Encapsulant Selection for PID Resistant Modules Made with Heterojunction Solar Cells

2020
Conference paper

Abstract

Recent studies showed that SHJ solar cells can be prone to PID when encapsulated with a low volume resistivity encapsulant, such as ethylene vinyl acetate (EVA). These studies also demonstrated that their degradation mechanism is different from Al-BSF modules. It is well known that PID in Al-BSF cells can be prevented by a high volume resistivity encapsulant. In this work we perform PID tests in humid conditions (85°C/85% RH) on one-cell SHJ glass/glass modules with and without edge sealant. Seven different encapsulants are used: ionomer, three elastomer polyolefin (POEs), thermoplastic polyolefin (TPO), polyvinyl butyral (PVB) and EVA. Moreover, the effect of water ingress and the voltage polarization are also considered. The results indicate that PID can be prevented with the proper selection of encapsulants. Ionomer, POEs and TPO show beneficial effects on preventing degradation, both with and without edge sealant. Modules encapsulated with EVA do not suffer from PID when encapsulated with an edge seal configuration, even after extended tests (e.g. five times the 96 h of test duration foreseen in the IEC Technical Specification for c-Si modules).

Official source

https://infoscience.epfl.ch/record/283621?ln=en

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2020
Conference paper

Abstract

Official source

https://infoscience.epfl.ch/record/283621?ln=en

About this result

Ontological neighbourhood

Energy engineering

Solar power: Topics in solar power

Related concepts (21)

A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels.

Crystalline silicon or (c-Si) Is the crystalline forms of silicon, either polycrystalline silicon (poly-Si, consisting of small crystals), or monocrystalline silicon (mono-Si, a continuous crystal). Crystalline silicon is the dominant semiconducting material used in photovoltaic technology for the production of solar cells. These cells are assembled into solar panels as part of a photovoltaic system to generate solar power from sunlight. In electronics, crystalline silicon is typically the monocrystalline form of silicon, and is used for producing microchips.

An organic solar cell (OSC) or plastic solar cell is a type of photovoltaic that uses organic electronics, a branch of electronics that deals with conductive organic polymers or small organic molecules, for light absorption and charge transport to produce electricity from sunlight by the photovoltaic effect. Most organic photovoltaic cells are polymer solar cells. The molecules used in organic solar cells are solution-processable at high throughput and are cheap, resulting in low production costs to fabricate a large volume.

Related publications (32)

Related MOOCs (1)

Encapsulant Selection for PID Resistant Modules Made with Heterojunction Solar Cells

Investigation and Mitigation of Moisture- and Potential-Induced Degradation Mechanisms of Silicon Heterojunction Solar Cells and Modules

Investigation and Mitigation of Moisture- and Potential-Induced Degradation Mechanisms of Silicon Heterojunction Solar Cells and Modules