Fig. 1
Digital images of samples (A) PQ-Dot solution; (B) PQ-Dot solid composite polymer rods and disks exposed to ultraviolet lamp; (C and D) PQ-Dot composite rods before and after cutting the rods
Fig. 2
Absorption spectra of PQ-Dots: (a) solution; (b, c) composite solid samples; and (d) polymer matrix
Fig. 3
Emission and excitation spectra of PQ-Dots excited at different wavelengths: (A) solution; (B) composite rod; and (C) composite disk
Table 1
Comparison of the emission, excitation, spontaneous emission, and ASE maxima among the solution, composite rod, and composite disk
| Sample | Emission maxima | Excitation maxima | Emission maxima excited by laser source | ASE maxima excited by laser |
|---|---|---|---|---|
| Solution | 541 nm | 355 nm, 375 nm, 416 nm, 463 nm | 534 nm | 556 nm |
| Composite rod | 535 nm | 390 nm, 410 nm, 461 nm | 542 nm | |
| Composite disk | 536 nm | 310 nm, 370 nm, 412 nm, 461 nm | 538 nm |
[i] ASE, amplified spontaneous emission
Fig. 4
Comparison of emission and excitation spectra of the PQ-Dot solution, composite polymer rods, and composite disks
Fig. 5
Spontaneous emission (SE) spectra of (A) PQ-Dot solution, (B) cylindrical composite rod and disk, and (C) the difference between the conditions for registration of the spectra
Fig. 6
Comparison between spontaneous and stimulated emission spectra of perovskite quantum dot composite rods at different (A) 465 nm excitation wavelengths and (B) sample sizes
Fig. 7
(A, B) ASE behavior spectra; (C) (a) threshold line, (b) peaks, and (c) FWHM with 465-nm pump energy of perovskite quantum dot composite rod. ASE, amplified spontaneous emission; FWHM, full width at half maximum
Fig. 8
SEM images of PQ-Dots in (A) solution, (B and C) composite polymer rods; (D) EDX spectra. EDX, energy dispersive X-ray spectroscopy; PQ-Dots, perovskite quantum dots
Fig. 9
TEM images of PQ-Dots at (A) low and (B) high resolution; (C) EDX spectra. EDX, energy dispersive X-ray spectroscopy; PQ-Dots, perovskite quantum dots
Fig. 10
TEM images of the PQ-Dot composite polymer matrix at (A) low and (B) high resolution; (C) EDX spectra. EDX, energy dispersive X-ray spectroscopy; PQ-Dots, perovskite quantum dots