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With more and more wearable electronics entering the market, the bottleneck of batteries attracts considerable attentions because of its limited lifetime and energy storage capacity. To solve this problem, triboelectric nanogenerators (TENG) have recently been researched to be applied on harvesting mechanical energy from ambient environment, which is of great significance in the field of energy conversion...
Exploitation of the incoming solar energy is more than adequate to sufficiently meet the energy demands of the modern world. Photovoltaics constitute devices that convert solar energy to electricity. Among them, silicon photovoltaics have been extensively studied, although an emphasis has been given in the last decades towards third generation photovoltaics, such as dye sensitized solar cells (DSSCs)...
The efficiency in the electricity generation provided by microbial fuel cells represents an important aspect to be improved in the development of new devices. In this work, we have explored a simple and low cost microbial fuel cell activated by Escherichia coli, which is immersed in nutrients (tryptic soy broth) with electron transfer mediated by methylene blue. Dual chamber reactor has compartments...
This work provides further insight on the long term stability, of Dye Sensitized Solar Cells (DSCs) assessed through prolong thermal aging at 85°C in dark. The investigation is focused on Bis(isothiocyanato)(4,4′-dicarboxylato-2,2′- bipyridine)(4,4′-dinonyl-2,2′-bipyridine)ruthenium(II) (Z907) sensitized devices employing commercially available ionic liquid electrolyte (livion 12, L12) with high boiling...
Hybrid organometallic halide perovskite photovoltaics has seen remarkable growth in world wide research and power conversion efficiencies (PCEs) over the last two years. Key advantages of perovskites devices, together with high PCEs typical of inorganic semiconductors, are represented by the ease of deposition of the precursors of the perovskite (via ink solutions) and their low temperature processing...
Dye sensitized solar cells (DSSCs) constitute a good alternative for harnessing the solar energy since they are based on earth abundant nanocomposite materials, their manufacture requires simple chemical processes, which are more or less benign, and have low fabrication cost. DSSCs' efficiency has just reached 13% and there is even more room for improvement. Researchers are trying to improve each...
The intermixing of donor and acceptor materials in bulk-heterojunction organic solar cells can lead to islands of one material completely embedded in the other. This might have influence on charge carrier dynamics because the inclusions act as trap states. Kinetic Monte Carlo simulations offer a powerful method to investigate such effects considering a realistic blend morphology. We compare real blend...
High power energy storage devices, such as Li-ion batteries and supercapacitors, are critical for the development of zero-emission electric vehicles, large scale smart grid, energy efficient ships and locomotives, wearable devices and portable electronics. This review will focus on our progress with the developments of nanocomposite electrodes capable to improve both the energy and power storage characteristics...
High-aligned PVDF nanofiber mats-based nanogenerators are prepared via electrospinning using a high-speed rolling collector without any post-poling treatment. The effect of alignment on ß phase composition and output voltage of the different alignment samples are investigated. The anisotropic of output voltage based on the fiber alignment and bending direction (the fiber aligned direction, marked...
This work presents, a new efficient structure for mesoscopic organometal halide perovskite based solar cells (PSCs) employing vacuum evaporated zinc-phthalocyanine as hole transporting layer. The proposed device structure overcame 8% in efficiency and it is promising in term of stability and low cost manufacturing process.
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