Proton‐Activated Amorphous Room‐Temperature Phosphorescence for Humidity Sensing and High‐Level Data Encryption

Deng, Yuchen; Li, Peng; Sun, Song; Jiang, Haiyan; Ji, Xu; Li, Huanrong

doi:10.1002/asia.201901747

Cited by 11 publications

(13 citation statements)

References 83 publications

(37 reference statements)

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“…The PSP@PVA film could adjust the ON-OFF ring state of PSP molecules in situ by acid-base solution dropwise or acid-base vapor fumigation. Furthermore, PSP@PVA-H can be converted to PSP@PVA-N to regenerate RTP in the presence of a proper base (amine gas or ammonia), although RTP will be reduced compared with its original state before vacuum drying to remove water [ 42 , 43 ]. Based on this, an ‘ON-OFF’ RTP switch was constructed.…”

Section: Resultsmentioning

confidence: 99%

Red-light excited efficient metal-free near-infrared room-temperature phosphorescent films

Sun

Wang

et al. 2021

National Science Review

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A set of red-light-excited, metal-free room-temperature phosphorescence (RTP) systems were constructed by brominated phenolsulfonephthaleine derivatives. The best metal-free RTP system has the reddest near-infrared (NIR) RTP emission (λp = 819 nm) with the highest phosphorescence quantum yield (ΦRTP = 3.0%) so far as is known. The RTP emission can be switched ON-OFF by adding acid and alkali alternatively. A logic operation with half-subtractor function and dual-channel response (visible light emission/NIR RTP emission) was also constructed based on these properties mentioned above.

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Section: Resultsmentioning

confidence: 99%

Red-light excited efficient metal-free near-infrared room-temperature phosphorescent films

Sun

Wang

et al. 2021

National Science Review

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“…Moreover, in light of the deep-blue afterglow behavior stemming from an extraordinary source of π-π* transition for CC bonds, we simply demonstrate a promising information encryption application using terpyridine-derivatives@Lap mainly derived from n-π* transition for CO bonds in our previous study as contrast. [14] Such pattern will promote more reliable protection at much higher levels with rich encryption modes in information anti-counterfeiting. As illustrated in Figure 7 and Videos S3 and S4 in the Supporting Information, the security pattern of a rose is coded with two parts: the flower part were written using (TPA) n @Lap water solution, the part of leaves and stems were written using terpyridine-derivatives@ Lap water solution, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The green phosphorescence arises from terpyridine-derivatives (the corresponding data are shown in Figure S13-S16 in the Supporting Information). [14] effectively the development of blue/deep-blue afterglow materials with high efficiency, which may inspire a wide range of innovative applications in the future.…”

Section: Discussionmentioning

confidence: 99%

Deep‐Blue Delayed Fluorescence Supramolecular Assembly with Ultrahigh Quantum Yields of 81% from an Extraordinary Source of π–π* Transition

Deng

Zhang

et al. 2021

Advanced Optical Materials

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In recent years, organic afterglow systems with long lifetimes and high efficiency have been achieved through promoting the intersystem crossing (ISC) process and suppressing the nonradiative decay using crystallization/H-aggregation, supramolecular self-assembly and other strategy. [2] However, vast majority of the reported materials usually display the afterglow emission bands ranging from 500 to 600 nm owing to low-lying exciton energies of their triplet state and the unavoidable bathochromic shifts compared to the single-molecular fluorescence via aggregation coupling and intermolecular electronic interaction. [3] Nevertheless, the realization of the blue/deep-blue organic afterglow with high quantum efficiency and long lifetime remains a big challenge because of the difficulty of stabilizing and populating the high-lying triplet excited state simultaneously, [4] although they constitute the essential core element for the applications in solid-state lighting and full-color display. [4b] Host-guest doping strategy is believed to be an efficient way for developing blue afterglow on account of their outstanding ability of inhibiting the bathochromic shift at low doping concentrations through the obstruction of molecular aggregation and electronic coupling. [4b,5] Unfortunately, the afterglow materials constructed via the host-guest doping strategy generally suffer from the low luminous efficiency due to the low doping concentration of the guest molecules and low compatibility between polar host and guest molecules. [6] Recently, to overcome these intrinsic difficulties, Huang and his co-workers proposed an efficient method to achieve deep-blue organic afterglow (406-428 nm) with long lifetime of 1.67 s and quantum yields of 46.1% through sensitizing the triplet exciton of guest (Trimesic acid) by host molecules (cyanuric acid) and water implement to suppress the nonradiative decays for matrices rigidification. [4b] Subsequently, Chen et al. developed stable deep-blue ultralong room temperature phosphorescence materials with ultralong lifetime of 5.08 s and of high quantum efficiency of 37.6% via simply doping boron phosphor into cyanuric acid host to establish abundant H-bonds. [7] Despite the recent efforts, it remains difficult to achieve efficient blue/deep-blue organic afterglow with high quantum efficiency. Therefore, novel afterglow materials with Blue/deep-blue emission is an essential core element for application in organic optoelectronics, but it remains an enormous challenge in organic afterglow owing to the difficulties in the stabilization of the high-lying triplet excited state. Here, an effective approach to develop a deep-blue delayed fluorescence (DF) supramolecular assembly with long lifetime and recordhigh quantum efficiency up to 0.62 s and 81%, respectively, is proposed via the increase in the delocalization degree of guest molecules induced by the co-assembly of guest molecules with Laponite (Lap) achieved via simple solvent-free grinding approach. Thereby the excitation energy of si...

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“…Co-assembly of RTP inactive terpyridine-derivatives T1 and T2 ( Scheme 5 ) with LAPONITE® (LP) nanoclay through solvent-free mechanical grinding significantly enhanced the RTP to exhibit green ( T1 @LP) and blue-green ( T2 @LP) emissions. 103 The long RTP lifetime decay component of both the hybrid materials was around 1.1 s with a strong afterglow lasting for more than 10 seconds. The encapsulation of the emitters in LP helped to achieve ϕ p of 2.96 and 1.86% for T1 @LP and T2 @LP, respectively.…”

Section: Efficient Organic Phosphorsmentioning

confidence: 92%

“…The flexible and transparent films T1 @LP and T2 @LP in PVA have been used for relative-humidity sensing and information encryption. 103 The remarkable RTP characteristics of the hybrid materials generated from aromatic-acid and Al-DMSO matrices have benefited data encryption and decryption applications through allochroic response recognition and optical logic gates. 104 …”

Section: Applicationsmentioning

confidence: 99%

Efficient metal-free organic room temperature phosphors

et al. 2021

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Proton‐Activated Amorphous Room‐Temperature Phosphorescence for Humidity Sensing and High‐Level Data Encryption

Cited by 11 publications

References 83 publications

Red-light excited efficient metal-free near-infrared room-temperature phosphorescent films

Red-light excited efficient metal-free near-infrared room-temperature phosphorescent films

Deep‐Blue Delayed Fluorescence Supramolecular Assembly with Ultrahigh Quantum Yields of 81% from an Extraordinary Source of π–π* Transition

Efficient metal-free organic room temperature phosphors

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