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AFM images of (a) QD, (b) QR, and (c) XTEM image of QR.
CW PL spectra of (a) QDs and (c) QRs from to . PL transient from to 300 K at ground state energy of (b) QDs and (d) QRs. Detection energies of time-resolved spectra were fixed at PL peaks indicated by the dots shown in (a) and (c) at all temperatures.
(a) Temperature dependence of the PL decay time of QD and QR ground states. (b) PL transients from to 300 K at first excited state energy of QRs. Detection energies were fixed at excited state peaks as indicated by the dots shown in Fig. 2(c) at all temperatures.
Schematic of the dark states and ground states model and the fitting of QR’s decay time curve with a state energy separation of 13.5 meV and relaxation time of 0.7 ns.
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