5 years ago

Tuning 2D Light Upconversion Emission by Modulating Phonon Relaxation

Tuning 2D Light Upconversion Emission by Modulating Phonon Relaxation
Hyung Min Kim, Bum Jin Kim, Youngho Cho, Soo Yeong Lim, Yung Doug Suh, Chan Ryang Park, Sang Hwan Nam
NIR-to-UV/Vis upconversion phenomena have been widely applied in cutting-edge disciplines including nanomedicine, solid 3D displays, nanoscale thermometry, solar cell technology, and cryptography. However, studies on 2D upconversion structures have been rare because it is difficult to fabricate 2D film structures over a large area and a variety of emission colors. In this study, an upconversion film was prepared using pulsed laser deposition and the emission color was controlled by inducing a thermal reaction on the films. Multiple color emission was generated from upconversion films as a result of inserting high-frequency molecular OH oscillators into the film structures. Furthermore, films were modified that can be used as security codes by allowing patterns and transparency to the film. More information can be found in the Communication by Chan Ryang Park, Hyung Min Kim et al. (DOI: 10.1002/asia.201700782).

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/asia.201700952

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