Zno and graphene

1,261 views

Published on

Published in: Education, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,261
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
41
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Zno and graphene

  1. 1. Emissive ZnO-graphene quantumdots for white-light-emitting diodes Tufan Ghosh Department of Chemistry Indian Institute of Technology MadrasWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  2. 2. Introduction Graphene has diverse applications in the field ofphysics, chemistry and material science ZnO has been a promising material in developmentof exciton-based optoelectronic devices such as LEDsand photovoltaic cells Quantum dots, because of the quantumconfinement effect, has potential application innanoscale devices such as next-generation electronicand optoelectronic devices (including LEDs and solarcells)Won Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  3. 3. Chemical synthesis process for the ZnO- graphene quasi-quantum dotsWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  4. 4. Structural characterization of ZnO- graphene quantum dotsWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  5. 5. Optical characterization of ZnO- graphene quantum dotsWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  6. 6. Modelling of DOSWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  7. 7. Modelling of DOSWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  8. 8. Modelling of DOSWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  9. 9. Characterization of ZnO-graphene quantum-dot LEDsWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  10. 10. Summary and conclusion A novel, simple and facile technique have beendeveloped for the synthesis of ZnO-graphene quasi-core-shell QDs Blue emissions (406 nm and 432 nm) wereobserved in ZnO-graphene quantum dots which areabsent in pure ZnO quantum dots DFT calculations shows that these new peaks aredue to the splitting of the LUMO of graphene inthree orbitals with distinct energy levelsWon Kook Choi et al., Nature Nanotecnol., 2012, 7, 465-471
  11. 11. Thank You

×