3D Lifetime Tomography Reveals How CdCl2 Improves Recombination Throughout CdTe Solar Cells
| Autor: | Craig H. Peters, Brian E. Hardin, Eric Colegrove, Edward S. Barnard, Wyatt K. Metzger, Nicholas J. Borys, Helio R. Moutinho, Benedikt Ursprung, P. James Schuck |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
02 engineering and technology tomography 01 natural sciences Engineering Photovoltaics 0103 physical sciences General Materials Science Nanoscience & Nanotechnology two-photon 010302 applied physics business.industry Mechanical Engineering Photovoltaic system CdTe 021001 nanoscience & nanotechnology Solar energy Cadmium telluride photovoltaics photovoltaics CdCl2 Mechanics of Materials Physical Sciences Chemical Sciences Optoelectronics Grain boundary Tomography Crystallite 0210 nano-technology business Recombination Biotechnology |
| Zdroj: | Advanced materials (Deerfield Beach, Fla.), vol 29, iss 3 Barnard, ES; Ursprung, B; Colegrove, E; Moutinho, HR; Borys, NJ; Hardin, BE; et al.(2017). 3D Lifetime Tomography Reveals How CdCl2Improves Recombination Throughout CdTe Solar Cells. Advanced Materials, 29(3). doi: 10.1002/adma.201603801. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/7c75r0j0 |
| Popis: | Spatially resolved 3D carrier-lifetime maps were measured using 2P tomography to uncover carrier dynamics at buried structures in CdTe thin-films photovoltaics. When thin-film CdTe solar cells are initially deposited, we observe increased nonradiative carrier recombination at GBs throughout the 3D volume of the film, which is most pronounced in the critical junction region where small nucleation grains form at the buried CdTe/CdS interface. The data on CdTe films treated by exposure to CdCl2vapor reveal that a critical function of the treatment is to reduce surface, interface and GB recombination throughout the entirety of these polycrystalline films. The CdCl2treatment may also compensate CdTe films, making it difficult to exceed a hole density of 1015m-3and achieve higher current density and efficiency. |
| Databáze: | OpenAIRE |
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