Thin Evaporated Calcium Fluoride Films

Bannon, J.; Coogan, C. K.

doi:10.1038/163062c0

Cited by 7 publications

(1 citation statement)

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“…Figure 1b. It shows that the CaF2 film is polycrystalline and has a strongest peak of 111, which is in good agreement with the Bannon and Coogan result [26]. The subsequent diffraction lines at 49.6 and 55.6 were identified as 220 and 311 reflexes of the CaF2 phase, respectively [27].…”

Section: Structure Characterizationsupporting

confidence: 88%

Optical Properties of CaF2 Thin Film Deposited on Borosilicate Glass and Its Electrical Performance in PV Module Applications

et al. 2020

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Calcium fluoride (CaF2) is deposited via vacuum thermal evaporation on borosilicate glass to produce an anti-reflection coating for use in solar modules. Macleod’s essential simulation is used to optimize the thickness of the CaF2 coating on the glass. Experimentally, a 120 ± 4 nm-thin CaF2 film on glass shows an average increase of ~4% in transmittance and a decrease of ~3.2% in reflectance, respectively, when compared to that of uncoated glass (Un CG), within the wavelength spectrum of approximately 350 to 1100 nm. The electrical PV performance of CaF2-coated glass (CaF2-CG) was analyzed for conventional and lightweight photovoltaic module applications. An improvement in the short-circuit current (Jsc) from 38.13 to 39.07 mA/cm2 and an increase of 2.40% in the efficiency (η) was obtained when CaF2-CG glass was used instead of Un CG in a conventional module. Furthermore, Jsc enhancement from 35.63 to 36.44 mA/cm2 and η improvement of 2.32% was observed when a very thin CaF2-CG was placed between the polymethyl methacrylate (PMMA) and solar cell in a lightweight module.

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Section: Structure Characterizationsupporting

confidence: 88%