Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties

Keru, Godfrey; Ndungu, Patrick; Mola, Genene Tessema; Nyamori, Vincent O.

doi:10.3390/ma8052415

Cited by 17 publications

(7 citation statements)

References 36 publications

(51 reference statements)

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“…This showed that the increase in the P 3 HT concentration reinforces the effectiveness of P 3 HT wrapping towards the CNT side-wall by increasing the diameter of CNT [33]. It is also clear from images (3-a-d) that by adding impurity (silver nanoparticles) into the pre-prepared CNT/P 3 HT matrix, thicker tubular structures with rough surfaces and agglomerate-like mat structures were obtained, and this illustrates the wrapping of the polymer on the nanotubes to form a nanocomposite [34]. This suggests that the silver nanoparticles are acting as a bridge between the CNT and P 3 HT, creating a strong bond between the two materials that is strong enough to form thicker tubular structures.…”

Section: Field Emission Scanning Electron Microscopy (Fesem) Analysismentioning

confidence: 64%

Synthesis, Characterization and Functionalization of P3HT-CNT Nanocomposite Thin Films with Doped Ag2O

Abbas,

Koubaa,

Abdullah

2024

East Eur. J. Phys.

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This research focuses on the synthesis of carbon nanotube (CNT) and Poly(3-hexylthiophene) (P3HT) (pristine polymer) with Ag doped (CNT/ P3HT@Ag) nanocomposite thin films to be utilised in various practical applications. First, four samples of CNT solution and different ratios of the polymer (P3HT) [0.1, 0.3, 0.5, and 0.7 wt.%] are prepared to form thin layer of P3HT@CNT nanocomposites by dip-coating method of Ag. To investigate the absorption and conductivity properties for use in various practical applications, structure, morphology, optical, and photoluminescence properties of CNT/P3HT @Ag nanocomposite are systematically evaluated in this study. In this regard, the UV/Vis/NIR spectrophotometer in the wavelength range of 350 to 700 nm is used to investigate the absorption, transmission spectrum, extinction coefficient (k) and refractive index of the samples prepared at room temperature. The XRD results indicate a slight increase in the crystallite size of the synthesized (CNT/ P3HT@Ag) nanocomposite compared to CNT/P3HT nanocomposite, which can be attributed to the better dispersion of the P3HT and its favorable wrapping around the carbon nanotube structures. FESEM results show that the Ag nanoparticles are acting as a bridge between the CNT and P3HT, creating a strong bond between the two materials that is strong enough to form thicker tubular structures. An appreciable increase in absorbance intensity (approximately 552 nm) is obtained by adding silver nanoparticles to the CNT/P3HT matrix at 0.5% of P3HT. Additionally, the prepared CNT/P3HT@Ag thin films show greater transmittance – more than 42%, 45%, 49%, and 48% for P3HT concentrations of 1%, 3%, 5%, and 7%, respectively. The preparation of the samples' extinction coefficient (k) and refractive index data show that the inclusion of silver nanoparticles to the CNT/P3HT nanocomposite matrix has a significant improvement over the previous samples (CNT/P3HT composite).

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Section: Field Emission Scanning Electron Microscopy (Fesem) Analysismentioning

confidence: 64%

Synthesis, Characterization and Functionalization of P3HT-CNT Nanocomposite Thin Films with Doped Ag2O

Abbas,

Koubaa,

Abdullah

2024

East Eur. J. Phys.

