Graphitic porous carbon derived from human hair as ‘green’ counter electrode in quantum dot sensitized solar cells

Sahasrabudhe, Atharva; Kapri, Sutanu; Bhattacharyya, Sayan

doi:10.1016/j.carbon.2016.06.015

Cited by 62 publications

(34 citation statements)

References 45 publications

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“…To record the TEM images, our as‐synthesized polymers were first solubilized in THF (0.5 mg/ml) and the resulting solution (10 μl) was then drop casted on the carbon coated 400 mesh Cu grid followed by vacuum drying overnight. Figure reveals the uniform arrangement of the lattice plane of CPVBM2 and CPVBM3 which approves their significant crystalline nature . The inter‐plane spacing values of the CPVBM2 and CPVBM3 were estimated from selected area electron diffraction (SAED) which were determined as 4.12 and 4.15 Å, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…Figure 8 reveals the uniform arrangement of the lattice plane of CPVBM2 and CPVBM3 which approves their significant crystalline nature. [51,52] The inter-plane spacing values of the CPVBM2 and CPVBM3 were estimated from selected area electron diffraction (SAED) which were determined as 4.12 and 4.15 Å, respectively. These values were found to be in line with the inter-plane spacing (4.10 Å) corresponding to (110) planes as determined from WAXS analysis for those copolymers.…”

Section: Crystalline Behavior Of Copolyperoxidesmentioning

confidence: 99%

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Composition‐dependent crystallization behavior of copolyperoxides from methyl methacrylate and 4‐vinylbenzyl stearate

Mete

Goswami

2020

Journal of Polymer Science

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To study the composition‐dependent crystallization behavior of copolyperoxides, herein a series of copolymers were prepared by varying the ratios of methyl methacrylate (MMA) and 4‐vinylbenzyl stearate (VBS) under 100 psi oxygen pressure using AIBN as an initiator at 50°C in toluene. Both 13C NMR and electron impact mass spectroscopy (EI‐MS) approved an alternative placement of either of the monomer and peroxy (–O–O–) links throughout the polymer chain. Thermal stability of the resulting copolyperoxides was investigated by thermogravimetric analysis (TGA) and the degradation fragments have been recognized from EI‐MS study. In addition, differential scanning calorimetry (DSC) displayed an endothermic peak as well as an exotherm associated with the melting of the side chain crystalline domains and degradation of –O–O– links in the polymer main chain, respectively. Furthermore, DSC thermograms unveiled a systematic decrease of the crystalline melting temperature (Tm) with the enhancement of MMA content in the copolymers. Small angle X‐ray scattering (SAXS) revealed the existence of lamellar morphology (depends on VBS content in the copolyperoxide) in the synthesized polyperoxide materials, further supported by atomic force microscopy (AFM) analysis showing a layered fibrillar assembly with multiple heights of the lamella. The significant crystalline nature of the polyperoxides was further evidenced from the appearance of lattice fringes in the transmission electron microscope (TEM) micrographs. The crystalline morphology with birefringent texture was further evidenced from the polarized optical microscopy (POM) study. Thus, the present study reported the effective variation of crystalline behavior in copolyperoxide materials with the incorporation of MMA units in the copolyperoxide chains.

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Section: Resultsmentioning

confidence: 97%

Section: Crystalline Behavior Of Copolyperoxidesmentioning

confidence: 99%

Composition‐dependent crystallization behavior of copolyperoxides from methyl methacrylate and 4‐vinylbenzyl stearate

Mete

Goswami

2020

Journal of Polymer Science

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“…So far, there are cheaper alternative materials that can rival with Pt in terms of electrocatalytic performance such as nitrides [3], sulfides [4], carbides [5], and carbon allotropes. Various types of carbons that can function well as CE catalysts include graphites, carbon nanotubes, graphenes, reduced graphene oxides, activated carbons, carbon blacks, and biomass-derived charcoals (biochars) [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…One of the procedures to produce a biochar catalyst for a DSSC application is to thermally carbonize biomass under reducing atmosphere at a high temperature of around 850°C [12,13]. Furthermore, to improve the as-pyrolized carbon's electrocatalytic performance, additional chemical processing steps in order to increase the carbon's surface area may be required.…”

Section: Introductionmentioning

confidence: 99%

“…Yet, there were only a few reports involving applications of carbonized human hair as an electrochemical electrode. These reports demonstrated the use of carbonized hair as a supercapacitor electrode [19,20] and as a CE of a quantum dot-sensitized solar cells (QDSSC) [13]. As for the QDSSC-related work, Sahasrabudhe et al fabricated their QDSSC CEs by mixing carbonized-hair powder with a PVDF binder and an NMP solvent.…”

Section: Introductionmentioning

confidence: 99%

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A Dye-Sensitized Solar Cell Using a Composite of PEDOT:PSS and Carbon Derived from Human Hair for a Counter Electrode

Moolsarn

Tangtrakarn

Pimsawat

et al. 2017

International Journal of Photoenergy

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Carbon derived from hair is interesting because it has good electrocatalytic activity due to the existence of innate heteroatom dopants especially nitrogen and sulfur. In this study, a carbon catalyst containing high nitrogen contents (9.47 at.%) was fabricated without using any harsh chemicals. Moreover, the carbonization temperature was only 700°C. Carbonized hair/ PEDOT:PSS composites (C x P) with varied carbon contents from x = 0.2 to 0.8 g were tested as a counter electrode (CE) for a dye-sensitized solar cell (DSSC). This type of DSSC CE has scarcely been investigated. A DSSC with a C 0.6 P CE provides the best efficiency (6.54 ± 0.11%) among all composite CEs because it has a high fill factor (FF) and a high short-circuit current density (J sc ). The efficiency of DSSC with C 0.6 P CE is lower than Pt's (7.29 ± 0.01%) since the Pt-based DSSC has higher FF and J sc values. However, C 0.6 P is still promising as a DSSC CE since it is more cost-effective than Pt.

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Counter Electrodes inDSSCsBased on Carbon Derived from Edible Sources

Kumar

Bhargava

2018

Counter Electrodes for Dye‐sensitized and Perovskite Solar Cells

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Graphitic porous carbon derived from human hair as ‘green’ counter electrode in quantum dot sensitized solar cells

Cited by 62 publications

References 45 publications

Composition‐dependent crystallization behavior of copolyperoxides from methyl methacrylate and 4‐vinylbenzyl stearate

Composition‐dependent crystallization behavior of copolyperoxides from methyl methacrylate and 4‐vinylbenzyl stearate

A Dye-Sensitized Solar Cell Using a Composite of PEDOT:PSS and Carbon Derived from Human Hair for a Counter Electrode

Counter Electrodes inDSSCsBased on Carbon Derived from Edible Sources

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