Coloquio del 05/10/2012

Mapping fast electrons in semiconductors:

a spectroscopic tool for understanding solar cells

Ryan Smith

Lawrence Berkeley National Laboratory

Lugar:

Auditorio de Física PUCP

(Av. Universitaria cdra. 18, San Miguel, Lima)

Fecha y hora:

Viernes 05/10/2012, 4:00 p.m.

In solar cell materials, what happens on extremely fast timescales is important to understanding how the device functions, and how we can make it better. We capture electron dynamics by mixing several short laser pulses in a sample, causing light to be re-emitted. By measuring this light, we can create a map that gives a more detailed picture of how electrons are moving around when a photon from the Sun hits a solar cell. With this spectroscopic tool, we aim to uncover the essential physics behind creating electrons in a material and also getting them out to generate an electrical current. (Click aquí para ver el afiche.)

Ingreso libre. Habrá café y galletas.

Informes: coloquios@fisica.pucp.edu.pe