期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/srep45659
关键词
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资金
- National Research Foundation of Korea (NRF) grant - Korea government (MSIP) [2016R1A2B2013629]
- SW.Contents Future Innovation Program of ETRI (Project: Transparent Transducer UX Technology)
- Future Key Technology Program by Korea Institute of Science and Technology [2E26120]
- Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea [17ZS1100] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science, ICT & Future Planning, Republic of Korea [2E26120] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016R1A2B2013629] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Core/shell (C/S)-structured upconversion nanophosphor (UCNP)-incorporated polymer waveguidebased flexible transparent displays are demonstrated. Bright green-and blue-emitting Li(Gd, Y) F-4: Yb, Er and Li(Gd, Y) F-4: Yb, Tm UCNPs are synthesized via solution chemical route. Their upconversion luminescence (UCL) intensities are enhanced by the formation of C/S structure with LiYF4 shell. The Li(Gd, Y) F-4: Yb,Er/LiYF4 and Li(Gd, Y) F-4: Yb, Tm/LiYF4 C/S UCNPs exhibit 3.3 and 2.0 times higher UCL intensities than core counterparts, respectively. In addition, NaGdF4: Yb, Tm/NaGdF4: Eu C/S UCNPs are synthesized and they show red emission via energy transfer and migration of Yb3+-> Tm3+-> Gd3+-> Eu3+. The C/S UCNPs are incorporated into bisphenol A ethoxylate diacrylate which is used as a core material of polymer waveguides. The fabricated stripe-type polymer waveguides are highly flexible and transparent (transmittance > 90% in spectral range of 443-900 nm). The polymer waveguides exhibit bright blue, green, and red luminescence, depending on the incorporated UCNPs into the polymer core, under coupling with a near infrared (NIR) laser. Moreover, patterned polymer waveguide-based display devices are fabricated by reactive ion etching process and they realize bright blue-, green-, and red-colored characters under coupling with an NIR laser.
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