Enhanced Water Vapor Blocking in Transparent Hybrid Polymer-Nanocrystal Films

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Highly transparent and effective encapsulating materials have become increasingly important for photovoltaic (PV) modules to prevent water vapor molecules from permeating PV cells. The composite consists of block copolymer (PS-b-P2VP), comprised of hydrophobic and hydrophilic parts, and hygroscopic nanocrystals (Magnesium Oxide, MgO) incorporated to enhance water vapor blocking by both presenting obstacles for mass transport and also scavenging water molecules. The water vapor transmission rate (WVTR) values were reduced similar to 3000 times, compared to homopolymer (PS), for both polymer and composite samples. Achieving both high transparency and low WVTR, it is expected that the composite materials can function as an excellent water vapor blocking layer for PV modules.
Publisher
AMER CHEMICAL SOC
Issue Date
2015-01
Language
English
Article Type
Article
Keywords

ASYMMETRIC DIBLOCK COPOLYMERS; BARRIER FILMS; COMPOSITE; MIXTURES; SIZE

Citation

ACS MACRO LETTERS, v.4, no.1, pp.70 - 74

ISSN
2161-1653
DOI
10.1021/mz500765y
URI
http://hdl.handle.net/10203/221025
Appears in Collection
CBE-Journal Papers(저널논문)
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