A highly efficient organic light‐emitting diode with an imprinted in‐cell polarizer for backlight applications

Lee, Won Suk; Choi, Wonsuk; Lim, Young‐Jun; Na, Yu-Jin; Lee, Sin‐Doo

doi:10.1080/15980316.2008.9652064

Cited by 9 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…matrix 방식에는 바로 적용가능 하리라 기대한다. 제안한 편광판 기판은 마스크를 이용하여 패턴 전극을 형 성시킬 수도 있고, 편광판의 양면에 전극을 형성시켜 두 층 의 panel을 사용하는 전반사전투과 액정소자 [1,2] 나 3D 디스 플레이 [3] 에 적용할 수도 있으며, in-cell 구조 [23,24] 등 다양한 형태로 적용 가능할 것이다. 그 예로, 최근 각광받고 있는 전 반사전투과 액정 디스플레이에 편광판 기판을 적용한다면, 그림 9(a)와 같이 4장의 유리 기판과 3장의 편광필름을 사용 하는 전반사전투과 액정 디스플레이에서 4장의 유리 기판을 양면에 전극이 형성된 편광판 기판 1장과 단면에 전극이 형 성된 편광판 기판 2장을 이용하면 4장의 유리를 제거할 수 있으며, 위 구조에 그림 9(b)와 같이 상하부에 유리를 적용하 여도 2장의 유리 기판을 제거할 수 있어 parallax [4,5] 도 개선 하고, 내구성도 높은 소자를 제작할 수 있다.…”

Section: 서 론unclassified

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

진혜정¹,

김기한²,

박경호³

et al. 2011

Korean Journal of Optics and Photonics

View full text Add to dashboard Cite

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates (Received December 21, 2010; Revised manuscript February 7, 2011; Accepted February 7, 2011) We propose a super-thin and light-weight liquid crystal cell, in which glass substrates are eliminated and polarizers are used as substrates. We fabricate a polarizer substrate by depositing a-SiOX as a buffer layer, indium-tin-oxide as a transparent conducting layer, and a-SiOX as an alignment layer on a polarizer sequentially at a low temperature. We use the ion-beam method to align liquid crystals on polarizer substrates. . 이 외에도 최근 등장한 전면반사/전면투과 액정 디스플레이의 경우 투과모드 dark시 반사모드 bright가 동시 에 구현되는 계조반전을 제거하기 위하여 두 층의 액정층이 필요한데 이로 인해 픽셀면적 대비 소자가 두께가 훨씬 커지 게 되므로 반사모드 동작 시 한 sub-pixel로 입사한 빛이 다 른 sub-pixel로 출사하는 parallax 문제가 발생되어 시인성에 문제가 생긴다 [4][5][6][7] . 따라서, 초경량박형의 액정 디스플레이를 구현하기 위해 유리를 얇게 가공하는 방법이 발표되었지만 [8,9] 이러한 방법

show abstract

Section: 서 론unclassified

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

진혜정¹,

김기한²,

박경호³

et al. 2011

Korean Journal of Optics and Photonics

View full text Add to dashboard Cite

show abstract

“…In organic LEDs (OLEDs), two main strategies have been employed to realize linearly polarized emission. First, researchers have integrated OLEDs with optical structures functioning as the linear polarizer, such as the periodic grating, , and the photonic reflective polarizer . This strategy results in 50% loss in efficiency, as the integrated optical structures selectively transmit the polarized light.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Linearly Polarized Organic Light-Emitting Diodes

Dong,

Zhu,

Yin

et al. 2023

ACS Photonics

View full text Add to dashboard Cite

Thin-film light-emitting diodes (LEDs) with linearly polarized emission enable advanced photonic applications. Here, we demonstrate a linearly polarized light emission organic LED by utilizing the intrinsic polarization nature of the transverse electric (TE) waveguide mode present in the device and extracting it using a linear grating. With a device having 67.6% of the light trapped in the TE waveguide mode, we demonstrated a linearly polarized organic LED with a high current efficiency (CE) of 136 cd/A and a large polarization ratio above 30. Our analysis indicates that the CE can further be increased at least by 2-fold to 280 cd/A. Our device architecture can easily be adopted for other thin-film LED platforms for photonic applications.

show abstract

“…al demonstrated a LP-OLED with a small divergence angle less than 3°, a moderate ER TE/TM of 11.1 dB at ~ 520 nm and a high EQE of 7%, providing one of the few successful cases of polarization modulation by embedding an optical cavities using a combination of interference lithography and reactive ion etching. 39 It should be noted that the great challenge for internally integrated LP-OLED devices is how to realize a comprehensive enhancement in EQE, ER and small divergence angle, as well as to develop a cost-e cient method to replace the high-cost and time-consuming fabrication process that is involved with electron beam etching, ion etching, and nano-imprinting lithography technology [40][41] . All the above-mentioned issues inevitably hinder the commercialization process, especially for large-area LP-OLED.…”

Section: Introductionmentioning

confidence: 99%

Dual-color emissive OLED with orthogonal polarization modes

Zhai,

Chen,

Liang

2023

Preprint

View full text Add to dashboard Cite

Linearly polarized organic light-emitting diodes (LP-OLEDs) have become an appealing functional expansion in polarization optics and optoelectronic applications. However, this current LP-OLED generally presents comprehensively lower polarization performance, cost-prohibitive process and monochromatic modulation limit. Herein, a switchable dual-color OLED with orthogonal linearly polarization modes based on a dielectric/metal (D/M) nanograting-waveguide hybrid-microcavity geometry was first proposed, via the cost-efficient laser interference lithography and vacuum thermal evaporation methods. This acquired LP-OLED presented a reported transverse-electric/transverse-magnetic (TE/TM) polarization extinction ratio of 15.8 dB with a divergence angle of ± 30°, an excellent external quantum efficiency of 2.25%, and an orthogonal polarized colors from green to sky-blue. Detailed theoretical model illustrated that the rasterization of D/M-cathode further satisfied the momentum matching between waveguide and air mode. This diffracts both the targeted TE waveguide of sky-blue light that was localized furthest by modulating electron transport layer thickness and the off-confined green TM polarization light. Thereby, a polarization-encrypted colorful optical image was theoretically proposed. This work represents a significant step toward the low-cost LP-OLED with excellent polarization performance and toward the electrically-inspired polarization encryption for color images.

show abstract

A highly efficient organic light‐emitting diode with an imprinted in‐cell polarizer for backlight applications

Cited by 9 publications

References 15 publications

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

Fabrication of a Liquid Crystal Cell Using ITO-deposited Polarizers as Substrates

High-Efficiency Linearly Polarized Organic Light-Emitting Diodes

Dual-color emissive OLED with orthogonal polarization modes

Contact Info

Product

Resources

About