A Unique Blend of 2‐Fluorenyl‐2‐anthracene and 2‐Anthryl‐2‐anthracence Showing White Emission and High Charge Mobility

Chen, Mengyun; Zhao, Yang; Yan, Lijia; Yang, Shuai; Zhu, Yanan; Murtaza, Imran; He, Gufeng; Meng, Hong; Huang, Wei

doi:10.1002/anie.201608131

Cited by 99 publications

(49 citation statements)

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“…From the calculated emission spectra, we found both of the two molecules mainly emit blue light with the maximum peak of around 455 nm in solution, Figure b. Our calculated results are consistent well with the blue‐light emission observed in the experiments …”

Section: Resultssupporting

confidence: 87%

“…These indicate that the two compounds both are close to planar structure in aggregate phase. The calculation results are really close to their single crystal structures, where the corresponding dihedral angle in FlAnt and 2 A are 170.06° and 179.62°, respectively . And the aggregation has a negligible effect on the bond length in both system.…”

Section: Resultssupporting

confidence: 72%

“…Benifiting from its strong modifiability, anthracene derivatives were also synthesized and played important roles in the fields of photochemistry, supramolecular chemistry, photobiology and so on . In 2017, it was found that the mixture of FlAnt , a newly synthesized anthracene derivative and its by‐product 2 A exhibited surprisingly white‐light photoluminescence . And, the blend also exhibited high charge mobility.…”

Section: Introductionmentioning

confidence: 99%

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Computational Study on the Charge Transport and Optical Spectra of Anthracene Derivatives in Aggregates

et al. 2020

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A recent experiment [Angew. Chem. Int. Ed. 2017, 56, 722-727] found that a (1 : 9) blend film of two anthracene derivatives, 2fluorenyl-2-anthracene (FlAnt) and 2-anthryl-2-anthracence (2 A), exhibit both efficient white light emission and high hole mobility, thus promising for organic light-emitting transistors (OLETs). Employing quantum chemistry at the polarizable continuum model (PCM) and the quantum mechanics/molecular mechanics (QM/MM) levels, we investigated the excitedstate structures, optical spectra, band structure and the carrier mobility for FlAnt and 2 A from solution to aggregate phases. We suggest using the ratio of intermolecular excitonic coupling J and intramolecular excited state relaxation energy E to judge the bathochromic shift in optical emission in aggregates. For FlAnt, 1 = J/E is calculated to be less than 0.17, a critical value we identified earlier, and the spectra in solution and aggregate phases present quite similar features (blue emission). However, 1 is~0.5 for 2 A systems, and the calculated emission in the aggregate phase exhibits a remarkable bathochromic shift. In addition, the 0-0 emission is strongly suppressed in the herringbone stacking. These observations justify the experimental findings that (i) 2 A is blue emissive in solution but yellowgreen in the aggregate phase, whereas FlAnt is always blue, and (ii) the blend of them show white emission. By using the "quantum nuclear tunneling" model we proposed earlier, we found the hole mobility for FlAnt and 2 A are 0.5 and 4.2 cm 2 V À 1 s À 1 , respectively, indicating both are good hole transport materials.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

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Computational Study on the Charge Transport and Optical Spectra of Anthracene Derivatives in Aggregates

et al. 2020

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“…[8] TheF lAnt molecule keeps ad istance of 5.037-6.049 from the surrounding molecules,w hereas the 2A molecule keeps as horter distance of 4.676-5.958 ( Figure 2). [8] TheF lAnt molecule keeps ad istance of 5.037-6.049 from the surrounding molecules,w hereas the 2A molecule keeps as horter distance of 4.676-5.958 ( Figure 2).…”

mentioning

confidence: 99%

“…To correlate the optoelectronic properties with the molecular-packing structure,w eg rew single crystals of FlAnt and 2A by sublimation for X-ray crystal-structure analysis. [8] TheF lAnt molecule keeps ad istance of 5.037-6.049 from the surrounding molecules,w hereas the 2A molecule keeps as horter distance of 4.676-5.958 ( Figure 2). Thus,w ea ssume that the two molecules with the shortest distance of 4.676 tend to form excimers:When one of the molecules becomes an exciton, it combines with the adjacent molecule to form an excimer for the sake of lowering the energy,which reduces the blue emission and gives narrowband-gap light emission.…”

mentioning

confidence: 99%

A Unique Blend of 2‐Fluorenyl‐2‐anthracene and 2‐Anthryl‐2‐anthracence Showing White Emission and High Charge Mobility

et al. 2016

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White-light-emitting materials with high mobility are necessary for organic white-light-emitting transistors,w hich can be used for self-driven OLED displays or OLED lighting. In this study,w ec ombined two materials with similar structures-2-fluorenyl-2-anthracene (FlAnt) with blue emission and 2-anthryl-2-anthracence (2A) with greenish-yellow emission-to fabricate OLED devices,which showed unusual solid-state white-light emission with the CIE coordinates (0.33, 0.34) at 10 V. The similar crystal structures ensured that the OTFTs based on mixed FlAnt and 2A showed high mobility of 1.56 cm 2 V À1 s À1 .This simple method provides new insight into the design of high-performance white-emitting transistor materials and structures.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under http://dx.

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Organic Semiconductor Single Crystals for Electronics and Photonics

2018

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Organic semiconducting single crystals (OSSCs) are ideal candidates for the construction of high-performance optoelectronic devices/circuits and a great platform for fundamental research due to their long-range order, absence of grain boundaries, and extremely low defect density. Impressive improvements have recently been made in organic optoelectronics: the charge-carrier mobility is now over 10 cm V s and the fluorescence efficiency reaches 90% for many OSSCs. Moreover, high mobility and strong emission can be integrated into a single OSSC, for example, showing a mobility of up to 34 cm V s and a photoluminescence yield of 41.2%. These achievements are attributed to the rational design and synthesis of organic semiconductors as well as improvements in preparation technology for crystals, which accelerate the application of OSSCs in devices and circuits, such as organic field-effect transistors, organic photodetectors, organic photovoltaics, organic light-emitting diodes, organic light-emitting transistors, and even electrically pumped organic lasers. In this context, an overview of these fantastic advancements in terms of the fundamental insights into developing high-performance organic semiconductors, efficient strategies for yielding desirable high-quality OSSCs, and their applications in optoelectronic devices and circuits is presented. Finally, an overview of the development of OSSCs along with current challenges and future research directions is provided.

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A Unique Blend of 2‐Fluorenyl‐2‐anthracene and 2‐Anthryl‐2‐anthracence Showing White Emission and High Charge Mobility

Cited by 99 publications

References 29 publications

Computational Study on the Charge Transport and Optical Spectra of Anthracene Derivatives in Aggregates

Computational Study on the Charge Transport and Optical Spectra of Anthracene Derivatives in Aggregates

A Unique Blend of 2‐Fluorenyl‐2‐anthracene and 2‐Anthryl‐2‐anthracence Showing White Emission and High Charge Mobility

Organic Semiconductor Single Crystals for Electronics and Photonics

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