Adsorption effect of NO2 on ZnO (100 nm) nanowires, leading towards reduced reverse leakage current and voltage enhancement

Ahmad, Mansoor; Nayan, Nafarizal; Soon, Chin Fhong; Suriani, A. B.; Mohamed, Azmi; Mamat, M. H.; Iqbal, Muhammad Azhar; Jabeen, Musarrat

doi:10.1007/s12034-020-02237-w

Cited by 5 publications

(6 citation statements)

References 39 publications

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“…VING has been oxidized for 5 h in a sealed chamber at 100 ppm to obtain maximum output voltage. The oxidation phenomenon has been very well explained in our earlier reports [15][16][17][18], which has significantly reduced the screening effect during external compression.…”

Section: Methodssupporting

confidence: 74%

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Effects of Group-I Elements on Output Voltage Generation of ZnO Nanowires Based Nanogenerator; Degradation of Screening Effects by Oxidation of Nanowires

et al. 2022

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Here, we report the successful incorporation of group I elements (K, Na, Li) to ZnO nanowires. Three distinct (2, 4, and 6 wt.%) doping concentrations of group I elements have been used to generate high piezoelectric voltage by employing a vertically integrated nanowire generator (VING) structure. X-ray photoelectron spectra (XPS) indicated the seepage of dopants in ZnO nanowires by substitution of Zn. Shallow acceptor levels (LiZn, NaZn, KZn) worked as electron trapping centers for intrinsically n-type ZnO nanowires. Free moving electrons caused a leakage current through the nanowires and depleted their piezoelectric potential. Reverse leakage current is a negative factor for piezoelectric nanogenerators. A reduction in reverse leakage current signifies the rise in output voltage. A gradual rise in output voltage has been witnessed which was in accordance with various doping concentrations. K-doped ZnO nanowires have generated voltages of 0.85 V, 1.48 V, and 1.95 V. For Na-doped ZnO nanowires, the voltages were 1.23 V, 1.73 V, and 2.34 V and the voltages yeilded for Li-doped ZnO nanowires were 1.87 V, 2.63 V, and 3.54 V, respectively. Maximum voltage range has been further enhanced by the surface enrichment (oxidized with O2 molecules) of ZnO nanowires. Technique has been opted to mitigate the screening effect during an external stress. After 5 h of oxidation in a sealed chamber at 100 ppm, maximum voltage peaks were pronounced to 2.48 V, 3.19 V, and 4.57 V for K, Na, and Li, respectively. A low-cost, high performance mechanical transducer is proposed for self-powered devices.

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Section: Methodssupporting

confidence: 74%

“…could be grown efficiently under ambient conditions. ZnO nanowire-based piezoelectric nanogenerators [17][18][19] have been the core area of our research and this recent attempt is a continuation of our endeavors in this area. ZnO in its wurtzite structure exhibits a lack of any central symmetry.…”

Section: Introductionmentioning

confidence: 99%

Effects of Group-I Elements on Output Voltage Generation of ZnO Nanowires Based Nanogenerator; Degradation of Screening Effects by Oxidation of Nanowires

et al. 2022

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“…Owing the facts from our earlier reported [15][16][17] values of oxidized ZnO nanowires at room temperature.…”

Section: Resultsmentioning

confidence: 83%

“…ZnO nanowires based nanogenerators has always been our area of interest, especially vertically integrated nanowire generators (VING). We have not only used VING to produce high piezoelectric voltages but also exposed the surface of ZnO nanowires surface to various oxidizing gases to generate further high piezoelectric voltage [15][16][17]. To understand the mechanism of VING, the role of schottky barrier is very crucial.…”

Section: Introductionmentioning

confidence: 99%

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Effects of grain size and temperature, on the output voltage generation of Energy harvester using ZnO nanowires (oxidized with O2).

Ahmad

Nayan

et al. 2021

Preprint

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Here, we report high output voltage generation via oxidized ZnO nanowires. A thorough study has been carried out to observe the behavior of ZnO nanowires under reduced grain size and high temperature conditions. Study has revealed that piezoelectric output voltage generated by ZnO based VING (vertically integrated nanowire generator) has been gradually increased, as the diameter of nanowires is decreased. Secondly, it has also been observed that maximum peak voltage has been further enhanced, if nanowires are oxidized at high temperature. ZnO nanowires ̴ 200 nm have produced maximum peak voltage 2.283 V at room temperature and if oxidized at 200o C then output voltage has been further raised to 2.638 V Having output power density 365.7 mW/cm2, similarly ̴ 100 nm ZnO nanowires have produced maximum voltage of 2.598 V At room temperature and at 200o C the value is elevated to 2.835 V and ̴ 50 nm ZnO nanowires have generated 3.38 V at room temperature and when oxidized at 200o C voltage has been raised to 3.465 V with power density of 511.3 mW/cm2. The values have been significantly improved by our earlier reported values.

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Nitrogen-doped reduced graphene oxide (N-rGO) three-dimensional electrode electrochemically activates persulfate for the degradation of tetracycline

Liu,

Zhang

2024

Carbon Lett.

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Adsorption effect of NO2 on ZnO (100 nm) nanowires, leading towards reduced reverse leakage current and voltage enhancement

Cited by 5 publications

References 39 publications

Effects of Group-I Elements on Output Voltage Generation of ZnO Nanowires Based Nanogenerator; Degradation of Screening Effects by Oxidation of Nanowires

Effects of Group-I Elements on Output Voltage Generation of ZnO Nanowires Based Nanogenerator; Degradation of Screening Effects by Oxidation of Nanowires

Effects of grain size and temperature, on the output voltage generation of Energy harvester using ZnO nanowires (oxidized with O2).

Nitrogen-doped reduced graphene oxide (N-rGO) three-dimensional electrode electrochemically activates persulfate for the degradation of tetracycline

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