ZnO/ITO core/shell nanostructure electrodes for future prototype solar cell devices

Devika, M.; Reddy, N. Koteeswara; Tu, C. W.

doi:10.1039/c4ra12581a

Cited by 4 publications

(3 citation statements)

References 74 publications

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“…The FFT (fast Fourier transform) pattern of the yellow region in Figure b as displayed in Figure d indicates three planes (002), (013), and (011) identified for hexagonal wurtzite (WZ) ZnO. The d spacings corresponding to the (002) and (011) planes were determined from the reconstructed HRTEM image of a nanocrystal (Figure c) as 0.26 and 0.25 nm, respectively Figure e indicates the atomic arrangement of Zn 2+ and O 2– ions in wurtzite ZnO along the [21̅0] viewing direction.…”

Section: Resultsmentioning

confidence: 99%

Efficient Charge Separation in Plasmonic ZnS@Sn:ZnO Nanoheterostructure: Nanoscale Kirkendall Effect and Enhanced Photophysical Properties

Paul

Ghosh

2018

Langmuir

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Tetravalent Sn doped ZnO nanocrystals show excellent plasmonic absorbance in the visible region. Plasmonic ZnS@Sn:ZnO core-shell heterostructures have been synthesized by the anion exchange process where the O is exchanged by S anion. An increase of sulfur concentration induces interior hollow structures arising from the different diffusion rates of O and S ions. Gradual transformation of wurtztie ZnO nanocrystals in the anion exchange process stabilizes the wurtzite crystalline phase of ZnS. Carrier concentration and various types of intrinsic defect states in both ZnO and ZnS result in ultraviolet, blue, and green emissions. The coexistence of exciton-plasmon coupling in the same nanoparticle and efficient electron-hole separation in type II heterostructure increases the photocatalytic activity and photo current gain.

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Section: Resultsmentioning

confidence: 99%

Efficient Charge Separation in Plasmonic ZnS@Sn:ZnO Nanoheterostructure: Nanoscale Kirkendall Effect and Enhanced Photophysical Properties

Paul

Ghosh

2018

Langmuir

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“…The grain boundaries create deep traps to slow the electron transport and may exist at the particulate electrode. 50 This nding also suggests that the excited electrons are collected efficiently in the external circuit. 50 To better understand the effects of the factors of crystalline quality and optical properties (NBE/DLE ratio) on the photocurrent for the ZnONPs, zinc oxide nanoparticles were synthesized without graphene oxide and in the presence of graphene oxide as shown in Table 4.…”

Section: Transient Photocurrent Response Of Znonps and Znonps+rgo Lmsmentioning

confidence: 96%

Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration

2015

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Zinc oxide-nanoparticles (ZnONPs)-reduced graphene oxide (rGO) composites with a high degree of crystallinity and a high dispersity were successfully synthesized via a one-pot, facile sol-gel method in a starch environment, during which the formation of zinc oxide nanoparticles, the reduction of graphene oxide and the loading of the ZnONPs onto the rGO surface occur simultaneously. Starch, as a natural capping agent, plays a significant role in controlling the degree of dispersion and coverage of the ZnONPs. The effect of rGO on the crystalline structure and optical properties of the ZnONPs was determined via X-ray diffraction, UV-visible diffused reflectance spectroscopy and photoluminescence spectroscopy. The ZnONPs+rGO composites exhibit excellent potential for photocurrent generation compared with pure ZnONPs under visible light irradiation, provided that efficient photo-induced charge separation and transportation can be achieved at the interface. The maximum photocurrent response, crystalline quality and factor optical properties (NBE/DLE ratio) were obtained for the ZnONPs+rGO composite with a 1.7% mass fraction of rGO, which is twice that achieved on pure ZnONPs.

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“…Transparent optoelectronic devices, owing to their functional scientific importance and practical applications in the fields of ultraviolet light-emitting diodes (UV-LEDs), 1 photodetectors, 2,3 thin-film transistors 4 and solar cells, 5 have increasingly received considerable attention. For these, transparent wide band gap materials with tunable morphology and wellcontrolled carrier concentration as the active layer, and transparent contacts are essentially necessary.…”

Section: Introductionmentioning

confidence: 99%

Semi-transparent all-oxide ultraviolet light-emitting diodes based on ZnO/NiO-core/shell nanowires

Shi

et al. 2016

Nanoscale

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Semi-transparent all-oxide light-emitting diodes based on ZnO/NiO-core/shell nanowire structures were prepared on double-polished c-Al2O3 substrates. The entire heterojunction diode showed an average transparency of ∼65% in the ultraviolet and visible regions. Under forward bias, the diode displayed an intense ultraviolet emission at ∼382 nm, and its electroluminescence performance was remarkable in terms of a low emission onset, acceptable operating stability, and the ability to optically excite emissive semiconductor nanoparticle chromophores.

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ZnO/ITO core/shell nanostructure electrodes for future prototype solar cell devices

Abstract: Crystalline ZnO/ITO core/shell nanostructures were developed and the devices fabricated with single NR showed excellent Ohmic characteristics under dark and light.

Cited by 4 publications

References 74 publications

Efficient Charge Separation in Plasmonic ZnS@Sn:ZnO Nanoheterostructure: Nanoscale Kirkendall Effect and Enhanced Photophysical Properties

Efficient Charge Separation in Plasmonic ZnS@Sn:ZnO Nanoheterostructure: Nanoscale Kirkendall Effect and Enhanced Photophysical Properties

Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration

Semi-transparent all-oxide ultraviolet light-emitting diodes based on ZnO/NiO-core/shell nanowires

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