Plasmonic resonance instigated enhanced photoluminescence in quantum dot dispersed nematic liquid crystal

ABSTRACT

In the present investigation, the optical property of the nematic sample p-methoxybenzylidene p-decylaniline, dispersed with SiO₂ quantum dot (QD), has been reported. Enhanced luminescence has been observed from nematic-QD composites. Surface plasmonic effect along with QD exciton has been highlighted to discuss the observed intensification in photoluminescence. The intensified photoemission from the nematic composites can also be inferred from improved orientational behaviour of the liquid crystal molecules due to dispersion of QDs. Variation in the intensity of photoabsorption can be harnessed for development of luminescent display devices and optical parameter-driven scientific applications.

Graphical Abstract

KEYWORDS:

• Nematic liquid crystal
• quantum dot
• photoluminescence
• surface plasmonic effect

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

Author A Roy is sincerely thankful to UGC [F-25-1/2014-2015/7-177/2007 BSR], New Delhi, for providing financial assistance in the form of UGC-BSR Fellowship. R Manohar is thankful to UGC for ‘MID CAREER AWARD’. Authors are also thankful to the APJ Abdul Kalam Centre for Innovation for experimental facilities.