Cheng-Yang Yue

A zero-dimensional hybrid Sn( ii ) bromide exhibits efficient broadband yellow emission with an 80.9% photoluminescence quantum yield and enables high-color-rendering white-light-emitting diodes.

Systematic dimensional regulation of low-dimensional metal halides remains challenging for establishing clear dimension–property relationships because changes in dimensionality are often accompanied by variations in chemical composition or inorganic building units. Herein, we realize systematic dimensionality regulation across 0D (DMP)2Cu2Cl6, 1D (DMP)Cu2Cl4, and 2D (DMP)Cu2Cl4 through a solvent-mediated structural engineering strategy, while preserving the same organic cation and local [Cu2Cl6] dimer building unit. This homologous series enables a more direct correlation between framework connectivity and structural and photophysical properties, including Cu···Cu contacts, band gaps, and photoluminescence associated with self-trapped excitons. The three compounds exhibit distinct Cu···Cu contacts and emission profiles, highlighting the influence of structural dimensionality and local coordination environments on their photoluminescence behavior.

Two pairs of Cu( i ) halides, (MOPPZ) ₂ Cu ₂ X ₆ and (MOPPZ) ₂ Cu ₄ X ₈ , exhibiting reversible structural transformation under external stimuli are synthesized using the same organic cation, achieving versatile anti-counterfeiting and X-ray imaging applications.

Large‐area flexible luminescent film plays an essential role in next‐generation applications of wearable optoelectronic and display technologies. Although perovskite nanocrystals based flexible light‐emitting diodes have been explored, their practical applications are hindered by aggregation caused luminescence quenching and serious toxicity of Pb ²⁺ ion. To address these issues, we herein take advantage of zero‐dimensional (0D) organic‐inorganic hybrid antimony halide as luminescent materials, achieving high‐performance flexible luminescent textiles. These [SbCl ₅ ] ²⁻ ‐based halides display strong broadband yellow to red emissions from self‐trapped excitons with near‐unity quantum yields. Subsequently, we successfully fabricate flexible nanofibers, large‐area film, and wearable textiles by combining these halide nanoparticles and polymers through typical electrospinning technology. These flexible devices still display highly efficient and stable luminescence with excellent mechanical bendability, stretchability, foldable feature, and water resistance. Meanwhile, multicolor luminescent inks were also assembled to print deformable luminescent anti‐counterfeiting pattern. Furthermore, these flexible membranes exhibit exceptional scintillation performance with high light yield (28 500 photons·MeV ⁻¹ ), low detection limit (71 nGyair·s ^{− 1} ), and robust radiation resistance, enabling high‐resolution curving X‐ray imaging (16.8 lp/mm) for medical diagnosis and nondestructive inspection. This work represents a significant step toward real applications of 0D metal halide in dual‐mode flexible displays and X‐ray visualization, paving the way for multifunctional wearable optoelectronic systems.

Emerging luminescence metal halides with thermal‐ and excitation‐dependent (Ex‐De) luminescence are highly desirable for multifunctional optoelectronic devices, yet this goal remains unrealized in low‐dimensional systems. Herein, by manipulating excited‐state structural deformability to fine‐tune multiple triplet excitons, we present a hybrid Cu(I)‐based halide of [4‐APD] ₃ Cu ₂ Br ₆ ·2Br with adjustable photoluminescence and radioluminescence properties. [4‐APD] ₃ Cu ₂ Br ₆ ·2Br demonstrates unusual Ex‐De multicolor luminescence from blue, green to orange in the range of 80–300 K by breaking the limit of Kasha's rule, synchronously achieving pure white‐light emission with ultra‐high quantum yield. Furthermore, three emission bands show distinct temperature‐dependent intensity and lifetime in a wide range of 80–400 K due to reversible energy transfer among different excited states. Leveraging this unique thermal‐responsive luminescence, we fabricate multimodal luminescence ratiometric and lifetime thermometers with ultrahigh relative sensitivities of 13.14%·K ⁻¹ , surpassing most of metal halides‐based luminescent thermometers. In addition, high‐precision luminescence temperature sensing was successfully conducted with the lowest measurement deviation of 0.99%. The efficient broadband emission also delivers promising scintillation performance with high light yield (11 000 photons·MeV ⁻¹ ), low detection limit (1.43 µ Gy _air ·s ⁻¹ ) and high‐resolution X‐ray imaging (14 lp mm ⁻¹ ). This work provides a new strategy for the design of hybrid Cu(I) halide with adjustable luminescence performance for multifunctional optoelectronic applications.

