Electron and hole doping in NiO

Enhanced Efficiency in Plastic Solar Cells via Energy Matched Solution Processed NiOx Interlayers

“…There is also evidence in the literature that a small density of states near 1.5 eV above E f similar to that shown in Figure 1 b may be associated with p-doped NiO x . [ 30,31 ] These IPES data, however, were acquired on very thin NiO x layers and we cannot rule out some spectral contribution from the underlying ITO substrate. Other UPS/IPES studies of these NiO x thin fi lms will be communicated in the future.…”

Nature of the hole states in Li-doped NiO

“…In addition to the peak appearing at about 528.5 eV, there is another peak at about 530 eV which was ignored by the original authors but can be clearly seen in the x=0.4 curve as circled. This peak is also seen in an oxygen K-edge (Electron Energy loss spectroscopy) EELS 30 and was ignored there also. As we can see from figure 2, in addition to the oxygen states associated with peak E, there is also a small oxygen contribution associated with the empty spin-down e g states of the Ni 3+ ion.…”

Combustion synthesis and characterization of NiO nanoparticles

“…The organic matter is removed by ignition of the gel. The uniqueness and versatility of combustion synthesis are (1) it is an easy and fast process requiring less energy and time (2) the product is homogenous and crystalline with a high degree of purity [26][27][28]. In addition to the advantages of the method, the fuel (cassava starch) used in the present work, is natural, economical, abundant, easily available, the method of preparation does not require complicated procedures and most importantly, the oxidizer and fuel do not form a homogeneous solution that is expected to form in all solution combustion reaction.…”

“…Recent studies of nickel oxide nanoparticles (NiO NPs) prepared by a cost-effective and ecofriendly method have been used to evaluate its antimicrobial activity [14] and Manigandan et al used NiO NPs for photocatalytic degradation of Rhodamine B [15]. Various research groups have synthesized NiO NPs by the hydrothermal [16] solvothermal process [1], chemical precipitation [17], emulsion [18], solid state chemical decomposition [19] thermal decomposition [20,21] solgel [22] and reverse micro-emulsion method [23]. NiO synthesized by microwave thermal treatment by Cho et al has been used as an anode material in fuel cells [24].…”

“…One of the more extensively used transition metal oxides, nickel oxide (NiO), has a wide band gap [1] and varied applications [2]. They include catalysis [3], lithium ion batteries [4,5], smart windows [6], antiferromagnetic film [7], dye-sensitized photocathodes [8,9], photocatalysis [10], anti-microbial activity [11], thermal conductivity [12] and field emission studies.…”