Structural and optical properties of tripod-like ZnO thin film and its application in dye-sensitized solar cell

Bahadur, Lal; Kushwaha, S. S.

doi:10.1007/s10008-013-2053-z

Cited by 12 publications

(2 citation statements)

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“…Figure The low efficiency and J SC in manufactured DSSC with flower-shaped ZnO nanostructures based photoanode are attributed to its nonuniform distribution of flowers and low specific surface area (Surface area = 8.351 m 2 /g), resulting in moderate amount of dye absorption via the flower-shaped ZnO nanostructure based photoanode. The yielded photovoltaic parameters of manufactured DSSC are better than those of similarly DSSCs fabricated with ZnO-based photoanode [47][48][49][50][51][52]. Moreover, the low J SC of manufactured DSSC was affiliated to the low surface area and low efficiency of light harvesting.…”

Section: Ipce (%) = ηLh(λ) ηInj(λ) ηCol(λ)mentioning

confidence: 95%

“…These factors might have restricted to achieve high performance and photocurrent density in DSSC using flower-shaped ZnO nanostructures based photoanode. Table 1 exhibits the photovoltaic performance of variety of fabricated DSSCs based on the utilization of different ZnO nanostructures as photoanodes [47][48][49][50][51][52][53][54][55][56][57][58][59]. Electrochemical impedance spectroscopy (EIS) for DSSCs with flower-shaped ZnO nanostructures has been performed to explain the charge transport and recombination mechanisms.…”

Section: Ipce (%) = ηLh(λ) ηInj(λ) ηCol(λ)mentioning

confidence: 99%

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Direct Growth of Flower-Shaped ZnO Nanostructures on FTO Substrate for Dye-Sensitized Solar Cells

et al. 2019

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The proposed work reports that ZnO nanoflowers were grown on fluorine-doped tin oxide (FTO) substrates via a solution process at low temperature. The high purity and well-crystalline behavior of ZnO nanoflowers were established by X-ray diffraction. The morphological characteristics of ZnO nanoflowers were clearly revealed that the grown flower structures were in high density with 3D floral structure comprising of small rods assembled as petals. Using UV absorption and Raman spectroscopy, the optical and structural properties of the ZnO nanoflowers were studied. The photoelectrochemical properties of the ZnO nanoflowers were studied by utilizing as a photoanode for the manufacture of dye-sensitized solar cells (DSSCs). The fabricated DSSC with ZnO nanoflowers photoanode attained reasonable overall conversion efficiency of~1.40% and a short-circuit current density (J SC ) of~4.22 mA cm −2 with an open circuit voltage (V OC ) of 0.615 V and a fill factor (FF) of~0.54. ZnO nanostructures have given rise to possible utilization as an inexpensive and efficient photoanode materials for DSSCs.Crystals 2019, 9, 405 2 of 13 of recombination rate and efficient electron transport in the photoanode [15]. Most the reported DSSCs based on ZnO photoanodes are inferior to DSSCs based on the TiO 2 photoanode [16][17][18], which normally can be attributed to ZnO dissolution to Zn 2+ via the adsorbed acidic dye such as N3, N719, and black dye, resulting in the aggregate formation of Zn 2+ and dye molecules [19]. These aggregates formation of Zn 2+ /dye complexes are further blocked the injected electrons from the photoexcited dye molecules to the ZnO, which results in decrease in proper electron injection. It is realized that some extent of research on the improvement in performance of ZnO-based DSSC are needed to outperform the aggregates formation of Zn 2+ /dye complexes [19].ZnO is highly scrutinized n-type semiconducting oxide owing to its an unique wide band gap of 3.37 eV and considerable large exciton binding energy of~60 meV at ambient condition [20,21]. The unique properties of ZnO materials have attracted attention in the area of electrochemical and photoelectrochemical devices because they have special ability to grow a variety of different nanostructures [22][23][24][25][26][27][28][29]. Apart from thermal growth of ZnO, ZnO synthesis at low temperature solution processes has recently been popularized due to ease of processibility, high aspect growth ratio, low-cost, and high yield [30]. In past few years, researches are experimented to elevate the conversion efficiency of ZnO-based DSSCs by adopting different structural and morphological aspects like 1D, 2D, and 3D branched networks and mixed morphologies for preparing ZnO photoanodes [31][32][33]. Several works on the utilization of 1D and 2D ZnO-based photoanodes have already been reported, but the conversion efficiencies of DSSCs are not competent to TiO 2 based DSSCs [29][30][31][32][33].Herein, we report the low-temperature hydrothermal synthesis, characterization...

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