Triphenylamine-based donor–π–acceptor organic phosphors: synthesis, characterization and theoretical study

Abstract

We have designed and synthesized donor (D) and acceptor (A) phosphors [D and A refer to the electron-donating and electron-withdrawing moieties, respectively] as yellow-emitting organic phosphors.

Multiple Luminescence Responses towards Mechanical Stimulus and Photo‐Induction: The Key Role of the Stuck Packing Mode and Tunable Intermolecular Interactions

“…[15,16] According to the above points and based on our recent works, herein, ML and photo-induced RTP properties have been combined in an ultra-simple organic molecule, N,N-diphenyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (TPA-B), as shown in Figure 1. The commone lectron donor,t he triphenylamine moiety [17,18] with spatial structure, plays an essentialr ole in molecular packing and the resultant light emission properties. With the analysis of crystal structures, together with the PL and ML characterization in different conditions, the stuck packing modes with tunable intermoleculari nteractions were demonstrated as the main reasonsf or bringingt hese two kinds of light emission together.T hrough comprehensive understanding of the relationship between molecular packing and the resultant emission properties with differentf orms and stimulus sources in the same organic molecule, some guidelines can be presentedt od esign organic compounds with ML or photo-induced RTP properties, but also smart functional materials with multiple luminescencep roperties, promoting their development in encryption and security applications.…”

A Novel Highly Efficient Host‐Sensitized Red Emitting (Ba2YV3O11 : Eu3+) Phosphor for Hybrid White LEDs

“…The electroluminescence spectrum of the fabricated red LED is illustrated in Figure a, the spectrum shows the intense emission of Eu 3+ ion, which is much greater than that of near UV LED emission (the digital image of the fabricated red LED is shown in Figure a). The electroluminescence spectrum of white LED is shown in Figure b and the white LED was fabricated with the combination of n‐UV LED and yellow organic dye and the synthesized host lattice (blue) and optimized red phosphor (Ba 2 Y 0.4 Eu 0.6 V 3 O 11 ). The spectrum shows the white light with higher CRI (89) and CCT (4693 K) values and the digital image of the white LED, and the CIE diagram is shown in Figure b inset.…”

A Bifunctional Bulky Thienothiophene Derivative; Synthesis, Electronic‐Optical Properties and OLED Applications

“…They are widely used as hole‐ and electron‐transporters, emitting layer for OLEDs and charge transporting materials [8,9] . Fluorescent triphenylamine in solution, which is generally used as a good electron donor in organic material systems, becomes less emissive or even non‐emissive in solid state due to aggregation caused quenching (ACQ) [10–15] . Moreover, TPA and its fluorophores are expected to produce highly functional materials, synchronously achieving color and emission dual switching, beneficial for the development of both color and emission mode images.…”