scholarly journals Biomass-derived carbon electrodes for supercapacitors and hybrid solar cells: towards sustainable photo-supercapacitors

2021 ◽  
Author(s):  
Nilanka M. Keppetipola ◽  
Céline Olivier ◽  
Thierry Toupance ◽  
Ludmila Cojocaru
Keyword(s):  
Electrical Conductivity ◽  
Solar Cells ◽  
Electrochemical Properties ◽  
Carbon Materials ◽  
Low Cost ◽  
Carbon Electrodes ◽  
Hybrid Solar Cells ◽  
Potential Applications ◽  
Electrodes For Supercapacitors

Due to their outstanding electrochemical properties, electrical conductivity, flexibility, and low-cost, carbon materials open up new opportunities for the design of compact devices with a wide variety of potential applications....

The Development of Conductive Pastes for Solar Cells

2012 ◽  
Vol 557-559 ◽  
pp. 1201-1204
Author(s):  
Jung Ting Tsai ◽  
Chun Yuan Huang ◽  
Shung Tian Lin
Keyword(s):  
Electrical Conductivity ◽  
Solar Cells ◽  
Electrochemical Properties ◽  
Conversion Efficiency ◽  
Sintering Temperature ◽  
Low Cost ◽  
Glass Frit ◽  
Organic Binder ◽  
Semiconductor Substrate ◽  
Physical Chemical

Electrode pastes are used in solar cells for the formation of electrodes at both ends of the semiconductor substrate. The physical, chemical, and electrochemical properties of electrode pastes have important influences on the conversion efficiency and stability of the solar cells. Generally speaking, the constituents of electrode paste include organic binder, solvent, metallic conductive powders, glass frit, and some minor additives, all specially formulated to attain the properties of good electrical conductivity, wide sintering temperature, low warp, low pollution, and low cost.

Ultra-low-cost coal-based carbon electrodes with seamless interfacial contact for effective sandwich-structured perovskite solar cells

Carbon ◽  
2019 ◽  
Vol 145 ◽  
pp. 290-296 ◽  
Author(s):  
Fanning Meng ◽  
Liguo Gao ◽  
Yeling Yan ◽  
Junmei Cao ◽  
Ning Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Carbon Electrodes ◽  
Interfacial Contact

Ion Beam Modification of Carbon Materials

2005 ◽  
Vol 107 ◽  
pp. 107-110
Author(s):  
Masaya Iwaki
Keyword(s):  
Electrical Conductivity ◽  
Wear Resistance ◽  
Cell Adhesion ◽  
Ion Implantation ◽  
Electrochemical Properties ◽  
Surface Properties ◽  
Carbon Materials ◽  
Ion Beam ◽  
Ion Beam Modification ◽  
Ion Species

A study has been made of surface properties of carbon materials modified by ion beams. Substrates used were natural diamonds, glass-like carbon plates and polymer sheets. Ion species were chemically-active elements such as C, N and O, inert gas elements such as He, Ne and Ar, and metallic elements such as Cr and Ti. It was found that diamond becomes electrically conductive in ion implanted layers, which are amorphous or graphite-like structures. Electrical conductivity depends on implanted species, doses and target temperatures. It was found that glass-like carbon consisting of graphite and disordered graphite becomes amorphous due to ion beam bombardment. Amorphization causes the wear resistance to improve. The electrochemical properties changes depending on implanted species. The wear resistance and electrochemical properties depended on the target temperature during ion implantation. Ion beam bombardment to polymers has been carried out to control the electrical conductivity, cell adhesion and bio-compatibility. The electrical conductivity of polyimide films increases as the dose increases. The saturated sheet resistivity of implanted layers depends on ion species, dose and dose rate. It was found that the cell adhesion can be controlled by ion beam bombardment. The results were used in the fields of clinical examinations. In summary, ion beam bombardment to carbon materials is useful to control the carbon structures and surface properties depending on ion implantation conditions.

Emerging Scope of Hybrid Solar Cells in Organic Photovoltaic Applications by Incorporating Nanomaterials

2012 ◽  
Vol 548 ◽  
pp. 143-146 ◽  
Author(s):  
Nishu Gupta ◽  
K.M. Gupta
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Field Effect ◽  
Size Structure ◽  
Field Effect Transistors ◽  
Chemical Properties ◽  
Nano Particles ◽  
Optical Coatings ◽  
Hybrid Solar Cells ◽  
Potential Applications

In recent years, semiconductor nanomaterials have been extensively studied and reports are available for their preparation methods, physical and chemical properties of nanoparticles and their characterization techniques. Because of their potential applications, ZnS nanoparticles are recently major area of research. It is an important inorganic material for a variety of applications including photoconductors, solar cells, field effect transistors, sensors, transducers optical coatings and light-emitting materials. Inorganic nano-particles have found potential application in various electronic devices. Synthesis, shape and size control are important issues for nano-particles research. Various nano-structured materials have found potential applications in optical and electrical devices such as photoconductors, LEDs, solar cells, field effect transistors, optical coatings etc. ZnS has wide band gap ranging from 3.5 to 3.8 eV at room temperature and the band gap can be tuned in the UV region by controlling the size of the nano-particles. In the present work we have studied the synthesis of ZnS nano-particles, their characterization to investigate various properties such as size, structure, band gap and luminescence via different characterization tools. The particles were then used as acceptors for fabrication of organic hybrid solar cells.

