Fig. 3: Optical characterization of triply doped core@shell@shell SiO2 MPs. | Nature Communications

Fig. 3: Optical characterization of triply doped core@shell@shell SiO2 MPs.

From: Programmable afterglow tuning in monodisperse SiO2 microparticles through spatially confined emitter doping

Fig. 3: Optical characterization of triply doped core@shell@shell SiO2 MPs.The alternative text for this image may have been generated using AI.

a Design of doping combinations with 4-PP, 4,4’-BP, and 1,8-NP dopants integrated into different layers of core@shell@shell SiO2 MPs. Photographs of corresponding ethanol dispersions exhibit excitation-dependent afterglow. b–d Excitation-afterglow mapping for 4,4’-BP-doped SiO2 MPs, 4,4’-BP-doped SiO2@1,8-NP-doped SiO2 MPs, and 4,4’-BP-doped SiO2@1,8-NP-doped SiO2@4-PP-doped SiO2 MPs. Lifetime and afterglow QY measurements for (e) cyan afterglow after the growth of shell layers of 4,4’-BP-doped SiO2 and 1,8-NP-doped SiO2, (f) blue afterglow after the growth of shell layers of 4-PP-doped SiO2 and 1,8-NP-doped SiO2, and (g) orange afterglow after the growth of shell layers of 4-PP-doped SiO2 and 4,4’-BP-doped SiO2. The dependence of lifetime and afterglow QYs on the shell layer combinations is depicted by different colors of circles and squares, representing the corresponding dopants.

Back to article page