazi

et al. 2012

Phys. Chem. Chem. Phys.

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show abstract

“…5,[9][10][11][12][13] It can be found in the mineral tugarinovite (named after the geochemist Alexsey Ivanovich Tugarinov) 14 and shows a metal-like electric conductivity being unusual for transition-metal oxides. 15,16 It does not have a variety of technological applications such as MoO3 but there are some interesting approaches for usage as anode material in lithium-ion batteries, 15,[17][18][19][20] films for energy storage, 21 soft-magnetic and optical materials, [22][23][24] and as nanorods. 22,25 The synthesis of other oxides with metal ions in just one oxidation state probably cannot be achieved by conventional chemical methods, like oxidation or reduction.…”

Section: Introductionmentioning

confidence: 99%

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

et al. 2017

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High-pressure molybdenum dioxide (HP-MoO2) was synthesized using a multi-anvil press at 18 GPa and 1073 K, as motivated by previous first-principles calculations. The crystal structure was determined by single-crystal X-ray diffraction. The new polymorph crystallizes isotypically to HP-WO2 in the orthorhombic crystal system in space group Pnma and was found to be diamagnetic. Theoretical investigations using structure optimization at density-functional theory (DFT) level indicate a transition pressure of 5 GPa at 0 K and identify the new compound as slightly metastable at ambient pressure with respect to the thermodynamically stable monoclinic MoO2 (α-MoO2; ΔEm = 2.2 kJ·mol -1 ).

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“…Nanometric MoO 2 has attracted great technological interest because of its interesting physicochemical properties and is applied as a catalyst [13,14], an energy storing [15], soft magnetic [16], and optical [17,18] material.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical properties of MoO2 thin films

Dukštienė

Sinkevičiūtė

2013

J Solid State Electrochem

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Thin MoO 2 films were electrodeposited on a selenium pre-deposited SnO 2 |glass plate. The photoelectrochemical properties of MoO 2 films were investigated in 0.1 M Na 2 SO 4 solution by the ultraviolet-visible spectrophotometry, linear sweep voltammetry, and altering current impedance measurement techniques. It was found that under illumination with the incident light of λ=366 nm, the photo response of the MoO 2 |SnO 2 |glass electrode resulted from the MoO 2 layer, while the SnO 2 layer served as a sink for photogenerated charge carriers. The MoO 2 film exhibited ntype conductivity. A schematic band structure diagram of MoO 2 in 0.1 M Na 2 SO 4 solution was constructed. The flat band potential (E fb ), the donor concentration (N D ), the photogeneration current efficiency depended on MoO 2 film thickness. The [Fe(CN) 6 ] 4−/3− redox PEC cell with MoO 2 | SnO 2 |glass plate as a photoanode was constructed. Power output characteristics such as the open circuit voltage (V OC ), short circuit current (I SC ), the fill factor (FF), and the lightto-electrical conversion efficiency (η) were determined. The maximum light-to-electrical conversion efficiency exhibited by the PEC cell was 0.94 %.

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Preparation of MoO2 sub-micro scale sheets and their optical properties

Cited by 31 publications

References 31 publications

On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

Photoelectrochemical properties of MoO2 thin films

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Preparation of MoO2 sub-micro scale sheets and their optical properties

Cited by 31 publications

References 31 publications

On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

On the stability of a variety of organic photovoltaic devices by IPCE and in situ IPCE analyses – the ISOS-3 inter-laboratory collaboration

HP-MoO2: A High-Pressure Polymorph of Molybdenum Dioxide

Photoelectrochemical properties of MoO2 thin films

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HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide