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Polarization Type Potential Induced Degradation under Positive Bias in a Commercial PERC Module

Conference ·
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Potential induced degradation of the polarization type (PID-p) can reduce module performance in a relatively short period of time. PID-p can occur at both voltage polarities, but most studies are focused on degradation under a negative bias. This paper uses commercial bifacial passivated emitter and rear contact (PERC) cells within a monofacial glass-backsheet module construction to evaluate the impact of PID-p under a positive bias on the front side. Using the aluminum-foil (Al-foil) method, the module was stressed for PID in an environmental chamber. After the stress, the maximum power (Pmax) showed a decline of 3.1% at 1000 W/m2 and 6.2% at 200 W/m2. Recovery under light was also investigated. Complete recovery was observed at high irradiance, while a partial recovery was seen at lower irradiance. The outcomes of this study can help in understanding PID-p degradation under a positive bias and its recovery under the light.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
2309703
Report Number(s):
NREL/CP-5K00-88874; MainId:89653; UUID:ca1b9392-ef9b-41cb-8ff1-f80aff87e7ae; MainAdminId:71869
Resource Relation:
Conference: Presented at the 2023 IEEE 50th Photovoltaic Specialists Conference (PVSC), 11-16 June 2023, San Juan, Puerto Rico; Related Information: 86992
Country of Publication:
United States
Language:
English

References (13)

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Explanation of potential-induced degradation of the shunting type by Na decoration of stacking faults in Si solar cells journal January 2014
Local Corrosion of Silicon as Root Cause for Potential‐Induced Degradation at the Rear Side of Bifacial PERC Solar Cells journal May 2019
Time‐Resolved Investigation of Transient Field Effect Passivation States during Potential‐Induced Degradation and Recovery of Bifacial Silicon Solar Cells journal May 2021
Impact of illumination and encapsulant resistivity on polarization‐type potential‐induced degradation on n‐PERT cells journal December 2021
Potential-Induced Degradation (PID): Incomplete Recovery of Shunt Resistance and Quantum Efficiency Losses journal November 2015
Application of reverse bias recovery technique to address PID issue: Incompleteness of shunt resistance and quantum efficiency recovery conference June 2014

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Related Subjects

SOLAR ENERGY
PERC
polarization
positive bias
potential induced degradation
recovery