A self-powered pressure-sensor matrix based on ZnS:Mn particles for more-secure signature collection is presented, by recording both handwritten signatures and the pressure applied signees. This large-area, flexible sensor can map 2D distributions in situ, either statically or dynamically, piezophotonic effect proposed to initiate mechanoluminescence process once a dynamic mechanical strain applied.

Mechanoluminescence (ML) featuring photon emission by mechanical stimuli is promising for applications such as stress sensing, display, and artificial skin. However, the progress of utilizing ML processes constrained limited range available spectra. Herein, a general strategy expanding through use lanthanide emitters reported. A lithium-assisted annealing method effective incorporation various ions (e.g., Tb3+ , Eu3+ Pr3+ Sm3+ Er3+ Dy3+ Ho3+ Nd3+ Tm3+ Yb3+ ) into CaZnOS crystals that are...

Actively collecting the mechanical energy by efficient conversion to other forms of such as light opens a new possibility energy-saving, which is pivotal significance for supplying potential solutions present crisis. Such has shown promising applications in modern sensors, actuators, and harvesting. However, implementation technologies being hindered because most luminescent materials show weak non-recoverable emissions under excitation. Herein, class heterojunctioned ZnS/CaZnOS...

Abstract Currently, most of the mechanoluminescence (ML) phosphors strongly depend on postirradiation stimulation using ultraviolet light (denoted as “UV exposure” from hereon) to show ML. However, only a few transition metal cations are proven be effective luminescence centers, which hinder development more ML phosphors. This study reports self‐recoverable deep‐red‐to‐near‐infrared Cr 3+ ‐doped LiGa 5 O 8 phosphor with fully recoverable performance. The performance can further optimized by...

Abstract Mechanoluminescence (ML) is one of the most important routes to realize remote sensing stress distribution, but has never been used in temperature sensing. Traditionally, and are separately realized through different methods multifunctional sensors, which definitely makes structure more complicated. In this work, stress–temperature dual‐modal proposed by using double‐lanthanide‐activated ML material SrZnSO:Tb,Eu, where read integral intensity displayed green red emission ratio ( I...

Tactile sensors with multimode sensing ability are cornerstones of artificial skin for applications in humanoid robotics and smart prosthetics. However, the intuitive interference-free reading multiple tactile signals without involving complex algorithms calculations remains a challenge. Herein pressure–temperature bimodal sensor any interference is demonstrated by combining fundamentally different mechanisms optics electronics, enabling simultaneous independent pressure temperature...

Endowing a single material with various types of luminescence, that is, exhibiting simultaneous optical response to different stimuli, is vital in fields. A photoluminescence (PL)- and mechanoluminescence (ML)-based multifunctional sensing platform built by combining heterojunctioned ZnS/CaZnOS:Mn2+ mechano-photonic materials using 3D-printing technique fiber spinning. ML-active particles are embedded micrometer-sized cellulose fibers for flexible devices capable emitting light driven...

Abstract Mechanoluminescence (ML), as an optical response to deformation stimuli, shows great potential in high‐end stress sensing, ultrasonic field visualization, and multidimensional anti‐counterfeiting. However, processive practical applications bio‐medicine are constrained by the discovery of near‐infrared (NIR) ML materials. Unlike lanthanides (Ln 3+ ) with sharp multiplets, two kinds Cr ‐doped NIR materials, gallate spinel (ZnGa 2 O 4 :Cr , Zn 3 Ga GeO 8 magnetoplumbite (SrGa 12 19...

Abstract Mechanoluminescence (ML) sensing technologies open up new opportunities for intelligent sensors, self-powered displays and wearable devices. However, the emission efficiency of ML materials reported so far still fails to meet growing application requirements due insufficiently understood mechano-to-photon conversion mechanism. Herein, we propose quantify ability different phases gain or lose electrons under friction (defined as triboelectric series), reveal that inorganic-organic...

Hybrid metal halides (HMHs) with efficient circularly polarized luminescence (CPL) have application prospects in many fields, due to their abundant host-guest structures and high photoluminescence quantum yield (PLQY). However, CPLs HMHs are predominantly excited by light or electricity, limiting use multivariate environments. It is necessary explore a novel excitation method extend the of chiral as smart stimuli-responsive optical materials. In this work, an enantiomeric pair 0D hybrid...

