Developing Nanomaterials for High Radiation Applications
May 24, 2017
Turning the Infrared into the Visible
May 8, 2017
February 27, 2017
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
Wu, Mengfei; Jean, Joel; Bulovic, Vladimir; and Baldo, Marc. A., "Interference-enhanced Infrared-to-visible upconversion in solid-state thin films sensitized by colloidal nanocrystals" Appl. Phys. Lett., 110, 211101 ( May 2017) DOI: 10.1063/1.4984136.
September 20, 2017 |
To be announced
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.