scholarly journals Performance of Microporous Carbon Electrodes for Supercapacitors: Comparing Graphene with Disordered Materials

2018 ◽  
Author(s):  
Trinidad Mendez-Morales ◽  
Nidhal Ganfoud ◽  
Zhujie Li ◽  
Matthieu Haefele ◽  
Benjamin Rotenberg ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Carbon Materials ◽  
Structural Features ◽  
Carbon Electrodes ◽  
Disordered Materials ◽  
Surface Charges ◽  
The Past ◽  
Counter Ions ◽  
The One ◽  
Electrodes For Supercapacitors

Over the past decades, the specific surface area and the pore size distribution have been identified as the main structural features that govern the performance of carbon-based supercapacitors. As a consequence, graphene nanostructures have been identified as strong candidates for maximizing their capacitance. However, this hypothesis could not be thoroughly tested so far due to the difficulty of synthesizing perfect materials with high pore accesibility and a sufficiently large density. Here we perform molecular simulations of a series of perforated graphene electrodes with single pore sizes ranging from 7 to 10 Angstroms in contact with an adsorbed ionic liquid, and compare the capacitances (using various metrics) to the one obtained with a typical disordered nanoporous carbon. The latter displays better performances, an observation that we explain by analyzing the structure of the liquid inside the pores. It appears that although the smaller pores are responsible for the largest surface charges, larger ones are also necessary to store the counter-ions and avoid the formation of detrimental opposite charges on the carbon. These results rationalize the need for disordered or activated carbon materials to design efficient supercapacitors.

scholarly journals Bandgap tunability from synergistic mixture of Pandanus amaryllifolius and Curcuma longa as photo-absorber candidates

2021 ◽  
Vol 6 (1) ◽  
pp. 50-56
Author(s):  
Nik Muhammad Muqit Ali ◽  
Khairul Nizar Syazwan W.S.W. ◽  
Syed Muhammad Al-Amsyar ◽  
Hasiah Salleh ◽  
Hasyiya Karimah Adli
Keyword(s):  
Electrical Conductivity ◽  
Solar Cells ◽  
Curcuma Longa ◽  
Low Cost ◽  
Orbital System ◽  
New Approach ◽  
Natural Plant ◽  
Electronic Delocalization ◽  
Environmentally Safe ◽  
Pandanus Amaryllifolius

The application of natural plant-derived dyes to replace ruthenium-based material as photo-absorber in solar cells application, have been extensively studied. Several advantages such as low cost, abundant in supply, sustainability and environmentally-safe make natural materials as current favourite photo-absorber. Natural plant-derived dyes are known containing natural compounds (e.g. carotenoids, chlorophylls, anthocyanins) that have the characteristics of electronic delocalization in extended ?-orbital system involving in electronic transfer mechanism. To date, massive investigations were done to exploit this system to be used as a potential photo-absorber in solar cells. Due to this matter, the hybrid dyes from the mixture of Pandanus amaryllifolius (pandan, P) and Curcuma longa (turmeric, T) were successfully prepared and several physical characterizations were carried out to analyse the photo-absorber (sensitizer) properties. From the results obtained, the ratios of P:T was varied into 1:2, 1:4, 4:1, and 8:1. This ratio has changed the wavelength of absorbers that were slightly shifted and the indirect bandgap (Eg) also were significantly changed. With this new approach, the bandgap of the hybrid dyes as core point in modulating electrical conductivity of photo-absorber can be simply tuned. By implying two different extract dyes to form hybrid dyes, the bandgap was found decreased with higher ratio of T used. Overall results suggesting that by adjusting the ratio of hybrid dyes, the photo-absorber properties and the Eg values were differed and with slightly modification, better electrical conductivity can be expected for solar cells application.

scholarly journals Performance of Microporous Carbon Electrodes for Supercapacitors: Comparing Graphene with Disordered Materials

2018 ◽  
Author(s):  
Trinidad Mendez-Morales ◽  
Nidhal Ganfoud ◽  
Zhujie Li ◽  
Matthieu Haefele ◽  
Benjamin Rotenberg ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Carbon Materials ◽  
Structural Features ◽  
Carbon Electrodes ◽  
Disordered Materials ◽  
Surface Charges ◽  
The Past ◽  
Counter Ions ◽  
The One ◽  
Electrodes For Supercapacitors

Over the past decades, the specific surface area and the pore size distribution have been identified as the main structural features that govern the performance of carbon-based supercapacitors. As a consequence, graphene nanostructures have been identified as strong candidates for maximizing their capacitance. However, this hypothesis could not be thoroughly tested so far due to the difficulty of synthesizing perfect materials with high pore accesibility and a sufficiently large density. Here we perform molecular simulations of a series of perforated graphene electrodes with single pore sizes ranging from 7 to 10 Angstroms in contact with an adsorbed ionic liquid, and compare the capacitances (using various metrics) to the one obtained with a typical disordered nanoporous carbon. The latter displays better performances, an observation that we explain by analyzing the structure of the liquid inside the pores. It appears that although the smaller pores are responsible for the largest surface charges, larger ones are also necessary to store the counter-ions and avoid the formation of detrimental opposite charges on the carbon. These results rationalize the need for disordered or activated carbon materials to design efficient supercapacitors.

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