Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Issues in Progress Current Issue All Issues Feature Issues

Light diffusing effects of nano and micro-structures on OLED with microcavity

Doo-Hee Cho, Jin-Wook Shin, Chul Woong Joo, Jonghee Lee, Seung Koo Park, Jaehyun Moon, Nam Sung Cho, Hye Yong Chu, and Jeong-Ik Lee

Open Access Open Access

Abstract

We examined the light diffusing effects of nano and micro-structures on microcavity designed OLEDs. The results of FDTD simulations and experiments showed that the pillar shaped nano-structure was more effective than the concave micro-structure for light diffusing of microcavity OLEDs. The sharp luminance distribution of the microcavity OLED was changed to near Lambertian luminance distribution by the nano-structure, and light diffusing effects increased with the height of the nano-structure. Furthermore, the nano-structure has advantages including light extraction of the substrate mode, reproducibility of manufacturing process, and minimizing pixel blur problems in an OLED display panel. The nano-structure is a promising candidate for a light diffuser, resolving the viewing angle problems in microcavity OLEDs.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
FDTD analysis of the light extraction efficiency of OLEDs with a random scattering layer

Jun-Whee Kim, Ji-Hyang Jang, Min-Cheol Oh, Jin-Wook Shin, Doo-Hee Cho, Jae-Hyun Moon, and Jeong-Ik Lee
Opt. Express 22(1) 498-507 (2014)

RCWA and FDTD modeling of light emission from internally structured OLEDs

Michiel Koen Callens, Herman Marsman, Lieven Penninck, Patrick Peeters, Harry de Groot, Jan Matthijs ter Meulen, and Kristiaan Neyts
Opt. Express 22(S3) A589-A600 (2014)

Design of high-contrast OLEDs with microcavity effect

Daniel Poitras, Chien-Cheng Kuo, and Christophe Py
Opt. Express 16(11) 8003-8015 (2008)

View More...

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (12)
Fig. 1
Fig. 1 Schematic diagram of the microcavity OLED with RNS or MCS used in this study.

Download Full Size | PDF

Fig. 2
Fig. 2 SEM images of the surface of the RNS (a), cross-section of RNS 200 (b), RNS 350 (c), and RNS 500 (d).

Download Full Size | PDF

Fig. 3
Fig. 3 Luminance distribution curves of the reference microcavity OLED, OLED with RNS 200, RNS 350, and RNS 500.

Download Full Size | PDF

Fig. 4
Fig. 4 Normalized emission spectra of the reference microcavity OLED (a), OLED with RNS 200 (b), RNS 350 (c), and RNS 500 (d).

Download Full Size | PDF

Fig. 5
Fig. 5 SEM images of MCS 18 (a) and MCS 42 (b).

Download Full Size | PDF

Fig. 6
Fig. 6 Luminance distribution curves of the reference microcavity OLED, OLED with MCS 18 and MCS 42.

Download Full Size | PDF

Fig. 7
Fig. 7 Normalized emission spectra of OLED with MCS 18 (a) and MCS 42 (b).

Download Full Size | PDF

Fig. 8
Fig. 8 Schematic diagrams of the model of FDTD simulation for the microcavity OLED; (a) is for OLED with flat glass, (b) for the MCS 10 μm, and (c) for the RNS 500 nm.

Download Full Size | PDF

Fig. 9
Fig. 9 Normalized power distribution curves depending on viewing angle calculated by FDTD simulations for the OLED with MCS (a) and RNS (b).

Download Full Size | PDF

Fig. 10
Fig. 10 Ray tracing results of the flat glass for 1° (a) and 45° (b) of radiation angle of incident rays.

Download Full Size | PDF

Fig. 11
Fig. 11 Ray tracing results of the deep pit array for 1° (a) and 45° (b) of radiation angle of incident rays.

Download Full Size | PDF

Fig. 12
Fig. 12 Ray tracing results of the shallow pit array for 1° (a) and 45° (b) of radiation angle of incident rays.

Download Full Size | PDF

Tables (1)

Tables Icon

Table 1 Optical Properties of Microcavity OLEDs with RNS and MCS

View Table

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

σ s = 2 π 5 3 d 6 λ 4 ( n 2 −1 n 2 +2 ) 2
Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use