Gangwar, Amit Kumar and Nagpal, Kanika and Kumar, Pawan and Singh, Nidhi and Gupta, Bipin Kumar (2019) New insight into printable europium doped yttrium borate luminescent pigment for security ink application. Journal of Applied Physics , 125 (7). 074903-074911. ISSN 0021-8979

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Counterfeiting has turned out to be a major area of concern these days and is becoming a serious problem worldwide. Modern technological advances have made counterfeiting of sophisticated products easy. Therefore, it is essential to search new luminescent materials to combat counterfeiting. Herein, we report that a highly luminescent YBO3:Eu3+ phosphor was synthesized by the sol-gel technique, which can be scaled up to 1 kg in a single batch at the laboratory level. This highly luminescent boron based YBO3:Eu3+ phosphor is optically active and is structurally and chemically stable. It has a particle size of similar to 110 +/- 10 nm, which provides a strong orange-red emission at 591 nm upon 245 nm excitation wavelength and is also excitable in the range of 280-480 nm excitation wavelengths. The structural/microstructural and photoluminescence (PL) behaviors were characterized by scanning electron microscopy, transmission electron microscopy/high-resolution transmission electron microscopy, and fluorescent spectroscopy. Furthermore, this phosphor was used to design luminescent security ink with a commercially available polyvinyl chloride gold medium for printing of security codes as investigated by photoluminescence (PL) mapping instruments. Thus, this facile method to synthesize a low-cost YBO3:Eu3+ phosphor based security ink offers a non-replicable security code for printing that can be easy to detect but is difficult to counterfeit. Published under license by AIP Publishing

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Institute of Physics.
Subjects: Applied Physics/Condensed Matter
Depositing User: Mr. Yogesh Joshi
Date Deposited: 31 Dec 2020 11:25
Last Modified: 31 Dec 2020 11:25

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