Wednesday, June 22, 2011, 11:00 am — Bldg. 735 - Conf Rm B
The concept of wavelength conversion in photovoltaics consists on manipulating the incident solar spectrum using appropriate materials in order to convert photons from mismatched portions of the incident solar spectrum into photons within the wavelength range efficiently absorbed by the photovoltaic cell. One of the mechanisms of producing this manipulation of the solar spectrum is by using down-shifter materials, which absorb the blue-UV light of the solar spectrum and convert it into a radiation in the visible or the infrared that can be efficiently absorbed by the photovoltaic cell.
Eu3+:La2O3 is a good candidate to be used as a down-shifter material. The advantage of using particles of Eu3+:La2O3 with sizes < 100 nm is that they may show electrical, optical and luminescent properties more efficient than those corresponding to bulk materials. Apart from that, by using luminescent nanoparticles of lanthanide ions, one can avoid the tight size restrictions of semiconductor and metallic nanoparticles.
In this talk we will analyzed the possibilities of using Eu3+:La2O3 nanoparticles as a down-shifter material in polymer solar cells based on poly(3-hexilthiophene), P3HT. Spectroscopic and electrical characterizations of the composite formed by P3HT with Eu3+:La2O3 nanoparticles embedded in it will be discussed.
Hosted by: Chang-Yong Nam
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