Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 7, Pages 4789-4794Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b12262
Keywords
ferroelectric oxide; luminescence modulation; fatigue resistance; photochromism; reversibility; photonic storage
Funding
- Natural Science Foundation of China [51562030, 51462028]
- Natural Science Foundation of Inner Mongolia [2015BS0503, 2014MS0522]
- Research Fund for Higher Education of Inner Mongolia [NJZZ14158]
- Young Academic Core Program of Inner Mongolia University of Science and Technology [2015QNGG04]
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A luminescence ferroelectric oxide, Na0.5Bi2.5Nb2O9 (NBN), system with bismuth layer structure introduced by lanthanide ion (Er3+) has been demonstrated to exhibit reversible, high-contrast luminescence modulation (95%) and excellent fatigue resistance based on visible-light-driven photochromism (407 nm or sunlight). The coloration and decoloration process can be effectively read out by dual modes, upconversion and downshifting, and reversibly converted between green and dark gray by alternating visible light or sunlight irradiation and thermal stimulus. The luminescence modulation degree upon photochromic reactions is strongly dependent upon irradiation light wavelength and irradiation time. After undergoing several cycles, there are no significant degradations, showing high reversibility. Considering its high-contrast photoswitchable luminescence feature and intrinsic ferroelectricity of NBN host, NBN-based multifunctional materials can be suggested as a promising candidate for new potentials in photonic storage and optoelectronic multifunctional devices.
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