Measurement of Multi-Junction Solar Cells

Heidler, K.; Muller-Bierl, B.

doi:10.1007/978-94-011-3622-8_29

Cited by 6 publications

(8 citation statements)

References 6 publications

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“…In this case, in order to adjust the single‐source simulator spectrum, the spectral distribution has to be changed as well as the light intensity, which in turn modifies the values of the M i , and thus the simulator spectrum has to be measured again to recalculate them. Therefore, an iterative procedure has to be applied, which can be very time‐consuming …”

Section: Experimentalsmentioning

confidence: 99%

“…Therefore, the solar simulator spectrum has to be carefully adjusted in order to obtain the same current balance between the subcells as the one obtained under the reference spectrum . Current 2 T MJSC characterization methods are based either on expensive multisource solar simulators, relay on perfectly matched isotypes or are very time‐consuming …”

Section: Introductionmentioning

confidence: 99%

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Characterization of dual‐junction III‐V on Si tandem solar cells with 23.7% efficiency under low concentration

Veinberg‐Vidal

Vauche

Medjoubi

et al. 2019

Progress in Photovoltaics

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Monolithic two-terminal III-V on Si dual-junction solar cells, designed for low concentration applications, were fabricated by means of surface-activated direct wafer bonding. The III-V top cell is a heterojunction formed by an n-Ga 0.5 In 0.5 P emitter and a p-Al 0.2 Ga 0.8 As base. An efficiency of 21.1 ± 1.5% at one sun and 23.7 ± 1.7% at 10 suns is demonstrated, which to our knowledge is the best dual-junction twoterminal III-V on Si tandem cell efficiency reported to date under verified reference conditions. The I-V characterization of these 1-cm 2 tandem cells under concentration required the development of a new method using a single-source multiflash solar simulator and not perfectly matched component cells, also known as pseudoisotypes, formed by Si single-junction cells and optical filters. In addition, the spectrum of the pulsed solar simulator was measured using a high-speed CMOS spectrometer, allowing the calculation of the spectral mismatch correction factor. Merging these two techniques results in the hybrid corrected pseudo-isotype (HCPI) characterization method, which shows a fast and accurate performance with a simplified procedure based on a single-source solar simulator. Pseudo-isotypes are easily adaptable to new cell designs by simply using a different filter, hence allowing the characterization of new multijunction solar cell architectures.

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Section: Experimentalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of dual‐junction III‐V on Si tandem solar cells with 23.7% efficiency under low concentration

Veinberg‐Vidal

Vauche

Medjoubi

et al. 2019

Progress in Photovoltaics

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“…Only the overall current/voltage-characteristic (JV) of the tandem cell, but not the individual JV-characteristics of the sub cells can be measured. This leads to further challenges when characterizing tandem cells [6,7] and especially when comparing differently matched tandem cells, as we will discuss in sections III-V.…”

Section: Introductionmentioning

confidence: 98%

Degradation of tandem solar cells: Separating matching effects from Staebler-Wronski Effect using the Power-Matching-Method

Blank

Ulbrich

Pieters

et al. 2014

2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

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In thin-film tandem solar cells the sub cells are usually connected in series. The inherent current-limitation needs to be considered when optimizing the efficiency, but furthermore leads to challenges when comparing the sub cells performances of differently matched tandem cells. We have introduced the PowerMatching-Method that characterizes the device not only under one standard spectrum but under various spectral distributions. By this method, the same tandem cell can be characterized under various matching conditions. Based on simulations, we demonstrate a convenient way to compare differently matched tandem solar cells. Moreover, our simulations show that the method allows distinguishing between matching effects and changes in the sub-cells properties, e.g. changes due to the Staebler-Wronski-Effect.

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“…A further class of measurement techniques exploits light sources with a specifically tailored spectrum: This causes the selectively illuminated solar device to provide a greater response from one subcell with respect to the others. () We here employ this same principle for developing a specific method to determine the limiting subcell in irradiated multijunction monolithic solar cells for space applications. It is based on measuring the J ‐ V curves of 3J cells simultaneously excited by 2 light sources: a solar simulator AM0 lamp and a tunable lamp coupled with a suitable band pass wavelength filter.…”

Section: Introductionmentioning

confidence: 99%

“…5,18,22,23 A further class of measurement techniques exploits light sources with a specifically tailored spectrum: This causes the selectively illuminated solar device to provide a greater response from one subcell with respect to the others. [24][25][26][27] We here employ this same principle for developing a specific method to determine the limiting subcell in irradiated multijunction monolithic solar cells for space applications.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the limiting subcell in multijunction space solar devices by restricted‐wavelength‐range illumination

Arcadi

Parravicini

Campesato

et al. 2018

Progress in Photovoltaics

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During their employment in space applications, InGaP/InGaAs/Ge‐based multijunction solar cells undergo strong particle bombardments that decrease their performances. As InGaP is more resistant to radiation, the whole device is usually designed in “top‐limited” configuration. Then the development of high‐efficiency and reliable devices needs standard techniques for identifying the limiting subcell before and after irradiation. We here present a specific method to determine the limiting subcell and matching current in multijunction solar cell. This approach is based on using simultaneously a solar simulator and a suitable supplemental lamp for illuminating the cell in a restricted wavelength range where the top subcell only responds. The technique is tested on beginning‐of‐life and irradiated 3‐junction InGaP/InGaAs/Ge solar cells, and its reliability is discussed.

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Measurement of Multi-Junction Solar Cells

Cited by 6 publications

References 6 publications

Characterization of dual‐junction III‐V on Si tandem solar cells with 23.7% efficiency under low concentration

Characterization of dual‐junction III‐V on Si tandem solar cells with 23.7% efficiency under low concentration

Degradation of tandem solar cells: Separating matching effects from Staebler-Wronski Effect using the Power-Matching-Method

Measurement of the limiting subcell in multijunction space solar devices by restricted‐wavelength‐range illumination

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