Increase of power conversion efficiency in dye-sensitized solar cells through ferroelectric substrate induced charge transport enhancement

Liu, Xiaoyan; Zhang, Zuo‐Feng; Li, Jiangyu; Valanoor, Nagarajan; Tang, Xiao; Cao, Guozhong

doi:10.1038/s41598-018-35764-y

Cited by 25 publications

(13 citation statements)

References 42 publications

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“…In the EIS measurement done under the dark condition and with an applied bias voltage, electrons from FTO are injected into the conduction band of ZnO and then transported through the ZnO network. Some of the injected electrons recombine with the I 3 − ion present in the electrolyte giving rise to the recombination phenomenon (Liu et al 2018). Figure 9(a)…”

Section: Electrochemical Impedance Spectroscopy Studymentioning

confidence: 99%

Effect of Chenodeoxycholic Acid as Dye Co-Adsorbent and ZnO Blocking Layer in Improving The Performance of Rose Bengal Dye Based Dye Sensitized Solar Cells

Biswas¹,

Chatterjee²

2021

Preprint

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Effective suppression of dye aggregation on the photoanode surface of dye sensitized solar cell plays a key role in improving the solar cell efficiency. Chenodeoxycholic acid (CDCA) is a very popular anti dye aggregation material used in Dye sensitized solar cells. However, the selection of an improper concentration of CDCA may lead to decreased solar cell efficiency by lowering the open circuit voltage and short circuit current as a consequence of reduced dye loading. The influence of chenodeoxycholic acid (CDCA) as a dye co-adsorbent on the performance of DSSCs fabricated using Rose Bengal dye was studied in this paper. The concentration of the CDCA solution was varied to identify the optimum value for the best device performance. Aside from this, the effect of a very thin and compact ZnO blocking layer was also investigated to reduce the recombination. With photovoltaic parameters such as short circuit current density (Jsc) = 1.98 mA/cm2, open circuit voltage (Voc) = 0.58 V, and fill factor (FF) = 0.43, the traditional cell displayed an overall conversion efficiency of 0.50 %, while the power conversion efficiency was found to be increased to 0.97 % ( Jsc = 2.80 mA/cm2, Voc= 0.64, FF = 0.58 ) when CDCA was added at optimised concentration of 8 mM. Reduced dye aggregation and increased electron injection in the presence of CDCA may be accounted for the DSSC's remarkable improvement in efficiency. Moreover, the combined effect of 8 mM CDCA and the compact ZnO blocking layer dramatically enhanced the efficiency further to 1.23 % (Jsc = 3.09 mA/cm2, Voc= 0.66, FF = 60 ). Electrochemical impedance spectroscopic (EIS) analysis revealed that the addition of CDCA as a co-adsorbent in the dye solution and addition of ZnO blocking layer resulted in significantly improved electron lifetime and reduced electron recombination yielding improved Jsc, Voc and η.

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Section: Electrochemical Impedance Spectroscopy Studymentioning

confidence: 99%

Effect of Chenodeoxycholic Acid as Dye Co-Adsorbent and ZnO Blocking Layer in Improving The Performance of Rose Bengal Dye Based Dye Sensitized Solar Cells

Biswas¹,

Chatterjee²

2021

Preprint

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“…Due to the unique combination of physical and chemical properties, ferroelectric materials are widely used in the production of integrated optical devices, waveguide structures, phase modulators, piezoelectric transducers, and surface acoustic waves devices [12][13][14][15]. Besides, ferroelectric materials are promising for photoelectric converters due to their charging properties [16]. However, in most cases, piezoelectric films are based on multicomponent oxides (BaTiO 3 , SrTiO 3 , LiNbO 3 ), and their properties are determined by the stoichiometric composition and structure, which depend on the growth method and fabrication parameters.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Pressure Influence on Properties of Nanocrystalline LiNbO3 Films Grown by Laser Ablation

et al. 2020

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Energy conversion devices draw much attention due to their effective usage of energy and resulting decrease in CO2 emissions, which slows down the global warming processes. Fabrication of energy conversion devices based on ferroelectric and piezoelectric lead-free films is complicated due to the difficulties associated with insufficient elaboration of growth methods. Most ferroelectric and piezoelectric materials (LiNbO3, BaTiO3, etc.) are multi-component oxides, which significantly complicates their integration with micro- and nanoelectronic technology. This paper reports the effect of the oxygen pressure on the properties of nanocrystalline lithium niobate (LiNbO3) films grown by pulsed laser deposition on SiO2/Si structures. We theoretically investigated the mechanisms of LiNbO3 dissociation at various oxygen pressures. The results of x-ray photoelectron spectroscopy study have shown that conditions for the formation of LiNbO3 films are created only at an oxygen pressure of 1 × 10−2 Torr. At low residual pressure (1 × 10−5 Torr), a lack of oxygen in the formed films leads to the formation of niobium oxide (Nb2O5) clusters. The presented theoretical and experimental results provide an enhanced understanding of the nanocrystalline LiNbO3 films growth with target parameters using pulsed laser deposition for the implementation of piezoelectric and photoelectric energy converters.

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“…Several studies have demonstrated the effectiveness of implementing ferroelectric polarization to improve the performance of semiconductor devices through a polarization-induced internal field. For instance, ferroelectric LiNbO 3 and BaTiO 3 were employed to facilitate charge separation and transport in dye-sensitized solar cells to increase cell efficiency [15,16]. Recently, applications of ferroelectric polarization were also explored to enhance photocatalytic performance [17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric Polarization-Enhanced Photocatalysis in BaTiO3-TiO2 Core-Shell Heterostructures

Liu

Fan

et al. 2019

Nanomaterials

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Suppressing charge recombination and improving carrier transport are key challenges for the enhancement of photocatalytic activity of heterostructured photocatalysts. Here, we report a ferroelectric polarization-enhanced photocatalysis on the basis of BaTiO3-TiO2 core-shell heterostructures synthesized via a hydrothermal process. With an optimal weight ratio of BaTiO3 to TiO2, the heterostructures exhibited the maximum photocatalytic performance of 1.8 times higher than pure TiO2 nanoparticles. The enhanced photocatalytic activity is attributed to the promotion of charge separation and transport based on the internal electric field originating from the spontaneous polarization of ferroelectric BaTiO3. High stability of polarization-enhanced photocatalysis is also confirmed from the BaTiO3-TiO2 core-shell heterostructures. This study provides evidence that ferroelectric polarization holds great promise for improving the performance of heterostructured photocatalysts.

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Increase of power conversion efficiency in dye-sensitized solar cells through ferroelectric substrate induced charge transport enhancement

Cited by 25 publications

References 42 publications

Effect of Chenodeoxycholic Acid as Dye Co-Adsorbent and ZnO Blocking Layer in Improving The Performance of Rose Bengal Dye Based Dye Sensitized Solar Cells

Effect of Chenodeoxycholic Acid as Dye Co-Adsorbent and ZnO Blocking Layer in Improving The Performance of Rose Bengal Dye Based Dye Sensitized Solar Cells

Oxygen Pressure Influence on Properties of Nanocrystalline LiNbO3 Films Grown by Laser Ablation

Ferroelectric Polarization-Enhanced Photocatalysis in BaTiO3-TiO2 Core-Shell Heterostructures

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