Nano Energy
·
2023
·
IF 17.6
Tao Wang,Daming Zheng,Karol Vegso,Nada Mrkyvkova,Peter Siffalovic,Xiaocong Yuan,Michael G. Somekh,Laurent Coolen,Thierry Pauporte,Feng Fu
Metal halide perovskites are attracting increasing attention as photodetectors (PDs) materials due to their excellent photoelectric properties. However, integrating perovskite to realize high-resolution perovskite pixel arrays remains critical to enable practical devices. Herein, we demonstrate a high-responsivity and stable 10 × 10 flexible PDs array based on formamidinium-based quasi-2D Ruddlesden-Popper (BA) 2 FAPb 2 I 7 (n = 2) (BA= butylammonium, C 4 H 9 NH 3 + ) perovskite elements for image sensing. The high-performance (BA) 2 FAPb 2 I 7 arrays are synthesized on a polyethylene terephthalate (PET) flexible substrate , on a large scale, high quality, and controllable manner by introducing Au nanoparticles to enhance film quality upon the annealing process and recrystallization by applying formamidinium chloride (FACl) post-treatment to reduce perovskite film defects, combined with an innovative SiO 2 -assisted hydrophilic and hydrophobic surface treatment strategy. The prepared flexible PDs arrays show excellent optoelectronic properties with high responsivity (5.9 A W −1 ), a detectivity of 8.2 × 10 12 Jones, large on/off current ratio (up to 3 × 10 4 ), ultimate response speed (12.8 μs/10.1 μs), and wide spectral response range. In addition, the device shows outstanding mechanical stability under severe bending (θ = 120°) and excellent folding durability after thousands of bending cycles. It also exhibits excellent environmental stability with only a slight degradation of photoresponse after 100 days of storage under the ambient environment. Finally, the integrated flexible PDs arrays can be used as an effective visible light image sensor with good spatial resolution, paving a multifunctional and competitive way for future wearable sensors and artificial vision systems. One-sentence summary Low-dimensional halide perovskite layers pixelized on a polyethylene terephthalate (PET) flexible substrate provide high performance photodetectors.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Ningxia Gu,Lixin Song,Pengyun Zhang,Ye Feng,Pingfan Du,Yongjun Zhu,Lei Ning,Zeyuan Sun,Hua Jiang,Jie Xiong
Electron transport layer (ETL)-free perovskite solar cells (PSCs) have garnered significant attention due to their simple manufacturing process. However, containing ETL results in blocking holes and suppressing charge recombination. Herein, the titanium dioxide (TiO2)-doped carbon nanofibers (TiO2/C NFs) via electrospinning were introduced into the perovskite absorber layer. The one-dimensional TiO2/C NFs provided an additional charge transport channel to promote the carrier transfer and suppress nonradiative recombination. Carbon nanofibers with high conductivity could also improve the electrical conductivity of perovskite. Moreover, TiO2/C NFs functioned as the nucleation sites to regulate the preferred orientation of perovskite crystals. Finally, the power conversion efficiency (PCE) of rigid PSCs with TiO2/C NFs was significantly improved from 18.07 to 19.81%, with an enhanced stability of only 11% degradation after exposure to an ambient environment for 300 h. In addition, the TiO2/C NFs-optimized flexible devices exhibited a PCE of 17.61%. Highly flexible TiO2/C NFs incorporating effectively improved the bending stability, wherein the flexible PSCs without and with TiO2/C NFs retained 84.27 and 48.33% of the original PCE after 6000 bending cycles (radius: 3 mm), respectively. This work highlights a significant application of TiO2/C NFs in developing high-efficiency and well-stability minimalist PSCs.
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MICROCHEMICAL JOURNAL
·
2023
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IF 4.8
Yi Li,Xinze Wu,Hui Lyu,Huaixia Chen,Xueping Dang
A novel polyaniline (PANI) coating doped with Zn 5 (H 2 L n ) 6 (NO 3 ) 4 (Zn 5 , H 3 L n =(1,2-bis(benzimidazole-2-yl)-ethenol) cluster on a stainless-steel wire was prepared by the electrodeposition method for the headspace solid-phase microextraction (HS-SPME) of nine volatile phenols. Scanning electron microscopy, Fourier transform infrared spectrometry, energy dispersive spectrometry and thermogravimetry were employed to characterize the morphology, composition, structure and thermal stability of the Zn 5 /PANI composite coating. The extraction efficiency of the Zn 5 /PANI composite coating for nine phenols was nearly 2 times higher than that of pure PANI coating. After the extraction conditions were optimized, an HS-SPME-gas chromatography-flame ionization detector (GC-FID) method was developed for the determination of nine phenols in water samples. The HS-SPME-GC-FID method had superior analytical performance with good linearities (0.05–50.0 μg/L) and low limits of detection (0.01–0.08 μg/L). Then, the proposed method was successfully applied for the determination of nine phenols in water samples with satisfactory recoveries (79.4–110.0%).
