Enhancing the efficiency of CdS quantum dot-sensitized solar cells via electrolyte engineering

Liao, Yulong; Zhang, Jin; Liu, Weiguo; Que, Wenxiu; Yin, Xingtian; Zhang, Dainan; Tang, Longhuang; He, Weidong; Zhong, Zhiyong; Zhang, Huaiwu

doi:10.1016/j.nanoen.2014.09.034

Cited by 32 publications

(13 citation statements)

References 33 publications

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“…Recently, on account of the exceptional properties including a relatively narrow band gap, size-dependent electronic, and excellent optical properties, cadmium sulfide (CdS) nanoscaled materials especially quantum dots (QDs) are extensively used in various fields. [1][2][3][4][5][6][7][8][9][10] Compared with UV-light-responsive photocatalysts, e.g. TiO 2 , visible-light-responsive photocatalysts can directly use a larger part of the solar spectrum, offering a desirable way to solve environmental issues, such as CdS, Ag 3 PO 4 , and boron carbides.…”

Section: Introductionmentioning

confidence: 99%

Cadmium sulfide quantum dots stabilized by aromatic amino acids for visible light-induced photocatalytic degradation of organic dyes

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Cadmium sulfide quantum dots stabilized by aromatic amino acids for visible light-induced photocatalytic degradation of organic dyes

et al. 2015

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“…Still, there are some disadvantages of the polysulfide electrolyte; like, the VOC of the resultant QDSSCs is generally low because polysulfide electrode has the relatively high redox potential [112]. To optimize the polysulfide electrolyte, many works have been reported like controlling the concentration of the redox mediator [113], introducing additives e.g., SiO2 [114], poly (vinyl pyrrolidone) (PVP) [115], and guanidine thiocyanate [116], and using a modifying solvent [117]. In order to improve the photovoltaic performance, especially the VOC of QDSSCs, alternative redox couples having relatively low redox potentials, such as Mn poly (pyrazolyl) borate and some organic redox couples have been applied in QDSSCs [118,119].…”

Section: Electrolytementioning

confidence: 99%

Quantum Dot-sensitized Solar Cells: A Review

Bhambhani

2018

Bulletin EEI

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Quantum dot-sensitized solar cell (QDSSC) has an analogous structure and working principle to the dye sensitizer solar cell (DSSC). It has drawn great attention due to its unique features, like multiple exciton generation (MEG), simple fabrication and low cost. The power conversion efficiency (PCE) of QDSSC is lower than that of DSSC. To increase the PCE of QDSSC, it is required to develop new types of working electrodes, sensitizers, counter electrodes and electrolytes. This review highlights recent developments in QDSSCs and their key components, including the photoanode, sensitizer, electrolyte and counter electrode.

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“…QDs represents a more efficient solution with respect of dye sensitizers because of better stability and chemical compatibility with ZnO, tunable properties and dimensions by ease control of synthesis parameter and higher optical absorption. A great variety of semiconducting QDs like CdS, CdSe, CdTe, PbS, PbSe, CuInS 2 , Bi 2 S 3 , In 2 S 3 , and carbon QDs has been implemented in ZnO based photovoltaic cell to work in visible range and cover a larger adsorption spectrum. Functionalization of ZnO nanostructures with QDs can be classified in two groups depending on the particles growth approach.…”

Section: Surface‐engineering Of Zno Nanostructures With Nanoparticlesmentioning

confidence: 99%

“…These layers are then used as precursor for a following ion exchange reaction to obtain different chalcogenide semiconductors in the form of continuous and uniform QDs layers, as reported in the scheme of Figure for the formation of ZnO/ZnS/CdS/CuInS 2 core‐shell nanowire arrays and related compound . Other common techniques include Successive Ionic Layer Adsorption and Reaction (SILAR), with the formation of QDs upon successive immersion of ZnO nanostructures in precursor solutions and alternate adsorption of cations and anions, and Electrochemical Deposition, in which size, morphology and deposition rate of QDs are controlled by electrical current, time and electrolyte composition. Alternatively, Ultrasonic Spray Pyrolysis (USP) was successfully implemented by Zhu et al to deposit ZnO photoanode in form of micrometer nanocrystallite aggregates and then sensitized with CdS QDs …”

Section: Surface‐engineering Of Zno Nanostructures With Nanoparticlesmentioning

confidence: 99%

Surface Engineering of Nanostructured ZnO Surfaces

Laurenti

Stassi

Canavese

et al. 2016

Adv Materials Inter

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are oriented in one direction and their assembly and stacking produces the wurtzite hexagonal symmetry. The noncentrosymmetric and anisotropic crystalline structure of wurtzite-like ZnO generates very interesting properties such as piezo-and pyro-electricity: the application of an external stimulus, like mechanical stress or temperature, deforms the tetrahedron structure. This deformation results in a separation between the positive and negative centers of charge, inducing the formation of a dipole moment. [7,8] The polar surface and anisotropic structure of ZnO can be usefully exploited to form different kinds of micro and nanostructures from 0D to 3D, [5] including, but not limited to nanowires, [9][10][11][12] nanotubes, [13,14] nanobelts, [15][16][17][18][19] nanorings, [20] flower-like morphologies, [21][22][23][24][25] multipods, [26,27] tetrapods, [28][29][30] sponge-like structures [31][32][33][34] and so on [29,[35][36][37][38][39] (Figure 1). Therefore, several research efforts have been invested in studying various preparation procedures for ZnO micro and nano-materials. Wet chemical approaches, like sol-gel, hydrothermal growths, electrodeposition and template-assisted routes, [40,41] as well as vapor-phase methods, for example chemical vapour deposition (CVD), physical vapour deposition (PVD) including sputtering and evaporation approaches, [42][43][44] and epitaxial growth methods [45] are among the most used ones. The great advantages of the wet chemical approaches are the high synthesis versatility, low temperature employed and low costs. [9] From the other side, dry methods take advantage of the high quality and excellent control over the level of crystallinity of the synthesized ZnO structures, as well as the absence of contamination and high purity of the final material. [46] The combination of different properties with the ease and high versatile synthesis of ZnO material in different micro and nanostructures offers a huge possibility of potential applications.For example, ZnO is already used as an efficient catalyst in the selective oxidation of involving oxygenates (i.e., alcohols, aldehydes, and carboxylic acids) and in methanol synthesis catalysts. It is also largely applied as protective, anti-corrosion layer in galvanized steel products, [49][50][51] as well as in paints and sunscreens as an UV absorber. Its biocompatibility makes this material suitable, in the form of microparticles, for paste formulations in cosmetic applications.The combination of the piezoelectric with the semiconducting properties of ZnO is found to result into new exciting physical properties, [52][53][54] and it has recently opened the research field to energy harvesting application. ZnO nanomaterials can be thus used as nanogenerators, able to convert the mechanical deformation from the surrounding environment into electrical Zinc Oxide (ZnO) nanostructures represent promising substrate materials for numerous applications, ranging from new generation solar cells, to bio-and chemical sensors. This interest is due ...

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Enhancing the efficiency of CdS quantum dot-sensitized solar cells via electrolyte engineering

Cited by 32 publications

References 33 publications

Cadmium sulfide quantum dots stabilized by aromatic amino acids for visible light-induced photocatalytic degradation of organic dyes

Cadmium sulfide quantum dots stabilized by aromatic amino acids for visible light-induced photocatalytic degradation of organic dyes

Quantum Dot-sensitized Solar Cells: A Review

Surface Engineering of Nanostructured ZnO Surfaces

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