Advanced Optical Materials
·
2023
·Vol. 11
·期 9
·2202673
·
IF 9
Xiao Yang,Zi-Jun Yan,Chen-Ming Zhong,Hui Jia,Guo-Long Chen,Xiao-Tong Fan,Shu-Li Wang,Ting-Zhu Wu,Yue Lin,Zhong Chen
High-resolution perovskite quantum dots (PeQDs) arrays printed by electrohydrodynamic (EHD) inkjet printing show great application prospects in fields of micro-display. Commonly, EHD inkjet requires a polar system for printing but it easily quenches the PeQDs. Meanwhile, the mismatch of solvent parameters causes uneven surface morphology and printing instability. In this work, a morphology uniformization strategy of a nonpolar binary solvent system of 1,3,5-triethylbenzene and n-tetradecane is proposed to prepare the didodecyldimethylammonium bromide (DDAB)/PbBr 2 passivated PeQDs inks. When the solvent volume ratio is 5:5, the photoluminescence quantum yield (PLQY) of the ink reaches 94.06%. Benefiting from the match of boiling point, surface tension, and dielectric constant of ink, after the EHD inkjet printing, the line width of continuous smooth line arrays is as narrow as 2.0 µm and the coffee effect of dot arrays is well inhibited. Meanwhile, derived from the strong electrostatic interaction between the π-electron structure of 1,3,5-triethylbenzene and DDA + , the ink exhibits high stability. Moreover, the high-resolution logo and miniature quick responsecode by EHD inkjet printing reach 22 718 dpi, far higher than that of the reported micro-LED. This work paves the way for high-resolution pixel arrays of micro-display.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Ji'an Song,Yan Gao,Zhichao Meng,Zelong Jiang,Xiaobing Cao,Qingguang Zeng,Tao Hu
All-inorganic metal halide perovskites have attracted extensively attentions because of superior optoelectronic properties. Presently, tremendous progress is reached in green and red emitting perovskites , while the explorations of blue emitting perovskites are lag behind, and it also faces low emission efficiency and long-term stability issues. In this work, nickel-bromide passivation strategy was proposed to improve optical properties and chemical stability of blue emitting CsPbBr 3 nanoplatelets (NPLs) with strong quantum-confinement effects. As a result of the repaired Br − vacancy on the surface of the NPLs and enhanced structural stability of CsPbBr 3 lattice by Ni 2+ doping, the emission efficiency of the NPLs is increased from 33.2% to 78%, and it can be stored up to 30 days without significant PL loss. Benefiting from the excellent overall performance, a liquid-type monochrome LED device fabricated by using the passivated CsPbBr 3 NPLs as blue color convector exhibits no emission saturation even the driving current reaches as high level as 190 mA. This work paves a new way for fabricating high-quality blue emitting NPLs with extraordinary properties.
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Nano Energy
·
2023
·
IF 17.6
Jingbo Yuan,Xiya Yang,Duo Zheng,Jiangtao Guo,Weize Lin,Jiawei Liao,Yudi Wang,L. Vaillant-Roca,Jialong Duan,Qunwei Tang
Silicon (Si) solar cell efficiently convert solar energy into electricity under the sun illumination , but its inherent intermittent power generation due to diurnal and seasonal cycle has usually allowed for the requirement for alternative power sources. Owing to the abundance, diversity and availability, rain drop energy is one of the most promising green energy sources. Hence, hybrid energy harvesting could be a promising strategy of achieving preferential hybrid performances without sacrificing the advantages in individual devices. Herein, we proposed a hybrid solar and rain energy harvesting device featuring the integration of triboelectric nanogenerator (TENG) top-cell and a crystalline Si solar cell bottom-cell by laminating perovskite quantum dots-embedded polydimethylsiloxane composite film (PQDP) onto the Si solar cell, which endows enhanced electrical output performances under rainy days. To overcome the limitation of low external quantum efficiency (EQE) in the ultraviolet region of the Si solar cell, the PCE of the hybrid solar cell is significantly enhanced from 18.47% of bare Si solar cell to 20.16% owing to the anti-reflection effect of PQDP film and the down-conversion property of CsPbBr 3 QDs doped with Ce 3+ ions. Meanwhile, this hybrid solar cell presents excellent durability after continuous measurement over 7 days. This tandem hybrid solar cell provides a promising strategy to simultaneously scavenging the solar and rain energy and boosting the power conversion efficiency by introducing the perovskite QDs without affecting the efficiency of bare Si solar cell.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yutong Zhao,Bo Lv,Wei Song,Jinkai Hao,Junfang Zhang,Zhigang Shao
Conventional high-temperature proton exchange membranes use phosphoric acid (PA) as a proton conductor . However, PA loss, poor mechanical stability, and catalyst poisoning represent major limitations. Solid acids are an alternative to PA that does not require humidification and is less prone to leaching. In this study, we prepared two composite membranes by high-temperature impregnation to investigate the effects of the structure of polybenzimidazole (PBI) on the anchoring of solid acids: a laboratory-synthesized m -PBI/CsH 5 (PO 4 ) 2 and the commercial OPBI/CsH 5 (PO 4 ) 2 . Compared to PA-doped membranes, CsH 5 (PO 4 ) 2 -doped membranes showed excellent mechanical properties , particularly m -PBI/CsH 5 (PO 4 ) 2 . Scanning electron microscopy and energy dispersive spectroscopy images showed that CsH 5 (PO 4 ) 2 was uniformly dispersed on the surface and cross-section of both membranes, conducive to the formation of proton transport channels following the CsH 5 (PO 4 ) 2 melting in both samples. The characterization of the physical structures proved the interaction between the imidazole ring and solid acid. Furthermore, the proton conductivity without humidification was similar in m -PBI/CsH 5 (PO 4 ) 2 and OPBI/CsH 5 (PO 4 ) 2 , demonstrating the suitability of m -PBI for fuel cells production. To test this, we assembled a m -PBI/CsH 5 (PO 4 ) 2 cell that showed competitive performances, with a peak power density of 361.28 mW cm −2 at 160 °C in H 2 /O 2 atmosphere.
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高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·500
·
IF 3.4
Maolin Liu,Changqing Lin,Weicheng Ou,Han Wang,Chunyang Pan,Yuchen Ji,Hehui Zheng
Metal halide perovskite quantum dots (PQDs) are widely used in the display field due to their excellent photoelectric properties, such as ultra-narrow half-peak widths and ultra-pure luminescence color purity. Inkjet printing, laser direct writing and electrospinning are all common methods for PQDs printing to prepare micropattern displays. In order to produce large-scale and high-resolution PQDs micropatterns, electrohydrodynamic (EHD) printing technology is capable of large-scale deposition of highly oriented nanofibers on rigid or pliable, flat or bent substrates with the advantages of real-time regulation and single control. Therefore, it has a lot of potential in the fabrication of pliable electronic devices for one-dimensional ordered light-emitting fibers. Polycaprolactone (PCL) as an EHD printing technology polymer material has the advantages of superior biocompatibility, a low melting point, saving energy and easy degradation. By synthesizing CsPbBr3quantum dots (QDs) and PCL composite spinning stock solution, we used the self-built EHD printing platform to prepare the PCL@CsPbBr3composite light-emitting optical fiber and realized the flexible display of high-resolution micropatterns in polydimethylsiloxane (PDMS) packaging. An x-ray diffractometer (XRD), scanning electron microscope (SEM) and photoluminescence (PL) were used to characterize and analyze the fiber’s morphology, phase and spectral characteristics. EHD printing technology may open up interesting possibilities for flexible display applications based on metal halide PQDs.Keywords:perovskite;flexible display;photoluminescent fibers;EHD;CsPbBr3
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xin Li,Jiale Liu,Guocan Jiang,Xinyu Lin,Jin Wang,Zhengquan Li
Aerogels, especially MXene aerogels, are an ideal multifunctional platform for developing efficient photocatalysts for CO 2 reduction because they are featured by abundant catalytic sites, high electrical conductivity, high gas absorption ability and self-supported structure. However, the pristine MXene aerogel has almost no ability to utilize light, which requires additional photosensitizers to assist it in achieving efficient light harvesting. Herein, we immobilized colloidal CsPbBr 3 nanocrystals (NCs) onto the self-supported Ti 3 C 2 T x (where T x represents surface terminations such as fluorine, oxygen, and hydroxyl groups) MXene aerogels for photocatalytic CO 2 reduction. The resultant CsPbBr 3 /Ti 3 C 2 T x MXene aerogels exhibit a remarkable photocatalytic activity toward CO 2 reduction with total electron consumption rate of 112.6 μmol g -1 h - 1 , which is 6.6-fold higher than that of the pristine CsPbBr 3 NC powders. The improvement of the photocatalytic performance is presumably attributed to the strong light absorption, effective charge separation and CO 2 adsorption in the CsPbBr 3 /Ti 3 C 2 T x MXene aerogels. This work presents an effective perovskite-based photocatalyst in aerogel form and opens a new avenue for their solar-to-fuel conversions.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yixuan Lv,Dandan Ma,Chao Yang,Kunli Song,Le Shi,Yonghong Cheng,Chunming Niu,Jian-Wen Shi
Lead-free halide perovskites have enormous superiority in photoelectric devices, but low photocatalytic hydrogen evolution (PHE) hinders their application in photocatalysis. Here, a heterojunction composed of CsCu 2 I 3 (CCI) perovskite and graphite carbon nitride (CN) is constructed by in-situ hot-injection method for the first time. The resultant CCI/CN presents a significantly enhanced PHE performance from hydroiodic acid (HI) splitting with a PHE rate of 2212 umol/g/h, which is four times higher than CCI and nearly ten times higher than CN. It is revealed that a unique N-I bond is formed by the connection of N in CN and I in CCI at the interface between CN and CCI, which serves as a fast channel for the transfer of photogenerated electrons to establish a type II mechanism, effectively promoting the PHE performance. This study provides ideas and methods for the construction of type II photocatalyst for hydrogen production using lead-free halide perovskite.
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ADVANCED MATERIALS
·
2023
·Vol. 35
·期 25
·2209452
·
IF 29.4
Pei Li,Wei Cheng,Yifan Zhou,Dong Zhao,Jun Liu,Lingxi Li,Xiaoping Ouyang,Bo Liu,Wenbao Jia,Qiang Xu,Kostya (Ken) Ostrikov
State-of-the-art thermal neutron scintillation detectors rely on rare isotopes for neutron capture, lack stability and scalability of solid-state scintillation devices, and poorly discriminate between the neutron and gamma rays. The boron nitride (BN)-CsPbBr 3 perovskite nanocomposite aerogel scintillator enables discriminative detection of thermal neutrons, features the largest known size (9 cm across), the lowest density (0.17 g cm −3 ) among the existing scintillation materials, high BN (50%) perovskite (1%) contents, high optical transparency (85%), and excellent radiation stability. The new detection mechanism relies on thermal neutron capture by 10 B and effective energy transfer from the charged particles to visible-range scintillation photons between the densely packed BN and CsPbBr 3 nanocrystals. Low density minimizes the gamma ray response. The neutrons and gamma rays are discriminated by complete decoupling of the respective single pulses in time and intensity. These outcomes open new avenues for neutron detection in resource exploration, clean energy, environmental, aerospace, and homeland security applications.
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高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 10
·e202204406
·
IF 2.1
Chibin Pu,Zhongxi Huang,Lihua Huang,Qian Shen,Changmin Yu
Graphical We firstly reported the direct detection and quantification of His-tagged protein based on intramolecular rigidification induced emission in dilute solution, achieved the real-time and fast fluorescent “On” response of His-tagged proteins in protein solution. Our probe could be used in fluorescent labeling of proteins with simple procedure, high quality and low background interference. Histidine tag (His-tag) is a representative epitope tag, which has been widely used in the purification or immobilization of recombinant proteins. In this study, a novel probe CTPE-IDA-Ni 2+ based on intramolecular rigidification induced emission for fluorescence detecting His-tagged proteins is successfully developed and experimentally demonstrated. This detecting system is based on TPE derivative incorporated IDA-Ni 2+ moiety for real-time detection of His-tagged proteins. In the presence of His-tagged proteins, the IDA-Ni 2+ -His-tag complex was formed, which restricted the rotation of two phenyl rings linked with TPE and subsequently resulting in the fluorescence turn on. Results have shown that our probe could directly detect His-tagged proteins with good selectivity and fast response within 10 min. In addition, we have proved that this system could be used in fluorescent labeling of His-tagged protein instead of traditional Western blot assay with simple procedure, high quality and low background interference, as well as without aggregation-caused quenching (ACQ) problems like some organic dyes.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10378-10385
