TY - JOUR
T1 - Photonic effects on the Förster resonance energy transfer efficiency
AU - Rabouw, Freddy T.
AU - Den Hartog, Stephan A.
AU - Senden, Tim
AU - Meijerink, A
PY - 2014/4/2
Y1 - 2014/4/2
N2 - Förster resonance energy transfer (ET) between luminescent species is applied in bio-imaging, lighting and photovoltaics, and has an important role in photosynthesis. However, the fundamental question of whether ET rates and efficiencies can be tuned by the photonic environment remains under debate. Here we show that ET rates are independent of the photonic environment, using the model system of LaPO4 nanocrystals co-doped with Ce3+ donors and Tb3+ acceptors. Although the radiative emission rate of the Ce3+ excited state increases with the refractive index of the solvent in which the nanocrystals are dispersed, the Ce3+ -to-Tb 3+ ET rate does not. We demonstrate that, as a result, lower refractive index solvents enable higher ET efficiencies leading to higher Tb3+ emission intensities. Furthermore, an analytical model for ET in (nano)crystalline host materials is presented, able to predict the dependence of ET efficiencies on the photonic environment and the concentration of acceptor ions.
AB - Förster resonance energy transfer (ET) between luminescent species is applied in bio-imaging, lighting and photovoltaics, and has an important role in photosynthesis. However, the fundamental question of whether ET rates and efficiencies can be tuned by the photonic environment remains under debate. Here we show that ET rates are independent of the photonic environment, using the model system of LaPO4 nanocrystals co-doped with Ce3+ donors and Tb3+ acceptors. Although the radiative emission rate of the Ce3+ excited state increases with the refractive index of the solvent in which the nanocrystals are dispersed, the Ce3+ -to-Tb 3+ ET rate does not. We demonstrate that, as a result, lower refractive index solvents enable higher ET efficiencies leading to higher Tb3+ emission intensities. Furthermore, an analytical model for ET in (nano)crystalline host materials is presented, able to predict the dependence of ET efficiencies on the photonic environment and the concentration of acceptor ions.
UR - http://www.scopus.com/inward/record.url?scp=84897524527&partnerID=8YFLogxK
U2 - 10.1038/ncomms4610
DO - 10.1038/ncomms4610
M3 - Article
AN - SCOPUS:84897524527
SN - 2041-1723
VL - 5
JO - Nature Communications [E]
JF - Nature Communications [E]
M1 - 3610
ER -