Abstract Self‐recoverable mechanoluminescence (ML) is becoming a novel technology widely used in the fields of sensing, display, and artificial intelligence. The dominant ML material, ZnS: Mn 2+ , reported to solely present yellow emission color, which limits applications self‐recoverable materials large extent. Herein, an effective strategy extend range by ferromagnetic coupling ions are reported. Under thermal carbon‐reduction atmosphere (TCRA), ranges ML, photoluminescence (PL),...

Abstract Elastico‐mechanoluminescence technology has shown significant application prospects in stress sensing, artificial skin, remote interaction, and other research areas. Its progress mainly lies realizing visualization 2D or even 3D stress‐sensing effects using a passive sensing mode. However, the widespread promotion of mechanoluminescence (ML) is hindered by issues such as high strain thresholds single mode based on luminous intensity. In this study, highly efficient green‐emitting ML...

Abstract Photochromic materials are widely used in optical data storage, encryption, and anti‐counterfeiting because of their ability to be written, erased, read repeatedly. However, conventional information encryption storage capabilities based on a “matrix” pattern 2D plane limited fewer dimensions, making less secure. Here, new concept expanding the dimensions is presented by manipulating rotation angle photochromic encoding disks principle absolute encoder. For this purpose, novel...

In this study, we report an Er-doped quaternary piezoelectric semiconductor CaZnOS:Er3+ which shows both mechanoluminescence and upconversion luminescence properties. Under mechanical stimulation, green light emission can be observed by the naked eye from a flexible film fabricated encapsulating particles between two polyethylene glycol terephthalate substrates. The integral intensity is proportional to applied pressure, making suitable for dynamic pressure sensing applications. Moreover,...

Mechanoluminescence (ML) is a phenomenon characterized by photon emission in response to mechanical stimulus. ML usually observed inorganic crystals that produce strain electric fields if deformed. After being doped with luminescent lanthanide and transition-metal ions, can be significantly enhanced rationally tuned, which leads promising applications, such as light sources, displays, advanced sensors probe the dynamic stress distribution over large area. This Minireview focuses on recent...

The photoluminescence of Pr doped (Bi0.5Na0.5)TiO3 ferroelectric ceramics prepared by conventional solid-state reaction were investigated. A bright red emission is observed at room temperature, which ascribed to 1D2→3H4 transition. excitation bands are mainly located 440 ∼ 505 nm, adaptable the band commercial blue light-emitting diodes (LEDs) chips. optimal intensity was also obtained when doping level 0.003 mol. Meanwhile, enhanced properties doping. results show that as a multifunctional...

With the capability of completing a task or achieving goal in an uncertain environment while simultaneously having characteristics adaptability, self‐optimization, self‐diagnostics, and self‐maintenance, intelligent systems have witnessed extraordinary progress recent years. These advances involve robotics, artificial intelligence machine learning, automation, human–machine interfaces, Internet Things, control theory systems, smart responsive materials, sensing programmed self‐assembly. As...

Abstract Recently, piezoelectric characteristics have been a research focus for 2D materials because of their broad potential applications. Black phosphorus (BP) is monoelemental material predicted to be its highly directional properties and non‐centrosymmetric lattice structure. However, piezoelectricity hardly reported in owing lack ionic polarization, but generation consistent with the structure BP. Theoretical calculations phosphorene explained origin polarization among P atoms....

We describe the use of a layer-by-layer hierarchical nanostructure to exploit synergy different lanthanide ions for converting single wavelength excitation into emissions spanning whole spectral region. By lining up set with matched energy levels in core–shell nanostructure, we demonstrate well-defined cascades transfer that gives access optical from large collection (Tb3+, Eu3+, Dy3+, Sm3+, Nd3+, Yb3+, and Er3+) after common sensitizer Ce3+ featuring broad absorption. Through optimization...

Abstract CsPbBr 3 shows great potential in laser applications due to its superior optoelectronic characteristics. The growth of wire arrays with well‐controlled sizes and locations is beneficial for cost‐effective largely scalable integration into on‐chip devices. Besides, dynamic modulation perovskite lasers vital practical applications. Here, monocrystalline microwire (MW) tunable widths, lengths, are successfully synthesized. These MWs could serve as high‐quality whispering‐gallery‐mode...

Abstract Visualization and noncontact sensing can be achieved based on multimode luminescent materials, which is essential to flexible optoelectronics, information encryption, infrastructure monitoring. However, the development of optical sensors primally limited by developing high‐performance functional materials with energy conversion. Here, codoping transition metal lanthanide ions into quaternary piezophotonic semiconductors MZnOS (M = Ca, Sr, Ba) microcrystals, efficient are...