Quantized Auger recombination of biexcitons in CdSe nanorods studied by time-resolved photoluminescence and transient-absorption spectroscopy
スポンサーリンク
概要
- 論文の詳細を見る
We studied the recombination dynamics of biexcitons in elongated CdSe nanocrystals (nanorods) usingtime-resolved photoluminescence (PL) and transient absorption (TA) spectroscopy. The decay times of the PLand TA signals decrease with increasing nanorod length. Under weak excitation, the PL decay is faster thanthe TA decay, and the nonradiative hole trapping determines the PL decay in several hundreds of picoseconds.Under intense excitation, the PL decay curves are similar to the TA decay curves, and the rapid biexciton decay iscaused by nonradiative Auger recombination. A clear correlation is observed between the Auger recombinationcoefficient of the biexcitons and the average PL lifetime of the single excitons.Moreover, theAuger recombinationlifetimes of the biexcitons are shorter in nanorods than in spherical nanocrystals of the same volume. Our studyclarified that the Auger recombination rate is strongly affected by a high surface-state density.
- 2011-04-27
論文 | ランダム
- 中井正一研究--図書館論を中心として
- WHAT TIME DOES TENSE INDICATE? : STATUS OF TENSE IN THE ENGLISH VERB SYSTEM
- On the Equivalent Thickness of a Side-Grooved Specimen
- レーザー技術/希ガスエキシマ準位間の量子干渉効果を利用した真空紫外コヒーレント光発生 (レーザー研シンポジウム'99共同研究成果報告書 1998年4月〜1999年3月)
- ファジィスケジューリングの管加工・組立への応用