Journal
NANO LETTERS
Volume 21, Issue 11, Pages 4838-4844Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c01510
Keywords
Upconversion nanophosphors; core/multishell structures; full-color tuning; orthogonal upconversion luminescence; transparent displays
Categories
Funding
- Materials Innovation Project - National Research Foundation of Korea [NRF-2020M3H4A3081791]
- Korea Institute of Science and Technology [2E31181, 2 V08370]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry, and Energy (MOTIE) [20193091010240]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20193091010240] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, rare-earth ion-doped upconversion nanophosphors capable of full-color tunability were reported. These nanophosphors emit blue, green, and red light under different wavelengths, achieving a wide color gamut with rich colors.
Here, excitation orthogonalized red/green/blue upconversion luminescence (UCL)-based full-color tunable rare-earth (RE) ion-doped upconversion nanophosphors (UCNPs) are reported. The LiREF4-based core/sextuple-shell (C/6S) UCNPs are synthesized, and they consist of a blue-emitting core, green-emitting inner shell, and red-emitting outer shell, with inert intermediate and outermost shells. The synthesized C/6S UCNPs emit blue, green, and red light under 980, 800, and 1532 nm, respectively. Importantly, by combining incident near-infrared (NIR) light with various wavelengths (800, 980, and 1532 nm), full-color UCL including blue, cyan, green, yellow, orange, red, purple, and white UCL is achieved from the single C/6S UCNP composition. The color gamut obtained from the C/6S UCNPs shows 101.6% of the sRGB standard color gamut. Furthermore, transparent C/6S UCNP-polydimethylsiloxane (PDMS) composite is prepared. Full-color display realized in the transparent C/6S UCNP-PDMS composite indicates the feasibility of constructing the C/6S UCNP-based three-dimensional volumetric displays with wide color gamut.
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