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Perovskites
In article number 2307960, Xiao Wang, Longbin Qiu, and co‐workers developed an ultrahigh humidity treatment strategy to facilitate the effective diffusion of formamidinium iodide from the top surface to the buried bottom interface on the sequential vapor‐deposited bilayer structure. High‐efficiency and stable perovskite solar cells deposited by a sequential vapor deposition process with...
The quality of two‐step processed perovskites is significantly influenced by the distribution of organic amine salts. Especially, modulating the distribution of organic amine salts remains a grand challenge for sequential vapor‐deposited perovskites due to the blocking effect of bottom compact PbI2. Herein, an ultrahigh humidity treatment strategy is developed to facilitate the diffusion of formamidinium...
The promising cyclometalated iridium (III) complexes have been proved to possess great potential in vacuum−deposited organic light−emitting diodes (OLEDs) applications for full−color displays and white solid−state lighting sources. Herein, based on the unique bidentate ligand of dibenzo[a,c]phenazine (dbpz) group with strong conjugated effect of aromatic rings for red emission, four novel [3+2+1]...
Transition metals are excellent active sites to activate peroxymonosulfate (PMS) for water treatment, but the favorable electronic structures governing reaction mechanism still remain elusive. Herein, the authors construct typical d‐orbital configurations on iron octahedral (FeOh) and tetrahedral (FeTd) sites in spinel ZnFe2O4 and FeAl2O4, respectively. ZnFe2O4 (136.58 min−1 F−1 cm2) presented higher...
The preservation and accessibility of pores are prerequisites to the application of metal–organic frameworks (MOFs). Activation is a key step to eliciting rich features of pores, but it needs a repeated solvent‐exchange process which is tedious and time/cost‐consuming. Herein, a facile strategy for highly‐efficient activation of MOFs utilizing rotating packed bed is proposed. With the tremendous enhancement...
Sodium manganese hexacyanoferrate (NaMnHCF) is an attractive candidate as a cathode material for sodium‐ion batteries due to its low cost and high energy density. However, its practical application is hindered by poor electrochemical stability caused by the Jahn‐Teller effect of Mn and the unstable structure of NaMnHCF. Here, this paper aims to address this issue by introducing highly stable AMnHCF...
Perovskite solar cells have rapidly developed as a promising technology for the next generation of low‐cost photovoltaics, receiving enormous attention from researchers and industries. Compared to traditional semiconducting materials, metal halide perovskite exhibits outstanding tolerance to extrinsic ions. At a certain range of doping concentration, the interstitial occupancy of extrinsic ions provides...
Electronic skin (E‐skin) with multimodal sensing ability demonstrates huge prospects in object classification by intelligent robots. However, realizing the object classification capability of E‐skin faces severe challenges in multiple types of output signals. Herein, a hierarchical pressure–temperature bimodal sensing E‐skin based on all resistive output signals is developed for accurate object classification,...
Artificial Sensory Neural Network Systems
In article number 2301196, Chun Zhao, Xin Wang, and co‐workers develop an artificial sensory neural network system, combining digital‐analog bimodal memristor with piezoresistive tactile sensory array, to achieve tactile sensing, information storage, and neuromorphic computing, which would demonstrate potential in human‐machine interaction, prosthetics, and...
Memristor with digital and analog bipolar bimodal resistive switching offers a promising opportunity for the information‐processing component. However, it still remains a huge challenge that the memristor enables bimodal digital and analog types and fabrication of artificial sensory neural network system. Here, a proposed CsPbBr3‐based memristor demonstrates a high ON/OFF ratio (>103), long retention...
Efficient Perovskite Solar Modules
In article number 2301110, Sisi He, Longbin Qiu, and co‐workers design a controllable release and deposition of Ni2+ by adding amino‐alcohol ligands, which enhance the anti‐sedimentation of the precursor solution during chemical bath deposition and the uniformity of the deposited hole transport layer with large area. The authors fabricate highly reproducible and...
A scalable and low‐cost deposition of high‐quality charge transport layers and photoactive perovskite layers are the grand challenges for large‐area and efficient perovskite solar modules and tandem cells. An inverted structure with an inorganic hole transport layer is expected for long‐term stability. Among various hole transport materials, nickel oxide has been investigated for highly efficient...
Water Splitting
In article number 2208270, Lei Li, Li Song, and co‐workers provide a combined strategies of P‐Se binary vacancies and heterostructures to improve the hydrogen evolution performance of MoP/MoSe2‐H electrocatalysts, which present ultra‐low overpotential and is comparable to commercial Pt/C. A more efficient, safer and cheaper Zn‐H2O battery with MoP/MoSe2‐H as cathode is fabricated for...
It is not enough to develop an ideal hydrogen evolution reaction (HER) electrocatalysts by single strategy. Here, the HER performances are significantly improved by the combined strategies of P and Se binary vacancies and heterostructure engineering, which is rarely explored and remain unclear. As a result, the overpotentials of MoP/MoSe2‐H heterostructures rich in P and Se binary vacancies are 47...
Identifying and removing microplastics (MPs) from the environment is a global challenge. This study explores how the colloidal fraction of MPs assemble into distinct 2D patterns at aqueous interfaces of liquid crystal (LC) films with the goal of developing surface‐sensitive methods for identifying MPs. Polyethylene (PE) and polystyrene (PS) microparticles are measured to exhibit distinct aggregation...
The well‐defined 2D or 3D structure of covalent organic frameworks (COFs) makes it have great potential in photoelectric conversion and ions conduction fields. Herein, a new donor–accepter (D–A) COF material, named PyPz‐COF, constructed from electron donor 4,4′,4″,4′″‐(pyrene‐1,3,6,8‐tetrayl)tetraaniline and electron accepter 4,4′‐(pyrazine‐2,5‐diyl)dibenzaldehyde with an ordered and stable π‐conjugated...
The threshold voltage (Vth) adjustment of complementary metal‐oxide‐semiconductor (CMOS) thin film transistors (TFTs) is one of the research hotspots due to its key role in energy consumption control of CMOS circuits. Here, ultralow‐power flexible CMOS circuits based on well‐matched enhancement‐mode (E‐mode) CMOS single‐walled carbon nanotube (SWCNT) TFTs are successfully achieved through tuning the...
Enhancing the catalytic activity of Pt‐based alloy by a rational structural design is the key to addressing the sluggish kinetics of direct alcohol fuel cells. Herein, a facile one‐pot method is reported to synthesize PtCuRu nanoflowers (NFs). The synergetic effect among Pt, Cu, and Ru can lower the d‐band center of Pt, regulate the morphology, generate Ru‐rich edge, and allow the exposure of more...
Selective electrocatalytic nitrate‐to‐ammonia conversion holds significant potential in treatment of nitrate wastewater and simultaneously produces high‐value‐added ammonia. However, today's development of nitrate‐to‐ammonia technology remains hindered by the lack of electrocatalysts with high activity and selectivity. In this work, metal‐organic framework‐derived CuPd bimetallic nanoparticles/nitrogen‐doped...
The design of efficient and sustainable Pt‐based catalysts is the key to the development of direct methanol fuel cells. However, most Pt‐based catalysts still exhibit disadvantages including unsatisfied catalytic activity and serious CO poisoning in the methanol oxidation reaction (MOR). Herein, highly porous PtAg nanoflowers (NFs) with rich defects are synthesized by using liquid reduction combining...
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