p-Type Dye-Sensitized NiO Solar Cells: A Study by Electrochemical Impedance Spectroscopy

Huang, Zhongjie; Natu, Gayatri; Ji, Zhu; Hasin, Panitat; Wu, Yiying

doi:10.1021/jp205306g

Cited by 109 publications

(133 citation statements)

References 59 publications

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“…Wu et al were among the first to apply EIS to p-type DSSCs and to interpret the obtained parameters. 15 The recombination resistance (R rec ) was probed at different applied voltages, showing a unique behavior compared to TiO 2 based DSSCs. This fundamental difference was attributed to recombination between the excited state of the reduced photosensitizer and the NiO semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

et al. 2016

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aWe introduce a novel and comprehensive approach for the evaluation and interpretation of electrochemical impedance spectroscopy (EIS) measurements in p-type DSSCs. In detail, we correlate both the device performance and EIS figures-of-merit of a series of devices in which, the calcination temperature, film thickness, and electrolyte concentration have been systematically modified. This new approach enables the separation of the different processes across the dye/semiconductor/electrolyte interface, namely the unfavorable charge recombination and the favorable electron injection/regeneration processes. In addition, studies on non-sensitized CuO and NiO electrodes provide insights into their affinity towards a reaction with the electrolyte -CuO is far less reactive towards the polyiodide species. Overall, this work underlines the superior features of CuO with respect to NiO for p-DSSCs and demonstrates a comprehensive optimization of the CuO-based DSSCs with respect to the device architecture by the aid of EIS analysis.

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Section: Introductionmentioning

confidence: 99%

Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

et al. 2016

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“…EIS measurements under dark conditions give insights into recombination processes between the electrode and the electrolyte. [27] Figure 3 documents that the recombination resistance (Rrec) increases with decreasing voltage. Within the voltage range, slightly lower resistances towards recombination with the I -/I3 -redox couple are noted for ZnPc2 devices.…”

mentioning

confidence: 96%

“…Applying different voltages to change between short-circuit current density and open-circuit voltage conditions assists in probing the aforementioned processes in p-type DSSCs. [27,28] As an illustration, the Nyquist plots under Voc and Jsc conditions are shown in Figure S6. Here, two semicircles, which relate to the resistance across the platinum/electrolyte interface in the high frequency region and the dye/electrode/electrolyte interface in the low frequency region are discernable.…”

mentioning

confidence: 99%

“…Here, two semicircles, which relate to the resistance across the platinum/electrolyte interface in the high frequency region and the dye/electrode/electrolyte interface in the low frequency region are discernable. [27] From the corresponding electrical circuit model, which is illustrated in Figure S7, the resistances and capacitances are derived - Figure 3 and Table S2. EIS measurements under dark conditions give insights into recombination processes between the electrode and the electrolyte.…”

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confidence: 99%

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Combining Electron‐Accepting Phthalocyanines and Nanorod‐like CuO Electrodes for p‐Type Dye‐Sensitized Solar Cells

et al. 2015

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Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in: El acceso a la versión del editor puede requerir la suscripción del recurso Access to the published version may require subscription COMMUNICATION Combining novel electron-accepting phthalocyanines and nanorod-like CuO electrodes for p-type dye-sensitized solar cellsOliver Langmar, [a] Carolina R. Ganivet, [b] Annkatrin Lennert, [a] Rubén D. Costa, [a] Gema de la Torre, [b] Tomás Torres, [b] and Dirk M. Guldi [a] Abstract: In the current work, a novel route for the synthesis of two electron-accepting phthalocyanines featuring linkers with different length as sensitizers for p-type dye-sensitized solar cells are reported. Importantly, our devices -based on novel nanorod-like CuO photocathodes -feature efficiencies of 0.191%, which are to date the highest values ever reported for CuO-based DSSCs.

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“…The modelling of J-V responses by Huang et al [213] examined the effects of resistive and recombinative losses. By recalculating the obtained J-V curve without series resistance, a slight improvement in JSC was seen, while the effects of eliminating photoinduced recombination were shown to have a much more substantial impact.…”

Section: Decreasing Recombination / Increasing the Fill Factormentioning

confidence: 99%

Developments in and prospects for photocathodic and tandem dye-sensitized solar cells

Nattestad¹,

Perera²,

Spiccia³

2016

Journal of Photochemistry and Photobiology C: Photochemistry Re

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Third generation photovoltaics are based on the concept of providing high conversion efficiencies with low device production costs. As such, second generation concepts, such as Dye-sensitized Solar Cells (DSCs), serve as a good starting point for the development of these new devices. Tandem DSC devices are one example of such a concept, and can be constructed using two photoactive electrodes (one photoanode and one photocathode) inside the one cavity, increasing the theoretical efficiency limit by around 50% as compared to the conventional design. As there has been substantial effort devoted to the development of ntype DSCs, the focus of researchers investigating tandem DSCs has been to create high performance p-type systems, which operate by an analogous, but inverted, mechanism to n-type DSCs.

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p-Type Dye-Sensitized NiO Solar Cells: A Study by Electrochemical Impedance Spectroscopy

Cited by 109 publications

References 59 publications

Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

Combining Electron‐Accepting Phthalocyanines and Nanorod‐like CuO Electrodes for p‐Type Dye‐Sensitized Solar Cells

Developments in and prospects for photocathodic and tandem dye-sensitized solar cells

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