Direct observation of the size dependence of Dexter energy transfer from polymer to small PbS quantum dots

Zhang, Yating; Xu, Zhangcheng
August 2008
Applied Physics Letters;8/25/2008, Vol. 93 Issue 8, p083106
Academic Journal
Small PbS quantum dots (QDs) with diameters ranging from 2.5 to 3 nm were synthesized directly in the conjugated polymer poly[2-methoxy-5-(2′-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) at 70 °C. To monitor the size dependence of Dexter energy transfer [D. L. Dexter, J. Chem. Phys. 21, 836 (1953)] from MEH-PPV to PbS QDs, the photoluminescence of MEH-PPV is measured for a series of samples with varying QD sizes controlled by the reaction time. A decreased transfer rate is observed for PbS QDs with a diameter of about 2.65 nm due to the minimum overlap between the emission spectrum of MEH-PPV and the 1Se-1Sh and 1Pe-1Sh transitions of PbS QDs.


Related Articles

  • Optical nanofountain: A biomimetic device that concentrates optical energy in a nanometric region. Kawazoe, Tadashi; Kobayashi, Kiyoshi; Ohtsu, Motoichi // Applied Physics Letters;3/7/2005, Vol. 86 Issue 10, p103102 

    We have proposed and demonstrated a nanophotonic device, which concentrates optical energy in a nanometric region. We call this device an “optical nanofountain,” which uses the energy transfer among quantum dots and acts like a light-harvesting photosynthetic system. We...

  • Fabrication And Characterization Of PbS Quantum Dots. Cademartiri, Ludovico; von Freymann, Georg; Kitaev, Vladimir; Ozin, Geoffrey A. // AIP Conference Proceedings;2005, Vol. 772 Issue 1, p597 

    Synthesis, structural characterization and optical properties of narrow size distribution and high photoluminescence efficiency PbS colloidal quantum dots are described. They display at least five distinguishable excitonic peaks in the absorption spectra, a half-width at half-maximum of the...

  • Energy transfer in associates of semiconductor quantum dots with tetrapyridinoporphyrazine molecules. Orlova, A. O.; Maslov, V. G.; Skaletskaya, I. E.; Baranov, A. V. // Optics & Spectroscopy;Oct2006, Vol. 101 Issue 4, p582 

    The interaction of CdSe/ZnS quantum dots (QDs) with metal-free tetrapyridinoporphyrazine (TPPA) molecules in chloroform has been investigated. It was found that, at QD concentrations lower than ∼3 × 10−7 M, QD luminescence is quenched in the presence of TPPA and characteristic...

  • Complexes of CdSe/ZnS quantum dots with chlorin E6 in nonaqueous media. Visheratina, A.; Alisova, I.; Kundelev, E.; Orlova, A.; Maslov, V.; Fedorov, A.; Baranov, A. // Optics & Spectroscopy;Nov2015, Vol. 119 Issue 5, p733 

    Complexes of semiconductor CdSe/ZnS quantum dots and molecules of chlorin e6 in dimethyl sulfoxide have been formed. Conditions of formation and spectral and luminescent properties of the complexes have been studied. The quantum yield of luminescence of chlorin e6 in the complexes has been found...

  • Combined harvester. Nathan, Stuart // Engineer (00137758);3/10/2008, Vol. 293 Issue 7743, p8 

    The article reports on the collaboration of Luke Wilson and his colleagues at Sheffield University's Department of Physics and Astronomy with the National Centre for Semiconductor Growth to study the use of nanoscale semiconductor crystals known as quantum dots as solar energy collectors in...

  • The dynamics of energy and charge transfer in lead sulfide quantum dot solids. Lingley, Zachary; Siyuan Lu; Madhukar, Anupam // Journal of Applied Physics;2014, Vol. 115 Issue 8, p1 

    We report on a systematic time-resolved photoluminescence study of the competing energy and charge transfer rates in PbS QDs of differing sizes in the same QD solid as a function of both temperature and ligand-controlled different inter-QD average separations. This complements previous studies...

  • PbS quantum-dot-doped glasses for ultrashort-pulse generation. Wundke, K.; Po¨tting, S.; Auxier, J.; Schu¨lzgen, A.; Peyghambarian, N.; Borrelli, N. F. // Applied Physics Letters;1/3/2000, Vol. 76 Issue 1 

    We investigate the use of PbS quantum-dot-doped glasses as saturable absorbers for ultrashort-pulse lasers by means of absorption bleaching experiments and numerical analysis of the pulse shaping process using the Haus' master equation. We explain the mode-locking mechanism and the limitations...

  • A hybrid system of GaAs whisker nanocrystals and PbS quantum dots on silicon substrate. Khrebtov, A.; Talalaev, V.; Samsonenko, Yu.; Werner, P.; Rutskaya, V.; Artem'ev, M.; Tsyrlin, G. // Technical Physics Letters;Jul2014, Vol. 40 Issue 7, p558 

    It is shown that a hybrid nanocomposite structure can be created by integration of semiconducting materials with different dimensionalities: an array of quasi-1D GaAs whisker nanocrystals formed by molecular-beam epitaxy on a Si (111) substrate and 0D PbS colloidal quantum dots. The...

  • Reduced Carrier Recombination in PbS - CuInS2 Quantum Dot Solar Cells. Sun, Zhenhua; Sitbon, Gary; Pons, Thomas; Chen, Zhuoying; Bakulin, Artem A. // Scientific Reports;5/29/2015, p10626 

    Energy loss due to carrier recombination is among the major factors limiting the performance of TiO2/PbS colloidal quantum dot (QD) heterojunction solar cells. In this work, enhanced photocurrent is achieved by incorporating another type of hole-transporting QDs, Zn-doped CuInS2 (Zn-CIS) QDs...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics