| Zugriffsnummer | 43822 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Determining the spectral responsivity of solar cells under standard test conditions |
| Autor(in); Institution |
Hinken, D.; Institut für Solarenergieforschung GmbH, Emmerthal, GERMANY
Kröger, Ingo; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Winter, Stefan; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Brendel, R.; Institut für Solarenergieforschung GmbH, Emmerthal, GERMANY; Leibniz Universität Hannover, Institute of Solid State Physics, Hannover, GERMANY
Bothe, K.; Institut für Solarenergieforschung GmbH, Emmerthal, GERMANY
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| Quelle/Jahr | Measurement Science and Technology: 30 (2019), 12, 1 - 6 |
| Artikelnummer | 125008 |
| ISSN | 0957-0233 (PRINT) ; 1361-6501 (ONLINE) |
| DOI | |
| Verlag | Bristol: IOP Publishing |
| Freie Schlagworte | photovoltaics ; solar cells ; solar cell characterization ; solar cell calibration ; spectral responsivity ; differential spectral responsivity |
| Zusammenfassung | The spectral responsivity sλ,STC(λ) of solar cells is widely used for cell analysis or calibration purposes. According to the IEC60904-8:2014 standard, the reference method for the determination of sλ,STC(λ) is the complete differential spectral responsivity approach. For this approach, the differential spectral responsivity s˜(λ) is measured as a function of wavelength and bias irradiance. To obtain the spectral responsivity sλ,STC(λ) related to standard test conditions the IEC60904-8:2014 standard recommends to integrate 1/s˜(λ) via bias current Ib for each wavelength. We show that this integration is wrong. It lacks analytical derivation and provides faulty curves for non-linear solar cells. We prove analytically and by means of simulations that the correct way of calculation is either the integration of s˜(λ) via the bias irradiance Eb or the integration of s˜(λ)/s˜AMx via the bias current Ib, with s˜AMx being the AMx-weighted (e.g. AM1.5G or AM1.5D) differential responsivity. A simulation of the differential spectral responsivity of a strongly non-linear solar cell demonstrates deviations of sλ,STC(λ) up to 30% for (the wrong) integration of 1/s˜(λ) via Ib at some wavelengths, corresponding to a deviation in the short-circuit current of up to 3.0%. |
