Hierarchical growth of TiO2 nanosheets on anodic ZnO nanowires for high efficiency dye-sensitized solar cells

Miles, David O.; Lee, Chang‐Soo; Cameron, Petra J.; Mattia, Davide; Kim, Jong Hak

doi:10.1016/j.jpowsour.2016.06.033

Cited by 20 publications

(7 citation statements)

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“…Nanostructured Zn/ZnO for PV and PEC applications was obtained in bicarbonate media under low voltage (5–10 V) for shorter times (10–30 min) [ 73 , 74 ]. Heat treatment is required to crystallize the oxide (300 °C for 1 h) [ 75 ]. Zn/ZnO-hexagonal pyramid array for a Zn-ion battery anode was created by Kim et al [ 76 ] by applying pulsed-galvanostatic anodization in an aqueous solution containing NH 4 Cl and H 2 O 2 .…”

Section: General Aspects Of Anodic Oxide Synthesis For Energy Applmentioning

confidence: 99%

“…The use of hierarchical nanostructures of the core-shell type also allows one to optimize the electron transport provided by the nanowire core and obtain a high surface area, chemical stability, and compatibility with several dyes and electrolytes [ 75 ]. Compared with conventional DSSC devices, Millers et al [ 75 ] observed a 29% higher conversion efficiency when a ZnO@TiO 2 photoelectrode was employed. In this case, the anodization technique was used to produce ZnO nanowires using Zn foil as a precursor.…”

Section: Photovoltaic Devices For Energy Conversion: Solar Cellsmentioning

confidence: 99%

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The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

et al. 2021

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This review addresses the main contributions of anodic oxide films synthesized and designed to overcome the current limitations of practical applications in energy conversion and storage devices. We present some strategies adopted to improve the efficiency, stability, and overall performance of these sustainable technologies operating via photo, photoelectrochemical, and electrochemical processes. The facile and scalable synthesis with strict control of the properties combined with the low-cost, high surface area, chemical stability, and unidirectional orientation of these nanostructures make the anodized oxides attractive for these applications. Assuming different functionalities, TiO2-NT is the widely explored anodic oxide in dye-sensitized solar cells, PEC water-splitting systems, fuel cells, supercapacitors, and batteries. However, other nanostructured anodic films based on WO3, CuxO, ZnO, NiO, SnO, Fe2O3, ZrO2, Nb2O5, and Ta2O5 are also explored and act as the respective active layers in several devices. The use of AAO as a structural material to guide the synthesis is also reported. Although in the development stage, the proof-of-concept of these devices demonstrates the feasibility of using the anodic oxide as a component and opens up new perspectives for the industrial and commercial utilization of these technologies.

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Section: General Aspects Of Anodic Oxide Synthesis For Energy Applmentioning

confidence: 99%

Section: Photovoltaic Devices For Energy Conversion: Solar Cellsmentioning

confidence: 99%

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

et al. 2021

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“…High PCE of 6.31% was attributed to NH 3 treatment, which was believed to create ZnO shell on SnO 2 nanoparticles [74]. A hierarchical core-shell ZnO NW with TiO 2 nanosheets resulted in an outstanding performance with a solid-state electrolyte, showing the conversion efficiencies of up to 7.46% [75].…”

Section: Nanowires -New Insightsmentioning

confidence: 99%

ZnO Nanowires for Dye Sensitized Solar Cells

Račkauskas¹,

Barbero²,

Barolo³

et al. 2017

Nanowires - New Insights

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This chapter provides a broad review of the latest research activities focused on the synthesis and application of ZnO nanowires (NWs) for dye-sensitized solar cells (DSCs) and composed of three main sections. The first section briefly introduces DSC-working principles and ZnO NW application advantages and stability issues. The next section reviews ZnO NW synthesis methods, demonstrating approaches for controlled synthesis of different ZnO NW morphology and discussing how this effects the overall efficiency of the DSC. In the last section, the methods for ZnO NW interface modification with various materials are discussed, which include ZnO core-shell structures with semiconductive or protective layers, ZnO NW hybrid structures with other materials, such as nanoparticles, quantum dots and carbon nanomaterials and their benefit for charge and light transport in DSCs. The review is concluded with some perspectives and outlook on the future developments in the ZnO nanowire application for DSCs.

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“…10,18,38−42 A core− shell heterostructure, typically forming from a one-dimensional structure, offers a large interfacial area for rapid charge carrier separation, short diffusion length, better absorption of light, improved charge carrier transport, and collection efficiency. 43,44 There are some examples of core−shell heterostructures used for solar energy-related applications, which include ZnO-Al 2 O 3 and ZnO-TiO 2 core−shell NWs in DSCs, 45 ZnO and SnO 2 surrounded by a TiO 2 nanosheet shell in DSSCs, 41,46 p-type Fe 2 O 3 -based photocathode with a multiheterojunction and TiO 2 coating, 47 ZnO-Fe 2 O 3 core−shell NWAs, 48 1D ZnO-BiVO 4 heterojunction, 49 Si-ZnO core−shell NWAs, 50 ZnO-TiO 2 core−shell NWs, 51,52 and ZnO-TiO 2 core-brush nanostructures 53 for photocatalytic/PEC water splitting applications. Therefore, suitable, well-ordered development of a 1D core− shell structure with ideal semiconductors is key to amending the PEC properties.…”

Section: ■ Introductionmentioning

confidence: 99%

ZnO-TiO₂ Core–Shell Nanowires: A Sustainable Photoanode for Enhanced Photoelectrochemical Water Splitting

Jeong

Deshmukh

Park

et al. 2018

ACS Sustainable Chem. Eng.

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We present the synthesis of a unique vertically aligned ZnO-TiO2 core–shell nanowires (NWs) heterostructure on an Si-wafer using a chemical vapor deposition method. The structural study shows the well-developed ZnO-TiO2 core–shell NWs heterostructure. This unique ZnO-TiO2 core–shell NWs heterostructure displays a photocurrent density of 1.23 mA cm–2, which is 2.41 times higher than pristine ZnO NWs. A cathodic shift in the flat band potential and a lower onset potential of a ZnO-TiO2 core–shell NWs heterostructure over ZnO NWs indicates more favorable properties for photoelectrochemical water splitting with a photoconversion efficiencey of 0.53%. A higher photocurrent density/photoconversion efficiency is due to the effective addition of photogenerated electron–hole separation originating from the ZnO NWs core and the conformal covering of a amorphous TiO2 passivation shell. Therefore, these results suggest that the vertically aligned one-dimentional ZnO-TiO2 core–shell NWs heterostructure is a promising photoanode for solar energy conversion devices.

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Hierarchical growth of TiO2 nanosheets on anodic ZnO nanowires for high efficiency dye-sensitized solar cells

Cited by 20 publications

References 59 publications

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

ZnO Nanowires for Dye Sensitized Solar Cells

ZnO-TiO₂ Core–Shell Nanowires: A Sustainable Photoanode for Enhanced Photoelectrochemical Water Splitting

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Hierarchical growth of TiO2 nanosheets on anodic ZnO nanowires for high efficiency dye-sensitized solar cells

Cited by 20 publications

References 59 publications

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

ZnO Nanowires for Dye Sensitized Solar Cells

ZnO-TiO2 Core–Shell Nanowires: A Sustainable Photoanode for Enhanced Photoelectrochemical Water Splitting

Contact Info

Product

Resources

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ZnO-TiO₂ Core–Shell Nanowires: A Sustainable Photoanode for Enhanced Photoelectrochemical Water Splitting