Optical Constants of UV Transparent EVA and the Impact on the PV Module Output Power under Realistic Irradiation

Vogt, Malte R.; Holst, Hendrik; Schulte‐Huxel, Henning; Blankemeyer, Susanne; Witteck, Robert; Hinken, David; Winter, Matthias; Min, Byungsul; Schinke, Carsten; Ahrens, Ingo; Köntges, Marc; Bothe, Karsten; Brendel, Rolf

doi:10.1016/j.egypro.2016.07.136

Cited by 66 publications

(49 citation statements)

References 13 publications

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“…Although the encapsulation film shows some optical gain due to internal reflection of scattered light from the surface of the textured solar cells, it causes a large amount of optical loss by cutting off short wavelength light. Furthermore, by absorption of high energy short wavelength light, it suffers from a browning effect during long operation periods . In addition, the flat panel structures are only designed for standard characterization conditions, which do not fully reflect actual operation conditions, especially when they are used in urban applications.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, by absorption of high energy short wavelength light, it suffers from a browning effect during long operation periods. 17,18,[25][26][27][28][29][30][31] In addition, the flat panel structures are only designed for standard characterization conditions, which do not fully reflect actual operation conditions, especially when they are used in urban applications. We suggest a new concept to overcome these limitations.…”

Section: Introductionmentioning

confidence: 99%

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Finding 10% hidden electricity in crystalline Si solar cells using PDMS coating and three‐dimensional cell arrays

Yun

Sim

Seung

et al. 2020

Progress in Photovoltaics

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Over the decades, solar cells have been developed to achieve higher energy conversion efficiency. However, the fabrication of modules has resulted in electricity production loss, but this has not attracted as much attention as the solar cells. As a result, the improved performance of solar cells has not been fully revealed at the panel scale. Furthermore, the standard testing conditions, such as 1 sun, AM1.5, which is very strong incident light, does not fully reflect the electricity production capabilities of solar panels because of performance degradation under oblique and weak illumination. Simple modification of the module fabrication process, including poly‐dimethylsiloxane (PDMS) coatings and three‐dimensional (3‐D) structured modules by one‐directional angled arrays of each cell, has revealed 13.4% extra hidden electricity in solar panels with some types of crystalline silicon (Si)‐based solar cells through high transmission to short wavelength light, recapture of the light reflected from Si solar cell surface textures by the PDMS coating and enhanced power production under oblique incident light or scattered light through a 3‐D module. Further studies to find hidden electricity should be followed by the development of solar cell device structures to improve electricity production, rather than being restricted to optimizing energy conversion efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finding 10% hidden electricity in crystalline Si solar cells using PDMS coating and three‐dimensional cell arrays

Yun

Sim

Seung

et al. 2020

Progress in Photovoltaics

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“…In our model, thin layers follow the applied wafer textures. The complex refractive indices of the layers used as input for optical simulations were taken from the PV Lighthouse database [32] and correspond to measurements of realistic layers [18,33–35]. …”

Section: Introductionmentioning

confidence: 99%

Performance analysis of rigorous coupled-wave analysis and its integration in a coupled modeling approach for optical simulation of complete heterojunction silicon solar cells

Lokar

Lipovšek

Topič

et al. 2018

Beilstein J. Nanotechnol.

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A variety of light management structures have been introduced in solar cells to improve light harvesting and further boost their conversion efficiency. Reliable and accurate simulation tools are required to design and optimize the individual structures and complete devices. In the first part of this paper, we analyze the performance of rigorous coupled-wave analysis (RCWA) for accurate three-dimensional optical simulation of solar cells, in particular heterojunction silicon (HJ Si) solar cells. The structure of HJ Si solar cells consists of thin and thick layers, and additionally, micro- and nano-textures are also introduced to further exploit the potential of light trapping. The RCWA was tested on the front substructure of the solar cell, including the texture, thin passivation and contact layers. Inverted pyramidal textures of different sizes were included in the simulations. The simulations rapidly converge as long as the textures are small (in the (sub)micrometer range), while for larger microscale textures (feature sizes of a few micrometers), this is not the case. Small textures were optimized to decrease the reflectance, and consequently, increase the absorption in the active layers of the solar cell. Decreasing the flat parts of the texture was shown to improve performance. For simulations of structures with microtextures, and for simulations of complete HJ Si cells, we propose a coupled modeling approach (CMA), where the RCWA is coupled with raytracing and the transfer matrix method. By means of CMA and nanotexture optimization, we show the possible benefits of nanotextures at the front interface of HJ Si solar cells, demonstrating a 13.4% improvement in the short-circuit current density with respect to the flat cell and 1.4% with respect to the cell with double-sided random micropyramids. We additionally demonstrate the ability to simulate a combination of nano- and microtextures at a single interface, although the considered structure did not show an improvement over the pyramidal textures.

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“…Light reflection from a metal film laminated in the PV module is analyzed using a multilayer model with normal incidence. The module is expressed as a stack of air (refractive index n = 1), EVA (450 µm in thickness 24) ), a metal thin film (tin 25) or gold 26) ), and a PV cell (Si 27) ). The effects of the cover glass, tin tetraacetate, and glass substrate are ignored.…”

Section: Principle Of Measurementmentioning

confidence: 99%

Detection of acetic acid produced in photovoltaic modules based on tin film corrosion during damp heat test

Hamaoka

Iwami

Itayama

et al. 2018

Jpn. J. Appl. Phys.

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A novel, nondestructive low-cost detection method for acetic acid distribution in a photovoltaic (PV) module during the damp heat (DH) test based on reflectance changes of tin film sensors is proposed and demonstrated. The sensor consists of a tin film evaporated on a glass substrate. Nineteen sensors and one gold film are laminated in the PV module, and the DH test was performed at 85°C and 85% relative humidity for 7203 h. The time range of measurement can be controlled between 2000 to 6000 h by adjusting the tin film initial thickness from 70 to 160 nm.

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Optical Constants of UV Transparent EVA and the Impact on the PV Module Output Power under Realistic Irradiation

Cited by 66 publications

References 13 publications

Finding 10% hidden electricity in crystalline Si solar cells using PDMS coating and three‐dimensional cell arrays

Finding 10% hidden electricity in crystalline Si solar cells using PDMS coating and three‐dimensional cell arrays

Performance analysis of rigorous coupled-wave analysis and its integration in a coupled modeling approach for optical simulation of complete heterojunction silicon solar cells

Detection of acetic acid produced in photovoltaic modules based on tin film corrosion during damp heat test

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