Numerical simulation on white OLEDs with dotted-line doped emitting layers

Shu-Hsuan Chang, Chien Yang Wen, Yi Hsiang Huang, Yen-Kuang Kuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

White organic light-emitting diodes (OLEDs) have attracted great attention recently. In this study, high-efficiency white organic light-emitting diodes with dotted-line doped layers are numerically investigated with the APSYS (abbreviation of Advanced Physical Model of Simulation Devices) simulation program. The APSYS simulation program, developed by Crosslight Inc., is capable of dealing with the optical, electrical, and thermal characteristics of OLED devices. To approach the real situation, the OLED device fabricated by Park et al. (Current Applied Physics 1, 116, 2001) was first modeled by adjusting the appropriate physical parameters. Based on this OLED structure, a new structure of ITO/α-NPD (40 nm)/Alq3:DCJTB (30 nm)/Alq3 (30 nm)/Mg: Ag emitting quasi-white light was then proposed. Then, the single layer of Alq3:DCJTB was replaced by multi-(Alq3:DCJTB/Alq 3)n layers, which are the so-called dotted-line doped layers (see, e.g., paper by Han et al., Solid State Communications 141, 332, 2007), to further improve the optical performance. The optical properties of the white OLEDs with different pairs of (Alq3:DCJTB/Alq3)n dotted-line doped layers are investigated and discussed in detail. Optimization of the proposed quasi-white OLED structures is attempted. The simulation results indicate that the OLED with dotted-line doped layers has higher radiative recombination rate and better emission efficiency than that with a single Alq3:DCJTB layer. The physical origin of the improved optical performance for the OLED with dotted-line doped layers could be due to the increased electrons and holes at the interfaces between the Alq 3:DCJTB and Alq3 layers, which thus results in higher radiative recombination rate and better emission efficiency.

Original languageEnglish
Title of host publicationOrganic Photonic Materials and Devices XI
Volume7213
DOIs
Publication statusPublished - 2009 Jun 29
EventOrganic Photonic Materials and Devices XI - San Jose, CA, United States
Duration: 2009 Jan 272009 Jan 29

Other

OtherOrganic Photonic Materials and Devices XI
CountryUnited States
CitySan Jose, CA
Period09-01-2709-01-29

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All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Chang, S-H., Wen, C. Y., Huang, Y. H., & Kuo, Y-K. (2009). Numerical simulation on white OLEDs with dotted-line doped emitting layers. In Organic Photonic Materials and Devices XI (Vol. 7213). [72131J] https://doi.org/10.1117/12.808895