Improved hole injection for blue phosphorescent organic light-emitting diodes using solution deposited tin oxide nano-particles decorated ITO anodes

Scientific Reports
Seung Il LeeWoo Young Kim

Abstract

Blue phosphorescent organic light-emitting diodes (PHOLEDs) were fabricated with tin oxide (SnOx) nano-particles (NPs) deposited at the ITO anode to improve their electrical and optical performances. SnOx NPs helped ITO to increase the work function enhancing hole injection capability. Charge balance of the device was achieved using p- and n-type mixed host materials in emissive layer and the devices' luminance and maximum external quantum efficiency (EQE) increased about nearly 30%. Tuning the work function using solution processed NPs allows rapid optimization of device efficiency.

References

Jul 15, 1992·Physical Review. B, Condensed Matter·J M ThemlinJ M Gilles
Nov 23, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Szu-Yen YuYu-Tai Tao
Dec 14, 2011·Nano Letters·Taner AytunCleva W Ow-Yang
May 15, 2013·ACS Nano·Jesus A Caraveo-FrescasHusam N Alshareef
Dec 17, 2016·ACS Applied Materials & Interfaces·Van-Huong TranIn-Hwan Lee
Feb 9, 2017·ACS Applied Materials & Interfaces·Jérémy BarbéSilvano Del Gobbo

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Citations

Jun 15, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Roberto SorrentinoUmberto Giovanella

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Methods Mentioned

BETA
electron diffraction
electron spectroscopy
transmission electron
x-ray spectroscopy
atomic force microscopy
AFM

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