Developing new light and energy technologies
August 20, 2014
Nano-Structured Solar Cells
August 11, 2014
Energy and Sustainable Chemistry: Light Harvesting & Biocatalysis
July 14, 2014
ChemE's Tisdale receives Baker Award for undergraduate teaching
May 21, 2014
Getting More Electricity Out of Solar Cells - MIT News
May 7, 2014
Excitons observed in action for the first time
April 16, 2014
Han Solar: A Short Film on Thin Film Solar Cells
March 21, 2014
Resolution Limits of Electron-beam Lithography Pushed Towards the Atomic Scale
October 22, 2013
Fujita, Takatoshi; Joonsuk Huh,; and Aspuru-Guzik, Alan , "A Stochastic Reorganizational Bath Model for Electronic Energy Transfer" Journal of Chemical Physics, vol 140, 244103-1-244103-9 (2014).
May 15, 2014 | 2pm/36-428
NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore di Pisa
What is an Exciton?
When a chlorophyll molecule in the leaf of a plant absorbs a photon of sunlight, the solar energy is converted into an excited state of the molecule known as an exciton. The exciton then transports the energy between molecules in the leaf, and ultimately mediates the conversion of sunlight into electrical energy.
Thus, excitons are packets of energy confined within a material. They are the crucial intermediate for energy transduction in all kinds of low-cost electronic materials. Excitons also dominate the behavior of disordered synthetic nano-materials like polymers and inorganic quantum dots. Consequently, excitons control solar energy conversion in low-cost solar cells, and also light emission in organic and quantum-dot based LEDs.