Arrays of CZTS sensitized ZnO/ZnS and ZnO/ZnSe core/shell nanorods for liquid junction nanowire solar cells

Akram, Muhammad Aftab; Javed, Sofia; Islam, Mohammad; Mujahid, Mohammad; Safdar, Amna

doi:10.1016/j.solmat.2015.11.034

Cited by 45 publications

(9 citation statements)

References 47 publications

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“…Alloying CIS QDs with ZnS allowed the surface trap states to be passivated and the energy level positions to be tuned. , Only a small number of reports have used CZTS NCs in SSSCs. For example, Akram et al formed arrays of CZTS sensitized ZnO/ZnSe core/shell nanorods, which were subsequently annealed at 500 °C, and produced devices (FTO/ZnO/Al:ZnO/ZnSe/CZTS) with a PCE of 2.2% …”

Section: Photovoltaic Applicationsmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.

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Section: Photovoltaic Applicationsmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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“…Nanowires [1,2,3], nanorods (NRs) [4,5], nanobelts [6,7], and nanotubes [8] have shown good electronic or optoelectronic properties due to their special nanostructures, excellent crystallinities and oriented growth, significant quantum size effect, and optical non-linearity [9]. Among these, zinc oxide (ZnO) NRs are widely applied in the fields of sensors [4,10,11,12,13,14], photocatalysis [13], solar cells [15,16], UV photodetectors [17,18], and field emission devices [19] due to their wide band gap (3.37 eV), high binding exciton energy (60 meV), excellent electricity properties, and low cost [20,21]. Compared with bulk ZnO materials, ZnO nanorod arrays have a large specific surface area and strong electronic transmission capability [22].…”

Section: Introductionmentioning

confidence: 99%

Heterostructured NiO/ZnO Nanorod Arrays with Significantly Enhanced H2S Sensing Performance

et al. 2019

Nanomaterials

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H2S gas sensors were fabricated using p-n heterojunctions of NiO/ZnO, in which the ZnO nanorod arrays were wrapped with NiO nanosheets via a hydrothermal synthesis method. When the H2S gas molecules were adsorbed and then oxidized on the ZnO surfaces, the free electrons were released. The increase in the electron concentration on the ZnO boosts the transport speed of the electrons on both sides of the NiO/ZnO p-n junction, which significantly improved the sensing performance and selectivity for H2S detection, if compared with sensors using the pure ZnO nanorod arrays. The response to 20 ppm of H2S was 21.3 at 160 °C for the heterostructured NiO/ZnO sensor, and the limit of detection was 0.1 ppm. We found that when the sensor was exposed to H2S at an operating temperature below 160 °C, the resistance of the sensor significantly decreased, indicating its n-type semiconductor nature, whereas when the operating temperature was above 160 °C, the resistance significantly increased, indicating its p-type semiconductor nature. The sensing mechanism of the NiO/ZnO heterostructured H2S gas sensor was discussed in detail.

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“…substrates, and synthesis occurred via the reflux method and PbS thin films were deposited by the SILAR (successive ionic layer adsorption and reaction) method (Khot et al, 2015). Liquid Junction solar cells based on ZnO/Al:ZnO/ZnS or ZnSe/CZTS (Copper-zinc-tin-sulfide), lead to efficient photon absorption and shorter pathways for charge transport (Akram et al, 2016). A one-dimensional nanoarray of ZnO/CuIn x Ga 1−x Se 2 allows for better carrier separation and transport without using a toxic CdS buffer layer (Akram et al, 2015).…”

Section: Modification Of Zinc Oxide Nanorodsmentioning

confidence: 99%

A Review on Synthesis and Optoelectronic Applications of Nanostructured ZnO

2021

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Nanostructured ZnO has gained a lot of interest as a suitable material for various applications, especially sensing, energy conversion, and storage. ZnO nanostructures can be synthesized in several ways. It is one of the materials that can be prepared in a variety of morphologies including hierarchical nanostructures. This review article presents a review of current research activities on the growth of ZnO Nanorods. The article covers various water-based routes of synthesis and is further characterized by the type of substrate used for the growth. The growth factors involved in the hydrothermal and chemical bath deposition methods are discussed. These factors include the variety of precursors, time, temperature, and the seeding method employed. At the end, applications such as gas sensing and improvement in Opto-electric properties are discussed.

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Arrays of CZTS sensitized ZnO/ZnS and ZnO/ZnSe core/shell nanorods for liquid junction nanowire solar cells

Cited by 45 publications

References 47 publications

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

Heterostructured NiO/ZnO Nanorod Arrays with Significantly Enhanced H2S Sensing Performance

A Review on Synthesis and Optoelectronic Applications of Nanostructured ZnO

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