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X.04 - Outstanding Young Investigator Award 
Date/Time:
April 24, 2014   12:45pm - 1:30pm
 
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Second generation solar cells based on thin films of polycrystalline semiconductors promise to reduce the cost of sunlight-to-electricity conversion compared to first generation crystalline silicon. Efficient thin-film absorber materials can fulfill the multiple roles of light-absorption, charge separation, and transport of both holes and electrons out of the device. A third generation of materials, which can be processed with solution-based techniques at low-temperature, such as printing, should ultimately lead to the least expensive solar cell technology. However, most of the materials processable with the lowest cost methods usually require complex architectures of distributed heterojunctions to ionize tightly bound electron-hole pairs. This inherently introduces losses at the high density of internal material interfaces. Recently organometal halide perovskite absorbers have emerged as efficient solar cell materials, which seem to be both simple to process and promise to reach the highest efficiencies. This paradigm shift arguably represents a fourth generation of photovoltaics. Snaith will underline the motivation behind nanostructured solar cells, and show some recent advances in simultaneously controlling mesoscopic length-scale order and material crystallinity for solid-state dye-sensitized solar cells. He will then present organometal halide perovskite solar cells, which have rapidly evolved from a nanostructured solar cell to a solid thin film material, with power conversion efficiencies exceeding 16%. He will share recent results on improving and understanding perovskite solar cells, with both device-based and spectroscopic investigations, and highlight some of the reasons why these materials work so well and the future prospects.
 


 
 
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