Effect of Al3+ on the growth of ZnO nanograss film and its application in dye-sensitized solar cells

Zhu, Shibu; Tian, Xin; Shan, Liming; Ding, Zhao-Ying; Kan, Zhengxing; Xu, Xiaoling; Zhou, Zuowan; Wang, Li

doi:10.1016/j.ceramint.2013.05.085

Cited by 18 publications

(5 citation statements)

References 33 publications

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“…Reduction in electron transport resistance was observed with the increase of the diameter of ZnO nanorods arrays by Al doping. Almost similar efficiency (η = 0.3%) was also reported by Zhu et al by doping ZnO nanorod arrays with Al [134]. Reduced electron recombination and enhanced electron lifetime are two main factors that led to enhancement of DSSC performance, which were confirmed by open-circuit voltage decay and EIS characterizations.…”

Section: Effect Of Interfacial Modificationsupporting

confidence: 84%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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Summary Dye‐sensitized solar cell (DSSC) attracts immense interest in the last few decades due to its various attractive features such as low production cost, ease of fabrication and relatively high conversion efficiency, which make it a strong competitor to the conventional silicon‐based solar cell. In DSSC, photo‐anode performs two important functions, viz. governs the collection and transportation of photo‐excited electrons from dye to external circuit as well as acts as a scaffold layer for dye adsorption. The photo‐anode usually consists of wide band gap semiconducting metal oxides such as titanium dioxide (TiO2) and zinc oxide (ZnO) deposited on the transparent conducting oxide substrates. The morphology and composition of the semiconductor oxides have significant impact on the DSSC photovoltaic performance. Therefore, enormous research efforts have been undertaken to investigate the influences of photo‐anode modifications on DSSC performance. The modifications can be classified into three categories, namely interfacial modification through the introduction of blocking and scattering layer, doping with non‐metallic anions and metallic cations and replacing the conventional mesoporous semiconducting metal oxide films with one‐dimensional or two‐dimensional nanostructures. In the present review, the previously mentioned modifications on photo‐anode are summarized based on the recent findings, with particular emphasis given to published works for the past 5 years. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Effect Of Interfacial Modificationsupporting

confidence: 84%

Recent advances in photo-anode for dye-sensitized solar cells: a review

2017

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“…Therefore, the application of ZnO nanowires in DSCs is of great interest. However, reported efficiencies of ZnO nanowire solar cells are very low at present [5,[11][12][13][14]. One possible reason for the low efficiency may be that the surface area of the nanowire photoanode is not large enough.…”

Section: Introductionmentioning

confidence: 84%

Boosting ZnO nanowire dye-sensitized solar cell efficiency by coating a porous ZnO layer on the nanowires

Zhu

Deng

et al. 2014

J Mater Sci: Mater Electron

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Novel ZnO core/shell nanostructures were constructed by depositing a porous ZnO layer directly on the surfaces of pre-fabricated ZnO nanowires through a facile chemical method. The morphology and structure of the obtained products have been investigated by fieldemission scanning electron microscopy, high-resolution transmission electron microscopy and X-ray diffraction analysis. In these unique nanostructures, the porous overlayer exhibits a large surface area for sufficient dye loading to enhance light harvesting and the ZnO nanowire cores provide direct conduction pathways for the photogenerated electron transport to diminish the chance of electron recombination. The obtained ZnO nanostructures were used as photoanode material in dye-sensitized solar cell which showed an increase in performance of 141 % compared with an equivalent solar cell employing ZnO nanowire arrays as photoanode. This result was achieved mainly due to an increase in photogenerated current density directly resulting from improved light harvesting of the porous layer.

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“…[187,188] Aldoping of ZnO led to improved photocurrents caused by an ameliorated electron conduction, and an increased amount of anchored dye, but either a decreased U oc because of decreased E g or an increased U oc as a consequence of blocked recombination. [282][283][284] Doping of ZnO by Ga led to increased charge carrier concentration in the material and increased (albeit low) cell efficiencies as a consequence of widely preserved U oc and increased photocurrents resulting from a higher roughness of the films. [189] Similarly, doping by Sn led to increased efficiencies as a consequence of changes in particle and film morphology.…”

Section: Role Of Doped Moss In Dye-sensitized and Perovskite Solar Cellsmentioning

confidence: 99%

Opportunities from Doping of Non‐Critical Metal Oxides in Last Generation Light‐Conversion Devices

Gatti

Lamberti

Mazzaro

et al. 2021

Advanced Energy Materials

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The need to develop sustainable energy solutions is an urgent requirement for society, with the additional requirement to limit dependence on critical raw materials, within a virtuous circular economy model. In this framework, it is essential to identify new avenues for light‐conversion into clean energy and fuels exploiting largely available materials and green production methods. Metal oxide semiconductors (MOSs) emerge among other species for their remarkable environmental stability, chemical tunability, and optoelectronic properties. MOSs are often key constituents in next generation energy devices, mainly in the role of charge selective layers. Their use as light harvesters is hitherto rather limited, but progressively emerging. One of the key strategies to boost their properties involves doping, that can improve charge mobility, light absorption and tune band structures to maximize charge separation at heterojunctions. In this review, effective methods to dope MOSs and to exploit the derived benefits in relation to performance enhancement in different types of devices are identified and critically compared. The work is focused specifically on the best opportunities coming from the use of non‐critical raw materials, so as to contribute in defining an economically feasible roadmap for light conversion technologies based on these highly stable and widely available compounds.

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Effect of Al3+ on the growth of ZnO nanograss film and its application in dye-sensitized solar cells

Cited by 18 publications

References 33 publications

Recent advances in photo-anode for dye-sensitized solar cells: a review

Recent advances in photo-anode for dye-sensitized solar cells: a review

Boosting ZnO nanowire dye-sensitized solar cell efficiency by coating a porous ZnO layer on the nanowires

Opportunities from Doping of Non‐Critical Metal Oxides in Last Generation Light‐Conversion Devices

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