Abstract
Inx Ga1-x ASy Sbi1-v thermophotovoltaic (TPV) diodes were grown lattice matched to GaSb substrates by metalorganic vapor phase epitaxy in the bandgap range of EG = 0.5 to 0.6 eV. InGaAsSb TPV diodes, utilizing front-surface spectral control filters, are measured with thermal-to-electric conversion efficiency and power density (PD) of ηTPV = 19.7% and PD = 0.58 W/cm2, respectively, for a radiator temperature of Tradiotor = 950 °C, diode temperature of Tdlode = 27 °C, and diode bandgap of EG = 0.53 eV. Practical limits to TPV energy conversion efficiency are established using measured recombination coefficients and optical properties of front surface spectral control filters which for 0.53-eV InGaAsSb TPV energy conversion are ηTPV = 28% and PD = 0.85 W/cm2 at the above operating temperatures. The most severe performance limits are imposed by 1) diode open-circuit voltage (Voc) limits due to intrinsic Auger recombination and 2) parasitic photon absorption in the inactive regions of the module. Experimentally, the diode Voc is 15% below the practical limit imposed by intrinsic Auger recombination processes. Analysis of InGaAsSb diode electrical performance versus diode architecture indicates that V oc and thus efficiency are limited by extrinsic recombination processes such as through bulk defects.
| Original language | English |
|---|---|
| Pages (from-to) | 2879-2888 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Electron Devices |
| Volume | 53 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2006 |
Keywords
- Diodes
- Indium gallium arsenide antimonide
- Photovoltaic
Fingerprint
Dive into the research topics of 'Quaternary InGaAsSb thermophotovoltaic diodes'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver