Skip to main content Accessibility help
×
Home

Photoinduced conductivity enhancement in quantum dot/multilayer graphene nanostructures

  • Yulia A. Gromova (a1), Ivan A. Reznik (a1), Ilia A. Vovk (a1), Simas Rackauskas (a2), Andrei V. Alaferdov (a2) (a3), Anna A. Orlova (a1), Stanislav A. Moshkalev (a2), Alexander V. Baranov (a1) and Anatoly V. Fedorov (a1)...

Abstract

We report on the formation of photoactive hybrid structures based on multilayer graphene nanobelts and CdSe/ZnS quantum dots (QDs) on Pt microelectrodes. We have found that heat treatment in mild conditions enhances rate of electrical photoresponse of the hybrid structures due to elimination of long-lived charge traps. We also show that the electrical photoresponse polarity depends on the energy level structure of the QDs.

Copyright

References

Hide All
1 Xia, F., Mueller, T., Lin, Y.-m., Valdes-Garcia, A. & Avouris, P. Ultrafast graphene photodetector. Nature nanotechnology 4, 839843 (2009).
2 Mueller, T., Xia, F. & Avouris, P. Graphene photodetectors for high-speed optical communications. Nature Photonics 4, 297301 (2010).
3 Lemme, M. C. et al. Gate-activated photoresponse in a graphene p–n junction. Nano letters 11, 41344137 (2011).
4 Gabor, N. M. et al. Hot carrier–assisted intrinsic photoresponse in graphene. Science 334, 648652 (2011).
5 Echtermeyer, T. et al. Strong plasmonic enhancement of photovoltage in graphene. Nature communications 2, 458 (2011).
6 Koppens, F. H., Chang, D. E. & Garcia de Abajo, F. J. Graphene plasmonics: a platform for strong light–matter interactions. Nano letters 11, 33703377 (2011).
7 Lin, Y. et al. Dramatically enhanced photoresponse of reduced graphene oxide with linker-free anchored CdSe nanoparticles. ACS nano 4, 30333038 (2010).
8 Dai, L. Layered graphene/quantum dots: nanoassemblies for highly efficient solar cells. ChemSusChem 3, 797799 (2010).
9 Konstantatos, G. et al. Hybrid graphene-quantum dot phototransistors with ultrahigh gain. Nature nanotechnology 7, 363368 (2012).
10 Sun, Z. et al. Infrared Photodetectors Based on CVD-Grown Graphene and PbS Quantum Dots with Ultrahigh Responsivity. Advanced Materials 24, 58785883 (2012).
11 Gromova, Y. A. et al. in SPIE Photonics Europe. 91262K-91262K-91266 (International Society for Optics and Photonics).
12 Kuno, M., Fromm, D., Hamann, H., Gallagher, A. & Nesbitt, D. “On”/“off” fluorescence intermittency of single semiconductor quantum dots. The Journal of chemical physics 115, 10281040 (2001).
13 Zhang, K., Chang, H., Fu, A., Alivisatos, A. P. & Yang, H. Continuous distribution of emission states from single CdSe/ZnS quantum dots. Nano Letters 6, 843847 (2006).
14 Konstantatos, G., Levina, L., Fischer, A. & Sargent, E. H. Engineering the temporal response of photoconductive photodetectors via selective introduction of surface trap states. Nano letters 8, 14461450 (2008).
15 Talapin, D. V., Rogach, A. L., Kornowski, A., Haase, M. & Weller, H. Highly Luminescent Monodisperse CdSe and CdSe/ZnS Nanocrystals Synthesized in a Hexadecylamine−Trioctylphosphine Oxide−Trioctylphospine Mixture. Nano Letters 1, 207211, doi:10.1021/nl0155126 (2001).
16 Murray, C., Norris, D. J. & Bawendi, M. G. Synthesis and characterization of nearly monodisperse CdE (E= sulfur, selenium, tellurium) semiconductor nanocrystallites. Journal of the American Chemical Society 115, 87068715 (1993).
17 Maijenburg, A. et al. Dielectrophoretic alignment of metal and metal oxide nanowires and nanotubes: A universal set of parameters for bridging prepatterned microelectrodes. Journal of colloid and interface science 355, 486493 (2011).
18 Moshkalev, S. et al. Formation of reliable electrical and thermal contacts between graphene and metal electrodes by laser annealing. Microelectronic Engineering 121, 5558 (2014).
19 Alaferdov, A. et al. Formation of thin, flexible, conducting films composed of multilayer graphene. Bulletin of the Russian Academy of Sciences: Physics 78, 13571361 (2014).
20 Kathalingam, A., Senthilkumar, V. & Rhee, J.-K. Hysteresis I–V nature of mechanically exfoliated graphene FET. Journal of Materials Science: Materials in Electronics 25, 13031308 (2014).
21 Giovannetti, G. et al. Doping graphene with metal contacts. Physical Review Letters 101, 026803 (2008).

Keywords

Photoinduced conductivity enhancement in quantum dot/multilayer graphene nanostructures

  • Yulia A. Gromova (a1), Ivan A. Reznik (a1), Ilia A. Vovk (a1), Simas Rackauskas (a2), Andrei V. Alaferdov (a2) (a3), Anna A. Orlova (a1), Stanislav A. Moshkalev (a2), Alexander V. Baranov (a1) and Anatoly V. Fedorov (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed