Analysis of optical properties and mechanism of photoluminescence enhancement of quantum dot - ferroelectric liquid crystal composite


  • Tripti Vimal University of Lucknow
  • Dharmendra Pratap Singh University of Lucknow
  • Kaushlendra Agrahari University of Lucknow
  • Atul Srivastava University of Lucknow
  • Rajiv Manohar University of Lucknow



ZnS QDs (Quantum Dots) were dispersed in FLC mixture (SCE4). The dispersion of QDs in FLC causes enhanced Photoluminescence that can be attributed to the high molecular orderning of the composite system induced by QDs. FWHM (full width half maxima) values of peaks reveals that the presence of QDs in FLC material faours the NB (near band) emissions. The POM (Polarizing Optical Microscope) images confirms the change in the alignment of FLC molecules after the dispersion of QDs.

Full Text: PDF

  1. S.W. Lee, C. Mao, C.E. Flynn, A.M. Belcher, "Ordering of Quantum Dots Using Genetically Engineered Viruses", Science 3, 892 (2002). CrossRef
  2. M. Tamborra, M. Striccoli, R. Comparelli, M.L. Curri, A. Petrella, A. Agostiano, "Optical properties of hybrid composites based on highly luminescent CdS nanocrystals in polymer", Nanotechn. 15(4), S240 (2004). CrossRef
  3. E. Kikuchi, S. Kitada, A. Ohno, S. Aramaki, S. Maenosono, "Solution-processed polymer-free photovoltaic devices consisting of PbSe colloidal quantum dots and tetrabenzoporphyrins", Appl. Phys. Lett. 92, 173307 (2008). CrossRef
  4. T. Joshi, A. Kumar, J. Prakash, A.M. Biradar, "Low power operation of ferroelectric liquid crystal system dispersed with zinc oxide nanoparticles", Appl. Phys. Lett. 96, 253109 (2010). CrossRef
  5. S. K. Gupta, D.P. Singh, P.K. Tripathi, R. Manohar, M. Varia, L.K. Sagar, S. Kumar, "CdSe quantum dot-dispersed DOBAMBC: an electro-optical study", Liq. Cryst. 40, 528 (2013). CrossRef
  6. A.K. Kole, C.S. Tiwary, P. Kumbhakar, "Room temperature synthesis of Mn2+ doped ZnS d-dots and observation of tunable dual emission: Effects of doping concentration, temperature, and ultraviolet light illumination", J. Appl. Phys. 113, 114308 (2013). CrossRef
  7. H. Qi, T. Hegmann, "Multiple Alignment Modes for Nematic Liquid Crystals Doped with Alkylthiol-Capped Gold Nanoparticles", ACS Appl. Mater. Interfaces 1, 1731 (2009). CrossRef
  8. E. Mohagheghpour, M. Rabiee, F. Moztarzadeh, M. Tahriri, "Effect of manganese (Mn) doping on the optical properties of zinc sulfide (ZnS) semiconductor nanocrystals", J. Ceramic Proc. Research 11(2), 144 (2010). DirectLink
  9. P. Goel, M. Arora, "Mechanism of photoluminescence enhancement and quenching in Nd2O3 nanoparticles?ferroelectric liquid crystal nanocomposites", RSC Adv. 5, 14974 (2015). CrossRef
  10. I.A. Ostapenko, G. Honig, C. Kindel, S. Rodt, A.Strittmatter, A. Hoffmann, D. Bimberg, "Large internal dipole moment in InGaN/GaN quantum dots", Appl. Phys. Lett. 97, 063103 (2010). CrossRef
  11. A. Kumar, J. Prakash, A.D. Deshmukh, D. Haranath, P. Silotia, A.M. Biradar, "Enhancing the photoluminescence of ferroelectric liquid crystal by doping with ZnS quantum dots", Appl. Phys. Lett. 100, 134101 (2012). CrossRef
  12. A. Kumar, S. Tripathi, A.D. Deshmukh, D. Haranath, P. Singh, A.M. Biradar, "Time evolution photoluminescence studies of quantum dot doped ferroelectric liquid crystals", J. Phys. D: Appl. Phys. 46, 195302 (2013). CrossRef
  13. D.P. Singh, S.K. Gupta, A. Srivastava, R. Manohar, "The phenomenon of induced photoluminescence in ferroelectric mesophase", J. Luminescence 139, 60 (2013). CrossRef
  14. O. Lupan, S. Shishiyanu, V. Ursaki, H. Khallaf, L. Chow et al., "Synthesis of nanostructured Al-doped zinc oxide films on Si for solar cells applications", Solar Energy Materials & Solar Cells 93, 1417 (2009). CrossRef
  15. W.K. Bae, M.K. Nam, K. Char, S. Lee, "Gram-Scale One-Pot Synthesis of Highly Luminescent Blue Emitting Cd1?xZnxS/ZnS Nanocrystals", Chem. Mater. 20, 5307 (2008). CrossRef

Author Biographies

Tripti Vimal, University of Lucknow

Junior Research FellowPhysics DepartmentUniversity of LucknowLucknow

Dharmendra Pratap Singh, University of Lucknow

Senior Research FellowPhysics DepartmentUniversity of LucknowLucknow

Kaushlendra Agrahari, University of Lucknow

Junior Research FellowPhysics DepartmentUniversity of LucknowLucknow

Atul Srivastava, University of Lucknow

Assistant Professor

Physics Department

University of LucknowLucknow

Rajiv Manohar, University of Lucknow

ProfessorPhysics DepartmentUniversity of LucknowLucknow




How to Cite

T. Vimal, D. P. Singh, K. Agrahari, A. Srivastava, and R. Manohar, “Analysis of optical properties and mechanism of photoluminescence enhancement of quantum dot - ferroelectric liquid crystal composite”, Photonics Lett. Pol., vol. 8, no. 1, pp. pp. 23–25, Mar. 2016.