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Title: Enhancement of hole injection using ozone treated Ag nanodots dispersed on indium tin oxide anode for organic light emitting diodes

Abstract

The authors report the enhancement of hole injection using an indium tin oxide (ITO) anode covered with ultraviolet (UV) ozone-treated Ag nanodots for fac tris (2-phenylpyridine) iridium Ir(ppy){sub 3}-doped phosphorescent organic light-emitting diodes (OLEDs). X-ray photoelectron spectroscopy and UV-visible spectrometer analysis exhibit that UV-ozone treatment of the Ag nanodots dispersed on the ITO anode leads to formation of Ag{sub 2}O nanodots with high work function and high transparency. Phosphorescent OLEDs fabricated on the Ag{sub 2}O nanodot-dispersed ITO anode showed a lower turn-on voltage and higher luminescence than those of OLEDs prepared with a commercial ITO anode. It was thought that, as Ag nanodots changed to Ag{sub 2}O nanodots by UV-ozone treatment, the decrease of the energy barrier height led to the enhancement of hole injection in the phosphorescent OLEDs.

Authors:
; ; ; ; ; ; ; ;  [1];  [2];  [2]
  1. School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology (KIT), Gumi 730-701 (Korea, Republic of)
  2. (Korea, Republic of)
Publication Date:
OSTI Identifier:
20960232
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 16; Other Information: DOI: 10.1063/1.2719153; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANODES; BEAM INJECTION; DOPED MATERIALS; ELECTRIC POTENTIAL; HOLES; INDIUM COMPOUNDS; IRIDIUM; LIGHT EMITTING DIODES; ORGANIC SEMICONDUCTORS; OZONE; PHOSPHORESCENCE; QUANTUM DOTS; SILVER OXIDES; SPECTROMETERS; TIN OXIDES; ULTRAVIOLET RADIATION; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA; WORK FUNCTIONS; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Moon, Jong-Min, Bae, Jung-Hyeok, Jeong, Jin-A, Jeong, Soon-Wook, Park, No-Jin, Kim, Han-Ki, Kang, Jae-Wook, Kim, Jang-Joo, Yi, Min-Su, Department of Materials Science and Engineering, Seoul National University, Silim-dong, Seoul 151-741, Korea and Center for Organic Light Emitting Diodes, Seoul National University, Silim-dong, Seoul 151-741, and Department of Materials Science and Engineering, Sangju National University, Sangju, Gyeongbuk 742-711. Enhancement of hole injection using ozone treated Ag nanodots dispersed on indium tin oxide anode for organic light emitting diodes. United States: N. p., 2007. Web. doi:10.1063/1.2719153.
Moon, Jong-Min, Bae, Jung-Hyeok, Jeong, Jin-A, Jeong, Soon-Wook, Park, No-Jin, Kim, Han-Ki, Kang, Jae-Wook, Kim, Jang-Joo, Yi, Min-Su, Department of Materials Science and Engineering, Seoul National University, Silim-dong, Seoul 151-741, Korea and Center for Organic Light Emitting Diodes, Seoul National University, Silim-dong, Seoul 151-741, & Department of Materials Science and Engineering, Sangju National University, Sangju, Gyeongbuk 742-711. Enhancement of hole injection using ozone treated Ag nanodots dispersed on indium tin oxide anode for organic light emitting diodes. United States. doi:10.1063/1.2719153.
Moon, Jong-Min, Bae, Jung-Hyeok, Jeong, Jin-A, Jeong, Soon-Wook, Park, No-Jin, Kim, Han-Ki, Kang, Jae-Wook, Kim, Jang-Joo, Yi, Min-Su, Department of Materials Science and Engineering, Seoul National University, Silim-dong, Seoul 151-741, Korea and Center for Organic Light Emitting Diodes, Seoul National University, Silim-dong, Seoul 151-741, and Department of Materials Science and Engineering, Sangju National University, Sangju, Gyeongbuk 742-711. Mon . "Enhancement of hole injection using ozone treated Ag nanodots dispersed on indium tin oxide anode for organic light emitting diodes". United States. doi:10.1063/1.2719153.
@article{osti_20960232,
title = {Enhancement of hole injection using ozone treated Ag nanodots dispersed on indium tin oxide anode for organic light emitting diodes},
author = {Moon, Jong-Min and Bae, Jung-Hyeok and Jeong, Jin-A and Jeong, Soon-Wook and Park, No-Jin and Kim, Han-Ki and Kang, Jae-Wook and Kim, Jang-Joo and Yi, Min-Su and Department of Materials Science and Engineering, Seoul National University, Silim-dong, Seoul 151-741, Korea and Center for Organic Light Emitting Diodes, Seoul National University, Silim-dong, Seoul 151-741 and Department of Materials Science and Engineering, Sangju National University, Sangju, Gyeongbuk 742-711},
abstractNote = {The authors report the enhancement of hole injection using an indium tin oxide (ITO) anode covered with ultraviolet (UV) ozone-treated Ag nanodots for fac tris (2-phenylpyridine) iridium Ir(ppy){sub 3}-doped phosphorescent organic light-emitting diodes (OLEDs). X-ray photoelectron spectroscopy and UV-visible spectrometer analysis exhibit that UV-ozone treatment of the Ag nanodots dispersed on the ITO anode leads to formation of Ag{sub 2}O nanodots with high work function and high transparency. Phosphorescent OLEDs fabricated on the Ag{sub 2}O nanodot-dispersed ITO anode showed a lower turn-on voltage and higher luminescence than those of OLEDs prepared with a commercial ITO anode. It was thought that, as Ag nanodots changed to Ag{sub 2}O nanodots by UV-ozone treatment, the decrease of the energy barrier height led to the enhancement of hole injection in the phosphorescent OLEDs.},
doi = {10.1063/1.2719153},
journal = {Applied Physics Letters},
number = 16,
volume = 90,
place = {United States},
year = {Mon Apr 16 00:00:00 EDT 2007},
month = {Mon Apr 16 00:00:00 EDT 2007}
}