authors |
Martinez, ED; Brites, CDS; Carlos, LD; Garcia-Flores, AF; Urbano, RR; Rettori, C |
nationality |
International |
journal |
ADVANCED FUNCTIONAL MATERIALS |
author keywords |
electrothermal control; high thermal sensitivity; optoelectronic devices; silver nanowires; upconversion nanoparticles |
keywords |
UP-CONVERSION LUMINESCENCE; TEMPERATURE-DEPENDENCE; NANOWIRE NETWORKS; NANOPARTICLES; SHELL; CORE; ER3+; PHASE; STATE |
abstract |
The hasty progress in smart, portable, flexible, and transparent integrated electronics and optoelectronics is currently one of the driving forces in nanoscience and nanotechnology. A promising approach is the combination of transparent conducting electrode materials (e.g., silver nanowires, AgNWs) and upconverting nanoparticles (UCNPs). Here, electrochromic devices based on transparent nanocomposite films of poly(methyl methacrylate) and AgNWs covered by UCNPs of different sizes and compositions are developed. By combining the electrical control of the heat dissipation in AgNW networks with size-dependent thermal properties of UCNPs, tunable electrochromic transparent devices covering a broad range of the chromatic diagrams are fabricated. As illustrative examples, devices mixing large-sized (>70 nm) beta-NaYF4:Yb,Ln and small-sized (<15 nm) NaGdF4:Yb,Ln@NaYF4 core@shell UCNPs (Ln = Tm, Er, Ce/Ho) are presented, permitting to monitor the temperature-dependent emission of the particles by the intensity ratio of the Er3+ 2H11/2 and S-4(3/2) -> I-4(15/2) emission lines, while externally controlling the current flow in the AgNW network. Moreover, by defining a new thermometric parameter involving the intensity ratio of transitions of large- and small-sized UCNPs, a relative thermal sensitivity of 5.88% K-1 (at 339 K) is obtained, a sixfold improvement over the values reported so far. |
publisher |
WILEY-V C H VERLAG GMBH |
issn |
1616-301X |
isbn |
1616-3028 |
year published |
2019 |
volume |
29 |
issue |
8 |
digital object identifier (doi) |
10.1002/adfm.201807758 |
web of science category |
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter |
subject category |
Chemistry; Science & Technology - Other Topics; Materials Science; Physics |
unique article identifier |
WOS:000459826500020
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
16.836 |
5 year journal impact factor |
15.722 |
category normalized journal impact factor percentile |
95.322 |
dimensions (citation analysis):
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altmetrics (social interaction):
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