Abstract
Distinctive spectroscopic characteristics are observed in colloidal perovskite CsPbBr3 quantum dot (QD) dispersed in octane doped with PPO. As the content of CsPbBr3-QD increases, the emission and the absorption energies decrease due to QD-cluster formed in case of the inter-QD distance smaller than diameter of QD. Spectroscopic evidences supporting QD-cluster are found in the Urbach energy and the carrier lifetime. Unusual absorption lines showing explicit QD dependence are observed in Fourier-transform infrared spectra, which is explained by vibrational modes of bound PPO hybridized with CsPbBr3-QD.
Original language | English |
---|---|
Pages (from-to) | 107-110 |
Number of pages | 4 |
Journal | Journal of the Korean Vacuum Society |
Volume | 30 |
Issue number | 4 |
DOIs | |
State | Published - Jul 2021 |
Keywords
- Absorption
- CsPbBr
- Fourier-transform infrared spectroscopy
- Perovskite
- Quantum dot
- Time-resolved photoluminescence