English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

To solve the conventional conflict between maintaining good charge transportproperty and achieving high light extraction efficiency when usingmicro/nanostructure patterned substrates to extract light from organic lightemitting diodes (OLEDs), we developed a novel OLED structure, termed High-indexDeep-Groove Dielectric Nanomesh OLED (HDNM-OLED), fabricated by large-areananoimprint lithography (NIL). The key component is a nanostructure-patternedsubstrate embedded with a high-index deep-groove nanomesh and capped with alow-index planarization layer. The high-index and deep-groove nanomeshefficiently releases the tapped photons to achieve significantly enhanced lightextraction. And the planarization layer helps to maintain the good chargetransport property of the organic active layers deposited on top of it. For agreen phosphorescent OLED in our demonstration, with the HDNM-OLED structure,compared to planar conventional ITO-OLED structure, the external quantumefficiency (EQE) was enhanced by 1.85-fold from 26% to 48% and power efficiencywas enhanced by 1.86-fold from 42lm/W to 79lm/W. Besides green OELDs, theHDNM-OLED structure was also shown to be able to work for red and blue-emittingOELDs and achieved enhanced light extraction efficiency (1.58-fold for redlight, 1.86-fold for blue light) without further structure modification, whichdemonstrated the light extraction enhancement by the HDNM-OLED is broadband.

Enhancing Light Extraction of Organic Light Emitting Diodes by Deep-Groove High-index Dielectric Nanomesh Using Large-area Nanoimprint