A facile approach to determine the unknown refractive index (n) and extinction coefficient (k) of novel encapsulant materials used in back contact PV modules

Shamim, A.; Noman, Muhammad; Zubair, Muhammad; Khan, Adnan Daud; Saher, Saim

doi:10.1007/s00339-018-1974-x

Cited by 8 publications

(1 citation statement)

References 27 publications

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“…As this research includes the use of two non-conventional encapsulant materials (TPO and polybutadiene ionomer), it is necessary to find out extinction coefficient (k) and refractive index (n) first, as the required simulation data of non-conventional materials are not available in the software. The k and n are calculated using MATLAB, a custom method explained in [25], which requires the reflectance (R m ) and transmittance (T m ) values from spectrophotometer. In this method, R m and T m of both TPO and ionomer measured through spectrophotometer subsume in Equations (2) and (3) are simultaneously solved using MATLAB code to get sample interface reflection (R) and fraction of light absorbed per pass (A).…”

Section: Experimental Methodologymentioning

confidence: 99%

Reflection Losses Analysis from Interspacing between the Cells in a Photovoltaic Module Using Novel Encapsulant Materials and Backsheets

2019

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Higher efficiency and output power of a photovoltaic (PV) module can be achieved by minimizing cell-to-module (CTM) power losses. CTM losses are mainly dependent on electrical and optical losses. In this work, reflection losses from interspacing of cells with respect to different encapsulant materials and backsheets are evaluated. Two novel encapsulant materials thermoplastic polyolefin (TPO) and polybutadiene ionomer are used, in addition to conventionally used ethylene vinyl acetate (EVA). Moreover, the effect of using these encapsulant materials separately with Tedlar and Aluminum foil as backsheets is realized. It has been observed that TPO in combination with Tedlar presents minimum reflection losses compared to other encapsulant materials. The reflection losses calculated experimentally with polybutadiene ionomer were 5.4% less than the conventionally used EVA, whereas, the reflection losses calculated experimentally with TPO were 5.9% less than the conventionally used EVA. The experimental results obtained are also validated through simulations.

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Section: Experimental Methodologymentioning

confidence: 99%