Amorphous solar cell on multilayer of SnO2/ZnO TCO substrate for full spectrum splitting solar cell application

2014 ◽  
Vol 92 (7/8) ◽  
pp. 917-919 ◽  
Author(s):  
Sinae Kim ◽  
Dong-won Kang ◽  
Porponth Sichanugrist ◽  
Makoto Konagai
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Solar Spectrum ◽  
Thin Film Solar Cells ◽  
Total Efficiency ◽  
Full Spectrum ◽  
Solar Cell Application ◽  
Splitting Technique ◽  
Spectrum Splitting ◽  
Hydrogenated Amorphous

To increase the performance of thin film solar cells, the solar spectrum splitting technique has been considered and studied. It was found from the simulation that the total efficiency of nearly 25% can be obtained at the splitting wavelength of 614 nm with the top cell using higher band gap material. The experiment has been carried out to verify the simulation results. Up to now a total efficiency of about 22.0% has been obtained using hydrogenated amorphous silicon (a-Si:H) and Cu(In1–x,Gax) as the top and bottom cells, respectively, at a splitting wavelength of 620 nm. In this study, we have developed a multilayer of transparent and conductive oxide (TCO) substrate of a-Si:H solar cell with better electrical properties especially improved fill factor and better electrical compatibility. This multilayer TCO is suitable for the splitting technique to enhance the performance at the short-wavelength of the top cell.

Development of thin-film solar cells using solar spectrum splitting technique

2012 ◽  
Author(s):  
Sinae Kim ◽  
Fuminori Takahashi ◽  
Shunsuke Kasashima ◽  
Porponth Sichanugrist ◽  
T. Kobayashi ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Spectrum ◽  
Thin Film Solar Cells ◽  
Splitting Technique ◽  
Spectrum Splitting

Development of thin-film solar cells using solar spectrum splitting technique

2013 ◽  
Vol 119 ◽  
pp. 214-218 ◽  
Author(s):  
Sinae Kim ◽  
Shunsuke Kasashima ◽  
Porponth Sichanugrist ◽  
Taizo Kobayashi ◽  
Tokio Nakada ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Spectrum ◽  
Thin Film Solar Cells ◽  
Splitting Technique ◽  
Spectrum Splitting

High Efficiency Solar to Electric Energy Conversion through Spectrum Splitting and Multi-channel Full Spectrum Harvesting

2013 ◽  
Vol 1493 ◽  
pp. 31-36 ◽  
Author(s):  
Lirong Zeng Broderick ◽  
Tiejun Zhang ◽  
Marco Stefancich ◽  
Brian R. Albert ◽  
Evelyn Wang ◽  
...  
Keyword(s):  
Electricity Generation ◽  
High Efficiency ◽  
Waste Heat ◽  
Electric Energy ◽  
Solar Spectrum ◽  
Thermal Storage ◽  
High Energy ◽  
Optimized Design ◽  
Full Spectrum ◽  
Spectrum Splitting

ABSTRACTA system combining photovoltaic (PV) and solar thermal approaches is designed to convert solar energy to electricity with high efficiency across the full solar spectrum. Concentrated solar spectrum is split into two parts: PV and thermal. The PV part of the spectrum is further split into several subbands directed to bandgap appropriate solar cells on an inexpensive Si substrate. Epitaxial Ge on Si is used as a virtual substrate for III-V semiconductor growth. At long and very short wavelengths where PV efficiency is low, solar radiation is directed to a high temperature thermal storage tank for electricity generation using heat engines. The potential of using PV waste heat due to thermalization of high energy photoelectrons for electricity generation is also investigated. Detailed optical and thermal analysis show that with optimized design and neglecting optical component loss, system power conversion efficiency can reach 56%, including more than 16% absolute contribution from thermal storage.

Improvement of Mo/Cu2ZnSnS4 interface for Cu2ZnSnS4 (CZTS) thin film solar cell application

2014 ◽  
Vol 1638 ◽  
Author(s):  
Hongtao Cui ◽  
Xiaolei Liu ◽  
Xiaojing Hao ◽  
Fangyang Liu ◽  
Ning Song ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Thin Film Solar Cell ◽  
Contact Region ◽  
Thin Film Solar Cells ◽  
Czts Thin Film ◽  
Back Contact ◽  
Secondary Phases ◽  
Solar Cell Application

ABSTRACTThe focus of this work is on back contact improvement for sputtered CZTS thin film solar cells. Three methods have been investigated including a thin Ag coating, a thin ZnO coating on the Mo back contact and rapid thermal annealing of the back contact. All of these methods have been found to reduce defects such as voids as well as secondary phases at the back contact region and inhibit the formation of MoS2. Consequently all the mothods effectively enhances Voc, Jsc, FF and therefore efficiency significantly.

