DocumentCode :
2119993
Title :
Designing photonic materials for effective bandgap modification and optical concentration in photovoltaics
Author :
Munday, Jeremy N.
Author_Institution :
Department of Electrical and Computer Engineering at the University of Maryland, College Park, 20742 USA
fYear :
2012
fDate :
3-8 June 2012
Firstpage :
1
Lastpage :
4
Abstract :
The limiting efficiency for photovoltaic energy conversion based on a semiconductor pn-junction is typically determined using the method of detailed balance put forth by Shockley and Queisser. Here we describe how this theory is altered in the presence of a photonic structure that is capable of modifying the absorption and emission of photons. By incorporating specifically designed photonic structures, higher maximum efficiencies can be achieved for low bandgap materials by restricting the absorption and emission of above bandgap photons. Similarly, restriction of the emission angle leads to increased optical concentration. We consider how both of these effects are modified in the presence of a non-ideal photonic structure.
Keywords :
Absorption; Materials; Photonic band gap; Radiative recombination; Bandgap Engineering; Detailed Balance; Photonic Crystal; Shockley Queisser limit;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), Volume 2, 2012 IEEE 38th
Conference_Location :
Austin, TX, USA
Type :
conf
DOI :
10.1109/PVSC-Vol2.2012.6656708
Filename :
6656708
Link To Document :
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