Spiro-substitution effect of terfluorenes on amplified spontaneous emission and lasing behaviors

Zuo, Zongyan; Ou, Changjin; Ding, Yongjie; Zhang, He; Sun, Sixian; Xie, Linghai; Xia, Ruidong; Huang, Wei

doi:10.1039/c8tc00714d

Cited by 6 publications

(14 citation statements)

References 55 publications

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“…Based on the SSH concept, as shown in Figure , on the one hand, the researchers investigated the SSH effect of 3D steric bulky molecules on conventional disorder thin films and device performances. ,− For example, the introduction of SSH could enable the dumbbell-shaped molecules to achieve high-efficiency deep-blue emission by suppressing aggregation of pyrene-based chromophores . On the other hand, the SSH effect could guide us in designing molecular building blocks to manipulate the supramolecular interactions; thus, it can align the organic nanostructures, such as organic 2D or 3D crystals. , The motivation for preparing nanocrystals of 3D steric bulky molecules is to make use of their superior integrated optoelectronic properties and high thermodynamic stability.…”

Section: Molecular Engineering Of 3d Steric Bulky Molecules For Nanoc...mentioning

confidence: 99%

3D Steric Bulky Semiconductor Molecules toward Organic Optoelectronic Nanocrystals

Dong

et al. 2021

ACS Materials Lett.

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With minimal defects, few grain boundaries, and high-performance optoelectronic characteristics, organic semiconductor nanocrystals (OSNCs) have emerged as promising solutions for miniaturized organic devices and related optoelectronic circuits. To realize this, it is crucial that the OSNCs should possess desired morphologies and unique optoelectronic attributions. After the planar π-conjugated building blocks, the steric bulky molecules with a three-dimensional (3D) framework enable the multiscale self-assembly architectures and superior charge storage properties, as well as high-performance optoelectronic applications, such as organic transistor memory, organic light-emitting diodes, organic lasers and organic photovoltaic cells. However, this type of 3D steric bulky molecule-based OSNCs are not easily to get, and molecular design principles must be developed. In this Review, recent advances in the efficient theories that have arose in building varied nanoarchitectures of 3D steric bulky molecule-based OSNCs, especially the 2D and 3D in morphology, are highlighted. The obtained steric OSNCs exhibited rich optoelectronic properties, including the charge storage, ion transmission, crystallization-enhanced emission, and so on. Further architectural optimization of the steric OSNCs to cater for optoelectronic device based on them is necessary to strive to develop this research direction.

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Section: Molecular Engineering Of 3d Steric Bulky Molecules For Nanoc...mentioning

confidence: 99%

3D Steric Bulky Semiconductor Molecules toward Organic Optoelectronic Nanocrystals

Dong

et al. 2021

ACS Materials Lett.

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“…Organic wide‐bandgap semiconductors (OWBGS) are fascinating and promising materials with numerous potential applications, such as flexible electronics, [ 1 ] organic light‐emitting diodes (OLEDs), [ 2 ] organic solid‐state lasers (OSSLs), [ 3 ] organic photovoltaics (OPVs), [ 4 ] nanogenerators, [ 5 ] as well as memristive neurocomputing, [ 6 ] even artificial intelligence. [ 7 ] In the past 30 years, the third‐generation OWBGS have received wide attention due to their advantages over atom‐precise synthesis and superior performances.…”

Section: Introductionmentioning

confidence: 99%

Crystallization‐Enhanced Stability by Effectively Suppressing Photooxidation Defect for Optoelectronic Devices

Zhang

Lin

Liu

et al. 2022

Adv Materials Inter

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Effective protection against photooxidation of organic wide‐bandgap semiconductors is a potential method to afford high efficient deep‐blue emission for full color displays. Herein, the crystallization effect of fluorene‐based blue emitter on suppressing the formation of long‐wavelength green band (g‐band) defect is demonstrated through the model of self‐assembled organic micro/nanocrystals. The selected molecule 2,2'‐bi(9,9‐dipropyl)fluorene (DDC3F), which easily generates strong g‐band emission (green index (Igreen/Iblue) of ≈5 under ultraviolet exposure for 3 h) in amorphous state, shows an excellent spectra stability of deep‐blue emission with a green index of ≈0 and an unchangeable CIE coordination of (0.18, 0.09) in crystalline nanorod morphologies. Such effect of crystallization‐induced stability enhancement can be further extended into other solution‐processing methods such as brushing. Molecular dynamic simulation reveals that crystalline nanorods with compact molecular packing enable to effectively block the diffusion of O2 and H2O molecules, which is crucial to suppress the occurrence of photooxidation reactions. Along with high quantum yield of 87% from crystallization‐induced luminescence enhancement effect, such ultrastable deep‐blue emission on crystalline film can also be maintained in solution‐processing organic light‐emitting diode devices. The supramolecular self‐assembled micro/nanocrystals strategy provides a potential platform to maintain ultrastable color purity in organic optoelectronic devices.

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“… 13 − 18 Fluorene cores can also be functionalized with thiophene or benzothiophene moieties to provide diverse optoelectronic properties such as solvatochromism, tunable emission, etc. 19 − 23 …”

Section: Introductionmentioning

confidence: 99%

Golden Age of Fluorenylidene Phosphaalkenes–Synthesis, Structures, and Optical Properties of Heteroaromatic Derivatives and Their Gold Complexes

et al. 2020

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The substitution of 2,7-dibromo-9-fluorenyl phosphaalkenes with heteroaromatic substituents (bithiophene, benzothiophene, pyridine) offers access to interesting push–pull dye molecules. Steric shielding due to the bulky P-substituent gives marked different reactivities at the 2- and 7-positions, allowing the synthesis of mixed/asymmetric derivatives. Further functionalization via gold(I) coordination was demonstrated and increased the acceptor character, concomitant with a red-shifted absorption.

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Spiro-substitution effect of terfluorenes on amplified spontaneous emission and lasing behaviors

Abstract: Spiro terfluorenes are shown to have improved ASE properties and the impressive lasing threshold of terfluorenes is demonstrated.

Cited by 6 publications

References 55 publications

3D Steric Bulky Semiconductor Molecules toward Organic Optoelectronic Nanocrystals

3D Steric Bulky Semiconductor Molecules toward Organic Optoelectronic Nanocrystals

Crystallization‐Enhanced Stability by Effectively Suppressing Photooxidation Defect for Optoelectronic Devices

Golden Age of Fluorenylidene Phosphaalkenes–Synthesis, Structures, and Optical Properties of Heteroaromatic Derivatives and Their Gold Complexes

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