TY - GEN
T1 - Direct evaluation about structure and optical property of individual multi-shell quantum dot by TEM
AU - Uehara, M.
AU - Nakahigashi, N.
AU - Sato, Y.
AU - Terauchi, M.
N1 - Funding Information:
The research was partially supported by JSPS KAKENHI Grant Number 26286026, Grant-in-Aid for Scientific Research (B). In addition, this HR-STEM observation was partly supported by Advanced Characterization Platform of the Nanotechnology Platform Japan sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
Publisher Copyright:
© The Electrochemical Society.
PY - 2016
Y1 - 2016
N2 - CdSe nanocrystals (NCs) that show an excellent photoluminescence (PL) attract much attention owing to their promising applications in LED. They are usually coated by the wider band materials such CdS and ZnS in order to improve the quantum yield with the chemical resistance. However, the relationship between optical property and structure is not clarified, because the evaluation of core/shell structure is difficult. The common evaluation of optical property that is conducted as a collectivity such as UV-vis absorbance has some uncertainty, because the morphology of individual NC is not complete same and the property would be not also same. In this study, we have tried to direct-evaluate the optical properties and structure of individual single NCs. Even the optical properties from UV to NIR can be evaluated by the HR-EELS (Low-loss region) using the monochromator TEM. We have discussed the optical and structure property by the comparison of above evaluation and HR-STEM analysis.
AB - CdSe nanocrystals (NCs) that show an excellent photoluminescence (PL) attract much attention owing to their promising applications in LED. They are usually coated by the wider band materials such CdS and ZnS in order to improve the quantum yield with the chemical resistance. However, the relationship between optical property and structure is not clarified, because the evaluation of core/shell structure is difficult. The common evaluation of optical property that is conducted as a collectivity such as UV-vis absorbance has some uncertainty, because the morphology of individual NC is not complete same and the property would be not also same. In this study, we have tried to direct-evaluate the optical properties and structure of individual single NCs. Even the optical properties from UV to NIR can be evaluated by the HR-EELS (Low-loss region) using the monochromator TEM. We have discussed the optical and structure property by the comparison of above evaluation and HR-STEM analysis.
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U2 - 10.1149/07553.0007ecst
DO - 10.1149/07553.0007ecst
M3 - Conference contribution
AN - SCOPUS:85025156917
T3 - ECS Transactions
SP - 7
EP - 12
BT - Nanotechnology General Session
A2 - Leonte, O. M.
A2 - Atanassov, P.
A2 - Chen, L.
A2 - Kim, D.
PB - Electrochemical Society Inc.
T2 - Symposium on Nanotechnology General Session - PRiME 2016/230th ECS Meeting
Y2 - 2 October 2016 through 7 October 2016
ER -