Relation of the Electroluminescence Measurements to A-Si.H Solar Cell Parameters

1995 ◽  
Vol 377 ◽  
Author(s):  
Keda Wang ◽  
Daxing Han
Keyword(s):  
Solar Cell ◽  
Energy Spectrum ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Room Temperature ◽  
Energy Conversion Efficiency ◽  
Initial Energy ◽  
Open Circuit ◽  
Cell Parameters ◽  
Cell Energy

ABSTRACTWe have measured the intensity of electroluminescence (EL) and its energy spectrum in a-Si:H solar cells having an initial energy conversion efficiency from 5.75 to 9.8 %, and open-circuit voltages (Voc) between 0.799 and 0.952 V. We found that (a) at room temperature, EL efficiency is proportional to the initial solar cell energy conversion efficiency; (b) the defect energy distribution in the i-layer can be detected by EL energy spectrum at room temperature; and (c) Voc is simply related to the quasi-Fermi level splitting obtainable in the i-layer and that the buffer layer serves to increase this splitting.

Study of Eleiodoxa conferta (Kelubi) Fruit as Dye-Sensitized Solar Cell (DSSC) for Energy Conversion Efficiency

2017 ◽  
Vol 888 ◽  
pp. 353-356
Author(s):  
Hidayani Jaafar ◽  
Siti Nazihah Safri
Keyword(s):  
Solar Cell ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Voltage Measurement ◽  
Fundamental Study ◽  
Dye Sensitizer ◽  
Current Voltage

Dye-Sensitizer Solar Cell (DSSC) is preferable because it is mimicking of photosynthesis that able to use any extraction from organic substances so it is more eco-friendly and economically device in utilising photon as source of electricity. Therefore, this is a fundamental study and the purpose is to investigate the extend ability of extraction from Eleiodoxaconferta fruit parts (young flesh, pickled flesh and seed) using DSSC in order to generate electricity. The energy conversion efficiency of the assembled DSSCs is compared by conducting current-voltage measurements based on the titanium dioxide (TiO2) thickness and dye-sensitizer use. Results show only pickled flesh contained both crystalline (18.9%) and amorphous (81.1%) structure and proven other samples (young flesh and seed) were organic compound as the XRD pattern show noise peaks. The highest absorbance with peak range of wavelength between 555 nm to 565 nm of 70% concentration of young flesh extraction gives 3.74 a.u.. Meanwhile, the best performance of DSSC was recorded by young flesh with 2 layer thicknesses of TiO2 with open circuit, Voc = 0.663 V, short circuit, Isc= 0.077 mA, fill factor, FF= 0.84 gives 0.43% efficiency of current-voltage measurement.

scholarly journals Perovskite/Silicon Tandem Solar Cells: From Detailed Balance Limit Calculations to Photon Management

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad I. Hossain ◽  
Wayesh Qarony ◽  
Sainan Ma ◽  
Longhui Zeng ◽  
Dietmar Knipp ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Detailed Balance ◽  
Energy Conversion Efficiency ◽  
Tandem Solar Cells ◽  
Cell Parameters ◽  
Photon Management ◽  
Detailed Balance Limit

Abstract Energy conversion efficiency losses and limits of perovskite/silicon tandem solar cells are investigated by detailed balance calculations and photon management. An extended Shockley–Queisser model is used to identify fundamental loss mechanisms and link the losses to the optics of solar cells. Photon management is used to minimize losses and maximize the energy conversion efficiency. The influence of photon management on the solar cell parameters of a perovskite single-junction solar cell and a perovskite/silicon solar cell is discussed in greater details. An optimized solar cell design of a perovskite/silicon tandem solar cell is presented, which allows for the realization of solar cells with energy conversion efficiencies exceeding 32%.

scholarly journals Low Recombination Firing-Through Al Paste for N-Type Solar Cell with Boron Emitter

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 765
Author(s):  
Peng Zhu ◽  
Yuan Liu ◽  
Chengjiang Cao ◽  
Juan Tian ◽  
Aichuang Zhang ◽  
...  
Keyword(s):  
Solar Cell ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Front Surface ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Contact Resistivity ◽  
Silicon Sample ◽  
Front Side ◽  
Cell Front

A kind of low recombination firing-through screen-printing aluminum (Al) paste is proposed in this work to be used for a boron-diffused N-type solar cell front side metallization. A front side fire-through contact (FTC) approach has been carried out for the formation of local contacts for a front surface passivated solar cell. With a low contact resistivity (ρc) of 1.0 mΩ·cm2, good ohmic contact between the boron-doped front surface of the silicon sample and the Al paste was realized. To obtain a good energy conversion efficiency, a balance can be achieved between the open circuit voltage (Voc) and contact resistivity (ρc) of the cell by combining suitable Al powders and appropriate additives. The detailed micro-contact difference in Si/metallization between the firing-through Al paste and silver-aluminum (Ag-Al) paste was analyzed. The dark saturation current density beneath the metal contact (J0, metal) of the Si/metallization region using our firing-through Al paste was discussed, which was proven to be 61% lower than using Ag-Al paste. The pseudo energy conversion efficiency of the cell using Al paste measured by Suns-VOC was also higher than using Ag-Al paste. The role of Al paste in low surface metal recombination is discussed. The utilization of this new kind of Al paste was much cheaper and more convenient, compared to the traditional process using Ag or Ag-Al paste.

