Programm Photovoltaik Ausgabe 2009 ... - Bundesamt für Energie BFE
Programm Photovoltaik Ausgabe 2009 ... - Bundesamt für Energie BFE Programm Photovoltaik Ausgabe 2009 ... - Bundesamt für Energie BFE
7/10 From the UV-VIS data, it is clearly visible that the dye Yellow83 absorbing in the 400 to 500 nm range is degraded first during the 824 hours in the 470 nm LED light, then the degradation goes on with the SolarTest-65 simulated solar light having an intensity of ca. 950 W/m 2 . The absorption of the dye Red305 in the 500 to 600 nm domain is only reduced by a small amount after the 2 irradiation test periods. Graph 7: UV-VIS spectra of sample ECN779 after 824 hours exposure to the 470 nm LED light, followed by 1300 hours irradiation in SolarTest-65 lamp with A-bulb: Similarly to the ECN778 sample, this sample containg the dye Yellow170 sees most degradiation with the Yellow170 component, while the Red305 peak around 575 nm is only reduced in absorption by a rather small amount, after the irradiation tests. Graph 8: UV-VIS spectra of sample ECN780 after 824 hours exposure to the 470 nm LED light, followed by 1300 hours irradiation in SolarTest-65 lamp with A-bulb: Again, in this ECN780 sample, the CRS040 dye absorbing in the 370 to 480 nm range sees most degradation with near complete disappearance of the absorption peak at 440 nm, while the Red305 peak around 575 nm is only reduced in absorption by a rather small amount, after 82 hours 470 nm LED light followed by 1300 hours simulated solar light. Short-circuit photocurrent monitored over time of the 3 samples exposed in simulated solar light irradiation in the SolarTest-65 lamp with the A-bulb, corresponding to ca. 950 W/m 2 light intensity. FULLSPECTRUM, T. Meyer, Solaronix 159/290 Graph 9: Short-circuit current of the FPC side attached Si-cell monitored over time, during SolarTest-65 lamp (A-bulb) irradiation.
The table below shows the change of photocurrent for these 3 samples subject to 1300 hours of simulated solar light irradiation in SolarTest-65 lamp with A-bulb, after having seen the 470 nm light for 824 hours in an earlier stability test: FPC samples measured in Xe-lamp set to 1000 W/m 2 Sample Current at start (mA) Current after 1300 hr SolarTest-65 (mA) Change in current (%) FPC ECN 778 7.95 7.57 - 7 % FPC ECN 779 12.7 14.02 + 11.5 % FPC ECN 780 9.01 8.05 - 10 % Table 3: Short-circuit photocurrent change over time during the 1300 hour long SolarTest-65 simulated sunlight irradiation. FPC samples measured in CDM-1000 lamp set to 1000 W/m 2 Sample Current at start (mA) Current after 1300 hr SolarTest-65 (mA) Change in current (%) FPC ECN 778 11.1 11.16 - 5.4 % FPC ECN 779 18.36 18.8 + 2.4 % FPC ECN 780 11.8 11.36 - 3.7 % Table 4: Short-circuit photocurrent change over time during the 1300 hour long SolarTest-65 simulated sunlight irradiation. The short-circuit currents of the crystalline Si-cells attached on the FPC side show only a minor change after the 1300 hours in the SolarTest-65 simulated solar irradiation set to an intensity of ca. 950 W/m 2 , when measured in a Xe-lamp and the CDM-1000 metal halide lamp. A continous irradation of 1300 hours in simulated solar light corresponds about to 1.3 years of outdoors light exposure in central Europe. The 3 samples ECN778, ECN 779 and ECN 780 have seen in total 824 hours 470 nmLED light corrsponding to the 470 nm light exposure over one year, and 1300 hours of SolarTest-65 lamp with the A-bulb, again adding about 1.3 years of outside equivalent light dose. The dyes Yellow83, Yellow170 and CRS040 are not suited in the current flat plate concentrator application, as these degrade manifestly when exposed to high light doses. 2) Accelerated light soaking tests with quantum dot flat plate concentrators (QD-FPC) provided by the University of Utrecht and the FHG-IAP Golm. Quantum dot containing FPC (QD-FPC) composition: FULLSPECTRUM, T. Meyer, Solaronix 160/290 Table 5: QD-FPC sample compositions investigated during simulated sunlight test in the SolarTest lamp. 8/10
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The table below shows the change of photocurrent for these 3 samples subject to 1300 hours of<br />
simulated solar light irradiation in SolarTest-65 lamp with A-bulb, after having seen the 470 nm light for<br />
824 hours in an earlier stability test:<br />
FPC samples measured in Xe-lamp set to 1000 W/m 2<br />
Sample Current at start (mA) Current after 1300 hr SolarTest-65 (mA) Change in current (%)<br />
FPC ECN 778 7.95 7.57 - 7 %<br />
FPC ECN 779 12.7 14.02 + 11.5 %<br />
FPC ECN 780 9.01 8.05 - 10 %<br />
Table 3: Short-circuit photocurrent change over time during the 1300 hour long SolarTest-65 simulated<br />
sunlight irradiation.<br />
FPC samples measured in CDM-1000 lamp set to 1000 W/m 2<br />
Sample Current at start (mA) Current after 1300 hr SolarTest-65 (mA) Change in current (%)<br />
FPC ECN 778 11.1 11.16 - 5.4 %<br />
FPC ECN 779 18.36 18.8 + 2.4 %<br />
FPC ECN 780 11.8 11.36 - 3.7 %<br />
Table 4: Short-circuit photocurrent change over time during the 1300 hour long SolarTest-65 simulated<br />
sunlight irradiation.<br />
The short-circuit currents of the crystalline Si-cells attached on the FPC side show only a minor<br />
change after the 1300 hours in the SolarTest-65 simulated solar irradiation set to an intensity of ca.<br />
950 W/m 2 , when measured in a Xe-lamp and the CDM-1000 metal halide lamp.<br />
A continous irradation of 1300 hours in simulated solar light corresponds about to 1.3 years of<br />
outdoors light exposure in central Europe.<br />
The 3 samples ECN778, ECN 779 and ECN 780 have seen in total 824 hours 470 nmLED light<br />
corrsponding to the 470 nm light exposure over one year, and 1300 hours of SolarTest-65 lamp with<br />
the A-bulb, again adding about 1.3 years of outside equivalent light dose.<br />
The dyes Yellow83, Yellow170 and CRS040 are not suited in the current flat plate concentrator<br />
application, as these degrade manifestly when exposed to high light doses.<br />
2) Accelerated light soaking tests with quantum dot flat plate concentrators (QD-FPC)<br />
provided by the University of Utrecht and the FHG-IAP Golm.<br />
Quantum dot containing FPC (QD-FPC) composition:<br />
FULLSPECTRUM, T. Meyer, Solaronix<br />
160/290<br />
Table 5: QD-FPC sample compositions<br />
investigated during simulated sunlight test<br />
in the SolarTest lamp.<br />
8/10
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