Class AAA LED-Based Solar Simulator for Steady-State Measurements and Light Soaking

Stückelberger, Michael; Perruche, Brice; Bonnet-Eymard, Maximilien; Riesen, Yannick; Despeisse, M.; Haug, Franz‐Josef; Ballif, Christophe

doi:10.1109/jphotov.2014.2335738

Cited by 39 publications

(27 citation statements)

References 5 publications

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“…The author used low ripple power supply with the constant current control as the LED driver. This is in accordance with the study results of Bazzi [3] and the design of Novickovas [1] and Stuckelberger [12] whose results showed that the uniformity measurements were also in class A. …”

Section: ) Short-term Instability Testsupporting

confidence: 92%

“…Stuckelberger. [12] presented the class AAA LEDs-based solar simulator. The simulator is comprised of 11 colors of 19 LEDs (399-728 n.m.).…”

Section: Literature Reviewmentioning

confidence: 99%

“…According with the study of Stuckelberger. [12] Moreover, the author kept the distance between the light source and the test area to about 45 cm which is well positioned for an excellent non-uniformity. That conforms to the study of Watjanatepin [15] Shatat [17]and Mohan.…”

Section: A Non-uniformity Of Irradiancementioning

confidence: 99%

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Design Construct and Evaluation of Six- Spectral LEDs-Based Solar Simulator Based on IEC 60904-9

Watjanatepin¹

2017

IJET

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Abstract-This article presents the optical design of a six-spectral LED-based solar simulator. The study focuses on the measurement methods of spectral match, the non-uniformity and the temporal instability on the test plane. The proposed six-spectral LED solar simulator has an illuminated area of 900 cm 2 and can characterize medium size photovoltaic devices under variable irradiance. The spectral range covered is between 400 nm and 1100 nm which offer the capability of characterizing silicon PV technologies. The evaluation method is in accordance with IEC 60904-9. The Solar Power meter was used to measure the irradiance and a Compact Array Spectrometer and Fiber optic spectrometer were applied for the spectral match test. The irradiance is controlled via LabVIEW which can adjust the power to drive all LEDs in the constant current mode. The irradiance of 1000 W/m 2 was applied during testing. The results found that the spectral match classification is of class B. The non-uniformity of irradiance is of A-class across the illuminated area. The temporal instability of irradiance is capable of reaching class A. This idea is perfectly appropriate for the application of the testing of I-V characteristic of the silicon solar cell. For future work, the author has to improve the spectral match to reach an A Class.

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Section: ) Short-term Instability Testsupporting

confidence: 92%

“…Stuckelberger. [12] presented the class AAA LEDs-based solar simulator. The simulator is comprised of 11 colors of 19 LEDs (399-728 n.m.).…”

Section: Literature Reviewmentioning

confidence: 99%

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Design Construct and Evaluation of Six- Spectral LEDs-Based Solar Simulator Based on IEC 60904-9

Watjanatepin¹

2017

IJET

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“…III B and III D. The other four solar cells were contacted by ultrasonic soldering and light soaked with in-situ measurement of the LID kinetics. These measurements were performed with three-sun-equivalent illumination for one day at 50 C. A dedicated solar simulator 43 fully based on light-emitting diodes (LEDs) and built in-house was used for these measurements, which are presented in Sec. III C.…”

Section: Methodsmentioning

confidence: 99%

Light-induced Voc increase and decrease in high-efficiency amorphous silicon solar cells

Stückelberger

Riesen

Despeisse

et al. 2014

Journal of Applied Physics

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High-efficiency amorphous silicon (a-Si:H) solar cells were deposited with different thicknesses of the p-type amorphous silicon carbide layer on substrates of varying roughness. We observed a light-induced open-circuit voltage (V oc ) increase upon light soaking for thin p-layers, but a decrease for thick p-layers. Further, the V oc increase is enhanced with increasing substrate roughness. After correction of the p-layer thickness for the increased surface area of rough substrates, we can exclude varying the effective p-layer thickness as the cause of the substrate roughness dependence. Instead, we explain the observations by an increase of the dangling-bond density in both the p-layer-causing a V oc increase-and in the intrinsic absorber layer, causing a V oc decrease. We present a mechanism for the light-induced increase and decrease, justified by the investigation of light-induced changes of the p-layer and supported by Advanced Semiconductor Analysis simulation. We conclude that a shift of the electron quasi-Fermi level towards the conduction band is the reason for the observed V oc enhancements, and poor amorphous silicon quality on rough substrates enhances this effect.

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“…The cost of the entire system is below $ 20,000, with most of the budget going towards the data acquisition hardware. [6][7][8]. LED based solar simulators are also commercially available, somewhere within the $25K range for a class AAA simulator of 2x2 inch illumination, which is more or less the same price range compared to a xenon lamp based counterpart of the same dimensions [5].…”

mentioning

confidence: 99%

A low cost, large area light soaking and testing station

Ogulgonen

Kıncal

2015

Phys. Status Solidi C

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Test stations for accelerated aging tests are crucial in the development of commercial solar panel manufacturing technologies. Such test‐beds must provide a reasonably uniform flux whose spectral distribution is an acceptable match to the solar spectrum. This work outlines the detailed design on a low cost test system based on metal‐ halide lamps that can deliver a simulated solar flux of up to 3 suns on a 100 cm by 100 cm square area with an intensity variation of around 15%. A total of 9 metal‐halide lamps, each rated at 1000 W, is placed on top an enclosure which has a sample holding table whose distance to the lamps can be adjusted anywhere between 10 cm and 70 cm. A series of fans, blow ambient air over the panels being tested in order to maintain surface temperatures. The system is complemented by the necessary instrumentation to capture IV curves simultaneously for up to 8 solar devices. A model based design strategy is adopted during the construction of the test station in order to predict and optimize the light distribution as well as the thermal behaviour. Sample IV data from commercial thin film Si solar cells are reported to demonstrate the stability of operation. The cost of the entire system is below $ 20,000, with most of the budget going towards the data acquisition hardware. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Class AAA LED-Based Solar Simulator for Steady-State Measurements and Light Soaking

Cited by 39 publications

References 5 publications

Design Construct and Evaluation of Six- Spectral LEDs-Based Solar Simulator Based on IEC 60904-9

Design Construct and Evaluation of Six- Spectral LEDs-Based Solar Simulator Based on IEC 60904-9

Light-induced Voc increase and decrease in high-efficiency amorphous silicon solar cells

A low cost, large area light soaking and testing station

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