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Sulfide solid electrolytes (SSEs) have become an ideal candidate material for all‐solid‐state Li metal batteries (ASSLMBs) because of their high ionic conductivity. However, the vile Li incompatibility and poor air stability of SSEs barriers their commercial application. Herein, novel Li6+2xP1−xInxS5−1.5xO1.5xCl (0 ≤ x ≤ 0.1) SSEs are synthesized via In and O co‐doped Li6PS5Cl. By regulating the substitution concentration, the prepared Li6.12P0.92In0.08S4.88O0.12Cl exhibits considerable ionic conductivity (2.67 × 10−3 S cm−1) and enhanced air stability. Based on the first‐principles density functional theory (DFT) calculation, it is predicted that In3+ replaces P5+ to form InS45− tetrahedron and O2− replaces S2− to form PS3O4− group. The mechanism of enhancing air stability by In, O co‐substituting Li6PS5Cl is clarified. More remarkably, the formation of Li‐In alloys induced by Li6.16P0.92In0.08S4.88O0.12Cl electrolyte at the anode interface is beneficial to reducing the migration barrier of Li‐ions, promoting their remote migration, and enhancing the stability of the Li/SSEs interface. The optimized electrolyte shows superior critical current density (1.4 mA cm−2) and satisfactory Li dendrite inhibition (stable cycle at 0.1 mA cm−2 over 3000 h). The ASSLMBs with Li6.16P0.92In0.08S4.88O0.12Cl electrolyte reveal considerable cycle stability. This work emphasizes In, O co‐doping to address redox issues of sulfide electrolytes. [ABSTRACT FROM AUTHOR]

Skin‐like stretchable tactile arrays are of paramount significance for perceiving physical interactions in dynamic biological tissues, prosthetic limbs, and robots. However, mechanical strain‐induced interference invariably degrades the pressure‐sensing accuracy of tactile arrays. In this work, an omnidirectionally strain‐unperturbed tactile array is prepared through modulus regulation in quasi‐homogeneous elastomer meshes. By varying fiber orientations, the proportion of intrinsic elastic and structural deformations in quasi‐homogeneous elastomer meshes can be adjusted, and the modulus can be regulated from 0.23 to 8.23 MPa. The tactile array combined with low‐ and high‐modulus elastomer meshes enables strain‐unperturbed pressure sensing through local stiffening and controllable deformation. Remarkably, the tactile array exhibits 97% strain insensitivity when stretched 100% along the omniplane directions. Moreover, the quasi‐homogeneous structure endows the tactile array with high robustness, even after 5000 cycles of severe stretching or pressing. By integrating the tactile array with a microcontroller, a tactile visualization system is built to achieve accurate tactile interaction even under multiaxial tensile strain. This work provides an alternative insight into the design of omnidirectionally strain‐unperturbed electronic devices for wide applications on dynamic surfaces. [ABSTRACT FROM AUTHOR]

Stimulus‐responsive photoluminescent materials have attracted extensive research attention in recent years owing to their potential application in information storage and switch devices. It is important to further explore such bistable materials as well as the underlying transformation mechanisms. Herein, the syntheses and mechanically tunable "on–off" photoluminescence (PL) of two organic–inorganic hybrid metal halides, (Bmpip)9Pb3Zn2Br19 and (Bmpip)9Pb3Cd2Br19 (Bmpip+ = 1‐butyl‐1‐methyl‐piperidinium, C10H22N+), are reported. Both as‐obtained compounds are nonemissive under UV light at ambient conditions but exhibit bright PL upon grinding or under hydrostatic pressure. Interestingly, the PL is quenchable by short‐time annealing or storage in air for 1 week, and the process is repeatable. Through a combination of extensive structural and spectral analyses, the crucial role of the organic cations interacting with inorganic chromophores in the "on–off" PL behavior of the title compounds is revealed. Moreover, pressure‐induced PL and PL‐enhancement phenomena are observed in both compounds, which are similar to but slightly different than the above‐mentioned mechano‐PL. Finally, proof‐of‐concept devices are fabricated to demonstrate the potential applications of the title compounds in message recording and force sensing. [ABSTRACT FROM AUTHOR]

