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Inside Cover: Tuning 2D Light Upconversion Emission by Modulating Phonon Relaxation (Chem. Asian J. 16/2017)
Author(s) -
Kim Bum Jin,
Lim Soo Yeong,
Cho Youngho,
Nam Sang Hwan,
Suh Yung Doug,
Park Chan Ryang,
Kim Hyung Min
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201700952
Subject(s) - photon upconversion , materials science , optoelectronics , transparency (behavior) , thin film , laser , nanotechnology , optics , doping , physics , computer science , computer security
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. on page 2038 in Issue 16, 2017 (DOI: 10.1002/asia.201700782).