Excellent piezoelectric and electrical properties of lithium-doped ZnO nanowires for nanogenerator applications

Chang, Yu Tsui; Chen, Jui Yuan; Yang, Tzu Ping; Huang, Chun Wei; Chiu, Chung Hua; Yeh, Ping Hung; Wu, Wen‐Wei

doi:10.1016/j.nanoen.2014.06.014

Cited by 51 publications

(28 citation statements)

References 27 publications

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“…They found that the (ZnO) x (MgO) 1-x nanoplates would be reasonable candidates for the treatment of polluted water due to their superior photocatalytic performance on the degradation of methyl orange (MO). More recently, the applications of ultrathin piezoelectric AlN films and lithium-doped ZnO nanowires for nanoelectromechanical relays with millivolt switching capability [6] and nanogenerators [7] have been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale mass detection based on vibrating piezoelectric ultrathin films under thermo-electro-mechanical loads

Asemi

Farajpour

et al. 2015

Physica E: Low-dimensional Systems and Nanostructures

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Section: Introductionmentioning

confidence: 99%

Nanoscale mass detection based on vibrating piezoelectric ultrathin films under thermo-electro-mechanical loads

Asemi

Farajpour

et al. 2015

Physica E: Low-dimensional Systems and Nanostructures

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“…This leads to improved piezoelectric properties 26 together with the appearance of ferroelectric phenomena 11 27 . Recently, different elements like Sb 11 , Fe 28 , Li 29 , Cr 30 have been proposed for the synthesis of reliable p-type doped ZnO specimens. These have amplified piezoelectric coefficients as high as a hundred pm·V −1 , making their piezoelectric performances comparable with those observed for sputtered PZT thin films 31 32 .…”

mentioning

confidence: 99%

Lead-free piezoelectrics: V3+ to V5+ ion conversion promoting the performances of V-doped Zinc Oxide

Laurenti

Castellino

Perrone

et al. 2017

Sci Rep

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Vanadium doped ZnO (VZO) thin films were grown by RF magnetron sputtering, starting from a ZnO:V ceramic target. The crystal structure, chemical composition, electric and piezoelectric properties of the films were investigated either on the as-grown thin films or after a post-deposition rapid thermal annealing (RTA) treatment performed at 600 °C for different lengths of time (1 and 5 min) in an oxygen atmosphere. Substitutional doping of Zn2+ with V3+ and V5+ ions strongly deteriorated the hexagonal wurtzite ZnO structure of the as-grown thin films due to lattice distortion. The resulting slight amorphization led to a poor piezoelectric response and higher resistivity. After the RTA treatment, strong c-axis oriented VZO thin films were obtained, together with a partial conversion of the starting V3+ ions into V5+. The improvement of the crystal structure and the stronger polarity of both V3+ – O and V5+ – O chemical bonds, together with the corresponding easier rotation under the application of an external electric field, positively affected the piezoelectric response and increased conductivity. This was confirmed by closed-loop butterfly piezoelectric curves, by a maximum d33 piezoelectric coefficient of 85 pm·V−1, and also by ferroelectric switching domains with a well-defined polarization hysteresis curve, featuring a residual polarization of 12.5 μC∙cm−2.

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“…The quantity of converted energy is generally in the order of µW up to few mW, thus suitable for the supply to small and portable electronics . More recently, the piezoelectric properties of ZnO‐based materials were further improved by p‐type doping . However, at present, the ZnO p‐type conduction and the control over the metal/semiconductor junction formation (including both Schottky and Ohmic contacts) remain a challenge.…”

Section: Introductionmentioning

confidence: 99%

Surface Engineering of Nanostructured ZnO Surfaces

Laurenti

Stassi

Canavese

et al. 2016

Adv Materials Inter

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are oriented in one direction and their assembly and stacking produces the wurtzite hexagonal symmetry. The noncentrosymmetric and anisotropic crystalline structure of wurtzite-like ZnO generates very interesting properties such as piezo-and pyro-electricity: the application of an external stimulus, like mechanical stress or temperature, deforms the tetrahedron structure. This deformation results in a separation between the positive and negative centers of charge, inducing the formation of a dipole moment. [7,8] The polar surface and anisotropic structure of ZnO can be usefully exploited to form different kinds of micro and nanostructures from 0D to 3D, [5] including, but not limited to nanowires, [9][10][11][12] nanotubes, [13,14] nanobelts, [15][16][17][18][19] nanorings, [20] flower-like morphologies, [21][22][23][24][25] multipods, [26,27] tetrapods, [28][29][30] sponge-like structures [31][32][33][34] and so on [29,[35][36][37][38][39] (Figure 1). Therefore, several research efforts have been invested in studying various preparation procedures for ZnO micro and nano-materials. Wet chemical approaches, like sol-gel, hydrothermal growths, electrodeposition and template-assisted routes, [40,41] as well as vapor-phase methods, for example chemical vapour deposition (CVD), physical vapour deposition (PVD) including sputtering and evaporation approaches, [42][43][44] and epitaxial growth methods [45] are among the most used ones. The great advantages of the wet chemical approaches are the high synthesis versatility, low temperature employed and low costs. [9] From the other side, dry methods take advantage of the high quality and excellent control over the level of crystallinity of the synthesized ZnO structures, as well as the absence of contamination and high purity of the final material. [46] The combination of different properties with the ease and high versatile synthesis of ZnO material in different micro and nanostructures offers a huge possibility of potential applications.For example, ZnO is already used as an efficient catalyst in the selective oxidation of involving oxygenates (i.e., alcohols, aldehydes, and carboxylic acids) and in methanol synthesis catalysts. It is also largely applied as protective, anti-corrosion layer in galvanized steel products, [49][50][51] as well as in paints and sunscreens as an UV absorber. Its biocompatibility makes this material suitable, in the form of microparticles, for paste formulations in cosmetic applications.The combination of the piezoelectric with the semiconducting properties of ZnO is found to result into new exciting physical properties, [52][53][54] and it has recently opened the research field to energy harvesting application. ZnO nanomaterials can be thus used as nanogenerators, able to convert the mechanical deformation from the surrounding environment into electrical Zinc Oxide (ZnO) nanostructures represent promising substrate materials for numerous applications, ranging from new generation solar cells, to bio-and chemical sensors. This interest is due ...

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Excellent piezoelectric and electrical properties of lithium-doped ZnO nanowires for nanogenerator applications

Cited by 51 publications

References 27 publications

Nanoscale mass detection based on vibrating piezoelectric ultrathin films under thermo-electro-mechanical loads

Nanoscale mass detection based on vibrating piezoelectric ultrathin films under thermo-electro-mechanical loads

Lead-free piezoelectrics: V3+ to V5+ ion conversion promoting the performances of V-doped Zinc Oxide

Surface Engineering of Nanostructured ZnO Surfaces

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