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Performance evaluation of thin film silicon solar cell based on dual diffraction grating.

Dubey RS, Saravanan S, Kalainathan S - Nanoscale Res Lett (2014)

Bottom Line: Accordingly, new design engineering of solar cells has been emphasized and found to be effective to achieve improved performance.Use of metal layer as a part of back reflector has found to be promising for minimum requirement of DBR pairs.The effect of grating and anti-reflection coating thicknesses are also investigated for absorption enhancement.

View Article: PubMed Central - PubMed

Affiliation: Advanced Research Laboratory for Nanomaterials and Devices, Department of Nanotechnology, Swarnandhra College of Engineering and Technology, Seetharampuram, Narsapur, Andhra Pradesh, India, rag_pcw@yahoo.co.in.

ABSTRACT
Light-trapping structures are more demanding for optimal light absorption in thin film silicon solar cells. Accordingly, new design engineering of solar cells has been emphasized and found to be effective to achieve improved performance. This paper deals with a design of thin film silicon solar cells and explores the influence of bottom grating and combination of top and bottom (dual) grating as a part of back reflector with a distributed Bragg reflector (DBR). Use of metal layer as a part of back reflector has found to be promising for minimum requirement of DBR pairs. The effect of grating and anti-reflection coating thicknesses are also investigated for absorption enhancement. With optimization, high performance has been achieved from dual grating-based solar cell with a relative enhancement in short-circuit current approximately 68% while it was approximately 55% in case of bottom grating-based solar cell. Our designing efforts show enhanced absorption of light in UV and infrared part of solar spectrum.

No MeSH data available.


Short-circuit current of cell D and comparison of absorption spectra. Short-circuit current of cell D (a) as a function of anti-reflection coating and grating thickness and absorption spectra (b) before and after optimization, respectively.
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Fig3: Short-circuit current of cell D and comparison of absorption spectra. Short-circuit current of cell D (a) as a function of anti-reflection coating and grating thickness and absorption spectra (b) before and after optimization, respectively.

Mentions: The best performed solar cell D is again modeled for the optimization of anti-reflection coating layer thickness (tarc) and grating thickness (Gt) which is shown in Figure 3a. The optimal short-circuit current approximately 28.6 mA/cm2 is obtained at tarc = 80 nm and further it is found to be improved approximately 29.2 mA/cm2at Gt = 400 nm. These optimized values of tarc and Gt were used to remodel the solar cell and observed an enhancement in absorption. Figure 3b shows the absorption spectra of optimized and without optimized solar cells as a function of incident solar spectrum. We can observe the broadening of light absorption curve in the range 470 to 725 nm and further enhanced absorption in infrared part of wavelength.Figure 3


Performance evaluation of thin film silicon solar cell based on dual diffraction grating.

Dubey RS, Saravanan S, Kalainathan S - Nanoscale Res Lett (2014)

Short-circuit current of cell D and comparison of absorption spectra. Short-circuit current of cell D (a) as a function of anti-reflection coating and grating thickness and absorption spectra (b) before and after optimization, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494017&req=5

Fig3: Short-circuit current of cell D and comparison of absorption spectra. Short-circuit current of cell D (a) as a function of anti-reflection coating and grating thickness and absorption spectra (b) before and after optimization, respectively.
Mentions: The best performed solar cell D is again modeled for the optimization of anti-reflection coating layer thickness (tarc) and grating thickness (Gt) which is shown in Figure 3a. The optimal short-circuit current approximately 28.6 mA/cm2 is obtained at tarc = 80 nm and further it is found to be improved approximately 29.2 mA/cm2at Gt = 400 nm. These optimized values of tarc and Gt were used to remodel the solar cell and observed an enhancement in absorption. Figure 3b shows the absorption spectra of optimized and without optimized solar cells as a function of incident solar spectrum. We can observe the broadening of light absorption curve in the range 470 to 725 nm and further enhanced absorption in infrared part of wavelength.Figure 3

Bottom Line: Accordingly, new design engineering of solar cells has been emphasized and found to be effective to achieve improved performance.Use of metal layer as a part of back reflector has found to be promising for minimum requirement of DBR pairs.The effect of grating and anti-reflection coating thicknesses are also investigated for absorption enhancement.

View Article: PubMed Central - PubMed

Affiliation: Advanced Research Laboratory for Nanomaterials and Devices, Department of Nanotechnology, Swarnandhra College of Engineering and Technology, Seetharampuram, Narsapur, Andhra Pradesh, India, rag_pcw@yahoo.co.in.

ABSTRACT
Light-trapping structures are more demanding for optimal light absorption in thin film silicon solar cells. Accordingly, new design engineering of solar cells has been emphasized and found to be effective to achieve improved performance. This paper deals with a design of thin film silicon solar cells and explores the influence of bottom grating and combination of top and bottom (dual) grating as a part of back reflector with a distributed Bragg reflector (DBR). Use of metal layer as a part of back reflector has found to be promising for minimum requirement of DBR pairs. The effect of grating and anti-reflection coating thicknesses are also investigated for absorption enhancement. With optimization, high performance has been achieved from dual grating-based solar cell with a relative enhancement in short-circuit current approximately 68% while it was approximately 55% in case of bottom grating-based solar cell. Our designing efforts show enhanced absorption of light in UV and infrared part of solar spectrum.

No MeSH data available.