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Efficient polymer nanocrystal hybrid solar cells by improved nanocrystal composition |
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| Authors: | Yunfei ZhouMichael Eck,Cong MenFrank Rauscher,Phenwisa NiyamakomSeyfullah Yilmaz,Ines DumschSybille Allard,Ullrich ScherfMichael Krü ger |
| Affiliation: | a Freiburg Materials Research Centre (FMF), University of Freiburg, Stefan-Meier-Straße 21, D-79104 Freiburg, Germany b Institute for Microsystems Technology (IMTEK), University of Freiburg, Georges- Köhler-Allee 103, D-79110 Freiburg, Germany c Bayer Technology Services GmbH, Process Technology Building E41, D-51368 Leverkusen, Germany d Macromolecular Chemistry and Institute for Polymer Technology (IFP), University of Wuppertal, Gaußstraße 20, D-42119 Wuppertal, Germany |
| Abstract: | We demonstrate the importance of the nanocrystal surface treatment and the inorganic composition for hybrid solar cells. Mixtures of CdSe nanorods and CdSe quantum dots integrated in hybrid solar cells together with the conjugated polymer poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']-dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) perform better than nanorod and quantum dot only based devices. In addition larger sized quantum dots show a similar improvement after integration in respective solar cells. Power conversion efficiency values exceeding 3% are observed. A first result on the shelf lifetime of such a device is highlighted. |
| Keywords: | Hybrid solar cells Bulk-heterojunction solar cells Quantum dots Semiconductor nanocrystals CdSe |
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