Treatment of Light-Induced Degradation for Solar Cells in a p-PERC Solar Module via Induction Heating
Open Access
Abstract
In the photovoltaic industry, there is great interest in increasing the power output of solar cells to achieve grid parity and to promote the widespread use of solar cells. However, despite many developments, a phenomenon called light-induced degradation causes the efficiency of solar cells to deteriorate over time. This study proposes a treatment that can be applied to cells within solar modules. It uses a half-bridge resonance circuit to induce a magnetic field and selectively heat Al electrodes in the solar cells. The electrical state of a solar module was measured in real time as it was being heated, and the results were combined with a kinetics simulation using a cyclic reaction. As the temperature of the solar module increased, the time taken to reach the saturation point and the recovery time decreased. Moreover, the value of the saturation point increased. The light-induced degradation activation energy was similar to results in the existing literature, suggesting that the kinetic model was valid and applicable even when 72 cells were connected in series. This demonstrates that an entire solar module can be treated when the cells are connected in series, and in future multiple modules, could be connected in series during treatment.Keywords
This publication has 27 references indexed in Scilit:
- Acceleration and mitigation of carrier-induced degradation in p-type multi-crystalline siliconPhysica Status Solidi (RRL) – Rapid Research Letters, 2016
- Degradation of multicrystalline silicon solar cells and modules after illumination at elevated temperatureSolar Energy Materials and Solar Cells, 2015
- Grown-in defects limiting the bulk lifetime of p-type float-zone silicon wafersJournal of Applied Physics, 2015
- Light-induced degradation and metastable-state recovery with reaction kinetics modeling in boron-doped Czochralski silicon solar cellsApplied Physics Letters, 2014
- Stability of the regeneration of the boron–oxygen complex in silicon solar cells during module certificationSolar Energy Materials and Solar Cells, 2014
- Stability of the regeneration of the boron–oxygen complex in silicon solar cells during module integrationSolar Energy Materials and Solar Cells, 2013
- Slow down of the light-induced-degradation in compensated solar-grade multicrystalline siliconApplied Physics Letters, 2008
- Kinetics of the electronically stimulated formation of a boron-oxygen complex in crystalline siliconPhysical Review B, 2007
- Electronically activated boron-oxygen-related recombination centers in crystalline siliconJournal of Applied Physics, 2006
- 19.8% efficient “honeycomb” textured multicrystalline and 24.4% monocrystalline silicon solar cellsApplied Physics Letters, 1998