Front Surface Spectral Control Development for TPV Energy Conversion (a Presentation)

This paper discusses the introduction to the potential of alternative materials that provide higher temperature stability than current materials. The outline of this report is: (1) Review briefly the importance of spectral control; (2) Provide current results; (3) Introduce the temperature stability issue; (4) Describe the requirements for alternate materials and (5) Present alternative materials. The conclusions of this report are: (1) Antimony selenide has achieved the highest spectral efficiency to date; (2) Several materials expected to have higher temperature stability have been shown to be viable; (3) So far, with limited development, the performance of the these materials is lower than Antimony selenide; and (4) Additional development will be required to achieve similar or higher performance

Optical Coatings for Thermophotovoltaic Spectral Control

The efficiency of thermophotovoltaic (TPV) energy conversion is dependent on efficient spectral control. An edge pass filter (short pass) in series with a highly doped, epitaxially grown layer has achieved the highest performance of TPV spectral control. Front surface, tandem filters have achieved the highest spectral efficiency and represent the best prospect for even higher spectral efficiency for TPV energy conversion systems. Specifically, improvements in the physical vapor deposition process, identification of other materials with a high index of refraction and a low absorption coefficient, and more efficient edge filter designs could provide higher TPV spectral performance

A New Species Of Chevalia (Crustacea : Amphipoda : Corophiidae) From The Indian Ocean With Remarks On Chevalia Carpenteri And The C-Aviculae Superspecies Complex

Volume: 112Start Page: 562End Page: 57

A review of recently discovered type specimens of Bermuda amphipoda (Crustacea: Peracarida) described by B. W. Kunkel (1882-1969)

Volume: 100Start Page: 321End Page: 33

New Performance Levels for TPV Front Surface Filters

Front surface spectral control filters significantly improve the efficiency of thermophotovoltaic (TPV) converters. Tandem filter designs for 0.52 and 0.60 eV cells were fabricated. Energy and angle weighted spectral efficiencies of {approx}83% for the 0.52 eV application and {approx}76% for the 0.60 eV applications were achieved with {approx}78% angle weighted above bandgap transmission. Manufacturing demonstrations of both designs were completed with good yield. Design improvements were made using angle weighted spectral utilization and above bandgap transmission as refinement goals. Current development work addresses elimination of the plasma filter and alternate substrates

A new species of Helobdella (Hirudinida: Glossiphoniidae) from Oregon, USA

Moser, William E., Fend, Steven V., Richardson, Dennis J., Hammond, Charlotte I., Lazo-Wasem, Eric A., Govedich, Fredric R., Gullo, Bettina S. (2013): A new species of Helobdella (Hirudinida: Glossiphoniidae) from Oregon, USA. Zootaxa 3718 (3): 287-294, DOI: http://dx.doi.org/10.11646/zootaxa.3718.3.