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CONTROLLING THE 3D NANOSCALE ORGANIZATION OF BULK HETEROJUNCTION POLYMER SOLAR CELLS |
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| Authors: | Svetlana S.van Bavel Erwan Sourty Gijsbertus de Witha Joachim Loos a Laboratory of Materials Interface Chemistry Soft Matter Cryo-TEM Research Unit Eindhoven University of Technology P.O.Box NL- MB Eindhoven The Netherl s b Laboratory of Polymer Technology The Netherl s c Dutch Polymer Institute P.O.Box NL- AX Eindhoven The Netherl s d FEI Company Achtseweg Noord NL-I GG Eindhoven The Neth... |
| Affiliation: | a;c;a;d;a;c;b |
| Abstract: | In this study,the three dimensional nanoscale organization in the photoactive layers of poly(3-hexylthiophene)(P3HT) and a methanofullerene derivative (PCBM) is revealed by transmission electron tomography.After annealing treatment,either at elevated temperature or during slow solvent evaporation,nanoscale interpenetrating networks are formed with high crystalline order and favorable concentration gradients of both components through the thickness of the photoactive layer.Such a tailored morphology accounts for the considerable increase of the power conversion efficiency in corresponding solar cell devices. |
| Keywords: | Polymer solar cells Morphology Electron tomography Device performance |
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