High-performance organic light-emitting diodes with natural white emission based on thermally activated delayed fluorescence emitters

Abstract

<p>WOLEDs with stable natural white emission based on all-TADF emitters.</p>

Synthesis of Efficient and Stable Tetrabutylammonium Copper Halides with Dual Emissions for Warm White Light‐Emitting Diodes

“…An adjustable dual‐emission performance avoids the need for a complex feedback control system or high cost problems for warm WLED application [22] . For lighting applications, the ideal white light source should emit a continuous and broad spectrum like natural sunlight, but the instability of multicomponent mixture will result in poor CRI, which is disadvantageous for indoor lighting [23] . TBA−Cu‐I compounds with broad‐band emission can achieve high brightness, distinguished efficiency and also excellent stability that further promote their development for WLED applications [24] .…”

“…[22] For lighting applications, the ideal white light source should emit a continuous and broad spectrum like natural sunlight, but the instability of multicomponent mixture will result in poor CRI, which is disadvantageous for indoor lighting. [23] TBAÀ Cu-I compounds with broadband emission can achieve high brightness, distinguished efficiency and also excellent stability that further promote their development for WLED applications. [24] As a result, the obtained warm WLED based on TBAÀ Cu-I compound can achieve a high color rendering index (CRI) value of 89 and a correlated color temperature (CCT) of 4516 K, which are appropriate for illumination applications.…”

Advances in Host-Free White Organic Light-Emitting Diodes Utilizing Thermally Activated Delayed Fluorescence: A Comprehensive Review

“…Various types of WOLEDs have been developed, including all-phosphorescent white light [ 8 , 9 ], all-fluorescent white light [ 10 , 11 ], TADF white light [ 12 , 13 ], hybrid white light [ 14 , 15 , 16 ], and others. The first generation of OLED luminescent materials, namely fluorescent materials, were unable to effectively utilize the generated triplet excitons, resulting in an internal quantum efficiency (IQE) [ 17 ] of only 25%.…”

Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes

“…White organic light-emitting diodes (WOLEDs) have a great application prospect in daily lighting owing to their merits of low energy consumption, eye protection, and additional flexibility potential 1 – 6 . Compared with stacked WOLEDs 7 or multiple-emitting-layer WOLEDs 8 , 9 , single-emitting-layer WOLEDs (SEL-WOLEDs) are favored for commercialization due to the drastically simplified device structure and reduced production costs 10 , 11 . However, a formidable challenge lies in the rational control of both singlet and triplet excitons between host materials and different color emitters in the single-emitting-layer 12 – 16 , making simultaneous efficiency improvement and color control a fundamental issue in SEL-WOLEDs 17 – 22 .…”