| Autor: |
Stephen T. Hsieh, David S. Ginger, Samson A. Jenekhe, Selvam Subramaniyan, Eric M. Janke, Cody W. Schlenker, Adam E. Colbert |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
The Journal of Physical Chemistry Letters. 4:280-284 |
| ISSN: |
1948-7185 |
| DOI: |
10.1021/jz301926u |
| Popis: |
We use photoinduced absorption (PIA) spectroscopy to investigate pathways for photocurrent generation in hybrid organic/inorganic quantum dot bulk heterojunction solar cells. We study blends of the conjugated polymer poly(2,3-bis(2-(hexyldecyl)quinoxaline-5,8-diyl-alt-N-(2-hexyldecyl)dithieno[3,2-b:2',3'-d]pyrrole) (PDTPQx-HD) with PbS quantum dots and find that positively charged polarons are formed on the conjugated polymer following selective photoexcitation of the PbS quantum dots. This result provides a direct spectroscopic fingerprint demonstrating that photoinduced hole transfer occurs from the photoexcited quantum dots to the host polymer. We compute the relative yields of long-lived holes following photoexcitation of both the polymer and quantum dot phases and estimate that more long-lived polarons are produced per photon absorbed by the polymer phase than by the quantum dot phase. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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