Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites
Perovskite solar cells with record power conversion efficiency are fabricated by alloying both hybrid and fully inorganic compounds. While the basic electronic properties of the hybrid perovskites are now well understood, key electronic parameters for solar cell performance, such as the exciton bind...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
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American Chemical Society
2017
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| _version_ | 1826292119649648640 |
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| author | Yang, Z Surrente, A Galkowski, K Miyata, A Portugall, O Sutton, R Haghighirad, A Snaith, H Maude, D Plochocka, P Nicholas, R |
| author_facet | Yang, Z Surrente, A Galkowski, K Miyata, A Portugall, O Sutton, R Haghighirad, A Snaith, H Maude, D Plochocka, P Nicholas, R |
| author_sort | Yang, Z |
| collection | OXFORD |
| description | Perovskite solar cells with record power conversion efficiency are fabricated by alloying both hybrid and fully inorganic compounds. While the basic electronic properties of the hybrid perovskites are now well understood, key electronic parameters for solar cell performance, such as the exciton binding energy of fully inorganic perovskites, are still unknown. By performing magneto-transmission measurements, we determine with high accuracy the exciton binding energy and reduced mass of fully inorganic CsPbX3 perovskites (X = I, Br, and an alloy of these). The well-behaved (continuous) evolution of the band gap with temperature in the range of 4–270 K suggests that fully inorganic perovskites do not undergo structural phase transitions like their hybrid counterparts. The experimentally determined dielectric constants indicate that at low temperature, when the motion of the organic cation is frozen, the dielectric screening mechanism is essentially the same for both hybrid and inorganic perovskites and is dominated by the relative motion of atoms within the lead halide cage. |
| first_indexed | 2024-03-07T03:09:47Z |
| format | Journal article |
| id | oxford-uuid:b3c9ae5e-6997-4999-ba36-36f322d091cb |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:09:47Z |
| publishDate | 2017 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:b3c9ae5e-6997-4999-ba36-36f322d091cb2022-03-27T04:21:45ZImpact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskitesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b3c9ae5e-6997-4999-ba36-36f322d091cbSymplectic Elements at OxfordAmerican Chemical Society2017Yang, ZSurrente, AGalkowski, KMiyata, APortugall, OSutton, RHaghighirad, ASnaith, HMaude, DPlochocka, PNicholas, RPerovskite solar cells with record power conversion efficiency are fabricated by alloying both hybrid and fully inorganic compounds. While the basic electronic properties of the hybrid perovskites are now well understood, key electronic parameters for solar cell performance, such as the exciton binding energy of fully inorganic perovskites, are still unknown. By performing magneto-transmission measurements, we determine with high accuracy the exciton binding energy and reduced mass of fully inorganic CsPbX3 perovskites (X = I, Br, and an alloy of these). The well-behaved (continuous) evolution of the band gap with temperature in the range of 4–270 K suggests that fully inorganic perovskites do not undergo structural phase transitions like their hybrid counterparts. The experimentally determined dielectric constants indicate that at low temperature, when the motion of the organic cation is frozen, the dielectric screening mechanism is essentially the same for both hybrid and inorganic perovskites and is dominated by the relative motion of atoms within the lead halide cage. |
| spellingShingle | Yang, Z Surrente, A Galkowski, K Miyata, A Portugall, O Sutton, R Haghighirad, A Snaith, H Maude, D Plochocka, P Nicholas, R Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
| title | Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
| title_full | Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
| title_fullStr | Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
| title_full_unstemmed | Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
| title_short | Impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
| title_sort | impact of the halide cage on the electronic properties of fully inorganic cesium lead halide perovskites |
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