Enhancing light out-coupling in flexible organic light emitting devices through the localized surface plasmon resonance of urchin-like gold nanoparticles
Xiaoqing Liao , Zhigang Huang , Ying Li , Jiang Cheng , Lu Li
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引用次数: 0
Abstract
The local surface plasmon resonance (LSPR) effect and scattering properties of gold nanoparticles are effective ways to improve the light extraction efficiency of organic light-emitting diodes (OLEDs). Here five different kinds of urchin-like gold nanoparticles (UGNs) were synthesized using the seed-mediated method. The finite-difference time-domain (FDTD) method was used to calculate the near-field local and far-field scattering properties of various sea urchin-like gold nanoparticles. All five types of UGNs demonstrated certain levels of light enhancement within the visible band. The flexible OLED devices were created by doping five different types of nanoparticles into the flexible substrates. The hollow UGNs device exhibited a maximum current efficiency of 124.25 cd/A, a maximum power efficiency of 131.27 lm/W, and a maximum EQE of 45.54 %. When compared to undoped flexible devices, the maximum current efficiency, the maximum power efficiency, and the maximum EQE increase by 132 %, 82 %, and 36 %, respectively. The results indicate that combining the flexible conductive substrate and UGNs is an effective strategy for improving light extraction from flexible OLEDs. This enhancement effect originates from UGNs acting as a scattering layer to reduce total light reflection, and the luminous intensity of the device is improved due to the LSPR of sea urchin-like nanoparticles.
期刊介绍：
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.
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