Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors
State-of-the-art optoelectronic devices based on metal-halide perovskites demand solution-processed structures with high crystallinity, controlled crystallographic orientation, and enhanced environmental stability. Formamidinium lead iodide (α-FAPbI3) possesses a suitable bandgap of 1.48 eV and enha...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2021
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| Online Access: | https://hdl.handle.net/10356/154423 |
| _version_ | 1811689495537385472 |
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| author | Chen, G. Qiu, Y. Gao, H. Zhao, Y. Feng, Jiangang Jiang, L. Wu, Y. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Chen, G. Qiu, Y. Gao, H. Zhao, Y. Feng, Jiangang Jiang, L. Wu, Y. |
| author_sort | Chen, G. |
| collection | NTU |
| description | State-of-the-art optoelectronic devices based on metal-halide perovskites demand solution-processed structures with high crystallinity, controlled crystallographic orientation, and enhanced environmental stability. Formamidinium lead iodide (α-FAPbI3) possesses a suitable bandgap of 1.48 eV and enhanced thermal stability, whereas perovskite-type polymorph (α-phase) is thermodynamically instable at ambient temperatures. Stable α-FAPbI3 perovskite 1D structure arrays with high crystallinity and ordered crystallographic orientation are developed by controlled nucleation and growth in capillary bridges. By surface functionalization with phenylethylammonium ions (PEA+), FAPbI3 wires sustain a stable α-phase after 28 day storage in the ambient environment with a relative humidity of 50%. Enhanced photoluminescence (PL) intensity and elongated PL lifetime demonstrate suppressed trap density and high crystallinity in these 1D structures, which is also reflected by the enhanced diffraction density and pure (001) crystallographic orientation in the grazing-incidence wide-angle X-ray scattering (GIWAXS) pattern. Based on these high-quality 1D structures, sensitive photodetectors are achieved with average responsivities of 5282 A W−1, average specific detectivities of more than 1.45 × 1014 Jones, and a fast response speed with a 3 dB bandwidth of 15 kHz. |
| first_indexed | 2024-10-01T05:49:01Z |
| format | Journal Article |
| id | ntu-10356/154423 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:49:01Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1544232021-12-22T06:58:20Z Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors Chen, G. Qiu, Y. Gao, H. Zhao, Y. Feng, Jiangang Jiang, L. Wu, Y. School of Physical and Mathematical Sciences Science::Physics 1D Structures α-FAPbI3 State-of-the-art optoelectronic devices based on metal-halide perovskites demand solution-processed structures with high crystallinity, controlled crystallographic orientation, and enhanced environmental stability. Formamidinium lead iodide (α-FAPbI3) possesses a suitable bandgap of 1.48 eV and enhanced thermal stability, whereas perovskite-type polymorph (α-phase) is thermodynamically instable at ambient temperatures. Stable α-FAPbI3 perovskite 1D structure arrays with high crystallinity and ordered crystallographic orientation are developed by controlled nucleation and growth in capillary bridges. By surface functionalization with phenylethylammonium ions (PEA+), FAPbI3 wires sustain a stable α-phase after 28 day storage in the ambient environment with a relative humidity of 50%. Enhanced photoluminescence (PL) intensity and elongated PL lifetime demonstrate suppressed trap density and high crystallinity in these 1D structures, which is also reflected by the enhanced diffraction density and pure (001) crystallographic orientation in the grazing-incidence wide-angle X-ray scattering (GIWAXS) pattern. Based on these high-quality 1D structures, sensitive photodetectors are achieved with average responsivities of 5282 A W−1, average specific detectivities of more than 1.45 × 1014 Jones, and a fast response speed with a 3 dB bandwidth of 15 kHz. The authors acknowledge the National Natural Science Foundation (21703268 and 21633014), the Beijing Natural Science Foundation (2182081), the Ministry of Science and Technology (MOST) of China (2017YFA0204504 and 2018YFA0208502). This work was also supported by the Academic Excellence Foundation of BUAA for Ph.D. Students. 2021-12-22T06:58:19Z 2021-12-22T06:58:19Z 2020 Journal Article Chen, G., Qiu, Y., Gao, H., Zhao, Y., Feng, J., Jiang, L. & Wu, Y. (2020). Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors. Advanced Functional Materials, 30(14), 1908894-. https://dx.doi.org/10.1002/adfm.201908894 1616-301X https://hdl.handle.net/10356/154423 10.1002/adfm.201908894 2-s2.0-85079719487 14 30 1908894 en Advanced Functional Materials © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| spellingShingle | Science::Physics 1D Structures α-FAPbI3 Chen, G. Qiu, Y. Gao, H. Zhao, Y. Feng, Jiangang Jiang, L. Wu, Y. Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors |
| title | Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors |
| title_full | Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors |
| title_fullStr | Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors |
| title_full_unstemmed | Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors |
| title_short | Air-stable highly crystalline formamidinium perovskite 1D structures for ultrasensitive photodetectors |
| title_sort | air stable highly crystalline formamidinium perovskite 1d structures for ultrasensitive photodetectors |
| topic | Science::Physics 1D Structures α-FAPbI3 |
| url | https://hdl.handle.net/10356/154423 |
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