High efficiency and stable white OLED using a single emitter

Used as a blue emitter, fluorescent dye 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl (BCzVBi) is compounded with Bis[2-(2-hydroxyphenyl)-pyridine]beryllium(Bepp2) to yield high efficiency. When combined with green and red phosphorescent emitting layers, a broad band white light organic light-emitting diodes are obtained and studied. In this device, both singlet and triplet excitons can be harvested to generate white color. Through device structure optimization, a high efficiency of 20.8 cd/A, which corresponds to an external quantum efficiency of 11.3% has been achieved.

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Self-aligned deterministic coupling of single quantum emitter to nanofocused plasmonic modes

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1418049112 ◽

2015 ◽

Vol 112 (17) ◽

pp. 5280-5285 ◽

Cited By ~ 25

Author(s):

Su-Hyun Gong ◽

Je-Hyung Kim ◽

Young-Ho Ko ◽

Christophe Rodriguez ◽

Jonghwa Shin ◽

...

Keyword(s):

Quantum Control ◽

High Efficiency ◽

Quantum Information Processing ◽

Three Dimensional ◽

Silver Layer ◽

Single Quantum ◽

Light Emitting Devices ◽

Single Emitter ◽

On Chip ◽

Application Fields

The quantum plasmonics field has emerged and been growing increasingly, including study of single emitter–light coupling using plasmonic system and scalable quantum plasmonic circuit. This offers opportunity for the quantum control of light with compact device footprint. However, coupling of a single emitter to highly localized plasmonic mode with nanoscale precision remains an important challenge. Today, the spatial overlap between metallic structure and single emitter mostly relies either on chance or on advanced nanopositioning control. Here, we demonstrate deterministic coupling between three-dimensionally nanofocused plasmonic modes and single quantum dots (QDs) without any positioning for single QDs. By depositing a thin silver layer on a site-controlled pyramid QD wafer, three-dimensional plasmonic nanofocusing on each QD at the pyramid apex is geometrically achieved through the silver-coated pyramid facets. Enhancement of the QD spontaneous emission rate as high as 22 ± 16 is measured for all processed QDs emitting over ∼150-meV spectral range. This approach could apply to high fabrication yield on-chip devices for wide application fields, e.g., high-efficiency light-emitting devices and quantum information processing.

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P-221L: Late-News Poster: New Blue Phosphorescent Host for High-efficiency White OLED

SID Symposium Digest of Technical Papers ◽

10.1889/1.3621241 ◽

2011 ◽

Vol 42 (1) ◽

pp. 1787-1789 ◽

Cited By ~ 3

Author(s):

Jin-Sheng Lin ◽

Meng-Ting Lee ◽

Miao-Tsai Chu ◽

Mei-Rurng Tseng

Keyword(s):

High Efficiency ◽

Late News ◽

White Oled ◽

Blue Phosphorescent

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Multiple strategies towards high-efficiency white organic light-emitting diodes by the vacuum deposition method

Journal of Materials Chemistry C ◽

10.1039/d0tc00085j ◽

2020 ◽

Vol 8 (17) ◽

pp. 5636-5661 ◽

Cited By ~ 4

Author(s):

Hui Liu ◽

Futong Liu ◽

Ping Lu

Keyword(s):

High Efficiency ◽

Light Emitting Diodes ◽

Organic Light Emitting Diodes ◽

Deposition Method ◽

Vacuum Deposition ◽

Light Emitting ◽

Multiple Strategies ◽

Organic Light ◽

Single Emitter ◽

Vacuum Deposition Method

This review summarizes the progress in WOLEDs in recent years including all phosphorescent WOLEDs, hybrid WOLEDs, all fluorescence WOLEDs, doping-free WOLEDs, and single-emitter WOLEDs.

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