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High Performance Multilayer Encapsulant Films for Photovoltaic Modules

IP.com Disclosure Number: IPCOM000249839D
Publication Date: 2017-Apr-13
Document File: 6 page(s) / 224K

Publishing Venue

The IP.com Prior Art Database

Abstract

A novel multilayer film approach is proposed to overcome the current limitation with the ethylene vinyl acetate copolymer (EVA) based encapsulant film/sheets used in photovoltaic cell applications. This proposed multilayer film solution will combine the properties of different polymers to attain the desired properties (i.e., a customized solution). This solution can enhance the efficiency and life span of the photovoltaic module and yet provide a more economical solution.

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High performance Multilayer Encapsulant Films for Photovoltaic Modules Abstract: A novel multilayer film approach is proposed to overcome the current limitation with the ethylene vinyl acetate copolymer (EVA) based encapsulant film/sheets used in photovoltaic cell applications. This proposed multilayer film solution will combine the properties of different polymers to attain the desired properties (i.e., a customized solution). This solution can enhance the efficiency and life span of the photovoltaic module and yet provide a more economical solution. Background

A photovoltaic cell (PV) module generally comprises of a front sheet (light incident side

usually made off glass), a front encapsulant sheet, the PV cell layer, a back encapsulant sheet and

a back sheet (typically polymer sheet/glass). The main functions of the encapsulant layers are to

protect the PV module from the mechanical shock and weathering, while permitting light to pass

to the active PV cells to produce electricity.

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The encapsulant sheet is typically a thick mono layer film/sheet (thickness range: 100 µm

to 1000 µm). Various materials e.g. ethylene vinyl acetate copolymer (EVA) or thermoplastic

based polyolefin (TPO, e.g. plastomers) or polyvinyl butyral (PVB) or silicon, etc. are used as

encapsulant material in the market place. EVA is by far the main choice of material as an

encapsulant. EVA based encapsulant brings several adv...