Tailoring hole injection using facilely solution-processed economical calcium carbonate in near ultraviolet organic light-emitting diodes

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发表日期：

2024年11月15日

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Jingwei Wu,
Jielong Li,
Hao Chen,
Yuwei Liu,
Bingyu Wang,
Xiaocui Wang,
Lingyu Huo,
Liming Liu,
Xiaowen Zhang

摘要

Economical nano-scale CaCO₃ particles with superior aqueous dispersion and facile preparation process of sand milling are demonstrated. The spin-coated CaCO₃, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and CaCO₃-doped PEDOT:PSS films are characterized with scanning electron microscope, atomic force microscope, X-ray/ultraviolet photoelectron spectroscopy, current–voltage characteristics and impedance spectroscopy analysis, confirming good surface morphology and satisfactory hole injection properties. With CaCO₃-doped PEDOT:PSS tailoring hole injection and 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole as emitter, efficient near ultraviolet organic light-emitting diodes have been constructed. The device gives maximum external quantum efficiency of 1.16%, radiance of 1.95 mW/cm², and stable electroluminescent spectra peaking at 395–404 nm.