Synthesis and photovoltaic effect of vertically aligned ZnO/ZnS core/shell nanowire arrays

Wang, K.; Chen, J. J.; Zeng, Zhi; Tarr, J.; Zhou, Wei; Zhang, Y.; Yan, Yuxing; Jiang, Chengming; Pern, J.; Mascarenhas, A.

doi:10.1063/1.3367706

Cited by 136 publications

(98 citation statements)

References 19 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The need for higher solar cell effi ciencies at lower cost has become apparent, and at the same time, synthetic control in nanoscience has been improved, making the existence of high-performance electronic devices possible [69][70][71][72]. Functioning nanowire PVs have been fabricated using a wide variety of materials including silicon, germanium, zinc oxide, zinc sulfi de, cadmium telluride, cadmium selenide, copper oxide, titanium oxide, gallium nitride, indium gallium nitride, gallium arsenide, indium arsenide, and many polymer/nanowire combinations [73][74][75][76][77][78][79][80][81][82][83][84][85][86]. Output effi ciencies have steadily increased, so that most of the material systems achieved effi ciencies higher than 1% with some close to 10%, but a number of unresolved questions must be answered before such materials can be used in commercial devices.…”

Section: Organic Solar Cells and Nanowire Solar Cellsmentioning

confidence: 99%

State‐of‐the‐Art of Nanostructures in Solar Energy Research

Sagadevan¹

2014

Advanced Energy Materials

View full text Add to dashboard Cite

The world's major energy sources are non-renewable and are faced with an ever-increasing demand, and hence are not expected to last long. Besides being non-renewable, these sources include mainly fossil fuels, and contribute tremendously to the perennial problem of global warming. The serious depletion and pollution problems of the above energy sources have made the international community focus attention on alternative sources of energy, especially solar energy, which appears highly promising. Nanostructure-based solar energy is attracting signifi cant attention as a possible candidate for achieving drastic improvement in photovoltaic energy conversion effi ciency. Although such solar energy is expected to be more expensive, there is a growing need for effi cient and lightweight solar cells in aerospace and related industries. It is certain to rule the energy sector when break-even, of high performance is achieved and its cost becomes comparable with that of other energy sources. Various approaches have been proposed to enhance the effi ciency of solar cells. Applications of nanotechnology help us to design solar devices more economically. Nanophotovoltaic cells are used to create cost, effective, effi cient, solar energy storage systems or solar energy on a large scale. Nanostructured materials contain structures with dimensions in that scale; they include polycrystalline materials with nanometer-sized crystallites, materials with surface protrusions spatially separated by a few nanometers granular or porous materials with grain sizes in the nanometer range or nanometer-sized metallic clusters embedded in a dielectric matrix. The motivation for using nanostructured materials emerges from their specifi c physical and chemical properties. Enhancing the regular crystalline

show abstract

Section: Organic Solar Cells and Nanowire Solar Cellsmentioning

confidence: 99%

State‐of‐the‐Art of Nanostructures in Solar Energy Research

Sagadevan¹

2014

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…Many studies have been made from worldwide research groups in type-II coaxial nanowire growth and photovoltaic applications [52][53][54][55][56][57][58]. Zhang's group fabricated the vertically aligned ZnO/ZnSe and ZnO/ZnS core/shell NWAs by CVD method [42,59], and investigated the photovoltaic effect of the ZnO/ZnS NWA. Lee's group synthesized ZnO/ZnSe heterostructure NWAs with different morphologies through solutionbased surface modifications [54,55].…”

Section: Fabrication Of Type-ii Core/shell Nanowire-based Solar Cellsmentioning

confidence: 99%

Type-II Core/Shell Nanowire Heterostructures and Their Photovoltaic Applications

Cao

et al. 2012

Nano-Micro Lett.

View full text Add to dashboard Cite

Nanowire-based photovoltaic devices have the advantages over planar devices in light absorption and charge transport and collection. Recently, a new strategy relying on type-II band alignment has been proposed to facilitate efficient charge separation in core/shell nanowire solar cells. This paper reviews the type-II heterojunction solar cells based on core/shell nanowire arrays, and specifically focuses on the progress of theoretical design and fabrication of type-II ZnO/ZnSe core/shell nanowire-based solar cells. A strong photoresponse associated with the type-II interfacial transition exhibits a threshold of 1.6 eV, which demonstrates the feasibility and great potential for exploring all-inorganic versions of type-II heterojunction solar cells using wide bandgap semiconductors. Future prospects in this area are also outlooked.

show abstract

“…Both the ZnO/ZnS and CdSe/ZnTe core-shell nanowires which have type II alignment exhibit an efficient broad band UV/visible photoresponse. 132,133 The piezoelectric effect of ZnO and CdSe makes the two types of core-shell structures excellent candidates for piezo-phototronic effect devices. Fig.…”

Section: Three-dimensional Core-shell Nanowire Array Photodetectormentioning

confidence: 99%

Progress in piezo-phototronic effect enhanced photodetectors

et al. 2016

View full text Add to dashboard Cite

Wurtzite structured materials such as InN, CaN, ZnO, and CdSe simultaneously possess piezoelectric, semiconducting, and photoexcitation properties. The piezo-phototronic effect utilizes the piezo-polarization charges induced in the vicinity of the interface/junction to regulate the energy band diagrams and modulate charge carriers in the optoelectronic processes, such as transport, generation, recombination, and separation. This article reviews recent progress in piezo-phototronic effect enhanced photodetectors, starting from the fundamental physics, following the development from a single nanowire device to a large-scale photodetector array for illumination imaging. The piezo-phototronic effect provides a promising approach to improve the performance of the wurtzite structured material-based photodetectors. It may have potential applications in optical communication, optoelectronic devices, and multifunctional computing systems.

show abstract

Synthesis and photovoltaic effect of vertically aligned ZnO/ZnS core/shell nanowire arrays

Cited by 136 publications

References 19 publications

State‐of‐the‐Art of Nanostructures in Solar Energy Research

State‐of‐the‐Art of Nanostructures in Solar Energy Research

Type-II Core/Shell Nanowire Heterostructures and Their Photovoltaic Applications

Progress in piezo-phototronic effect enhanced photodetectors

Contact Info

Product

Resources

About