Journal
MATERIALS & DESIGN
Volume 205, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2021.109738
Keywords
Doped nanoparticles; Thin composite film; PLED
Categories
Funding
- Ministry of Education, Youth and Sports of the Czech Republic-Program NPU I [LO1504]
- Ministry of Education, Youth and Sports of the Czech Republic - DKRVO [RP/CPS/2020/006]
- Internal Grant Agency of Tomas Bata University in Zlin [IGA/CPS/2019/007, IGA/CPS/2020/003]
- Operational Program Research and Development for Innovations
- European Regional Development Fund
- national budget of Czech Republic [CZ.1.05/2.1.00/19.0409]
- Research & Innovation Operational Programme - ERDF [313021T081]
Ask authors/readers for more resources
The work focuses on power efficiency and luminance of polymer light-emitting diodes (PLED) based on polymer matrix and nanoparticulate filler. The addition of Al-doped ZnO nanoparticles significantly improved the performance of the diodes, enhancing eleclroluminescence intensity and luminance. The effects of nanoparticulate doping are related to electronic band structure affected by the addition of nanoparticles.
The work is focused on power efficiency and luminance of polymer light-emitting diodes (PLED) based on polymer matrix and nanoparticulate filler. As polymer matrices poly[2-methoxy-5-(2-ethylhexyloxy)-1 ,4-phenylenevinylene] (MEH-PPV) and poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadia zol-4,8-diyl)] (F8BT) were used. Nanofillers, aluminium-doped ZnO nanoparticles, were prepared by microwave-assisted polyol method and characterized by XRD, SEM, and TEM. Obtained nanoparticle colloids were mixed with dissolved polymer. Then, nanocomposite active layers of prepared PLEDs were spin-cast in one processing step. Specific optoelectronic and electric properties of nanocomposite materials and performance of PLED devices were investigated using UV-Vis absorption, photoluminescence, energy-resolved electrochemical impedance spectroscopy (ER-EIS), and I-V and luminance measurements. The addition of Al-doped ZnO nanoparticles improved power efficiency of diodes exhibiting an order of magnitude enhancement in electroluminescence intensity, luminance (from 1900 to 20 700 cd/m2 for MEH-PPV and from 4 600 to 38 000 cd/m2 for F8BT) and had pronounced effect on opening bias voltage of final devices. In addition, two effects of nanoparticulate doping were revealed. The first, specific one, related with electronic structure of used nanoparticles. The second, non-specific, which indirectly contributes to structural ordering of the polymer matrix. Observed phenomena are related to electronic band structure affected by the addition of nanoparticles as revealed by ER-EIS. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available