Enhanced light transmission for Si solar cells using anti-reflector of mesoporous silica with low refractive index

2007 ◽  
Author(s):  
Jia-Min Shieh ◽  
Chao-Kei Wang ◽  
Shich-Chuan Wu ◽  
Wei-Xin Ni ◽  
Hao-Chung Kuo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Solar Cells ◽  
Mesoporous Silica ◽  
Light Transmission ◽  
Si Solar Cells ◽  
Low Refractive Index

Effects of One-Dimensional Photonic Crystal on Thin Film Silicon Solar Cells

2013 ◽  
Vol 827 ◽  
pp. 49-53 ◽  
Author(s):  
Qi Wang ◽  
Hai Na Mo ◽  
Zi Qiao Lou ◽  
Ke Meng Yang ◽  
Yue Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
One Dimensional ◽  
Si Solar Cells ◽  
Refractive Index Difference

We have designed lateral contact thin film silicon-based solar cells with and without one-dimensional photonic crystals as back surface field layer. The photonic crystal comprises a distributed Bragg reflector (DBR) for trapping the light. Simulations demonstrate that energy conversion efficiency and short circuit current ISCfor c-Si solar cells with the photonic crystal structure are increased to 21.11% and 27.0 mA, respectively, from 18.33% and 22.8mA of the one without photonic crystal. In addition, the effects of DBRs consisting of different materials are investigated in our simulations. When the refractive index difference between sub-layers of the DBR is larger, the forbidden band width is broader, the reflectance of the DBR is higher, and more photons are reflected and trapped into the active region, then the absorption efficiency and the energy conversion efficiency of the solar cell are both increased. The bigger the refractive index difference of the DBRs sub-layers is, the broader the forbidden band width is. In addition, a-Si solar cells with and without DBR are also discussed.

High Polaried Transmission Effects for Double-Layer Metallic Grating Films on GaN Substrate

2011 ◽  
Vol 295-297 ◽  
pp. 1289-1293
Author(s):  
Bing Cao ◽  
Gui Ju Zhang ◽  
Qin Han ◽  
Chin Hua Wang ◽  
Jian Feng Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Double Layer ◽  
Transition Layer ◽  
Light Transmission ◽  
Light Emitting Diode ◽  
Extinction Ratio ◽  
Polarized Light ◽  
Incident Wavelength ◽  
Metallic Grating ◽  
Low Refractive Index

Highly polarized light transmission from GaN based light emitting diode is proposed using a double-layer metallic grating film and a dielectric transition layer. TM mode transmission and the polarized extinction ratio (ER) are calculated using commercial software, based on a full vector implementation of Rigorous Coupled Wave Analysis (RCWA) algorithm. Such a thin-film double-layer grating with subwavelength metallic stripes are designed and simulated by perfect parameters of period, thickness and filling factor for achieving good polarization properties. It is found that TM transmission and ER are almost stable and flat under different slit arrays of the double-layer grating. The polarized structure shows larger width of incident wavelength with a transition layer of a low refractive index than that of a high refractive index, but higher TM transmission and ER can be obtained for low refractive index transition layer. Flat sensitivity and high transmission of the TM mode on the double-layer metal grating thickness have been achieved. Up to 100nm range of the grating height can be employed to achieve TM transmission more than 92% while ER> 20dB. The results provide guidance in designing, optimizing and fabricating the integrated GaN-based and polarized photonic devices.

Broadband Anti-Reflective Structure with Mesoporous Silica of Low Refractive Index in Si Solar Panels

2008 ◽  
Author(s):  
Jia-Min Shieh ◽  
Li-Jung Liu ◽  
Jui-Chung Shiao ◽  
Chao-Kei Wang ◽  
Shich-Chuan Wu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Mesoporous Silica ◽  
Solar Panels ◽  
Low Refractive Index

scholarly journals Optical properties of PEDOT:PSS-silicon solar cells

2018 ◽  
pp. 118-121
Author(s):  
A. Mykytiuk ◽  
S. Kondratenko
Keyword(s):  
Refractive Index ◽  
Solar Cells ◽  
Spectroscopic Ellipsometry ◽  
Interfacial Layer ◽  
Optical Constants ◽  
Silicon Solar Cells ◽  
Si Solar Cells ◽  
Current Voltage ◽  
Inorganic Substrates ◽  
Uv Range

We study the optical and electrical losses in PEDOT:PSS/n-Si solar cells using spectroscopic ellipsometry and current-voltage measurements. The optical constants and thickness of the PEDOT:PSS films were studied using spectroscopic ellipsometry performed by a SE-2000 SEMILAB ellipsometer spanning the NIR–VIS–UV range with a resolution of 5 nm. The results were analyzed using a four-layer model involving the ntype silicon (001) substrate, interfacial layer between Si and polymer films, PEDOT:PSS thin film, and a surface roughness layer. The key to understand the origin of the losses is that the studied junctions have an interfacial layer between organic (PEDOT:PSS) and inorganic substrates. The dielectric functions of the PEDOT:PSS were fitted with the known thickness and the assumption of a negligible roughness (i.e. that the roughness is much smaller than the wavelength). Using the complex dielectric function, the optical constants (refractive index n and extinction coefficient k) were calculated. In addition to real and imaginary part of the refractive index, the absorption coefficient was calculated. The produced hybrid solar cells show efficiencies around 7%.

scholarly journals Low-refractive-index nanoparticle interlayers to reduce parasitic absorption in metallic rear reflectors of solar cells

2017 ◽  
Vol 214 (10) ◽  
pp. 1700179 ◽  
Author(s):  
Mathieu Boccard ◽  
Peter Firth ◽  
Zhengshan J. Yu ◽  
Kathryn C. Fisher ◽  
Mehdi Leilaeioun ◽  
...  
Keyword(s):  
Refractive Index ◽  
Solar Cells ◽  
Low Refractive Index
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