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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-231 |
| Subject |
Optoelectronic studies of Bare and Ligand capped CdSe Solids |
| Authors |
Hyojin Kim, Eunji Sim*
Department of Chemistry, Yonsei University, Korea
|
| Abstract |
In this presentation, we focus on the relationship between white light emission of CdSe nanoparticles and composition/coverage of ligands. In experiments, some ligands including trioctylphosphine oxide(TOPO), phosphonic acid, and amine have been reported to quench the broad trap state emission, whereas thiols raise the intensity of the trap state emission. This observation suggests that the regulation of white light emission is possible by means of ligand exchange, which certainly has been realized in experiments. However, fundamental understanding for the relationship between the ligand properties and the quenching/enhancement of the trap state emission has not been clarified yet. We employ density functional theory to investigate the role of ligands on the electronic structures of CdSe nanoparticles in presence or absence of various ligands. We show that the band gap structure, hence, the white light emission can be controlled by manipulating ligands not only by their distinctive chemical properties but also by the composition and the coverage of ligands. |
| E-mail |
sinlin@yonsei.ac.kr |
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121st General Meeting of the KCS