White‐Light Emission Strategy of a Single Organic Compound with Aggregation‐Induced Emission and Delayed Fluorescence Properties

Xie, Zongliang; Chen, Chengjian; Xu, Shidang; Li, Jun; Zhang, Yi; Liu, Siwei; Xu, Jiarui; Chi, Zhenguo

doi:10.1002/anie.201502180

Cited by 459 publications

(200 citation statements)

References 40 publications

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“…Recently, luminescent materials, especially aggregation‐induced emission luminogens (AIEgens), have been a hotspot due to their wide applications in biosensors, information storage, and organic light‐emitting diodes (OLEDs) . The main benefit of aggregation‐induced emission (AIE) is the manifestation and augmentation of radiative excited states for organic molecular systems .…”

Section: Methodsmentioning

confidence: 99%

Aggregation‐Induced Dual‐Phosphorescence from Organic Molecules for Nondoped Light‐Emitting Diodes

et al. 2019

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Aggregation‐induced emission (AIE) is a beneficial strategy for generating highly effective solid‐state molecular luminescence without suffering losses in quantum yield. However, the majority of reported AIE‐active molecules exhibit only strong fluorescence, which is not ideal for electrical excitation in organic light‐emitting diodes (OLEDs). By introducing various substituent groups onto the biscarbazole compound, a series of molecular materials with aggregation‐induced phosphorescence (AIP) is designed, which exhibits two distinctly different phosphorescence bands and an absolute solid‐state room‐temperature phosphorescence quantum yield up to 64%. Taking advantage of the AIE feature, the AIP molecules are fabricated into OLEDs as a homogeneous light‐emitting layer, which allows for relatively small efficiency roll‐off and shows an external electroluminescence quantum yield of up to 5.8%, more than the theoretical limit for purely fluorescent OLED devices. The design showcases a promising strategy for the production of cost‐effective and highly efficient OLED technology.

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Section: Methodsmentioning

confidence: 99%

Aggregation‐Induced Dual‐Phosphorescence from Organic Molecules for Nondoped Light‐Emitting Diodes

et al. 2019

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“…Furthermore, in the THF/H 2 O solution mixture, with the increase of the water fraction (>80%), the blue emission of bis(4‐(9 H ‐carbazol‐9‐yl)phenyl)methanone (O2C) (at around 460 nm) in THF exhibited significantly TICT‐AIE nature, while bis(4‐(10 H ‐phenothiazin‐10‐yl)phenyl)methanone (O2P) showed a strong yellow emission at around 554 nm, a typical AIE characteristics (Figure b). Compound 19 , as an offspring of O2C and O2P, inherits not only the emission profiles of blue and yellow colors, but also the TICT‐AIE nature (Figure b, f w = 80%) . Therefore, based on the design principle of molecular inheritance, a single white‐light‐emitting organic compound with AIE‐DF nature can be achieved by matching the parent molecules.…”

Section: White‐light Emission Based On Single Organic Moleculesmentioning

confidence: 99%

Single‐Molecular White‐Light Emitters and Their Potential WOLED Applications

et al. 2020

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White organic light‐emitting diodes (WOLEDs) are superior to traditional incandescent light bulbs and compact fluorescent lamps in terms of their merits in ensuring pure white‐light emission, low‐energy consumption, large‐area thin‐film fabrication, etc. Unfortunately, WOLEDs based on multilayered or multicomponent (red, green, and blue (RGB)) emissive layers can suffer from some remarkable disadvantages, such as intricate device fabrication and voltage‐dependent emission color, etc. Single molecules, which can emit white light, can be used to replace multiple emitters, leading to a simplified fabrication process, stable and reproducible WOLEDs. Recently, the performance of WOLEDs by using single molecules is catching up with that of the state‐of‐the‐art devices fabricated by multicomponent emitters. Therefore, an increasing attention has been paid on single white‐light‐emitting materials for efficient WOLEDs. In this review, different mechanisms of white‐light emission from a single molecule and the performance of single‐molecule‐based WOLEDs are collected and expounded, hoping to light up the interesting subject on single‐molecule white‐light‐emitting materials, which have great potential as white‐light emitters for illumination and lighting applications in the world.

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“…In order to decrease thermal decay and quenching by oxygen, luminescent dyes are made as crystals, or are blended into polymers [11,[17][18][19]. For example, Kim et al [20] prepared a series of organic crystals that could emit bright phosphorescence at room temperature due to halogen bonding.…”

Section: Introductionmentioning

confidence: 99%

Dual-Emissive Waterborne Polyurethanes Prepared from Naphthalimide Derivative

et al. 2017

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Fluorescent and room-temperature phosphorescent (RTP) materials are widely used in bioimaging, chemical sensing, optoelectronics and encryption. Here, a series of single-component dual-emissive waterborne polyurethanes (WPUs) with both fluorescence and room-temperature phosphorescence were synthesized. Dye without halogen atom incorporated into WPUs can only exhibit fluorescence due to poor spin-orbit coupling. When bromine atom is introduced into dye, we found that WPUs can emit both fluorescence and room-temperature phosphorescence with lifetimes up to milliseconds because of enhanced spin-orbit coupling. Moreover, with an increase in dye concentrations in WPUs, excimers are formed due to the aggregation effect, and may promote communication between singlet and triplet states. At different dye concentrations, structural, thermal, and luminescent properties serve as the main focus.

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White‐Light Emission Strategy of a Single Organic Compound with Aggregation‐Induced Emission and Delayed Fluorescence Properties

Cited by 459 publications

References 40 publications

Aggregation‐Induced Dual‐Phosphorescence from Organic Molecules for Nondoped Light‐Emitting Diodes

Aggregation‐Induced Dual‐Phosphorescence from Organic Molecules for Nondoped Light‐Emitting Diodes

Single‐Molecular White‐Light Emitters and Their Potential WOLED Applications

Dual-Emissive Waterborne Polyurethanes Prepared from Naphthalimide Derivative

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