Enhancing the ultraviolet photosensing properties of nickel oxide thin films by Zn–La co-doping

Raj, I. Loyola Poul; Valanarasu, S.; Ade, Ramesh; Bitla, Yugandhar; Mohanraj, P.; Ganesh, V.; Yahia, I.S.

doi:10.1016/j.ceramint.2021.11.040

Cited by 21 publications

(3 citation statements)

References 74 publications

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“…There have been previous reports on double doping of NiO with either anion-cation dopants like NiO:(Fe,F) [49], NiO:(Cu,N) [50] or cation-cation dopants like NiO:(Zn,La) [51], NiO:(Li,Mg) [52], NiO:(Fe,Co) [53], NiO:(Zn,Mg) [54], NiO:(Pb,Ir) [55] for enhancing its properties as electrode, catalyst, dielectric or magnet. However, it is the first time that the effect of anion and cation co-doping of NiO has been explored to show enhanced ultraviolet photovoltaic performance when forming a p/n heterojunction with TiO2.…”

Section: Properties Of Nio:(nbn)/tio2 Heterostructurementioning

confidence: 99%

Anion and Cation Co-doping of NiO for Transparent Photovoltaics and Smart Window Applications

Aivalioti,

Manidakis,

Pelekanos

et al. 2024

Preprint

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Materials engineering based on metal oxides for manipulating the solar spectrum and producing solar energy have been under intense investigation over the last years. In this work, we present NiO thin films double-doped with niobium (Nb) and nitrogen (N) as cation and anion dopants (NiO:(Nb,N)) to be used as p-type layers in all oxide transparent solar cells. The films were grown by sputtering a composite Ni-Nb target on room-temperature substrates in plasma containing 50% Ar, 25% O2 and 25% N2 gases. The existence of Nb and N dopants in the NiO structure was confirmed by the Energy Dispersive X-Ray and X-Ray Photoelectron Spectroscopy techniques. The nominally undoped NiO film, which was deposited by sputtering a Ni target and used as the reference film, was oxygen-rich, single-phase cubic NiO, having a visible transmittance of less than 20%. Upon double doping with Nb and N the visible transmittance of NiO:(Nb,N) film increased to 60%, which was further improved after thermal treatment to around 85%. The respective values of the direct band gap in the undoped and double-doped films were 3.28 eV and 3.73 eV just after deposition and 3.67 eV and 3.76 eV after thermal treatment. The changes in the properties of the films such as structural disorder, direct and indirect energy band gaps, Urbach tail states and resistivity were correlated with the incorporation of Nb and N in their structure. The thermally treated NiO:(Nb,N) film was used to form a diode with a spin-coated two-layer, mesoporous on top of a compact, TiO2 film. The NiO:(Nb,N)/TiO2 heterojunction exhibited visible transparency of around 80%, showed rectifying characteristics and the diode’s parameters were deduced using the I-V method. The diode revealed photovoltaic behavior upon illumination with UV light exhibiting a short circuit current density of 0.2 mA/cm2 and open-circuit voltage of 500 mV. Improvements of the output characteristics of the NiO:(Nb,N)/TiO2 UV-photovoltaic by proper engineering of the individual layers and device processing procedures are addressed. Transparent NiO:(Nb,N) films can be potential candidates in all-oxide ultraviolet photovoltaics for tandem solar cells, smart windows and other optoelectronic devices.

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Section: Properties Of Nio:(nbn)/tio2 Heterostructurementioning

confidence: 99%

Anion and Cation Co-doping of NiO for Transparent Photovoltaics and Smart Window Applications

Aivalioti,

Manidakis,

Pelekanos

et al. 2024

Preprint

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“…In Table 2 the role of Zn as a dopant is exemplified for SG films, as pointed out by recent works. The examples above can be expanded with films prepared by other methods than SG, such as: Spray pyrolysis [179][180][181][182][183]; Chemical bath deposition [184][185][186]; thermally vacuum evaporation [187], and others [188][189][190]. When oxide layers are doped with Zn, their concentration plays an important role in improving parameters in various applications.…”

Section: Zn As Dopantmentioning

confidence: 99%

Various Applications of ZnO Thin Films Obtained by Chemical Routes in the Last Decade

et al. 2023

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This review addresses the importance of Zn for obtaining multifunctional materials with interesting properties by following certain preparation strategies: choosing the appropriate synthesis route, doping and co-doping of ZnO films to achieve conductive oxide materials with p- or n-type conductivity, and finally adding polymers in the oxide systems for piezoelectricity enhancement. We mainly followed the results of studies of the last ten years through chemical routes, especially by sol-gel and hydrothermal synthesis. Zinc is an essential element that has a special importance for developing multifunctional materials with various applications. ZnO can be used for the deposition of thin films or for obtaining mixed layers by combining ZnO with other oxides (ZnO-SnO2, ZnO-CuO). Also, composite films can be achieved by mixing ZnO with polymers. It can be doped with metals (Li, Na, Mg, Al) or non-metals (B, N, P). Zn is easily incorporated in a matrix and therefore it can be used as a dopant for other oxidic materials, such as: ITO, CuO, BiFeO3, and NiO. ZnO can be very useful as a seed layer, for good adherence of the main layer to the substrate, generating nucleation sites for nanowires growth. Thanks to its interesting properties, ZnO is a material with multiple applications in various fields: sensing technology, piezoelectric devices, transparent conductive oxides, solar cells, and photoluminescence applications. Its versatility is the main message of this review.

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“…Thus, applications of NiO films is progressively expanding across multidisciplinary fields. Consequently, research on NiO films are being actively ongoing to enhance the properties of NiO films and unlock new possibilities [ [31] , [32] , [33] ]. However, the authors of this present work aim to fabricate NiO films adopting a simple, inexpensive, and homemade spray pyrolysis technique with the addition of Manganese (Mn) and Zinc (Zn) as dopant elements.…”

Section: Introductionmentioning

confidence: 99%

The prospect of spray pyrolyzed pure, Mn-doped, and Zn-doped nickel oxide thin films as TCO material

Begum,

Islam,

Ara

et al. 2024

Heliyon

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Enhancing the ultraviolet photosensing properties of nickel oxide thin films by Zn–La co-doping

Cited by 21 publications

References 74 publications

Anion and Cation Co-doping of NiO for Transparent Photovoltaics and Smart Window Applications

Anion and Cation Co-doping of NiO for Transparent Photovoltaics and Smart Window Applications

Various Applications of ZnO Thin Films Obtained by Chemical Routes in the Last Decade

The prospect of spray pyrolyzed pure, Mn-doped, and Zn-doped nickel oxide thin films as TCO material

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