Modification of a transient EPR and photoluminescence detection setup
Climate change has given rise to higher demand of renewable energy. Conventional non-organic solar cells are still seen the most on the market but the last 10-20 years there has been an exponential increase in research about organic solar cells. The research demands measurements done on increasing f...
| Main Author: | |
|---|---|
| Format: | Others |
| Language: | English |
| Published: |
Uppsala universitet, Institutionen för fysik och astronomi
2017
|
| Subjects: | |
| Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328896 |
| Summary: | Climate change has given rise to higher demand of renewable energy. Conventional non-organic solar cells are still seen the most on the market but the last 10-20 years there has been an exponential increase in research about organic solar cells. The research demands measurements done on increasing fast time scales as insights about the topic and technology develops. Here is presented configurations done at the Isaak spectrometer at Freie Universit\"{a}t Berlin. The spectrometer is used for studying charge transport in organic solar cells as well as hybrid solar cells made from organic and inorganic semiconductors. One important feature for the time response is the Q factor property of the resonator in which the sample is placed. The Q factor describes the rate of energy loss relative to the stored energy of the resonator. The Q factor dependency over different temperature was studied in order to gain vital knowledge about the time response of the setup. Further new equipment was been installed at the setup and programmed in FSC2. This in order to increase the sensitivity of the optical setup, secure the personnel from possible dangerous excitation laser and in order to do more automated measurements. As the optical path was modified by installing a new optical fiber a new calibration had to be done. Finally, in order to try the functionality of the new equipment an automated energy dependency measurement was done on the polymer MEH-PPV and the polymer:fullerene blend MEH-PPV:PCBM. The automatic process of measuring was successful. |
|---|