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(a) Room-temperature PL spectra for QD samples capped with (solid lines) and (broken lines) under different RTA temperatures. The RTA annealing duration for each sample was . (b) Peak separation between the two PL components as a function of RTA temperature, extracted from PL spectra for samples capped with . (c) PL peak intensity at different RTA temperatures for samples capped with (엯), (▵), and without dielectric cap (◻).
Energy shift as a function of annealing temperature for samples capped with (엯), (▵), and without dielectric cap (◻). Also shown is the differential energy shift (∎) for samples capped with and .
(a) Relationship between PL linewidth and energy shift for QD samples by RTA with cap (엯), cap (▵) and without dielectric cap (◻). The results by laser annealing with cap (▾) were also plotted for comparison. (b) Blueshift in wavelength as a function of annealing duration and YAG laser power density at (∎), (▴), and (●).
Raman spectra of QDs with (a) and without (b) laser annealing.
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