このアイテムのアクセス数: 230

このアイテムのファイル:
ファイル 記述 サイズフォーマット 
JPSCP.1.012024.pdf687.21 kBAdobe PDF見る/開く
タイトル: Photo-Excited Electron and Hole Dynamics in Semiconductor Quantum Dots: Phonon-Induced Relaxation, Multiple Excito Generation and Recombination
著者: Kim, Hyeon-Deuk
著者名の別形: 金, 賢得
キーワード: quantum dot
photo-excited exciton dynamics
Auger recombination
multiple exciton generation/recombination
photovoltaic device
solar energy conversion
発行日: 26-Mar-2014
出版者: The Physical Society of Japan
誌名: JPS Conference Proceedings
巻: 1
論文番号: 12024
抄録: Phonon-induced relaxation, multiple exciton generation and recombination (MEG and MER) govern optical properties and photo-excited dynamics in QDs. We simulated such photo-excited dynamics of electron and hole in semiconductor quantum dots (QD) by combining time-dependent ab initio density functional theory and non-adiabatic molecular dynamics. Our approach is based on atomictic simulations accounting for QD size, shape, defects, core–shell distribution, surface ligands, and charge trapping, which significantly influence the properties of photo-excited QDs. The calculated data were obtained as real-time photo-induced processes and described as various dynamics owing to the non-perturbative treatment of quantum transition dynamics. The simulations provide direct evidence that the high-frequency ligand modes on the QD surface play a key role in all of the electron–phonon relaxation, MEG and MER. The insights reported here suggest novel routes for controlling the photo-induced processes in semiconductor QDs and lead to new design principles for increasing efficiencies of photovoltaic devices.
記述: Proceedings of the 12th Asia Pacific Physics Conference (APPC12) : Makuhari, Japan, July 14–19, 2013
著作権等: © 一般社団法人 日本物理学会(The Physical Society of Japan)
This is not the published version. Please cite only the published version.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/193530
DOI(出版社版): 10.7566/JPSCP.1.012024
関連リンク: http://journals.jps.jp/doi/book/10.7566/appc12
出現コレクション:学術雑誌掲載論文等

アイテムの詳細レコードを表示する

Export to RefWorks


出力フォーマット 


このリポジトリに保管されているアイテムはすべて著作権により保護されています。