Abstract
Organic light-emitting diodes (OLEDs) are attracting great interest of the scientific community and industry because they can be grown on flexible substrates using relatively simple and inexpensive technologies (solution processes). However, a problem in the fabrication of white OLEDs is that it is difficult to achieve a balance between the intensities of individual emission components in the blue, green, and red spectral regions. In this work, we try to solve this problem by creating a two-component light-emitting diode based on modified polyfluorene (PF-BT), which efficiently emits in the blue–green region, and CdSe/ZnS/CdS/ZnS semiconductor quantum dots emitting in the orange–red region with a fluorescence quantum yield exceeding 90%. By changing the mass ratio of components in the active light-emitting composite within 40–50%, it is possible to transform the diode emission spectrum from cold to warm white light without loss of the diode efficiency. It is very likely that optimization of the morphology of multilayer light-emitting diodes will lead to further improvement of their characteristics.
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References
B. Lenkeviciute et al., Synth. Met. 209, 343 (2015).
S. Dayneko et al., Mater. Today Proc. 3, 211 (2016).
B. H. Kim et al., Nano Lett. 15, 969 (2015).
W. Wu et al., Vacuum 111, 1 (2015).
X. Dai et al., Nature 515, 96 (2014).
X. Gong et al., Nature Photon. 10, 253 (2016).
U. Resch-Genger et al., Nat. Meth. 5, 763 (2008).
L. E. Brus, J. Chem. Phys. 80, 4403 (1984).
H. Tetsuka et al., J. Mater. Chem. 3, 3536 (2015).
X. Li et al., Adv. Funct. Mater. 26, 2435 (2016).
P. Samokhvalov et al., Proc. SPIE 8955, 89550S (2014).
B. S. Mashford et al., Nat. Photon. 7, 407 (2013).
X. Dai et al., Nature 515, 96 (2014).
Y. Honmou et al., Nat. Commun. 5, 4666 (2014). doi 10.1038/ncomms5666
S. Dayneko et al., Proc. SPIE 9270, 927009 (2014).
S. Coe et al., Nature 420, 800 (2002).
J. Zhao et al., Nano Lett. 6, 463 (2006).
H. H. Kimet al., Sci. Rep. 5, 8968 (2015).
W. K. Bae et al., Nat. Commun. 4, 2661 (2013). doi 10.1038/ncomms3661
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Original Russian Text © S.V. Dayneko, P.S. Samokhvalov, D. Lypenko, G.I. Nosova, I.A. Berezin, A.V. Yakimanskii, A.A. Chistyakov, I. Nabiev, 2017, published in Optika i Spektroskopiya, 2017, Vol. 122, No. 1, pp. 17–21.
An erratum to this article is available at http://dx.doi.org/10.1134/S0030400X1706025X.
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Dayneko, S.V., Samokhvalov, P.S., Lypenko, D. et al. A highly efficient white-light-emitting diode based on a two-component polyfluorene/quantum dot composite. Opt. Spectrosc. 122, 12–15 (2017). https://doi.org/10.1134/S0030400X17010040
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DOI: https://doi.org/10.1134/S0030400X17010040