Publications:
Title: |
Establishment of wavelength traceability of a DSR-facility using array spectroradiometers and a Fourier-Transform Spectroradiometer |
|---|---|
| Author(s): | , , , and |
| Journal: | Proceedings of the 29th European PV Solar Energy Conference and Exhibition |
| Year: | 2014 |
| Pages: | 3447 - 3451 |
| Conference name: | 29th European Photovoltaic Solar Energy Conference and Exhibition |
| DOI: | 10.4229/EUPVSEC20142014-5DV.3.51 |
| ISBN: | 3-936338-34-5 |
| Abstract: | The wavelength calibration of a monochromator based differential spectral responsivity (DSR)-facility becomes of crucial importance if the spectral responsivities (SR) of solar cells under test differ significantly from the SR of the reference detector. Since the latter is mainly based on crystalline silicon, this problem is of major importance for the calibration of spectrally filtered reference solar cells as well as for all types of thin films solar cells including organic photovoltaic (PV). Here we show a new traceability chain for the wavelength calibration at PTB using a Fourier-Transform-Spectroradiometer (FTS). The FTS is calibrated against an external HeNe-laser in order to correct for misalignment of the internal optics and the internal HeNe-laser. The FTS is calibrated radiometrically against a standard lamp for correction of the SR of the internal detectors. Hence the FTS is traceable to the SI-unit system. Then an array-spectroradiometer is calibrated against the FTS using the tunable quasi-monochromatic radiation of a DSR-facility in the whole spectral range of the array-spectroradiometer. Thus the wavelength scale of this array-spectroradiometer is traceably to the SI and is then applied for wavelength calibration of PTB’s DSR facilities. |