Journal Article10.1063/1.4812587
Characterization of reactively sputtered molybdenum oxide films for solar cell application
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TL;DR: In this article, molybdenum oxide (MoO3) thin films were prepared via Radio Frequency (RF) sputtering at different ambient composition and post-deposition annealing.
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Abstract: Molybdenum oxide (MoO3) thin films were prepared via Radio Frequency (RF) sputtering at different ambient composition and post-deposition annealing. The effects on the structural, optical, and surface properties of the deposited films were investigated. The ambient oxygen concentration O2/(O2 + Ar) was varied from 10% to 100% at 10 mTorr. Post deposition anneals were performed in Ar at 300–500 °C. The films were analyzed using glancing incidence x-ray diffraction (GIXRD), UV/Vis/NIR spectrophotometry, and x-ray photoelectron spectroscopy (XPS). As-deposited films have amorphous structures, independent of the oxygen partial pressure. Annealing at 300 °C in air resulted in crystallization of the molybdenum oxide films to the monoclinic β-MoO3 phase. Samples annealed at 400 and 500 °C were identified as pure orthorhombic α-MoO3 phase with (020) preferred orientation. High resolution XPS studies showed the presence of Mo6+ (MoO3) and Mo5+ (Mo4O11) oxidation states at the surface of as deposited and low temper...
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Citations
Generalized molybdenum oxide surface chemical state XPS determination via informed amorphous sample model.
Jonas Baltrusaitis,Jonas Baltrusaitis,Beatriz Mendoza-Sánchez,V. Fernandez,Rick Veenstra,Nijole Dukstiene,Adam Roberts,Neal Fairley +7 more
TL;DR: In this article, an X-ray photoelectron spectroscopy (XPS) data processing method based on vector analysis was developed and presented, which allows creating XPS spectral components by incorporating key information, obtained experimentally.
454
Electronic properties of reduced molybdenum oxides
Katherine Inzani,Mohammadreza Nematollahi,Fride Vullum-Bruer,Tor Grande,Turid Worren Reenaas,Sverre Magnus Selbach +5 more
TL;DR: The electronic properties of MoO3 and reduced molybdenum oxide phases are studied by density functional theory (DFT) alongside characterization of mixed phase MoOx films and it is found that whilst MoO2 is easily distinguished fromMoO3, intermediate phases and phase mixtures have similar electronic structures.
HfO2 on UV–O3 exposed transition metal dichalcogenides: interfacial reactions study
Angelica Azcatl,Santosh Kc,Xin Peng,Ning Lu,Stephen McDonnell,Xiaoye Qin,Francis de Dios,Rafik Addou,Jiyoung Kim,Moon J. Kim,Kyeongjae Cho,Robert M. Wallace +11 more
- 13 Jan 2015
TL;DR: In this article, the surface chemistry of MoS2, WSe2 and MoSe2 upon ultraviolet (UV)?O3 exposure was studied in situ by x-ray photoelectron spectroscopy (XPS).
116
A van der Waals Density Functional Study of MoO3 and Its Oxygen Vacancies
TL;DR: In this paper, the exchange functional vdW-DF2 was used to model the electronic structure of layered molybdenum trioxide MoO3, in good agreement with experimental data.
Structural, optical, and surface properties of WO3 thin films for solar cells
TL;DR: In this article, tungsten oxide (WO3) thin films were deposited by Radio Frequency (RF) reactive sputtering in Ar + O 2 ambient and the effects of post deposition anneals in air on the structural, optical, and surface properties of the deposited films were investigated using X-ray diffraction, UV/Vis/NIR spectrophotometry, and X -ray photoelectron spectroscopy, respectively.
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TL;DR: In this article, the optical and electrical properties of thin films that are useful as transparent electrodes in electrochromic devices are discussed, and the properties of certain heavily doped widebandgap semiconductor oxides (especially In2O3:Sn) and of metal films are discussed.
Deposition temperature effect of RF magnetron sputtered molybdenum oxide films on the power conversion efficiency of bulk-heterojunction solar cells
Xi Fan,Guojia Fang,Pingli Qin,Nanhai Sun,Nishuang Liu,Qiao Zheng,Fei Cheng,Longyan Yuan,Xingzhong Zhao +8 more
TL;DR: In this article, the authors reported efficient bulk-heterojunction (regioregular poly (3-hexylthiophene) : (6,6)-phenyl C61 butyric acid methyl ester (P3HT : PCBM) solar cells with MoO3 as a hole-selective layer deposited at different substrate temperatures from 100 °C to 400 °C by radio-frequency magnetron sputtering.
Optical absorption studies in molybdenum trioxide thin films
V. K. Sabhapathi,O.Md. Hussain,P.S. Reddy,K.T. Ramakrishna Reddy,S. Uthanna,B.S. Naidu,P. Jayarama Reddy +6 more
TL;DR: In this article, the effect of substrate temperature and oxygen partial pressure on the structure and optical properties of molybdenum trioxide (MoO 3) films was investigated.