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The Global ETD Search service is a free service for researchers
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Built-in voltage of organic bulk heterojuction p-i-n solar cells measured by electroabsorption spectroscopySiebert-Henze, Ellen, Lyssenko, Vadim G., Fischer, Janine, Tietze, Max, Brueckner, Robert, Schwarze, Martin, Vandewal, Koen, Ray, Debes, Riede, Moritz, Leo, Karl 17 July 2014 (has links) (PDF)
We investigate the influence of the built-in voltage on the performance of organic bulk heterojuction solar cells that are based on a p-i-n structure. Electrical doping in the hole and the electron transport layer allows to tune their work function and hence to adjust the built-in voltage: Changing the doping concentration from 0.5 to 32 wt% induces a shift of the work function towards the transport levels and increases the built-in voltage. To determine the built-in voltage, we use electroabsorption spectroscopy which is based on an evaluation of the spectra caused by a change in absorption due to an electric field (Stark effect). For a model system with a bulk heterojunction of BF-DPB and C60, we show that higher doping concentrations in both the electron and the hole transport layer increase the built-in voltage, leading to an enhanced short circuit current and solar cell performance.
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Built-in voltage of organic bulk heterojuction p-i-n solar cells measured by electroabsorption spectroscopySiebert-Henze, Ellen, Lyssenko, Vadim G., Fischer, Janine, Tietze, Max, Brueckner, Robert, Schwarze, Martin, Vandewal, Koen, Ray, Debes, Riede, Moritz, Leo, Karl 17 July 2014 (has links)
We investigate the influence of the built-in voltage on the performance of organic bulk heterojuction solar cells that are based on a p-i-n structure. Electrical doping in the hole and the electron transport layer allows to tune their work function and hence to adjust the built-in voltage: Changing the doping concentration from 0.5 to 32 wt% induces a shift of the work function towards the transport levels and increases the built-in voltage. To determine the built-in voltage, we use electroabsorption spectroscopy which is based on an evaluation of the spectra caused by a change in absorption due to an electric field (Stark effect). For a model system with a bulk heterojunction of BF-DPB and C60, we show that higher doping concentrations in both the electron and the hole transport layer increase the built-in voltage, leading to an enhanced short circuit current and solar cell performance.
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