II–IV–V2 and III–III–V2 Polytypes as Light Absorbers for Single Junction and Tandem Photovoltaic Devices
| Autor: | Mohnish Pandey, Korina Kuhar, Karsten Wedel Jacobsen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Tandem Band gap business.industry Mineralogy 02 engineering and technology Electronic structure Nitride engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy 0103 physical sciences engineering Optoelectronics Charge carrier Chemical stability Kesterite Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology business Wurtzite crystal structure |
| Zdroj: | The Journal of Physical Chemistry C. 121:17780-17786 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Recent experiments on II–IV–V2 type nitrides and phosphides have shown that these materials are potential candidates as photovoltaic absorbers. The materials space for such light absorbers can be expanded by elemental substitution of the different species, and thanks to the small energy difference of the polymorphs, the space can be extended by tuning the atomic structure as well. Using electronic structure calculations, we explore chalcopyrite, kesterite, and wurtzite polymorphs of II–IV–V2 and III–III–V2 materials for light absorption especially in the visible range. Based on the thermodynamic stability, band gap, and charge carrier effective masses, we discuss the posssibility for the materials containing nontoxic elements to act as PV absorbers. Additionally, the systematic mapping of the materials space provides trends in thermodynamic and electronic properties which can be exploited further to tune these properties via elemental substitution and/or alloying. |
| Databáze: | OpenAIRE |
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