Ionic skin with ionic mechanotransduction similar to human skin can perceive stimuli by ionic conduction, holding great potential in novel human‐machine interactions. However, the high‐density integration of ionic skins still faces significant challenges due to the difficulty in fabricating high‐density patterned ionogel arrays with simple manufacturing processes. Herein, the study reports a high‐density ionic skin (HI‐Skin) based on ionogel array patterned by direct microlithography. The photosensitive ionogel (PIG) is synthesized by rapid ultraviolet‐induced in situ photopolymerization process. The direct microlithography of PIG is developed, which allows to directly pattern ionogel precursors by selective exposure to ultraviolet light and development. Simple and low‐cost preparation of PIG array with the minimum line width of 200 µm is realized. Furthermore, HI‐Skin is constructed by integrating patterned PIG arrays with row and column electrodes, and the density is up to 49/cm2. The HI‐Skin demonstrates high sensitivity of 126.8 kPa−1 and low crosstalk of −8.93 dB. By integrating the HI‐Skin and a microcontroller, a multichannel signal acquisition system is built to achieve detection of multiple motion trajectories. This work opens an avenue for the simple construction of high‐density ionic skin. [ABSTRACT FROM AUTHOR]

Organic-inorganic metal halides (OIMHs) have various crystal structures and offer excellent semiconducting properties. Here, we report three novel OIMHs, (PPA) 6 InBr 9 (PPA = [C 6 H 5 (CH 2 ) 3 NH 3 ] + ), (PBA) 2 SbBr 5 , and (PBA) 2 SbI 6 (PBA = [C 6 H 5 (CH 2 ) 4 NH 3 ] + ), showing typical zero-dimensional (0D) structure, octahedra dimers, and corner-sharing one-dimensional chains and crystallized in the monoclinic system with P 2 1 , P 2 1 / c , and C 2/ c space groups, respectively. (PPA) 6 InBr 9 , (PBA) 2 SbBr 5 , and (PBA) 2 SbI 6 have experimental optical band gaps of ∼3.16, ∼2.24, and 1.48 eV, respectively. (PPA) 6 InBr 9 exhibits bright-orange light emission centered at 642 nm with a full-width at half-maximum of 179 nm (0.51 eV) and a Stokes shift of 277 nm (1.46 eV). After Sb 3+ doping, the peak position did not change, and the photoluminescence quantum yield increased significantly from 9.2 to 53.0%. The efficient emission of Sb:(PPA) 6 InBr 9 stems from the isolated ns 2 luminescent center and strong electron-phonon coupling, making the spin-forbidden 3 P 1 - 1 S 0 observable. By combining commercial blue and green phosphors with orange-red-light-emitting (PPA) 6 In 0.99 Sb 0.01 Br 9 , a white-light-emitting diode was constructed, with the color-rendering index reaching up to 92.3. Our work highlights three novel 0D OIMHs, with chemical doping of Sb 3+ shown to significantly enhance the luminescence properties, demonstrating their potential applications in solid-state lighting.

Low-dimensional organic-inorganic metal halides (OIMHs), as emerging light-emitting materials, have aroused widespread attention owing to their unique structural tunability and photoelectric characteristics. OIMHs are also promising materials for optoelectronic equipment, light-emitting diodes, and photodetectors. In this study, (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 (C 3 H 12 N 2 2+ is an N -methylethylenediamine cation), a new zero-dimensional OIMH, has been reported, and (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 possesses a P 2 1 / n space group. The (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 structure contains [Sb 2 Cl 10 ] 4- dimers (composed of two edge-sharing [SbCl 6 ] 3- octahedra) that are surrounded by C 3 H 12 N 2 2+ cations. The experimental band gap of (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 is 3.80 eV, and density functional theory calculation demonstrates that (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 possesses a direct band gap, with the edge of the band gap mainly contributed from the inorganic units. (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 exhibits good ambient and thermal stability. Under 395 nm excitation at room temperature, (C 3 H 12 N 2 ) 2 Sb 2 Cl 10 exhibits a broad emission with a full width at half-maximum of ∼114 nm, peaking at 480 nm, and the broad emission was ascribed to self-trapped exciton emission.