Details

Autor(en) / Beteiligte

• Shornikova, Elena V
• Biadala, Louis
• Yakovlev, Dmitri R
• Sapega, Victor F
• Kusrayev, Yuri G
• Mitioglu, Anatolie A
• Ballottin, Mariana V
• Christianen, Peter C M
• Belykh, Vasilii V
• Kochiev, Mikhail V
• Sibeldin, Nikolai N
• Golovatenko, Aleksandr A
• Rodina, Anna V
• Gippius, Nikolay A
• Kuntzmann, Alexis
• Jiang, Ye
• Nasilowski, Michel
• Dubertret, Benoit
• Bayer, Manfred

Titel

Addressing the exciton fine structure in colloidal nanocrystals: the case of CdSe nanoplatelets

Ist Teil von

• Nanoscale, 2018-01, Vol.10 (2), p.646-656

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We study the band-edge exciton fine structure and in particular its bright-dark splitting in colloidal semiconductor nanocrystals by four different optical methods based on fluorescence line narrowing and time-resolved measurements at various temperatures down to 2 K. We demonstrate that all these methods provide consistent splitting values and discuss their advances and limitations. Colloidal CdSe nanoplatelets with thicknesses of 3, 4 and 5 monolayers are chosen for experimental demonstrations. The bright-dark splitting of excitons varies from 3.2 to 6.0 meV and is inversely proportional to the nanoplatelet thickness. Good agreement between experimental and theoretically calculated size dependence of the bright-dark exciton splitting is achieved. The recombination rates of the bright and dark excitons and the bright to dark relaxation rate are measured by time-resolved techniques.