Development of n-μc-SiOx:H as cost effective back reflector and its application to thin film amorphous silicon solar cells

Solar Energy ◽  
2013 ◽  
Vol 97 ◽  
pp. 591-595 ◽  
Author(s):  
C. Banerjee ◽  
T. Srikanth ◽  
U. Basavaraju ◽  
R.M. Tomy ◽  
M.G. Sreenivasan ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Amorphous Silicon ◽  
Cost Effective ◽  
Silicon Solar Cells ◽  
Back Reflector

Novel approaches of light management in thin-film silicon solar cells

2006 ◽  
Vol 910 ◽  
Author(s):  
Janez Krc ◽  
M. Zeman ◽  
A. Campa ◽  
F. Smole ◽  
M. Topic
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Photonic Crystal ◽  
Amorphous Silicon ◽  
Wavelength Region ◽  
Silicon Solar Cells ◽  
Novel Approaches ◽  
Back Reflector ◽  
High Reflectance

AbstractIn order to improve light trapping in thin-film silicon solar cells two novel approaches are investigated in this article: angle-selective management of light scattering inside the solar cell and wavelength-selective manipulation of high reflectance or transmittance of light. Diffraction gratings are analyzed as a representative of the first approach. Haze and angular distribution function of scattered (diffracted) light in reflection are measured for aluminum-based rectangular periodic gratings with different period and height of the rectangles. High haze values in specific wavelength region and scattering angles of the investigated gratings measured in air and water agree very well with the theoretical predictions. Considering the actual optical situation in microcrystalline silicon solar cells, optimal period and height of the rectangular gratings applied as a back reflector are calculated for obtaining the total reflection at the front interfaces. In the frame of the second approach, photonic-crystal-like structures are introduced. By means of optical simulations photonic-crystal-like structures are investigated for two possible applications: an intermediate reflector in a micromorph silicon solar cell with wavelength-selective reflectivity and a dielectric back reflector with a high reflectance in the long-wavelength region. The photonic crystal structure consisting of sequences of n-doped amorphous silicon and ZnO layers is designed for the efficient intermediate reflector. For the back reflector with a high reflectance the structures with intrinsic amorphous silicon, SiO2, MgF2 and TiO2 are proposed.

Enhanced Absorption in Amorphous Silicon Solar Cells Using Plasmonic and Photonic Crystals – Measurement and Simulation

2010 ◽  
Vol 1248 ◽  
Author(s):  
Benjamin Curtin ◽  
Rana Biswas ◽  
Vikram Dalal
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Amorphous Silicon ◽  
Near Infrared ◽  
Silicon Solar Cells ◽  
Back Reflectors ◽  
Back Reflector ◽  
Hole Arrays

AbstractWe develop experimentally and theoretically plasmonic and photonic crystals for enhancing thin film silicon solar cells. Thin film amorphous silicon (a-Si:H) solar cells suffer from decreased absorption of red and near-infrared photons, where the photon absorption length is large. Simulations predict maximal light absorption for a pitch of 700-800 nm for photonic crystal hole arrays in silver or ZnO/Ag back reflectors, with absorption increases of ~12%. The photonic crystal improves over the ideal randomly roughened back reflector (or the ‘4n2limit’) at wavelengths near the band edge. We fabricated metallic photonic crystal back-reflectors using photolithography and reactive-ion etching. We conformally deposited a-Si:H solar cells on triangular lattice hole arrays of pitch 760 nm on silver back-reflectors. Electron microscopy demonstrates excellent long range periodicity and conformal a-Si:H growth. The measured quantum efficiency increases by 7-8 %, relative to a flat reflector reference device, with enhancement factors exceeding 6 at near-infrared wavelengths. The photonic crystal back reflector strongly diffracts light and increases optical path lengths of solar photons.

Enhanced efficiency of hybrid amorphous silicon solar cells based on single-walled carbon nanotubes and polymer composite thin film

2018 ◽  
Vol 29 (10) ◽  
pp. 105404 ◽  
Author(s):  
Pramod M Rajanna ◽  
Evgenia P Gilshteyn ◽  
Timur Yagafarov ◽  
Alena K Aleekseeva ◽  
Anton S Anisimov ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Solar Cells ◽  
Amorphous Silicon ◽  
Polymer Composite ◽  
Single Walled Carbon Nanotubes ◽  
Composite Thin Film ◽  
Silicon Solar Cells ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Light Propagation in Flexible Thin-Film Amorphous Silicon Solar Cells with Nanotextured Metal Back Reflectors

2020 ◽  
Vol 12 (23) ◽  
pp. 26184-26192 ◽  
Author(s):  
Shuangying Cao ◽  
Dongliang Yu ◽  
Yinyue Lin ◽  
Chi Zhang ◽  
Linfeng Lu ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Amorphous Silicon ◽  
Light Propagation ◽  
Silicon Solar Cells ◽  
Back Reflectors ◽  
Metal Back

Hydrogen Treatment of Undoped Zno Thin Film Using Photo-Chemical Vapor Deposition

1996 ◽  
Vol 426 ◽  
Author(s):  
Seung Jae Baik ◽  
Jinsoo Song ◽  
Koeng Su Lim
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Chemical Vapor Deposition ◽  
Amorphous Silicon ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Silicon Solar Cells ◽  
Hydrogen Treatment ◽  
Zno Thin Film ◽  
Hydrogen Molecules

AbstractTo obtain high quality ZnO thin films for use as transparent electrodes of amorphous silicon solar cells, hydrogen treatment of the films using photo-chemical vapor deposition was performed for the first time. The as-deposited ZnO thin film was irradiated by UV light during the flow of hydrogen molecules in the presence of photo-sensitizers of mercury. As the treatment time increased, resistivity decreased from 1 × 10−2Ωcm to 2 × 10−3Ωcm. Moreover, haze ratio increased from 20% to 48%. Hydrogen radicals were thought to be playing various roles on the neighborhood of the surface region and the grain boundary region. This new trial gave us new understanding into the relation between hydrogen and ZnO. Moreover, these results could be applied to the process of amorphous silicon solar cells and a possible increase of efficiency is expected.

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