April 14, 2015

Graphene speeds up light-to-electricity conversion

Highly efficient carrier heating after light absorption leads to ultrafast (<50 fs) photovoltage creation

(April 14, 2015)  The efficient conversion of light into electricity plays a crucial role in many technologies, ranging from cameras to solar cells. It also forms an essential step in data communication applications, since it allows for information carried by light to be converted into electrical information that can be processed in electrical circuits. Graphene is an excellent material for ultrafast conversion of light to electrical signals, but so far it was not known how fast graphene responds to ultrashort flashes of light.

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