Study of LSPR-enhanced absorption for solar cell applications: preliminary results

2009 ◽  
Author(s):  
O. Guilatt ◽  
B. Apter ◽  
U. Efron
Keyword(s):  
Solar Cell ◽  
Preliminary Results ◽  
Enhanced Absorption

scholarly journals Characterization and Treatment of Titanium Dioxide via Ultrasonic Process withMelastoma malabathricumas Sustainable Sensitizer for Photovoltaic Solar Cell

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Anika Zafiah M. Rus ◽  
Nur Munirah Abdullah ◽  
M. F. L. Abdullah
Keyword(s):  
Solar Cell ◽  
Metal Oxide ◽  
Short Circuit ◽  
Open Circuit ◽  
Hydroxyl Groups ◽  
High Porosity ◽  
Enhanced Absorption ◽  
Melastoma Malabathricum ◽  
Atomic Force ◽  
Ultrasonic Process

Generation from the existing commercial devices costs about ten times more than the conventional methods. Therefore, this paper presents a thin-film dyed solar cell (DSC) of natural dyes fromMelastoma malabathricumfruits which consist of the carbonyl and hydroxyl groups of anthocyanin molecule that influences the performance of photosensitized effect due to its bound on the surface of filler. Experimental results comparing engineering grade (>99% purity) of metal oxide; U1 and U2 with treated metal oxide; U3 and U4 using ultrasonic process, which is to break the particle agglomeration from 0.37 μm down to 0.15 μm; this treatment led to a more “sponge-like” consistency with high porosity, enabling enhanced absorption and anchorage of the dye sensitizer. The microstructures of metal oxide were observed using Field Emission Scanning Electron Microscope (FESEM) and Atomic Force Microscope (AFM). Along with the highest performance ofI-Vmeasurement given by U4 with open circuit,Voc = 0.742 V, short circuit,Isc = 0.36 mA, fill factor, FF = 57.012 gives 0.039% efficiency the examples for the first outdoor application upon sunlight illumination of such DSC were also reported. Therefore, this ultrasonic treatment and novel dye fromMelastoma malabathricumfruit are reliable to be used for further application.

Enhanced absorption in the space charge region of GaAs solar cells

2021 ◽  
Author(s):  
Yangfeng Li ◽  
Wenqi Wang ◽  
Chen Yue ◽  
Xiaotao Hu ◽  
Yimeng Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Absorption Coefficient ◽  
Space Charge ◽  
Space Charge Region ◽  
Solar Spectrum ◽  
Enhanced Absorption

Abstract The photo-generated currents of GaAs solar cells with different lengths of space charge region are obtained and analyzed in this study. The enhanced absorption coefficient in the space charge region is adopted to calculate the photo-generated current based on the solar cell physics theory. The calculated currents coincide well with the experimental currents both under single wavelength incidence and solar spectrum irradiation conditions.

Continuous (CFA) CH4 record of the Elbrus ice core, Caucasus (preliminary results)

2020 ◽  
Author(s):  
Diana Vladimirova ◽  
Xavier Faïn ◽  
Patrick Ginot ◽  
Stanislav Kutuzov ◽  
Vladimir Mikhalenko
Keyword(s):  
High Resolution ◽  
Optical Feedback ◽  
Ice Core ◽  
Flow Analysis ◽  
Preliminary Results ◽  
Mixing Ratios ◽  
Enhanced Absorption ◽  
Ice Core Record ◽  
In Situ Production

<p>Methane (CH<sub>4</sub>) is the third most powerful greenhouse gas. However, its warming potential is two orders of magnitude higher than of carbon dioxide and its residence time in the atmosphere is only 9.1 ± 0.9 years. It makes CH<sub>4</sub> a good indicator of rapid climate variations both under natural conditions and due to the anthropogenic influence.</p><p>The Elbrus ice core was drilled in 2009 on the Western Plato (43°20’53.9’’N, 42°25’36.0’’E) at elevation 5115 m a.s.l. It is 182 m long and is dated back to 280 ± 400 CE (Common Era). The CH<sub>4</sub> mixing ratios were analyzed using a continuous flow analysis (CFA) system paired with optical-feedback cavity-enhanced absorption spectroscopy. The measurements campaign was organized at Institut des Géosciences de l'Environnement (IGE), Grenoble, France. This is a first high-resolution mid-latitude CH<sub>4</sub> record. The record aims to better constrain the past evolution of mid-latitude methane sources.</p><p>Here we present preliminary results of the methane concentration measurements of the Elbrus ice core in high-resolution (CFA CH<sub>4</sub> record). We observe in situ production (max level 2900 ppb) and a baseline. We inspect a potential origin of the multiple spikes in the high-resolution record. Supposedly, either an in-situ production in the dust-rich layers occurred or a gas dissolution in the melt layers took place. However, the possibility of in-situ production during continuous gas extraction has to be further studied. The identified melt layers can serve as an indicator of interrupted stable water isotopic signal and may be supportive in the regional temperature reconstructions based on the Elbrus ice core record. A cleaned off the spikes record is inspected for the natural variability of the CH<sub>4</sub> baseline concentration related to the short-term climate and methane emissions variability.</p>

Enhanced absorption of solar cell made of photonic crystal by geometrical design

2015 ◽  
Vol 9 (1) ◽  
pp. 93-98 ◽  
Author(s):  
Asma Ouanoughi ◽  
Abdesselam Hocini ◽  
Djamel Khedrouche
Keyword(s):  
Solar Cell ◽  
Photonic Crystal ◽  
Geometrical Design ◽  
Enhanced Absorption
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