Journal
NANO LETTERS
Volume 21, Issue 1, Pages 382-388Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c03759
Keywords
Ca2Nb3O10; UV photodetectors; two-dimensional; high performance
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Funding
- National Key R&D Program of China [2018YFA0703700, 2017YFA0204600]
- Science and Technology Commission of Shanghai Municipality [18520744600, 19520744300, 18520710800]
- National Natural Science Foundation of China [51872050]
- Ministry of Education Joint Fund for Equipment Pre-Research [6141A02033241]
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The research team successfully prepared two-dimensional perovskite Ca2Nb3O10 ultraviolet photodetectors with high performance and stability, demonstrating excellent photoelectric properties and applicability, providing valuable reference for the research of next-generation high-performance UV PDs.
We first report two-dimensional (2D) perovskite Ca2Nb3O10 ultraviolet photodetectors (UV PDs), which are prepared via a facile calcination-exfoliation method. The 2D Ca2Nb3O10 PDs demonstrate high performance at 3 V at 280 nm, high responsivity (14.94 A W-1), high detectivity (8.7 x 10 13 Jones), high spectral selectivity (R-280/R-400 = 8.84 X 10(3)), fast speed (0.08/5.6 ms), and long-term stability, exceeding those of most reported UV PDs. Furthermore, the Ca2Nb3O10 PDs integrated with poly(ethylene terephthalate) (PET) show excellent flexibility and have high linear dynamic range (96 dB). Our work provides a general strategy for searching new UV PDs based on numerous layered niobates. The Ca2Nb3O10 nanosheets may be one of the optimum semiconductor materials for next-generation high-performance UV PDs.
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