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Determining the spectral responsivity of solar cells under standard test conditions
| Content Provider | Scilit |
|---|---|
| Author | Hinken, David Kröger, I. Winter, Stefan Brendel, Rolf Bothe, Karsten |
| Copyright Year | 2019 |
| Description | Journal: Measurement Science and Technology The spectral responsivity $s_{λ,STC}$(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 $s_{λ,STC}$(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 $s_{λ,STC}$(λ) related to standard test conditions the IEC60904-8:2014 standard recommends to integrate 1/s~(λ) via bias current $I_{b}$ for each wavelength. We show that this integration is wrong. It lacks analytical derivation and provides faulty curves for non-linear solar cells. We proof analytically and by means of simulations that the correct way of calculation is either the integration of s~(λ) via the bias irradiance $E_{b}$ or the integration of $s~(λ)/s~_{AMx}$ via the bias current $I_{b}$, 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 $s_{λ,STC}$(λ) up to 30 % for (the wrong) integration of 1/s~(λ) via $I_{b}$ at some wavelengths, corresponding to a deviation in the short-circuit current of up to 3.0 %. |
| Related Links | https://iopscience.iop.org/article/10.1088/1361-6501/ab34ef/pdf |
| ISSN | 09570233 |
| e-ISSN | 13616501 |
| DOI | 10.1088/1361-6501/ab34ef |
| Journal | Measurement Science and Technology |
| Issue Number | 12 |
| Volume Number | 30 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2019-07-25 |
| Access Restriction | Open |
| Subject Keyword | Journal: Measurement Science and Technology Differential Spectral Spectral Responsivity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Instrumentation Engineering |