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“…According to the literature, these two peaks are likely related to covalent functionalization of polycyclic aromatic hydrocarbons 10 (** peak) and symmetric C C stretching deformations (* peak). [16][17][18] The amorphous carbon degree (ACD), which quantifies the percentage of amorphous carbon in the sample, can also be obtained based on the relative ratio between the integrated areas referent to the sp 3 and sp 2 domains, i.e. a comparative analysis of the first order D middle peak around 1500 cm -1 assigned to amorphous carbon (highlighted in yellow in Fig.…”

Section: Resultsmentioning

confidence: 99%

Raman spectroscopy fingerprint of stainless steel-MWCNTs nanocomposite processed by ball-milling

et al. 2018

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Stainless steel 304L alloy powder and multiwalled carbon nanotubes were mixed by ball-milling under ambient atmosphere and in a broad range of milling times, which spans from 0 to 120 min. Here, we provided spectroscopic signatures for several distinct composites produced, to show that the Raman spectra present interesting splittings of the D-band feature into two main sub-bands, D-left and D-right, together with several other secondary features. The G-band feature also presents multiple splittings that are related to the outer and inner diameter distributions intrinsic to the multiwalled carbon nanotube samples. A discussion about the second order 2D-band (also known as G′-band) is also provided. The results reveal that the multiple spectral features observed in the D-band are related to an increased chemical functionalization. A lower content of amorphous carbon at 60 and 90 min of milling time is verified and the G-band frequencies associated to the tubes in the outer diameters distribution is upshifted, which suggests that doping induced by strain is taking place in the milled samples. The results indicate that Raman spectroscopy can be a powerful tool for a fast and non-destructive characterization of carbon nanocomposites used in powder metallurgy manufacturing processes.

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“…In addition, nitrogen-containing compounds may not bind to the carbon skeleton firmly, which results in the volatilization of the dopants during high-temperature pyrolysis. For doping N in carbon materials, in situ polymerization showed great potential . Polypyrrole (PPy) had acted as a good nitrogen source to generate NCs owing to its unique structure, great stability, low toxicity, and easy preparation.…”

Section: Introductionmentioning

confidence: 99%

“…For doping N in carbon materials, in situ polymerization showed great potential. 33 Polypyrrole (PPy) had acted as a good nitrogen source to generate NCs owing to its unique structure, great stability, low toxicity, and easy preparation. Wang et al prepared N-doped carbon nanowires through the direct carbonization of polypyrrole nanowires and used them in supercapacitor.…”

Section: Introductionmentioning

confidence: 99%

Metal-Free Chemoselective Hydrogenation of Nitroarenes by N-Doped Carbon Nanotubes via In Situ Polymerization of Pyrrole

Zheng

Wang

et al. 2020

ACS Omega

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Chemoselective hydrogenation of nitroarenes to anilines is of great importance for the manufacture of pharmaceuticals, fine chemicals, and dyes. In this study, a series of metal-free N-doped carbon nanotubes (NCNTs) have been prepared by the carbonization of in situ polymerized pyrrole on CNTs. The concentration of pyrrole, pyrolysis temperature, and the outside diameter of CNTs were investigated to improve the catalytic performance. As characterized by Raman and X-ray photoelectron spectroscopy (XPS), the optimal catalyst (NCNTs-800) possessed a unique structure doped with the same content of pyrrolic N and graphitic N. The activity and selectivity of NCNTs-800 have been evaluated for the selective hydrogenation of substituted nitroarenes. Highly selective hydrogenation of the nitro group of 12 different substrates has been achieved on NCNTs-800, even in the presence of a fragile iodo group. The hydrogenation reaction on N-doped CNTs from polypyrrole involved a mixture of different hydrogen species including nonpolar H radicals. In addition, stability and recyclability of NCNTs-800 have been tested.

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Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties

Cited by 17 publications

References 36 publications

Synthesis, Characterization and Functionalization of P3HT-CNT Nanocomposite Thin Films with Doped Ag2O

Synthesis, Characterization and Functionalization of P3HT-CNT Nanocomposite Thin Films with Doped Ag2O

Raman spectroscopy fingerprint of stainless steel-MWCNTs nanocomposite processed by ball-milling

Metal-Free Chemoselective Hydrogenation of Nitroarenes by N-Doped Carbon Nanotubes via In Situ Polymerization of Pyrrole

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