Genome Technology Center

The 3rd generation of solar cells multiple excitons

Jackie Peng

With the climate impact of CO2 emissions becoming a growing concern for societies around the world, there has been increasing efforts for the development of more efficient and economical solar cells. Solar cells are classified first, second and third generations, depending on their development time, efficiency and cost. In the talk, I will introduce the traditional p-n junction solar cells which obey the theoretical Shockley-Queisser limit of 32% efficiency in extracting the solar power. Later, I will talk about the third generation solar cells that can potentially achieve 85% efficiency. The multiple excitons generation (MEG) solar cell is one type of third generation solar cell that can extract multiple electron-hole pairs from a single photon. In the talk, I will focus on the current state of technology for achieving MEG within nanocrytals, and the advantages and difficulties of incorporating the technology into working solar cells.

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