TY - JOUR
T1 - Highly efficient blue photoluminescence from colloidal lead-iodide nanoparticles
AU - Finlayson, C. E.
AU - Sazio, P. J.A.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/4/21
Y1 - 2006/4/21
N2 - We report the synthesis of solvent-stabilized lead-iodide nanoparticles, using a convenient route involving coordinating solvents. The resultant colloids show strong absorption features in the ultraviolet region of the optical spectrum, which are consistent with the formation of semiconducting nanocrystals of lead (II) iodide. An effective-mass approximation model of quantum-confined states is in good agreement with the observed transition energies, giving strong indications of the particle morphologies and dimensions. Intense photoluminescence is also observed, with some spectral tuning possible with ripening time, giving a range of emission photon energies approximately spanning from 2.5 to 3.0 eV. We measure photo-stable luminescence quantum efficiencies of around 20% in solution, increasing to up to 30% if the coordinating ligand is exchanged for a Lewis-base capping layer. This demonstrates the potential for the utilization of lead-iodide nanocrystals in visible optoelectronics applications.
AB - We report the synthesis of solvent-stabilized lead-iodide nanoparticles, using a convenient route involving coordinating solvents. The resultant colloids show strong absorption features in the ultraviolet region of the optical spectrum, which are consistent with the formation of semiconducting nanocrystals of lead (II) iodide. An effective-mass approximation model of quantum-confined states is in good agreement with the observed transition energies, giving strong indications of the particle morphologies and dimensions. Intense photoluminescence is also observed, with some spectral tuning possible with ripening time, giving a range of emission photon energies approximately spanning from 2.5 to 3.0 eV. We measure photo-stable luminescence quantum efficiencies of around 20% in solution, increasing to up to 30% if the coordinating ligand is exchanged for a Lewis-base capping layer. This demonstrates the potential for the utilization of lead-iodide nanocrystals in visible optoelectronics applications.
UR - http://www.scopus.com/inward/record.url?scp=33645507450&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/39/8/003
DO - 10.1088/0022-3727/39/8/003
M3 - Article
AN - SCOPUS:33645507450
SN - 0022-3727
VL - 39
SP - 1477
EP - 1480
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 8
ER -