Dr. Samuel Mao is a career staff scientist of Lawrence Berkeley National Laboratory and an adjunct professor at the college of engineering of the University of California at Berkeley.

Lighting represents one-fifth of the electricity consumption. The U.S. Department of Energy has set an ambitious goal to develop advanced solid-state lighting technologies that, compared to conventional lighting approaches, are much more energy efficient, longer lasting, and cost competitive.

One of the primary energy efficient solid-state lighting technologies is based on organic light-emitting diodes (OLEDs), which differ fundamentally from today’s incandescent and fluorescent devices. Although significant progress has been made since the invention of OLEDs some twenty years ago, the technology has yet to reach the full potential of solid-state lighting.

In this talk, challenges involved in OLED development will be identified and experiments exploring high efficiency OLEDs will be discussed. In particular, OLEDs incorporated with micro- and nano-structures for enhanced charge injection and light extraction have demonstrated significantly improved performance. A nanoscale organic-inorganic hybrid approach based on semiconducting quantum dot-polymer composites will also be examined.

The talk will conclude with a brief introduction of a suite of other energy technologies that the speaker is currently studying.

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