Formation of periodic structures on silicon by laser beam interference ablation technique for light control in solar cells

2014 ◽  
Author(s):  
B. Voisiat ◽  
S. Indrišiūnas ◽  
R. Suzanovičienė ◽  
I. Šimkienė ◽  
G. Račiukaitis
Keyword(s):  
Solar Cells ◽  
Laser Beam ◽  
Periodic Structures ◽  
Light Control ◽  
Ablation Technique

Subwavelength Periodic Structures Design and its Role in Photon Control of Thin Film Solar Cells

NANO ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. 2050139
Author(s):  
Zhiye Wang ◽  
Xiangqian Shen ◽  
Shuying Wang ◽  
Hua Zhou ◽  
Peihua Wangyang ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Periodic Structures ◽  
Spectral Response ◽  
Incident Light ◽  
Optical Loss ◽  
Thin Film Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Optimized Design ◽  
Photoelectric Conversion

A subtle modification of the device surface is able to reduce optical loss and to further achieve high photoelectric conversion efficiency for thin film solar cells. This work shows the manipulation properties of subwavelength periodic structures on incident light at air/glass surface. In order to explore the mechanisms of optical loss, the spectral response and energy distribution of light are investigated by using rigorous coupled wave analysis and finite difference time domain methods. Calculation results show that the diffraction scattering and gradient refraction index play a significant role for better photon harvesting. With an optimized design of [Formula: see text][Formula: see text]nm, [Formula: see text], and hemispherical shape structure, obvious improvement in transmittance, external quantum efficiency and photo-generated current is achieved. The photoelectric conversion efficiencies of amorphous silicon thin film cells with an absorbing layer thickness of 400[Formula: see text]nm is 8.04%, improved by 5.9% compared with the flat cell of equivalent size.

scholarly journals Formation and applications of periodic structures in transparent materials induced by single fs laser beam

2013 ◽  
Vol 3 (11) ◽  
pp. 1944 ◽  
Author(s):  
Fangteng Zhang ◽  
Yu Teng ◽  
Yongze Yu ◽  
Kaniyarakkal N. Sharafudeen ◽  
Kazuyuki Hirao ◽  
...  
Keyword(s):  
Laser Beam ◽  
Periodic Structures ◽  
Fs Laser ◽  
Transparent Materials

Quantitative Defect Analysis on Solar Cells by Laser Beam Induced Current (LBIC) Measurements and 3D Network Simulations

2013 ◽  
Vol 1493 ◽  
pp. 195-200 ◽  
Author(s):  
Minh Nguyen ◽  
Andreas Schütt ◽  
Jürgen Carstensen ◽  
Helmut Föll
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Laser Beam ◽  
Equivalent Circuit Model ◽  
Adjacent Area ◽  
Local Defect ◽  
Current Response ◽  
Induced Current ◽  
Shunt Resistance ◽  
3D Network

ABSTRACTMeasurements with the CELLO (solar cell local characterization) technique in the LBIC (laser beam induced current) mode under dark conditions with various constant bias voltages are used to analyze the lateral distribution, and mean values, of photocurrent response maps. Local solar cell defects such as local shunts were found to have a characteristic bias voltage dependence: At negative and small positive voltages a local shunt resistance gives less current response than the adjacent area. Upon applying higher positive voltages, a transition of the mean value to lower current response and an inversion of the local defect characteristics are found. These results were modeled by a newly introduced three dimensional (3D) equivalent circuit model of a solar cell divided into subcells.Measurements and simulations of solar cells with various local defects show our method to be a new powerful tool for the quantitative analysis of local solar cell defects.

scholarly journals Disorder Improves Light Absorption in Thin Film Silicon Solar Cells with Hybrid Light Trapping Structure

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yanpeng Shi ◽  
Xiaodong Wang ◽  
Fuhua Yang
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Periodic Structures ◽  
Light Trapping ◽  
Random Effect ◽  
Large Field ◽  
Silicon Solar Cells ◽  
Trapping Effect ◽  
Thin Film Silicon ◽  
The Impact

We present a systematic simulation study on the impact of disorder in thin film silicon solar cells with hybrid light trapping structure. For the periodical structures introducing certain randomness in some parameters, the nanophotonic light trapping effect is demonstrated to be superior to their periodic counterparts. The nanophotonic light trapping effect can be associated with the increased modes induced by the structural disorders. Our study is a systematic proof that certain disorder is conceptually an advantage for nanophotonic light trapping concepts in thin film solar cells. The result is relevant to the large field of research on nanophotonic light trapping which currently investigates and prototypes a number of new concepts including disordered periodic and quasiperiodic textures. The random effect on the shape of the pattern (position, height, and radius) investigated in this paper could be a good approach to estimate the influence of experimental inaccuracies for periodic or quasi-periodic structures.

Periodic Structures for Improved Light Management in Thin-film Silicon Solar Cells

2008 ◽  
Vol 1101 ◽  
Author(s):  
Janez Krc ◽  
Andrej Campa ◽  
Stefan L. Luxembourg ◽  
Miro Zeman ◽  
Marko Topic
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Photonic Crystal ◽  
Amorphous Silicon ◽  
Periodic Structures ◽  
Light Trapping ◽  
Silicon Solar Cells ◽  
Thin Film Silicon ◽  
Light Management

AbstractAdvanced light management in thin-film solar cells is important in order to improve the photo-current and, thus, to raise up the conversion efficiencies of the solar cells. In this article two types of periodic structures ¡V one-dimensional diffraction gratings and photonic crystals,are analyzed in the direction of showing their potential for improved light trapping in thin-film silicon solar cells. The anti-reflective effects and enhanced scattering at the gratings with the triangular and rectangular features are studied by means of two-dimensional optical simulations. Simulations of the complete microcrystalline solar cell incorporating the gratings at all interfaces are presented. Critical optical issues to be overcome for achieving the performances of the cells with the optimized randomly textured interfaces are pointed out. Reflectance measurements for the designed 12 layer photonic crystal stack consisting of amorphous silicon nitride and amorphous silicon layers are presented and compared with the simulations. High reflectance (up to 99 %) of the stack is measured for a broad wavelength spectrum. By means of optical simulations the potential for using a simple photonic crystal structure as a back reflector in an amorphous silicon solar cell is demonstrated.

scholarly journals Periodic textures for enhanced current in thin film silicon solar cells

2008 ◽  
Vol 1101 ◽  
Author(s):  
Franz-Josef Haug ◽  
Thomas Söderström ◽  
Oscar Cubero ◽  
Vanessa Terrazzoni-Daudrix ◽  
Xavier Niquille ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Periodic Structures ◽  
Plastic Substrate ◽  
Silicon Solar Cells ◽  
Sinusoidal Grating ◽  
Thin Film Silicon ◽  
Wide Range ◽  
The Individual ◽  
High Degree

AbstractFor thin film silicon solar cells it is vital to increase the optical path of light in the absorber because this allows for thinner cells with better stability and higher production throughput. We discuss the effect of periodically textured interfaces for the case of thin film silicon solar cells in n-i-p configuration using embossed plastic substrate which allows us studying the effect of a wide range of random or periodic textures. Due to the moderate thickness of the individual layers the texture is carried into each interface with a high degree of conformity even for the front contact which is the last layer. Solar cells on periodic structures show excellent performance; in a microcrystalline cell on a simple sinusoidal grating we achieved a gain in current density of 30%. Furthermore, the periodicity serves as a useful tool for the study of light management because the underlying phenomena like diffraction or grating coupling to plasma excitations of the metallic back reflector are governed by a relatively low number of well defined parameters like the periodicity and the amplitude of the grating.

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