Effect of metal oxide morphology on electron injection from CdSe quantum dots to ZnO
| Autor: | Mahmoud S. Abd El-sadek, Mohamed Abdellah, Karel Žídek, Kaibo Zheng, Pavel Chábera, Tõnu Pullerits |
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| Rok vydání: | 2013 |
| Předmět: |
Permittivity
Materials science Physics and Astronomy (miscellaneous) Absorption spectroscopy business.industry Oxide Nanowire Nanoparticle Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Acceptor Marcus theory Condensed Matter::Materials Science chemistry.chemical_compound chemistry Quantum dot Optoelectronics Physics::Chemical Physics business |
| Zdroj: | Applied Physics Letters. 102:163119 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | Performance of quantum dot sensitized solar cells relies on a rapid electron injection from quantum dot to metal oxide. We studied the injection process in CdSe-ZnO system by ultrafast time-resolved absorption spectroscopy for two types of acceptor morphologies—nanowires and nanoparticles' films. Based on comparison between experimental data and Marcus theory, we demonstrate that the acceptor morphology has a significant impact on electron injection due to (i) change in material permittivity and (ii) different density of the band-edge states. The results open a reference to improve injection efficiency in quantum dot-metal oxide system by selection of the acceptor morphology. |
| Databáze: | OpenAIRE |
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