PEREIRA, Mauro (2011). Microscopic approach for intersubband-based thermophotovoltaic structures in the terahertz and mid-infrared. Journal of the Optical Society of America B, 28 (8), p. 2014.
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This paper describes microscopic calculations of photocurrent generation spectra due to intersubband transitions in semiconductor heterostructures that can extract energy from photons in the THz and Mid Infrared Ranges. As expected in the mid infrared the interconduction conduction band transitions dominate the photocurrent. However, the numerical results presented here show that in the far infrared there is a range in which valence-band-based transitions dominate the photocurrent and these can be sustained under perpendicular incidence. This would lead to devices that do not need prisms and couplers in contrast with conduction-band based intersubband absorbers. Examples for different quantum well structures and different thermal source temperatures are compared and contrasted numerically. It is further demonstrated that many body effects, so far ignored in simulations of materials for photovoltaic and thermophotovoltaic applications, are shown to be of relevance for both conduction (TM Mode) and valence-band based (TE Mode) configurations.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group|
|Depositing User:||Helen Garner|
|Date Deposited:||27 Sep 2011 16:24|
|Last Modified:||29 Sep 2011 10:06|
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