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14 May 2018 Influence of Rashba splitting on carrier dynamics in organic-inorganic perovskites (Conference Presentation)
Kimberley C. Hall, Seth B. Todd, Ajan Ramachandran, Charlotte Clegg, Drew B. Riley, Ali Binai-Motlagh, Constantinos C. Stoumpos, Samuel A. March, Mercouri G. Kanatzidis, Ian G. Hill
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Proceedings Volume 10638, Ultrafast Bandgap Photonics III; 106380J (2018) https://doi.org/10.1117/12.2305640
Event: SPIE Defense + Security, 2018, Orlando, FL, United States
Abstract
The lead halide hybrid perovskites have gained considerable attention in recent years due to their stellar performance as absorber layers in solution-processed solar cells, with efficiencies recently reaching over 22 percent [1]. Owing to their large spin-orbit coupling, these materials are also of interest for spintronic applications, in which the presence of lead may be less of an impediment to their adoption [2]. Measurements of spin dynamics in bulk CH3NH3PbI3-xClx have been reported in recent years [3,4,5], the spin-dependent optical Stark effect was demonstrated in 4F-PEPI [6], and a large Rashba effect has been predicted in both bulk and 2D perovskites [2], highlighting the need for further studies of the spin-related properties of these materials. Here we report spin-dependent measurements of carrier kinetics in butylammonium methylammonium lead iodide 2D perovskite and measurements of the coherent carrier response in 3D CH3NH3PbI3. Both experiments provide direct evidence of the impact of Rashba on the carrier kinetics in these systems, further supporting the potential for developing spin-optoelectronic devices using these materials. [1] https://www.nrel.gov/pv/assets/images/efficiency_chart.jpg. [2] M. Kepenekian and J. Even, J. Phys. Chem. Lett. 8, 3362 (2017). [3] D. Giovanni et al. Nano Lett. 15, 1553 (2015). [4] C. Zhang et al. Nat. Phys. 11, 427 (2015). [5] P. Odenthal et al. Nat. Phys. 13, 894 (2017). [6] D. Giovanni et al. Science Advances 2, e1600477 (2016).
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Kimberley C. Hall, Seth B. Todd, Ajan Ramachandran, Charlotte Clegg, Drew B. Riley, Ali Binai-Motlagh, Constantinos C. Stoumpos, Samuel A. March, Mercouri G. Kanatzidis, and Ian G. Hill "Influence of Rashba splitting on carrier dynamics in organic-inorganic perovskites (Conference Presentation)", Proc. SPIE 10638, Ultrafast Bandgap Photonics III, 106380J (14 May 2018); https://doi.org/10.1117/12.2305640
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KEYWORDS
Perovskite
Carrier dynamics
Lead
3D metrology
Solar cells
Spin dynamics
Spintronics
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