·
IF 4
Guoxing Zhang,Dongliang Jiang,Xinghua Zhu,Yuemei Lan,Dong Wang,Xuejie Zhang,Bo Wang,Yan Gao,Qingguang Zeng,Yan Chen
Inorganic lead halide perovskite quantum dots (CsPbX3 QDs (X = Cl, Br, or I)) have attracted more and more attention due to their high absorption coefficient, narrow emission band, high quantum efficiency, and tunable emission wavelength. However, CsPbX3 QDs are decomposed when exposed to bright light, heat, moisture, etc., which leads to severe luminous attenuation and limits their commercial application. In this paper, CsPbBr3@glass materials were successfully synthesized by a one-step self-crystallization method, including melting, quenching and heat treatment processes. The stability of CsPbBr3 QDs was improved by embedding CsPbBr3 QDs into zinc-borosilicate glass. Then, the CsPbBr3@glass was combined with polyurethane (PU) to form a flexible composite luminescent film CsPbBr3@glass@PU. This strategy enables the transformation of rigid perovskite quantum dot glass into flexible luminescent film materials and further improves the photoluminescence quantum yield (PLQY) from 50.5% to 70.2%. The flexible film has good tensile properties, and its length can be strained 5 times as long as the original length. Finally, a white LED was encapsulated by combining CsPbBr3@glass@PU film and red phosphor K2SiF6:Mn4+ with a blue LED chip. The good performance of the obtained CsPbBr3@glass@PU film indicates that it has potential application in flexible liquid crystal displays (LCDs) as a backlight source.
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高影响因子
MACROMOLECULES
·
2023
·
IF 5.5
Gang Liu,Ronald G. Larson,Lei Li,Huan Luo,Xi He,Yanhua Niu,Guangxian Li
Polymerized ionic liquids (PILs) poly[1-(4-vinylbenzyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide] (P[VBMIM][TFSI]) covering a wide range of molecular weights are synthesized using reversible addition–fragmentation chain-transfer (RAFT) polymerization. The dependence of zero-shear viscosity on weight-average molecular weight (η0 ∼ Mwα) shows two power-law regimes corresponding to disentangled and entangled regimes with α = 1.1 ± 0.1 and 3.6 ± 0.4, as is typical for neutral entangled polymers. The entanglement molecular weight (Me,calc = 1.8 × 105 g/mol) of P[VBMIM][TFSI] estimated from the packing length p = 8.6 Å and Kuhn length b = 20 Å is consistent with the experimental result (Me,rheo = 1.6 × 105 g/mol) and is much higher than the most conventional uncharged polymers due to the bulkiness of the monomers. For entangled PIL samples, reversible strain-induced disentanglement is observed under large-amplitude oscillatory shear (LAOS) and strong strain hardening in extensional flow. The chain entanglement in high-molecular-weight P[VBMIM][TFSI] brings significant improvement in the mechanical strength and robust recoverability under cyclic stretch over that of the lower-molecular-weight, unentangled PILs, making high-molecular-weight P[VBMIM][TFSI] processable for high-performance electrolytes.
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 14
·4946-4952
·
IF 6.4
Tong Tong,Chang Liu,Jing Xu,Huihua Min,Su Chen,Yinong Lyu,Chongguang Lyu
Resistive random-access memories (ReRAMs) are considered as promising candidates for novel information storage techniques owing to their fast operation speed, simple structure and high integration density. Halide perovskites, with fast ion migration and facile fabrication, have been widely investigated as active layers for nonvolatile ReRAM devices. However, the ambient instability and toxicity of lead halide perovskites limit their further commercial application. In this work, for the first time, we report the ReRAM devices based on environmentally friendly and air-stable lead-free double perovskite Cs2AgEuBr6. We used a facile solution process method and vacuum sublimation to obtain Cs2AgEuBr6 crystals and fabricated a memory device based on high quality Cs2AgEuBr6 films. The memory device of the Au/Cs2AgEuBr6/ITO structure was designed in a cross-bar array architecture with the aim of simple operation and high integration. The resistive memory devices exhibited robust and reproducible bipolar switching behavior with a large ON/OFF ratio up to 104 and long retention time of 12 000 s. This study will inspire the further design of nonvolatile memory devices and other electronics using the novel lead-free halide perovskite.
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