Size-Dependent Optical and Electrochemical Energy Gaps Comparison of CdSe Nanolusters
dc.contributor.author | Teunis, Meghan B. | |
dc.contributor.author | Lawrence, Katie N. | |
dc.contributor.author | Dolai, Sukanta | |
dc.date.accessioned | 2015-09-08T17:39:57Z | |
dc.date.available | 2015-09-08T17:39:57Z | |
dc.date.issued | 2013-04-05 | |
dc.description | poster abstract | en_US |
dc.description.abstract | The size-dependent optical and electronic properties of semiconductor nanocrystals have made them the focus of much research including the designing of photovoltaic devices and photocatalysts. These properties occur as a result of the phenomenon called quantum confinement. To improve the device efficiency it is important to have a better understanding of their size dependent electrochemical properties. Herein we demonstrate for the first time, a comparison of the size dependent optical properties and electrochemical energy gaps of poly(ethylene glycol) thiolate-protected ultra-small CdSe nanoclusters. The electrochemical energy gaps for various sized nanoclusters were determined from cyclic and differential pulse voltammetry in organic solvent/electrolyte medium, where large, moleculelike HOMO-LUMO energy gaps were observed. It was also found that a significant amount of charging energy is involved in the electrochemical energy gap. The effect of the thickness of the surface-pasivating ligands on the HOMO-LUMO energy gap is demonstrated and a quantized double layer (QDL) charging model presented. | en_US |
dc.identifier.citation | Teunis, Meghan B., Katie N. Lawrence, and Sukanta Dolai. (2013, April 5). Size-Dependent Optical and Electrochemical Energy Gaps Comparison of CdSe Nanolusters. Poster session presented at IUPUI Research Day 2013, Indianapolis, Indiana. | en_US |
dc.identifier.uri | https://hdl.handle.net/1805/6779 | |
dc.language.iso | en_US | en_US |
dc.publisher | Office of the Vice Chancellor for Research | en_US |
dc.subject | semiconductor nanocrystals | en_US |
dc.subject | photovoltaic devices | en_US |
dc.subject | photocatalysts | en_US |
dc.subject | quantum confinement | en_US |
dc.subject | size dependent electrochemical properties | en_US |
dc.subject | size dependent optical properties | en_US |
dc.subject | electrochemical energy gaps | en_US |
dc.subject | poly(ethylene glycol) thiolate-protected ultra-small CdSe nanoclusters | en_US |
dc.title | Size-Dependent Optical and Electrochemical Energy Gaps Comparison of CdSe Nanolusters | en_US |
dc.type | Presentation | en_US |