Recombination and loss analysis in polythiophene based bulk heterojunction photodetectors
The monochromatic external quantum efficiency of a bulk heterojunction photodetector based on a blend of poly-3(hexylthiophene) with a methanofullerene is reported to be as high as 76% at the peak maximum at 25 °C. Analysis of the temperature dependence, the illumination intensity dependence togethe...
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| Published in: | Applied physics letters Vol. 81; no. 20; pp. 3885 - 3887 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
11-11-2002
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| Online Access: | Get full text |
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| Summary: | The monochromatic external quantum efficiency of a bulk heterojunction photodetector based on a blend of poly-3(hexylthiophene) with a methanofullerene is reported to be as high as 76% at the peak maximum at 25 °C. Analysis of the temperature dependence, the illumination intensity dependence together with absorption measurements in reflection geometry, allow calculation of the internal quantum efficiency of the device close to 100% at the peak maximum. Recombination of photoinduced carriers is negligible or even absent in these photodetectors when operated in the photovoltaic mode. Optical losses in these bulk heterojunction devices are analyzed. |
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| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.1521244 |