Now showing items 1-12 of 12

    • Effect of shell thickness on small-molecule solar cells enhanced by dual plasmonic gold-silica nanorods 

      Xu, X.; Du, Q.; Peng, B.; Xiong, Q.; Hong, L.; Demir, Hilmi Volkan; Wong, T. K. S.; Kyaw, A. K. K.; Sun, X. W. (AIP Publishing, 2014-09-19)
      Chemically synthesized gold (Au)-silica nanorods with shell thickness of 0 nm-10 nm were incorporated into the bulk heterojunction of a small-molecule organic solar cell. At optimal (1 wt. %) concentration, Au-silica ...
    • Enhanced efficiency of solution-processed small-molecule solar cells upon incorporation of gold nanospheres and nanorods into organic layers 

      Xu, X.; Kyaw, A. K. K.; Peng, B.; Du, Q.; Hong, L.; Demir, Hilmi Volkan; Wong, T. K. S.; Xiong, Q.; Sun, X. W. (Royal Society of Chemistry, 2014)
      The significantly enhanced performance upon incorporation of Au nanoparticles in solution-processed small-molecule solar cells is demonstrated. Simultaneously incorporating Au nanospheres into the hole transport layer and ...
    • Excitonics of semiconductor quantum dots and wires for lighting and displays 

      Guzelturk, B.; Martinez, P. L. H.; Zhang, Q.; Xiong, Q.; Sun, H.; Sun, X. W.; Govorov, A. O.; Demir, Hilmi Volkan (Wiley-VCH Verlag, 2013)
      In the past two decades, semiconductor quantum dots and wires have developed into new, promising classes of materials for next-generation lighting and display systems due to their superior optical properties. In particular, ...
    • High brightness formamidinium lead bromide perovskite nanocrystal light emitting devices 

      Perumal, A.; Shendre, S.; Li, M.; Tay, Y. K. E.; Sharma, V. K.; Chen, S.; Wei, Z.; Liu, Q.; Gao, Y.; Buenconsejo, P. J. S.; Tan S.T.; Gan, C. L.; Xiong, Q.; Sum, T. C.; Demir, Hilmi Volkan (Nature Publishing Group, 2016)
      Formamidinium lead halide (FAPbX3) has attracted greater attention and is more prominent recently in photovoltaic devices due to its broad absorption and higher thermal stability in comparison to more popular methylammonium ...
    • High-efficiency light-emitting diodes of organometal halide perovskite amorphous nanoparticles 

      Xing, J.; Yan, F.; Zhao Y.; Chen, S.; Yu, H.; Zhang, Q.; Zeng, R.; Demir, Hilmi Volkan; Sun, X.; Huan, A.; Xiong, Q. (American Chemical Society, 2016)
      Organometal halide perovskite has recently emerged as a very promising family of materials with augmented performance in electronic and optoelectronic applications including photovoltaic devices, photodetectors, and ...
    • Highly Efficient Visible Colloidal Lead-Halide Perovskite Nanocrystal Light-Emitting Diodes 

      Yan, F.; Xing, J.; Xing, G.; Quan, L.; Tan S.T.; Zhao, J.; Su, R.; Zhang, L.; Chen, S.; Zhao Y.; Huan, A.; Sargent, E. H.; Xiong, Q.; Demir, Hilmi Volkan (American Chemical Society, 2018)
      Lead-halide perovskites have been attracting attention for potential use in solid-state lighting. Following the footsteps of solar cells, the field of perovskite light-emitting diodes (PeLEDs) has been growing rapidly. ...
    • Influence of gold-silica nanoparticles on the performance of small-molecule bulk heterojunction solar cells 

      Xu, X.; Kyaw, A. K. K.; Peng, B.; Xiong, Q.; Demir, Hilmi Volkan; Wang Y.; Wong, T. K. S.; Sun, X. W. (Elsevier BV * North-Holland, 2015)
      Light trapping by gold (Au)-silica nanospheres and nanorods embedded in the active layer of small-molecule (SM) organic solar cell has been systematically compared. Nanorod significantly outperforms nanosphere because of ...
    • Observation of selective plasmon-exciton coupling in nonradiative energy transfer: donor-selective versus acceptor-selective plexcitons 

      Ozel, T.; Hernandez-Martinez, P. L.; Mutlugun, E.; Akin, O.; Nizamoglu, S.; Ozel, I. O.; Zhang, Q.; Xiong, Q.; Demir, Hilmi Volkan (American Chemical Society, 2013-06)
      We report selectively plasmon-mediated nonradiative energy transfer between quantum dot (QD) emitters interacting with each other via Forster-type resonance energy transfer (FRET) under controlled plasmon coupling either ...
    • Quantum dots on vertically aligned gold nanorod monolayer: plasmon enhanced fluorescence 

      Peng, B.; Li, Z.; Mutlugun, E.; Martinez, P. L. H.; Li, D.; Zhang, Q.; Gao, Y.; Demir, Hilmi Volkan; Xiong, Q. (Royal Society of Chemistry, 2014)
      CTAB-coated Au nanorods were directly self-assembled into a vertically aligned monolayer with highly uniform hot spots through a simple but robust approach. By coupling with CdSe/ZnS quantum dots, a maximum enhancement of ...
    • Study of exciton transfer in dense quantum dot nanocomposites 

      Guzelturk, B.; Hernandez-Martinez, P. L.; Sharma, V. K.; Coskun, Y.; Ibrahimova, V.; Tuncel, D.; Govorov, A. O.; Sun, X. W.; Xiong, Q.; Demir, Hilmi Volkan (Royal Society of Chemistry, 2014)
      Nanocomposites of colloidal quantum dots (QDs) integrated into conjugated polymers (CPs) are key to hybrid optoelectronics, where engineering the excitonic interactions at the nanoscale is crucial. For such excitonic ...
    • Transition metal oxides on organic semiconductors 

      Zhao Y.; Zhang, J.; Liu, S.; Gao, Y.; Yang, X.; Leck K.S.; Abiyasa, A. P.; Divayana, Y.; Mutlugun, E.; Tan S.T.; Xiong, Q.; Demir, Hilmi Volkan; Sun, X. W. (Elsevier BV, 2014-04)
      Transition metal oxides (TMOs) on organic semiconductors (OSs) structure has been widely used in inverted organic optoelectronic devices, including inverted organic light-emitting diodes (OLEDs) and inverted organic solar ...
    • Vertically aligned gold nanorod monolayer on arbitrary substrates: self-assembly and femtomolar detection of food contaminants 

      Peng, B.; Li, G.; Li, D.; Dodson, S.; Zhang, Q.; Zhang, J.; Lee, Y. H.; Demir, Hilmi Volkan; Ling, X. Y.; Xiong, Q. (American Chemical Society, 2013)
      Public attention to the food scandals raises an urgent need to develop effective and reliable methods to detect food contaminants. The current prevailing detections are primarily based upon liquid chromatography, mass ...