scholarly journals Triangular metallic gratings for large absorption enhancement in thin film Si solar cells

2012 ◽  
Vol 20 (9) ◽  
pp. 9458 ◽  
Author(s):  
Enes Battal ◽  
Taha Alper Yogurt ◽  
Levent Erdal Aygun ◽  
Ali K. Okyay
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Absorption Enhancement ◽  
Si Solar Cells ◽  
Metallic Gratings

Double AAO nanogratings for broad spectrum absorption enhancement in thin film Si solar cells

2015 ◽  
Vol 75 ◽  
pp. 93-98 ◽  
Author(s):  
F.F. Qin ◽  
H.M. Zhang ◽  
C.X. Wang ◽  
J.J. Zhang ◽  
C. Guo
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Broad Spectrum ◽  
Absorption Enhancement ◽  
Si Solar Cells

Realization of Significant Absorption Enhancement in Thin Film Silicon Solar Cells with Textured Photonic Crystal Backside Reflector

2008 ◽  
Vol 1123 ◽  
Author(s):  
Lirong Zeng ◽  
Peter Bermel ◽  
Yasha Yi ◽  
Bernard A. Alamariu ◽  
Kurt A. Broderick ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Near Infrared ◽  
Light Trapping ◽  
Short Circuit ◽  
Large Angle ◽  
Bragg Reflector ◽  
Absorption Enhancement ◽  
Si Solar Cells

AbstractThe major factor limiting the efficiencies of thin film Si solar cells is their weak absorption of red and near-infrared photons due to short optical path length and indirect bandgap. Powerful light trapping is essential to confine light inside the cell for sufficient absorption. Here we report the first experimental application of a new light trapping scheme, the textured photonic crystal (TPC) backside reflector, to monocrystalline thin film Si solar cells. TPC combines a onedimensional photonic crystal, i.e., a distributed Bragg reflector (DBR), with a reflection grating. The near unity reflectivity of DBR in a wide omnidirectional bandgap and the large angle diffraction by the grating ensures a strong enhancement in the absorption of red and near-infrared photons, leading to significant improvements in cell efficiencies. Measured short circuit current density Jsc was increased by 19% for 5 μm thick cells, and 11% for 20 μm thick cells, compared to theoretical predictions of 28% and 14%, respectively.

Broadband Absorption Enhancement in Thin Film Solar Cells Using Inverse Optimization of Light Trapping Mechanisms

2012 ◽  
Author(s):  
Shima Hajimirza ◽  
Alex Heltzel ◽  
John Howell
Keyword(s):  
Thin Film ◽  
Absorption Spectrum ◽  
Solar Cells ◽  
Indium Tin Oxide ◽  
Rear Surface ◽  
Front Surface ◽  
Optimization Techniques ◽  
Absorption Enhancement ◽  
Back Surface ◽  
Metallic Gratings

In this paper, global optimization techniques are used to design broadband solar absorption enhancement in thin film amorphous silicon (a-Si) solar cells, using periodic nanostructures on the top and bottom surfaces of the cell. Considering a combination of silver rectangular gratings and indium tin oxide (ITO) coatings on both surfaces of the a-Si, numerical optimization techniques such as Simulated Annealing and a local constrained Quasi-Newton algorithm are used to optimize the surface texture patterns. Numerical results indicate that, unlike the case of metallic gratings on the front surface, a periodic silver grating structure on the back surface results in a modification of the absorption spectrum largely independent of the effect of anti-reflection ITO coatings on the front of the cell. Furthermore, additional improvement can be obtained by using a thin rear surface ITO layers. Therefore, using a combination of metallic gratings and ITO coatings on both sides, a wideband absorption spectrum enhancement is achievable. Simulations predict integrated enhancement factors as high as 2.0 (100% improvement) for the case of metallic grating on the back surface and ITO layers on the front, and as high as 2.2 (120% improvement) when a combination of grating and ITO coatings on both sides is used. Such noteworthy improvements are made possible by efficient multi-parameter optimization supplanting an intractable exhaustive search.

Absorption enhancement in thin film a-Si solar cells with double-sided SiO 2 particle layers

2015 ◽  
Vol 24 (10) ◽  
pp. 104201 ◽  
Author(s):  
Le Chen ◽  
Qing-Kang Wang ◽  
Xiang-Qian Shen ◽  
Wen Chen ◽  
Kun Huang ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Absorption Enhancement ◽  
Si Solar Cells
Sign in / Sign up

Export Citation Format

Share Document