Dye-sensitized solar cells based on low-cost nanoscale SnO2@RGO composite counter electrode

Du, Feng; Yang, Bo; Zuo, Xueqin; Li, Guang

doi:10.1016/j.matlet.2015.06.012

Cited by 28 publications

(13 citation statements)

References 20 publications

(19 reference statements)

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“…Therefore, the existence of SnO 2 in rGO results in more defects, as well as in the destruction of sp 2 domains. From another point of view, this change also suggests an interesting connection between the SnO 2 nanoparticles (NPs) and rGO [25]. …”

Section: Resultsmentioning

confidence: 99%

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Karthick

Lee

Kwon

et al. 2016

Sensors

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The present study focuses the development and the evaluation of humidity sensors based on reduced graphene oxide—tin oxide (rGO-SnO2) nanocomposites, synthesized by a simple redox reaction between GO and SnCl2. The physico-chemical characteristics of the nanocomposites were analyzed by XRD, TEM, FTIR, and Raman spectroscopy. The formation of SnO2 crystal phase was observed through XRD. The SnO2 crystal phase anchoring to the graphene sheet was confirmed through TEM images. For the preparation of the sensors, tantalum substrates were coated with the sensing material. The sensitivity of the fabricated sensor was studied by varying the relative humidity (RH) from 11% to 95% over a period of 30 days. The dependence of the impedance and of the capacitance with RH of the sensor was measured with varying frequency ranging from 1 kHz to 100 Hz. The long-term stability of the sensor was measured at 95% RH over a period of 30 days. The results proved that rGO-SnO2 nanocomposites are an ideal conducting material for humidity sensors due to their high sensitivity, rapid response and recovery times, as well as their good long-term stability.

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Section: Resultsmentioning

confidence: 99%

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Karthick

Lee

Kwon

et al. 2016

Sensors

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“…Cyclic voltammetry (CV) has been widely used to investigate the catalytic activity of catalysts . Figure a shows the CV curves of cPPy, hPPy, and Pt electrodes at a scan rate of 20 mV s −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Cyclic voltammetry (CV) has been widely used to investigate the catalytic activity of catalysts. [46,13,16,47] Figure 2a shows the CV curveso fc PPy,h PPy,a nd Pt electrodes at as can rate of 20 mV s À1 .T wo pairs of redox peaks are observed for Pt electrodes, representing the following reactions [Eqs. (1) and (2)]:…”

Section: Effect Of Specific Surface Area On the Ppy Cesmentioning

confidence: 99%

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Electrochemically Prepared Poly(3,4‐ethylenedioxy‐ thiophene)/Polypyrrole Films with Hollow Micro‐/Nanohorn Arrays as High‐Efficiency Counter Electrodes for Dye‐Sensitized Solar Cells

Bai

Wang

et al. 2016

ChemElectroChem

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A two‐step approach is employed for quick and controllable electropolymerization of poly(3,4‐ethylenedioxythiophene) (PEDOT)/polypyrrole (PPy) hollow micro‐/nanohorns on fluorinated tin oxide (FTO) glass substrates as counter electrodes (CEs) for Pt‐free dye‐sensitized solar cells (DSCs). PPy films with hollow micro‐/nanohorn arrays are grown on FTO glasses by a modified pulse potentiostatic method in the first step. Then PEDOT is potentiostatically polymerized onto them as the CEs. Owing to the relatively high catalytic activity of PEDOT and the high specific surface area of hollow micro‐/nanohorn PPy (hPPy), the compound film shows electrocatalytic activity for I3− reduction similar to that of Pt. Therefore, DSCs assembled with this CE exhibit comparable power conversion efficiency (7.08 %) to DSCs with Pt CEs (6.88 %). The PEDOT/PPy film with hollow micro‐/nanohorn arrays can be considered to be a promising alternative CE material for Pt‐free DSCs.

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“…As the Pt material cost is high, research scholars have studied how to reduce the cost and increase the efficiency in succession. In recent years, many studies have been reported on the material characteristics of the CE . Carbon material has been the most popular choice among the research materials.…”

Section: Introductionmentioning

confidence: 99%

A study of novel macrocyclic copper complex/graphene‐based composite materials for counter electrodes of dye‐sensitized solar cells

Wang

et al. 2019

J Chinese Chemical Soc

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In this study, a newly synthesized macrocyclic copper complex, [Cu(C10H20N8)(C4H8N4)](BF4)2, was used for a reaction with graphene oxide. Macrocyclic copper complex/graphene‐based composite materials were prepared and applied to the counter electrodes (CEs) of dye‐sensitized solar cells (DSSCs). As the level of the macrocyclic copper complex increased, the catalytic sites on the surface of the CE increased. The results showed that the device efficiency of the composite GO/Cu (1:10) CE was 7.61%, which was better than that of the Platinum (Pt) CE (7.04%). The device efficiency of the DSSC was enhanced effectively because the electrocatalytic activity of the CE was enhanced, and the interface impedance of the device was reduced. Therefore, the macrocyclic copper complex/graphene‐based composite materials may have the potential to replace traditional Pt to increase efficiency and reduce the fabrication cost of DSSCs.

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Dye-sensitized solar cells based on low-cost nanoscale SnO2@RGO composite counter electrode

Cited by 28 publications

References 20 publications

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Standardization, Calibration, and Evaluation of Tantalum-Nano rGO-SnO2 Composite as a Possible Candidate Material in Humidity Sensors

Electrochemically Prepared Poly(3,4‐ethylenedioxy‐ thiophene)/Polypyrrole Films with Hollow Micro‐/Nanohorn Arrays as High‐Efficiency Counter Electrodes for Dye‐Sensitized Solar Cells

A study of novel macrocyclic copper complex/graphene‐based composite materials for counter electrodes of dye‐sensitized solar cells

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