Spectrally Resolved Fill Factor Measurements on a-Si:H Based Solar Cell Structures

1996 ◽  
Vol 426 ◽  
Author(s):  
Michael Wagner ◽  
Dimitrios Peros ◽  
Stephan Guse ◽  
Markus Böhm
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Charge Compensation ◽  
Open Circuit ◽  
Cell Structures ◽  
Deposition Parameters ◽  
Wide Range ◽  
Current Densities ◽  
Spectrally Resolved ◽  
Hydrogenated Amorphous

AbstractThis work presents essential differences in the fill factors (FF) of pin and nip solar cell structures based on hydrogenated amorphous silicon (a-Si:H). The nomenclature “pin’ (‘nip’ respectively) determines the deposition sequence of the single layers. Fill factor measurements are carried out with illumination through p- and n-layers at different wavelengths. The use of laser light provides a wide range of illumination levels and photo current densities of up to 14mA/cm2. The spectrally resolved FF measurements indicate an incorporation of dopants in the i-layer depending on the layer deposited first. Nip and pin structures generally show opposite FF dispersion when illuminated through the same layer. However, due to the slight n-conductivity of intrinsic a-Si:H material, a weak boron incorporation leads to a net charge compensation in the ilayer. In contrast to other investigations we do not find a significant deviation in the open circuit voltages of the pin and nip devices as long as the deposition parameters of the single layers are identical.

scholarly journals Fabrication and Characterization of Thin Film Solar Cell Made from CuIn0.75Ga0.25S2Wurtzite Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Fengyan Zhang ◽  
Chivin Sun ◽  
Cyril Bajracharya ◽  
Rene G. Rodriguez ◽  
Joshua J. Pak
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Fill Factor ◽  
Single Step ◽  
Thin Film Solar Cells ◽  
Wurtzite Phase ◽  
Cigs Thin Film ◽  
Fabrication And Characterization ◽  
First Time

CuIn0.75Ga0.25S2(CIGS) thin film solar cells have been successfully fabricated using CIGS Wurtzite phase nanoparticles for the first time. The structure of the cell is Glass/Mo/CIGS/CdS/ZnO/ZnO:Al/Ag. The light absorption layer is made from CIGS Wurtzite phase nanoparticles that are formed from single-source precursors through a microwave irradiation. The Wurtzite phase nanoparticles were converted to Chalcopyrite phase film through a single-step annealing process in the presence of argon and sulfur at 450°C. The solar cell made from Wurtzite phase nanoparticles showed 1.6% efficiency and 0.42 fill factor.

scholarly journals Plasmonic Nanostructure for Enhanced Light Absorption in Ultrathin Silicon Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Jinna He ◽  
Chunzhen Fan ◽  
Junqiao Wang ◽  
Yongguang Cheng ◽  
Pei Ding ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Surface Plasmon ◽  
Light Absorption ◽  
Solar Spectrum ◽  
Thin Film Solar Cells ◽  
Absorption Enhancement ◽  
Plasmonic Nanostructures ◽  
Cell Design

The performances of thin film solar cells are considerably limited by the low light absorption. Plasmonic nanostructures have been introduced in the thin film solar cells as a possible solution around this issue in recent years. Here, we propose a solar cell design, in which an ultrathin Si film covered by a periodic array of Ag strips is placed on a metallic nanograting substrate. The simulation results demonstrate that the designed structure gives rise to 170% light absorption enhancement over the full solar spectrum with respect to the bared Si thin film. The excited multiple resonant modes, including optical waveguide modes within the Si layer, localized surface plasmon resonance (LSPR) of Ag stripes, and surface plasmon polaritons (SPP) arising from the bottom grating, and the coupling effect between LSPR and SPP modes through an optimization of the array periods are considered to contribute to the significant absorption enhancement. This plasmonic solar cell design paves a promising way to increase light absorption for thin film solar cell applications.

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