The role of ZnO-coating-layer thickness on the recombination in CdS quantum-dot-sensitized solar cells

Choi, Hoon; Kim, Jongmin; Nahm, Changwoo; Kim, Chohui; Nam, Seunghoon; Kang, Joonhyeon; Lee, Byungho; Hwang, Taehyun; Kang, Seung‐Kyun; Choi, Dong Joo; Kim, Young‐Ho; Park, Byungwoo

doi:10.1016/j.nanoen.2013.05.007

Cited by 27 publications

(19 citation statements)

References 40 publications

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“…Inorganic semiconductors have been considered as ideal next‐generation sensitizers to overcome the limited DSSCs efficiency. By engineering quantum‐dot size, high absorption coefficient, high carrier mobilities and multiple carrier generation can together play a role for exceeding the Schottkye‐Queisser limit . Surface modification of TiO 2 with FeS 2 quantum dots for photoelectrochemical cell yielded maximum incident photon‐to‐photocurrent efficiency (IPCE) about 23% at 400 nm excitation determined from the equation :

true I P C E (() %) = 100 . \frac{1240 I_{S C}}{I_{i n c} λ}

…”

Section: Recent Trends: Pyrite Photovoltaicsmentioning

confidence: 99%

Nanocrystalline Pyrite for Photovoltaic Applications

et al. 2018

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Transition metal sulfides (TMSs) are of special interest in energy conversion and storage devices. Amongst all sulfides, fool's gold or iron pyrite (FeS 2 ) is potentially an attractive candidate for photovoltaic applications. Iron pyrite has risen to prominence due to its distinct properties and abundance in nature to meet the large scale needs. It is considered as environmentally benign solar absorber material with high absorption coefficient, α > 6 x10 5 cm À 1 for λ � 700 nm and suitable energy bandgap (E g = 0.95 eV). Numerous physical and chemical methods have been employed to deposit nanocrystalline pyrite thin films directly from source materials or indirectly by sulfuration. This review gives an overview of pyrite as a low cost photovoltaic absorber material for contemporary solar cell structures. In addition, practical approaches like the rational design of nanocomposites, band gap engineering and nanostructure synthesis of pyrite for improving its properties particularly photovoltaic properties are also deliberated. Moreover, limitations, challenges, remedies and prospects of pyrite as potential photovoltaic material are also reviewed to further advance the development of pyrite-based solar cell configurations.[a] Dr.at a low precursor concentration, pyrite nanocubes (125-250 nm in 20-180 min) were obtained due to low nuclei concentration and slow growth (diffusion limited) in quasiequilibrium. The anisotropic structures nanodendrites were 2 3 4 5 6 7 8

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true I P C E (() %) = 100 . \frac{1240 I_{S C}}{I_{i n c} λ}

…”

Section: Recent Trends: Pyrite Photovoltaicsmentioning

confidence: 99%

Nanocrystalline Pyrite for Photovoltaic Applications

et al. 2018

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“…The CdS quantum dots were coated on the branched ZnO nanowires by a successive ionic-layer adsorption and reaction (SILAR) [21] with 14-repeated cycles. Polysulfide electrolyte was prepared by dissolving 0.5 M Na 2 S, 1 M S, and 0.02 M KCl in methanol/water solutions (7/3 volumetric ratio) [22]. For the counter electrode, Ti was deposited on the pre-drilled FTO substrates as adhesion layer, and Cu was deposited by rf magnetron sputtering.…”

Section: Cell Fabricationmentioning

confidence: 99%

Facile Conversion Synthesis of Densely-Formed Branched ZnO-Nanowire Arrays for Quantum-Dot-Sensitized Solar Cells

Lee

Kang

Hwang

et al. 2015

Electrochimica Acta

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“…The organometallic CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite solar cells have received an enormous attention as next generation photovoltaics due to the potential strength of high power conversion efficiencies (PCEs) and low fabrication cost. [1][2][3][4][5][6][7][8][9][10][11][12][13] The perovskite semiconductor satisfies appropriate and direct bandgap, small exciton binding energy, and balanced ambipolar charge transport properties. [14][15][16][17][18] Even though the PCE of perovskite solar cell has reached 22.10%, it still has a potential to enhance the performance up to the theoretical limit of 31.40%.…”

Section: Introductionmentioning

confidence: 99%

“…33 On the other hand, the deposition is extensively utilized in industry owing to the fast deposition rate and compactness of the film and was also introduced with solar cell fabrication. 2,6,10,34,35 Even though the sputtering deposition can construct a compact layer, TiO 2 by sputtering yields some porous structure that allows the carrier recombination, and thereby, post-treatment or further improvement is still required. 35 Herein, we demonstrate the double-step deposition method, through a combination of sputter and solution to construct a vastly compact blocking layer.…”

Section: Introductionmentioning

confidence: 99%

Synergetic effect of double-step blocking layer for the perovskite solar cell

Kim

Hwang

Lee

et al. 2017

Journal of Applied Physics

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In an organometallic CH 3 NH 3 PbI 3 (MAPbI 3) perovskite solar cell, we have demonstrated a vastly compact TiO 2 layer synthesized by double-step deposition, through a combination of sputter and solution deposition to minimize the electron-hole recombination and boost the power conversion efficiency. As a result, the double-step strategy allowed outstanding transmittance of blocking layer. Additionally, crystallinity and morphology of the perovskite film were significantly modified, provoking enhanced photon absorption and solar cell performance with the reduced recombination rate. Thereby, this straightforward double-step strategy for the blocking layer exhibited 12.31% conversion efficiency through morphological improvements of each layer.

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The role of ZnO-coating-layer thickness on the recombination in CdS quantum-dot-sensitized solar cells

Cited by 27 publications

References 40 publications

Nanocrystalline Pyrite for Photovoltaic Applications

Nanocrystalline Pyrite for Photovoltaic Applications

Facile Conversion Synthesis of Densely-Formed Branched ZnO-Nanowire Arrays for Quantum-Dot-Sensitized Solar Cells

Synergetic effect of double-step blocking layer for the perovskite solar cell

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