Quaternary alkylammonium salt incorporated 2D/3D mixed halide perovskite with highly enhanced photoluminescence and arrested iodide/bromide phase segregation
A mixed-halide (I/Br) 2D/3D perovskite is formed by incorporating bromide via quaternary alkylammonium salt and iodide via methylammonium iodide. The X-ray diffraction analysis reveals the 2D/3D mixed constitution, with both components having mixed halide stoichiometry. Importantly, this tetrabutyla...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2018-08-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.5042449 |
| Summary: | A mixed-halide (I/Br) 2D/3D perovskite is formed by incorporating bromide via quaternary alkylammonium salt and iodide via methylammonium iodide. The X-ray diffraction analysis reveals the 2D/3D mixed constitution, with both components having mixed halide stoichiometry. Importantly, this tetrabutylammonium incorporated material not only exhibits almost two orders of magnitude enhancement of photoluminescence intensity but concurrently a higher photo-stability (at the desirable bandgap of 1.77 eV) than the pure 3D mixed halide case. Moreover, a significant increase (from 8.8 ns to 63 ns) is observed in the lifetime of the photo-generated carriers in the mixed halide 2D/3D material. |
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| ISSN: | 2166-532X |