Light management for reduction of bus bar and gridline shadowing in photovoltaic modules

@article{Jaus2010LightMF,
  title={Light management for reduction of bus bar and gridline shadowing in photovoltaic modules},
  author={Joachim Jaus and Henrikki Pantsar and Johannes Eckert and Matthias Duell and Hans Herfurth and Dan M. J. Doble},
  journal={2010 35th IEEE Photovoltaic Specialists Conference},
  year={2010},
  pages={000979-000983}
}
Solar cells used in photovoltaic (PV) crystalline silicon modules commonly feature grid fingers and bus bars as front contacts. The grid fingers and bus bars partially block the sunlight from reaching the semiconductor layers of a solar cell and therefore reduce the efficiency of a solar module. In this paper, we present experimental results of different technologies to reduce the shadowing effect that bus bars and grid fingers impose. We focus on two technologies that can be easily integrated… 

Figures and Tables from this paper

Approaches to improving energy yield from PV modules
PV modules were fabricated that incorporated various methods to increase the amount of light which is ultimately transmitted to the solar cell in order to improve energy yield. The techniques
Reducing shadowing losses in silicon solar cells using cellulose nanocrystal: polymer hybrid diffusers.
TLDR
Simulations showed that the CNP diffuser is an excellent candidate for reducingshadowing losses within a wide range of incident angles, as it can reduce more than 30% of shadowing losses at normal incidence, and nearly 50% of the lost light can be recycled at the incident angle of 60°.
Impact of Angular Irradiation Profiles on Performance of Silicon PV Modules Using Light Scattering Films
Light trapping strategies, such as light scattering films (LSFs) present an opportunity to increase the power generated by Si photovoltaic modules. Evaluation of the benefits of these strategies for
Crystalline Silicon PV Module Technology
TLDR
The chapter discusses efficiency loss and gain mechanisms from cell to module, typically totaling 10–15%.
Impact of angular irradiance distributions on coupling gains and energy yield of cell interconnection designs in silicon solar modules in tracking and fixed systems
Cell interconnector designs such as light redirecting films (LRFs) and various geometric ribbon layouts are all aimed at improving the performance of crystalline silicon solar modules. However, due
Diffractive optical elements utilized for efficiency enhancement of photovoltaic modules 1-1-2011
Commonsolar cells used in photovoltaic modules feature metallic contacts which partially block the sunlight from reaching the semiconductor layer and reduce the overall efficiency of the modules.
Colored Ribbons Achieve +0.28%$_{\bf abs.}$ Efficiency Gain
Flat metallic ribbons connect the solar cells in conventional crystalline silicon modules. Acting like a mirror, they reflect incoming radiation out of the module. The area covered by the ribbons
Review: Surface Texturing Methods for Solar Cell Efficiency Enhancement
Demand for renewable energy continually increases due to environmental pollution and resource depletion caused by the increased use of fossil fuels. Among the various renewable energies, the solar
Reducing shadowing losses with femtosecond‐laser‐written deflective optical elements in the bulk of EVA encapsulation
A new approach on decreasing the optical shadowing of the solar cell grid fingers is presented. The approach relies on a local change of the optical properties in the bulk of the photovoltaic module
Microfiber Optic Arrays as Top Coatings for Front Contact Solar Cells Towards Mitigation of Shading Loss.
TLDR
A new approach for enhanced light collection and conversion using a scalable, straightforward light-based additive manufacturing process that increases external quantum efficiency and increases in short circuit current density.
...
1
2
...

References

SHOWING 1-4 OF 4 REFERENCES
A simple ray tracer to compute the optical concentration of photovoltaic modules
In a conventional photovoltaic module, some light that falls between the solar cells is internally reflected onto the cells via the backsheet and the glass–air interface of the module; thus, a module
Concentration of solar radiation by white painted transparent plates.
TLDR
The concentrator has the advantage over other systems in that the concentration is independent of incidence angle and the concentrator is easy to produce, and it needs no tracking system and will concentrate on a cloudy day.
Commercial white paint as back surface reflector for thin-film solar cells
Abstract In this work, commercially available white paint is applied as a pigmented diffuse reflector (PDR) on the rear surface of thin-film crystalline silicon (c-Si) solar cells with a silicon
Light trapping in Silicon-Film™ solar cells with rear pigmented dielectric reflectors
This paper presents the novel method of using pigmented dielectric reflectors to provide light trapping in thin-film silicon solar cells. This type of reflecting material offers many potential