Rapid Testing of External Quantum Efficiency using LED Solar Simulators

Luka, Tabea; Eiternick, S.; Turek, Marko

doi:10.1016/j.egypro.2015.07.018

Cited by 16 publications

(6 citation statements)

References 3 publications

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“…Their most promising applications are expected to take the advantage of the ability to tune the spectral emission, which can make different effects in the solar cells operation arise, depending on the energy of the incident photons [13]. They can also be used to drive specific characterizations, from external quantum efficency fast retrieval [14] to study dew formation in outdoor conditions [15]. Of course, LED illumination is interesting This work is licensed under a Creative Commons Attribution 4.0 License.…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost LED-Based Solar Simulator

López-Fraguas

Sánchez‐Pena

Vergaz

2019

IEEE Trans. Instrum. Meas.

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Solar simulators are a fundamental instrument to characterize solar cells parameters, as they can reproduce the operating conditions under which the solar cells are going to work. However, these systems are frequently big, heavy, and expensive, and a small solar simulator could be a good contribution to test small prototyping devices manufactured in research labs, especially if it could manage the irradiation at any wavelength interval in a custom way. We have designed, developed, and calibrated a small solar simulator made entirely with LEDs, no optics inside, and electronically controlled through a PC using an Arduino microcontroller. The whole structure is 3-D printed in black PLA plastic. The electrical current through the LEDs, and thus the spectral irradiance of the simulator, is controlled with a very intuitive LabVIEW interface. As our calibration proves, we have built an easily reproducible and lowcost Class AAA solar simulator in a central illumination area of 1 cm 2 , according to the IEC60904-9 standard. This means that the homogeneity in that area is under a 2% deviation in spatial terms, below 0.5% in temporal terms, and is a factor of a 3% close to the AM1.5G sun reference spectrum. The system can be built and used in any research lab to get quick tests of new small solar cells of any material.

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Section: Introductionmentioning

confidence: 99%

A Low-Cost LED-Based Solar Simulator

López-Fraguas

Sánchez‐Pena

Vergaz

2019

IEEE Trans. Instrum. Meas.

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“…Introduction : In 2012, multi‐crystalline silicon (mc‐Si) passivated emitter and rear cells (PERC) were shown to suffer from strong light‐induced degradation effects, and this has been the focus of many subsequent studies . The degradation and subsequent regeneration rates are sped‐up with increasing temperature, leading to the widely used terminology to describe this phenomenon, light and elevated temperature induced degradation (LeTID).…”

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confidence: 99%

Modulation of Carrier‐Induced Defect Kinetics in Multi‐Crystalline Silicon PERC Cells Through Dark Annealing

et al. 2017

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In this letter, we report on significant changes caused after dark annealing to the kinetics of the carrier‐induced defect, present in p‐type multi‐crystalline silicon PERC cells. The characteristic shapes of the degradation and regeneration curves under light soaking at 75 °C are dramatically altered, depending on the temperature of an initial dark anneal on the non‐degraded cell. Dark annealing for a fixed time (2.5 h) at temperatures of 200 °C or below, is found to accelerate both the subsequent degradation and regeneration rate and the degradation severity, while at higher temperatures it appears that a possible second defect with a significantly longer degradation and regeneration rate is activated. Through a further increase of the dark annealing temperature, the magnitude of this slow degradation is suppressed. This data provides essential information into the role that thermal history plays in the behavior of the still unidentified defect or defects, which is crucial for future studies of the degradation and methods to mitigate it.

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“…-The power measurements can be combined with a spectral resolved analysis. 3,4) -They have a very fast response characteristic with minimal delay. -The LED spectra does not contain emission spikes (special filters are not required).…”

Section: Introductionmentioning

confidence: 99%

Spectral mismatch and solar simulator quality factor in advanced LED solar simulators

Scherff¹,

Nutter²,

Fuß-Kailuweit³

et al. 2017

Jpn. J. Appl. Phys.

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Solar cell simulators based on light emitting diodes (LED) have the potential to achieve a large potential market share in the next years. As advantages they can provide a short and long time stable spectrum, which fits very well to the global AM1.5g reference spectrum. This guarantees correct measurements during the flashes and throughout the light engines’ life span, respectively. Furthermore, a calibration with a solar cell type of different spectral response (SR) as well as the production of solar cells with varying SR in between two calibrations does not affect the correctness of the measurement result. A high quality 21 channel LED solar cell spectrum is compared to former study comprising a standard modified xenon spectrum light source. It is shown, that the spectrum of the 21-channel-LED light source performs best for all examined cases.

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Rapid Testing of External Quantum Efficiency using LED Solar Simulators

Cited by 16 publications

References 3 publications

A Low-Cost LED-Based Solar Simulator

A Low-Cost LED-Based Solar Simulator

Modulation of Carrier‐Induced Defect Kinetics in Multi‐Crystalline Silicon PERC Cells Through Dark Annealing

Spectral mismatch and solar simulator quality factor in advanced LED solar simulators

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