Low‐dimensional organic‐inorganic hybrid halides have emerged as a new kind of promising scintillators owing to their high light output and tunable emission across the full visible spectrum. Exploration of new Cu‐based halides for x‐ray applications has become a current research hotspot. Herein, we performed a solvent‐mediated structural design strategy and prepared two new Cu(I)‐based halides of (AEMP) ₄ [Cu ₂ Br ₆ ] ₃ and (AEMP)[Cu ₃ Br ₆ ]·H ₂ O (AEMP = 1‐(2‐Aminoethyl)‐4‐Methyl‐Piperazine), in a system. Interestingly, (AEMP) ₄ [Cu ₂ Br ₆ ] ₃ contains 0D [Cu ₂ Br ₆ ] ⁴⁻ dimer, while (AEMP)[Cu ₃ Br ₆ ]·H ₂ O is composed of 1D [Cu ₃ Br ₆ ] ³⁻ chain building from corner‐shared [Cu ₃ Br ₆ ] trimers. In contrast to unstable (AEMP) ₄ [Cu ₂ Br ₆ ] ₃ , (AEMP)[Cu ₃ Br ₆ ]·H ₂ O exhibits stable and highly efficient photoluminescence and radioluminescence emission with a near‐unity photoluminescence quantum yield of 99.45% and a promising radioluminescence light yield of 27,185 photons MeV ⁻¹ , respectively. Meanwhile, the detection limit of 66.31 n Gy _air s ⁻¹ is much lower than the x‐ray dose required for diagnosis (5.5 µ Gy _air s ⁻¹ ). A flexible film with excellent foldability and crack resistance was fabricated for x‐ray imaging, which achieves a high spatial resolution of 10 lp mm ⁻¹ . Combining multiple advantages, including low cost, high luminescence efficiency, and excellent scintillation performance, enable this cuprous halide to stand out as a promising x‐ray scintillator.

Zero-dimensional (0D) organic–inorganic metal halides (OIMHs) have recently emerged as a highly promising platform for advanced photonic applications owing to their structural tunability and exceptional luminescence properties, particularly in the field of room-temperature phosphorescence (RTP). In this study, we report successful syntheses of three new 0D indium-based OIMHs, namely, [2-AMP]₂InCl₆·Cl, [3-APD]₃InCl₆·Cl₃, and [4-APD]₂InCl₆·Cl via a facile low-temperature solvothermal method. By rationally incorporating inorganic metal halide units into organic matrices, a moderate spin–orbit coupling (SOC) effect is achieved to evidently promote intersystem crossing and suppress nonradiative recombination. Under UV excitation, the resulting single crystals exhibit intense blue fluorescence with a maximum photoluminescence quantum yield (PLQY) of 43.6% and short nanosecond-scale lifetimes. Remarkably, these materials also display bright and durable green RTP with finely tunable lifetimes across a wide range from 80.7 to 168.66 ms and the highest phosphorescence quantum yield of 5.48%. Comprehensive photophysical investigations reveal that the introduction of inorganic skeletons promotes the generation of triplet state electrons, which is crucial for stabilizing the RTP phenomenon. Leveraging the distinct dual-emission colors and varied phosphorescence lifetimes, we designed advanced anticounterfeiting tags and multilevel information encryption technologies. This work not only establishes new efficient In-based RTP materials but also advances the RTP materials toward next-generation optical security applications.

New (C ₇ H ₁₈ N ₂ )MBr ₄ (M = Cd, Zn, and Mn) hybrids show bright blue/green photoluminescence. Cd- and Zn-based halide powders exhibit another red luminescence from defect-induced self-trapped excitions, promising for lighting and anti-counterfeiting.

Mn ²⁺ -doped [BuTPP] ₂ MBr ₄ (M = Zn, Cd) halides show dual band luminescence from host STEs and Mn ²⁺ d–d transitions. Blue emission fades as rising temperature, enabling reversible blue-to-green switching for sensitive ratiometric temperature sensing.

Centimeter-sized, water-resistant blue-light-emitting (MAPPA)CdBr ₄ ·H ₂ O hybrid halides exhibiting remarkable environmental stability and a high color rendering index for next-generation solid-state lighting applications.