Abstract
We have developed a room temperature fabrication technique for hybrid bulk heterojunction solar cells based on silicon nanocrystals (Si-ncs) embedded in polythieno[3,4-b]thiophenebenzodithiophene (PTB7) and that exhibit a high open-circuit voltage exceeding 1 V. This type of device outperforms the open-circuit voltage of analogous devices based on Si-ncs within poly(hexylthiophene) (P3HT). We also demonstrate that three dimensional surface engineering of Si-ncs by microplasma processing in ethanol can be used to enhance the electronic interactions with PTB7, without using any surfactant, and increasing the power conversion efficiency.
Original language | English |
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Article number | 223904 |
Journal | Applied Physics Letters |
Volume | 100 |
Issue number | 22 |
DOIs | |
Publication status | Published - 28 May 2012 |
Funding
This work was partially supported by a NEDO Project (Japan). D.M. gratefully acknowledges the support of the JSPS Invitation Fellowship (Japan).
Keywords
- conversion efficiency
- heterojunctions
- metamaterials