Showcasing the optical properties of monocrystalline zinc phosphide thin films as an earth-abundant photovoltaic absorber
| Autor: | Elias Z. Stutz, Mahdi Zamani, Djamshid A. Damry, Léa Buswell, Rajrupa Paul, Simon Escobar Steinvall, Jean-Baptiste Leran, Jessica L. Boland, Mirjana Dimitrievska, Anna Fontcuberta i Morral |
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| Rok vydání: | 2022 |
| Předmět: |
terahertz probe spectroscopy
010302 applied physics charge carrier density ResearchInstitutes_Networks_Beacons/photon_science_institute 02 engineering and technology Photon Science Institute 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Zinc phosphide Chemistry (miscellaneous) 0103 physical sciences photoluminescence General Materials Science 0210 nano-technology optoelectronic defects |
| Zdroj: | Stutz, E Z, Zamani, M, Damry, D, Buswell, L, Paul, R, Steinvall, S E, Leran, J-B, Boland, J, Dimitrievska, M & Fontcuberta i Morral, A 2022, ' Showcasing the optical properties of monocrystalline zinc phosphide thin films as an earth-abundant photovoltaic absorber ', Materials Advances, vol. 3, no. 2, pp. 1295-1303 . https://doi.org/10.1039/d1ma00922b |
| ISSN: | 2633-5409 |
| Popis: | Zinc phosphide, Zn3P2, is a semiconductor with a high absorption coefficient in the spectral range relevant for single junction photovoltaic applications. It is made of elements abundant in the Earth's crust, opening up a pathway for large deployment of solar cell alternatives to the silicon market. Here we provide a thorough study of the optical properties of single crystalline Zn3P2thin films grown on (100) InP by molecular beam epitaxy. The films are slightly phosphorus-rich as determined by Rutherford backscattering. We elucidate two main radiative recombination pathways: one transition at approximately 1.52 eV attributed to zone-center band-to-band electronic transitions; and a lower-energy transition observed at 1.3 eV to 1.4 eV attributed to a defect band or band tail related recombination mechanisms. We believe phosphorus interstitials are likely at the origin of this band. |
| Databáze: | OpenAIRE |
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