Performance and life prediction model for photovoltaic modules: Effect of encapsulant constitutive behavior

Hasan, Osama; Arif, Abul Fazal M.

doi:10.1016/j.solmat.2013.11.016

Cited by 69 publications

(32 citation statements)

References 28 publications

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“…Therefore to ensure long term stability, the modules were encapsulated in PDMS prior to testing. PDMS has been used in polycrystalline silicon PVs as an alternative to EVA and it only weakly affects UV light transmission from 400nm to 280nm [18] Therefore, the encapsulant does not significantly filter the UV components of incident sunlight, enabling the effectiveness of the LDS layer to be evaluated, whilst preventing oxygen and water ingress. A comparison of three configurations was undertaken, as shown in figure 2(e): (i) a control module without a UV filter, (ii) a module with a commercially available UV blocking layer from Solaronix SA (part number 49132) and (iii) a module with the Eu:PMMA LDS layer (printed on PET as described above).…”

Section: Module (16-cell) Fabrication and Outdoor Stability Measurementsmentioning

confidence: 99%

Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

Kettle

Bristow

Gethin

et al. 2016

Solar Energy Materials and Solar Cells

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The proof of concept of using luminescent down shifting (LDS) layers as alternative UV filters for P3HT:PCBM OPVs is demonstrated using a lanthanide-based metal complex. The results are verified using a combination of indoor light soaking, with single cell devices, and outdoor performance monitoring, using a 16-cell monolithically connected OPV module. By applying the LDS layer, a ~5% relative enhancement in photocurrent is observed for both sets of devices. More significantly, indoor light soaking tests on single cell devices without encapsulation showed an 850% enhancement in the measured half-life (T50%). The OPV modules were encapsulated and tested for outdoor stability over a 70 day period in the Negev desert, Israel . The modules made with the LDS filter are shown to match the stability of those made with a commercial UV filter and outperform the modules with no filter applied, with a 51% enhancement in the measured stability (T75%). Significantly, the work provides clear experimental evidence that the LDS layer can act as a UV filter in OPVs without compromising the efficiency of the solar cell, thus providing an added benefit over commercial UV filters.

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Section: Module (16-cell) Fabrication and Outdoor Stability Measurementsmentioning

confidence: 99%

Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

Kettle

Bristow

Gethin

et al. 2016

Solar Energy Materials and Solar Cells

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“…18 Higher WVTR of polymeric backsheet causes the moisture and oxygen to enter traditional modules and accelerate the aging of EVA and produce acetic acid. Encapsulants with high WVTR are the reason for corrosion of the solder bonds and copper interconnects.…”

Section: Long-term Multiple Stress Sequentialmentioning

confidence: 99%

Long-term reliability of silicon wafer-based traditional backsheet modules and double glass modules

Zhang

Xu²,

Mao³

et al. 2015

RSC Adv.

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An extensive program of series extended sequential long-term reliability stress including thermal cycling (TC) 600, damp heat (DH) 3000, 600 hours potential induced degradation (PID) and humidity freeze (HF) 50 were performed on silicon wafer-based traditional backsheet modules and double glass photovoltaic (PV) modules. The relative module maximum power (P max ) degradations of traditional backsheet modules are 3.87%, 7.34%, 13.3%, 33.73% and those of double glass modules are 2.78%, 3.12%, 2.27%, 2.72%, respectively. From all the above results, HF50 has a greater impact on P max degradation of traditional backsheet modules, and a strong correlation is thereby found between the Water Vapor Transmission Rate (WVTR) of the backsheet and the P max degradation. Traditional backsheet modules have higher WVTR and greater P max degradation, while double glass modules are impermeable and have much lower P max degradation. The key factor for excellent performance of Si wafer-based double glass PV modules is replacing the polymer backsheet by a glass panel with impermeability to water vapor, which enables double glass modules to offer much higher reliability and longer durability.

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“…Moreover, EVA provides protection of cells and interconnections from moisture, foreign impurities, and mechanical damage. The provision of such properties makes it a vital component on which the performance of a PV module depends [3].…”

Section: Introductionmentioning

confidence: 99%

An Accurate Thermoviscoelastic Rheological Model for Ethylene Vinyl Acetate Based on Fractional Calculus

Paggi

Sapora

2015

International Journal of Photoenergy

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The thermoviscoelastic rheological properties of ethylene vinyl acetate (EVA) used to embed solar cells have to be accurately described to assess the deformation and the stress state of photovoltaic (PV) modules and their durability. In the present work, considering the stress as dependent on a noninteger derivative of the strain, a two-parameter model is proposed to approximate the power-law relation between the relaxation modulus and time for a given temperature level. Experimental validation with EVA uniaxial relaxation data at different constant temperatures proves the great advantage of the proposed approach over classical rheological models based on exponential solutions.

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Performance and life prediction model for photovoltaic modules: Effect of encapsulant constitutive behavior

Cited by 69 publications

References 28 publications

Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

Long-term reliability of silicon wafer-based traditional backsheet modules and double glass modules

An Accurate Thermoviscoelastic Rheological Model for Ethylene Vinyl Acetate Based on Fractional Calculus

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