The Effect of Temperature on Anatase TiO2 Photoanode for Dye Sensitized Solar Cell

2018 ◽  
Vol 273 ◽  
pp. 146-153 ◽  
Author(s):  
Nurnaeimah Jamalullail ◽  
Ili Salwani Mohamad ◽  
Mohd Natashah Norizan ◽  
Norsuria Mahmed
Keyword(s):  
Solar Cell ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Annealing Temperature ◽  
Energy Conversion Efficiency ◽  
Semiconductor Material ◽  
Dye Sensitized Solar Cell ◽  
Effect Of Temperature ◽  
Dye Sensitized ◽  
Power Application

Dye sensitized solar cell (DSSC) is a well-known photovoltaic device that is used for low power application. One of the main components for DSSC is semiconductor material photoanode which will provide the pathway for electron transportation and thus determine the energy conversion efficiency of the DSSC. The most commonly used material for the semiconductor photoanode is titanium dioxide (TiO2).TiO2is a semiconductor material with wide bandgap material that is existed in three crystalline phase; rutile, anatase and brookite. This paper emphasizes the best annealing temperature for commercialized TiO2, 98% anatase powder where the temperature varies from 300 oC – 600 oC. Through this research, the best annealing temperature for anatase TiO2photoanode is at 420 °C (0.094%) with the crystallite size of 18.76 nm and particle size of 19 nm that is favorable for the dye attached and thus enhances the energy conversion efficiency of the DSSC.

PHOTOELECTRICAL PROPERTIES OF p-TYPE AND n-TYPE ELECTRICAL CONDUCTIVITY AMORPHOUS CARBON THIN FILMS FOR APPLICATION IN ECONOMICAL CARBON-BASED SOLAR CELLS

2005 ◽  
Vol 12 (03) ◽  
pp. 343-350 ◽  
Author(s):  
M. RUSOP ◽  
T. SOGA ◽  
T. JIMBO
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Fill Factor ◽  
Short Circuit ◽  
Wavelength Region ◽  
Short Circuit Current ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Photon Absorption ◽  
P Type

The successful deposition of boron ( B )-doped p-type ( p-C:B ) and phosphorous ( P )-doped n-type ( n-C:P ) carbon ( C ) films, and fabrication of p-C:B on silicon ( Si ) substrate ( p-C:B/n-Si ) and n-C:P/p-Si cells by the technique of pulsed laser deposition (PLD) using graphite target is reported. The cells' performances are represented in the dark I–V rectifying curve and I–V working curve under illumination when exposed to AM 1.5 illumination condition (100 mW/cm2, 25°C). The open circuit voltage (V oc ) and short circuit current density (J sc ) for p-C:B/n-Si are observed to vary from 230–250 mV and 1.5–2.2 mA/cm2, respectively, and to vary from 215–265 mV and 7.5–10.5 mA/cm2, respectively, for n-C:P/p-Si cells. The p-C:B/n-Si cell fabricated using the target with the amount of B by 3 Bwt% shows highest energy conversion efficiency, η = 0.20%, and fill factor, FF = 45%, while, the n-C:P/p-Si cell with the amount of P by 7 Pwt% shows highest energy conversion efficiency, η = 1.14%, and fill factor, FF = 41%. The quantum efficiencies (QE) of the p-C:B/n-Si and n-C:P/p-Si cells are observed to improve with Bwt% and Pwt%, respectively. The contributions of QE are suggested to be due to photon absorption by carbon layer in the lower wavelength region (below 750 nm) and Si substrates in the higher wavelength region. The dependence of B and P content on the electrical and optical properties of the deposited films, and the photovoltaic characteristics of the respective p-C:B/n-Si and n-C:P/p-Si heterojunction photovoltaic cells, are discussed.

Improvement of Photovoltaic Module for Increasing Energy Conversion Efficiency

2013 ◽  
Vol 448-453 ◽  
pp. 1428-1432 ◽  
Author(s):  
Warachit Phayom
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Tilt Angle ◽  
Horizontal Plane ◽  
Open Circuit Voltage ◽  
Cooling System ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Back Side ◽  
Pv Module

For increasing energy conversion efficiency of PV module, this study was divided to two experiments. The first experiment was to investigate optimal tilt angle of PV module from 0-35° from horizontal plane in facing south for using in Udon thani Province and neighbouring in Thailand. The second experiment was to decrease PV module temperature and to determine appropriate cooling system by using water and small spray nozzles between front and back PV module. The results found, conversion efficiency was high during 15°-25° from horizontal plane for tilt angle in facing south, especially at 25° in whole year. Using thin film by spray nozzles at the front side was higher open circuit voltage and energy conversion efficiency than back side, with 6.06% of increasing open circuit voltage and 1.93% of increasing energy conversion efficiency when compared with no cooling system, due to can thoroughly distribute water on surface area and easily install.

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