Control of a- and c-plane preferential orientations of ZnO thin films

Cho, Dae‐Hyung; Kim, Ji Eun; Moon, Byung Moo; Jo, Yeong Deuk; Koo, Sang Man

doi:10.1016/j.apsusc.2008.09.073

Cited by 25 publications

(5 citation statements)

References 21 publications

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“…Recently, many theoretical and experimental studies concerning other crystalline planes such as (110)-and (100)-faceted ZnO films have also been carried out by many researchers. It is found that different crystalline orientations possess different electronic [35], optical [36], and acoustic [37,38] properties. The XRD patterns well agree with those reported in the literature [39,40].…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Photovoltaic Performance of ZnO Nanosheets Solar Cell Sensitized with Beta-Substituted Porphyrin

Mahesh

2011

Journal of Nanomaterials

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The photoanode of dye-sensitized solar cell (DSSC) was fabricated using two-dimensional ZnO nanosheets (2D ZnO NSs) sensitized with beta-substituted porphyrins photosensitizer, and its photovoltaic performance in solid-state DSSC with TiO2nanotubes (TiO2TNs) modified poly (ethylene oxide) (PEO) polymer electrolyte was studied. The ZnO NSs were synthesized through hydrothermal method and were characterized through high-resolution scanning electron microscopy (HRSEM), diffused reflectance spectra (DRS), photoluminescence spectra (PL), and X-ray diffraction (XRD) analysis. The crystallinity of the polymer electrolytes was investigated using X-ray diffraction analysis. The photovoltaic performance of the beta-substituted porphyrins sensitized solar cells was evaluated under standard AM1.5G simulated illumination (100 mW cm−2). The efficiency of energy conversion from solar to electrical due to 2D ZnO NSs based DSSCs is 0.13%, which is about 1.6 times higher than that of the control DSSC using ZnO nanoparticles (ZnO NPs) as photoanode (0.08%), when TiO2NTs fillers modified PEO electrolyte was incorporated in the DSSCs. The current-voltage () and photocurrent-time () curves proved stable with effective collection of electrons, when the 2D ZnO nanostructured photoanode was introduced in the solid-state DSSC.

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Section: X-ray Diffraction Analysismentioning

confidence: 99%

Photovoltaic Performance of ZnO Nanosheets Solar Cell Sensitized with Beta-Substituted Porphyrin

Mahesh

2011

Journal of Nanomaterials

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“…Recently, many theoretical and experimental studies concerning other crystalline planes such as (110)-and (100)-oriented ZnO films have also been performed by more and more researchers. It is found that different crystalline orientations possess different electronic [16], optical [17] and acoustic [18] properties. Anisotropic acoustic wave properties have brought inspiration to the fabrication of film bulk acoustic wave resonator devices [18].…”

Section: Introductionmentioning

confidence: 99%

Effective electron collection in highly (110)-oriented ZnO porous nanosheet framework photoanode

Wang¹,

Tian²,

Yu³

et al. 2010

Nanotechnology

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A highly (110)-oriented ZnO porous nanosheet framework is designed as the photoanode in photoelectrochemical systems, by virtue of its anisotropic electronic properties. It can be facilely prepared in large scale via a hydrothermal method. X-ray diffraction (XRD) analyses show that the orientation index of the (110) diffraction plane is 3.54, indicating the films possess (110) preferred orientation. Field-emission scanning electron microscope (FE-SEM) images exhibit that most of the nanosheets stand nearly perpendicularly on the substrate. The {002} lattice planes work just like conducting wires and induce the electrons to transport to the substrate. Chronoamperometry measurement demonstrates an effective electron collection. When the nanostructured photoanode is introduced to dye-sensitized solar cells, a conversion efficiency of 3.7% is obtained. The photoanode also has potential application in the other photoelectrochemical systems, such as photocatalytical splitting of water.

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“…The diffraction peak around 34.4° corresponding to ZnO (0002) appears. The c-plane growth of ZnO thin films with a hexagonal wurtzite structure due to its lowest surface free energy has been well known [11].…”

Section: Resultsmentioning

confidence: 99%