Journal
ORGANIC ELECTRONICS
Volume 29, Issue -, Pages 13-21Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2015.11.018
Keywords
UV detector; NaTaO3 nanocrystals; Solution processing; Hybrid; Deep UV
Funding
- National Natural Science Foundation of China [51173159, 51373151]
- Zhejiang Province Natural Science Foundation [LR15E030001]
- Fundamental Research Funds for the Central Universities of China [2014QNA4037]
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Wide bandgap NaTaO3 nanocrystals (NaTaO3 NCs) were synthesized by a two-step hydrothermal method. The hybrid film based on the pyridine modified NaTaO3 NCs and 1, 3, 5-tri(m-pyrid-3-yl-phenyl) benzene (TmPyPB) was prepared by solution processing at room temperature. Photodetector based on the hybrid film presented selective sensitivity to UV signals with wavelength shorter than 317 nm because the bandgap wider than 4.0 eV. Under 5 mW/cm(2) 280 nm illumination through the semi-transparent Al cathode, a high ultraviolet signal-to-noise ratio of 3 orders of magnitude with response time about 200-300 ms can be achieved for the device in the case of -3 V bias. (C) 2015 Elsevier B.V. All rights reserved.
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