Fedin, Igor published the artcileEnhanced Emission from Bright Excitons in Asymmetrically Strained Colloidal CdSe/CdxZn1-xSe Quantum Dots, HPLC of Formula: 142-90-5, the main research area is enhanced emission bright excitons asym colloidal CdSe CdZnSe QD; acoustic phonon; bright exciton; colloidal quantum dot; exciton fine structure; nanocrystal; single-photon emitter.
Colloidal CdSe quantum dots (QDs) designed with a high degree of asym. internal strain have recently been shown to host a number of desirable optical properties including subthermal room-temperature line widths, suppressed spectral diffusion, and high photoluminescence (PL) quantum yields. It remains an open question, however, whether they are well-suited for applications requiring emission of identical single photons. Here, we measure the low-temperature PL dynamics and the polarization-resolved fluorescence line narrowing spectra from ensembles of these strained QDs. Our spectroscopy reveals the radiative recombination rates of bright and dark excitons, the relaxation rate between the two, and the energy spectra of the quantized acoustic phonons in the QDs that can contribute to relaxation processes. In comparison to conventional colloidal CdSe/ZnS core/shell QDs, we find that in asym. strained CdSe QDs over six times more light is emitted directly by the bright exciton. These results are therefore encouraging for the prospects of chem. synthesized colloidal QDs as emitters of single indistinguishable photons.
ACS Nano published new progress about Acoustic phonon. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, HPLC of Formula: 142-90-5.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics