Distribution and Charge State of Iron Impurities in Intentionally Contaminated Lead Halide Perovskites
| Autor: | Ashley E. Morishige, Zhonghou Cai, Juan-Pablo Correa-Baena, Tonio Buonassisi, Erin E. Looney, Barry Lai, Jeremy R. Poindexter, Sarah Wieghold, Mallory A. Jensen, Amanda Youssef, Volker Rose |
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| Přispěvatelé: | Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Mechanical Engineering, Poindexter, Jeremy Roger, Jensen, Mallory Ann, Morishige, Ashley Elizabeth, Looney, Erin Elizabeth, Youssef, Amanda, Correa-Baena, Juan-Pablo, Wieghold, Sarah, Buonassisi, Anthony |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Halide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Semiconductor Impurity Chemical physics Degradation (geology) Spontaneous emission Electrical and Electronic Engineering 0210 nano-technology business Absorption (electromagnetic radiation) Recombination Perovskite (structure) |
| Zdroj: | Other repository |
| ISSN: | 2156-3403 2156-3381 |
| Popis: | Impurity contamination in thin-film solar cells remains an uncertain risk due to the little-known impact of impurities on recombination. Building upon previous work, in which we intentionally contaminated lead halide perovskite (LHP) solar cells with iron, we further examine the distribution and charge state of iron-induced defects in LHP films using synchrotron-based X-ray techniques. X-ray absorption measurements suggest that iron-rich regions, which form among iron feedstock concentrations that exceed 100 ppm, most closely resemble the chemistry of Fe2O3. Iron distributed within the bulk may form a mix of Fe2+and Fe3+, the latter of which is not expected to be recombination active, potentially allowing LHPs to incorporate more iron than traditional semiconductors. X-ray beam induced current measurements show little correlation between the presence of iron-rich regions and charge collection, which further suggests low recombination activity at these sites. These results further elucidate the recombination behavior caused by iron incorporation in LHP films, revealing insight into how inhomogeneous incorporation of impurities may mitigate photovoltaic performance degradation. National Science Foundation (U.S.). Materials Research Science and Engineering Centers (Program) (award number DMR-1419807) United States. Department of Energy. Office of Science User Facility (Contract No. DE-AC02-06CH11357) National Science Foundation (U.S.) (NSF EECS Award No. 1541959) Martin Family Society of Fellows for Sustainability National Science Foundation (U.S.). Graduate Research Fellowship (Grant No. 1122374) National Science Foundation (U.S.). (CA No. EEC-1041895) |
| Databáze: | OpenAIRE |
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