Are curtains drawing to a close? Glass that switches from transparent to opaque may soon replace the need for blinds
August 31, 2016
Self-shading window shifts from transparent to opaque with new tech
August 11, 2016
Nanocrystal self-assembly sheds its secrets - A new approach gives a real-time look at how the complex structures form.
March 21, 2016
Four MIT faculty win Presidential Early Career Awards
February 19, 2016
President Obama Honors Extraordinary Early-Career Scientists
February 18, 2016
Zhibo Zhao one of 2015 MRS-Boston best posters winners.
December 3, 2015
Dincă Receives the 2015 Dream Chemistry Award
December 3, 2015
New Perovskite Seminar Series
September 15, 2015
Sheberla, Dennis; Bachman, John C.; Elias, Joseph S.; Sun, Cheng-Jun; Shao-Horn, Yang; and Dinca, Mircea, "Conductive MOF electrodes for stable supercapacitors with high areal capacitance Nat. Mater, advance online publication, (2016). [DOI: 10.1038/nmat4766]" Nat. Mater, advance online publication, (2016). [DOI: 10.1038/nmat4766] .
November 2, 2016 | 3:30 PM/ 36-462
Massachusetts Institute of Technology, Department of Mechanical Engineering
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.