Enhancing the luminescence efficiency of silicon-nanocrystals by interaction with H + ions

• Published in: Physical chemistry chemical physics : PCCP Vol. 20; no. 15; pp. 10445 - 10449
• Main Authors: Cannas, Marco, Camarda, Pietro, Vaccaro, Lavinia, Amato, Francesco, Messina, Fabrizio, Fiore, Tiziana, Li Vigni, Maria
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 2018
• Subjects: Chemical synthesis; Decay rate; Defects; Electron paramagnetic resonance; Emission; Excitation spectra; Excitons; Interlayers; Laser ablation; Nanocrystals; Photoluminescence; Pulsed lasers; Quantum efficiency; Radiative recombination; Silicon dioxide

The emission of silicon nanocrystals (Si-NCs), synthesized by pulsed laser ablation in water, was investigated on varying the pH of the solution. These samples emit μs decaying orange photoluminescence (PL) associated with radiative recombination of quantum-confined excitons. Time-resolved spectra r...