Abstract
Luminescent beads composed of Eu(hfa)3(TPPO)2 (hfa: hexafluoroacetylacetonate, TPPO: triphenylphosphine oxide) in PMMA copolymer (polymethylmethacrylate- styrene and polymethylmethacrylate–trifluoromethylmethacrylate copolymers), PMMA–St–Eu and PMMA–TF–Eu have been reported for improvement of energy conversion efficiency on silicon solar cell. The PMMA–St–Eu and PMMA–TF–Eu beads are prepared using radical initiator AIBN (2,2-azobisisobutyronitrile) without BPO (Benzoyl peroxide) which promotes decomposition of Eu(hfa)3(TPPO)2. The emission properties of EVA (ethylene vinyl acetate) film with PMMA–St–Eu or PMMA–TF–Eu beads are characterized by the emission spectra and lifetimes. Thermo- and moisture-stabilities of the EVA films are performed under high temperature and high moisture condition (85°C85%RH). Increase percentage the solar cell short circuit current efficiency in the solar cell modulation using with EVA film containing PMMA–St–Eu beads with size in 70μm was estimated to 1.2%. Thermo- and moisture-stable PMMA–St–Eu and PMMA–TF–Eu beads for solar sealing film are demonstrated for the first time.
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