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US 12,507,488 B2Granted
PV module with film layer comprising hydrophobic-treated fumed silica
AssigneeDow Global Technologies LLC
InventorsChao He, Hong Yang, Weiming Ma, Yunfeng Yang, Yuyan Li, Brian M. Habersberger, Hongyu Chen
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Abstract
A composition for use as a film layer comprises (A) an olefin-based polymer having a volume resistivity greater than 5.0*1015 ohm·cm; (B) a hydrophobic-treated fumed silica; (C) an alkoxysilane; (D) an organic peroxide; and (E) from 0 wt % to 1.5 wt % of a crosslinking co-agent.
Claims17
A photovoltaic module comprising:
- a photovoltaic cell;
- and
- a front encapsulant film layer and a rear encapsulant film layer, the photovoltaic cell secured between the front encapsulant film layer and the rear encapsulant film layer, each encapsulant film layer comprising
- (A) a silane-crosslinked olefin-based polymer, the olefin-based polymer prior to crosslinking having a volume resistivity from greater than 5.0*1015 ohm·cm to 5.0*1016 ohm·cm and consisting of (i) ethylene and (ii) C3-C8 α-olefin comonomer;
- (B) particles of hydrophobic-treated fumed silica disposed in the silane-crosslinked olefin-based polymer, wherein each encapsulant film layer comprises the particles of hydrophobic-treated fumed silica to the exclusion of all other silicas, wherein the hydrophobic-treated fumed silica comprises a hydrophobic agent bonded to the fumed silica, and hydrophobic agent is selected from the group consisting of hexamethyldisilazane (HMDS), dimethyldichlorosilane (DDS), polydimethylsiloxane PDMS) and combinations thereof;
- and
- wherein each film layer has a volume resistivity from greater than or equal to 5.0-8.0*1017 ohm·cm to 6.0*1018 ohm·cm.
4 more elements
A photovoltaic module comprising:
- a photovoltaic cell;
- and
- a first film layer and an opposing second film layer, the photovoltaic cell secured between, and in direct contact with, the first film layer and the opposing second film layer, each film layer composed of a composition which is the reaction product of a composition comprising
- (A) from 90 wt % to less than 100 wt % of an olefin-based polymer having a volume resistivity from greater than 5.0*1015 ohm·cm to 5.0*1016 ohm·cm, the olefin-based polymer consisting of (i) ethylene and (ii) C3-C8 α-olefin comonomer;
- (B) from 0.01 wt % to 5.0 wt % of a hydrophobic-treated fumed silica, wherein the composition comprises the hydrophobic-treated fumed silica to the exclusion of all other silicas, wherein the hydrophobic-treated fumed silica comprises a hydrophobic agent bonded to the fumed silica, and hydrophobic agent is selected from the group consisting of hexamethyldisilazane (HMDS), dimethyldichlorosilane (DDS), polydimethylsiloxane (PDMS) and combinations thereof;
- (C) from 0.01 wt % to 2 wt % of an alkoxysilane;
- (D) from 0.1 wt % to 5.0 wt % of an organic peroxide;
- and
- (E) from 0 wt % to 1.5 wt % of a crosslinking co-agent,
- wherein each film layer has a volume resistivity from greater than or equal to 8.0*1017 ohm·cm to 6.0*1018 ohm·cm.
7 more elements
Dependencies are inferred from the claim text.