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APL Photonics
·
2023
·Vol. 8
·期 7
·
IF 5.6
Zeng Zhihao,Li Xiangping,Wang Haiwei,Xie Changsheng
Nanoscale patterning of fullerene materials with peculiar intrinsic electronic and optical properties is of crucial importance for their widespread applications. However, it remains a daunting challenge for current methods that suffer from both complicated lithography procedures and additives of photopolymers or photochemicals detrimental to the pristine properties of fullerene. Here, we developed a contamination-free laser printing approach for in situ patterning of fullerene with nanoscale resolution and high purity. The optical trapping force within the tight focus provides a lithography-free means to form densely packed fullerene nanostructures with two-order-of-magnitude enhanced fluorescence emission and a surface roughness of 6 nm. In addition, versatile fullerene nano-patterns from dots to concentric rings can be realized by flexibly shaping the optical trapping force of higher-order Laguerre–Gaussian beams. These results open a new route to programmable and high-quality patterning of fullerene optoelectronic devices with complex nanostructures.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haiyan Cao,Yuwan Lu,Xiaodan Zhang,Wenfei Dong,Wenbing Shi,Yuming Huang
The extensive applications of peroxymonosulfate (PMS) in the field of environmental pollutant treatment based on advanced oxidation processes (AOPs) have prompted a high demand for advances in the probe ranging from improving their performances to strengthening their practicalities. Here, a multisignal-output probe of PMS was achieved by the unconventional application of traditional chromogenic system, 3,3′,5,5′-tetramethylbenzidine with Co 2+ ions (Co 2+ -TMB). It works on the trace Co 2+ -catalyzed specific conversion of a colorless TMB into a blue oxidation product (oxTMB) with PMS as the oxidizing agent , accompanied by the enhanced absorption value of oxTMB at 652 nm and decreased fluorescence intensity of TMB at 405 nm. The change of color was directly observed. The combination of a hydrogel with a colorimetric platform favors the real-time and convenient sensing of PMS in the concentration range of 0.98 to 130.29 μM. A good linear relationship between the PMS concentration and both the absorption and fluorescence intensity was obtained with an r 2 value of 0.999, and a detection limit of 0.03 μM for fluorescence and 0.11 μM for spectrometry . Such a multisignal output probe with the advantages of simplicity, convenience, high sensitivity and stability improves the reliability and practical adaptability. This study successfully applied a valuable strategy for sensing PMS, and verified its availability in detecting the residual quantity of PMS in pollutant water treated by AOPs and PMS concentrations in actual water samples with peroxydisulfate (PDS).
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Science Advances
·
2023
·Vol. 9
·期 28
·
IF 13.6
Tianling Qin,Ge Mu,Pengfei Zhao,Yimei Tan,Yanfei Liu,Shuo Zhang,Yuning Luo,Qun Hao,Menglu Chen,Xin Tang
Colloidal quantum dot (CQD)–based photodetectors are promising alternatives to bulk semiconductor-based detectors to be monolithically integrated with complementary metal-oxide semiconductor readout integrated circuits avoiding high-cost epitaxial growth methods and complicated flip-bonding processes. To date, photovoltaic (PV) single-pixel detectors have led to the best performance with background-limit infrared photodetection performance. However, the nonuniform and uncontrollable doping methods and complex device configuration restrict the focal plane array (FPA) imagers to operate in PV mode. Here, we propose a controllable in situ electric field–activated doping method to construct lateral p-n junctions in the short-wave infrared (SWIR) mercury telluride (HgTe) CQD–based photodetectors with a simple planar configuration. The planar p-n junction FPA imagers with 640 × 512 pixels (15-μm pixel pitch) are fabricated and exhibit substantially improved performance compared with photoconductor imagers before activation. High-resolution SWIR infrared imaging is demonstrated with great potential for various applications including semiconductor inspection, food safety, and chemical analysis.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yingwei Li,Hao Li,Kexin Li,Ruirui Wang,Ruirui Zhang,Ruixia Liu
Nanostructured cerium-based catalytic materials have attracted much attention in the field of redox catalysis, due to the excellent active sites exposed on the nanocrystal surface, and herein, the oxygen vacancy (OV) and the crystal facet effect of typical model nanostructured ceria (Nano-CeO2) were focused and investigated for the catalytic aerobic cyclohexane oxidation. Specifically for the CeO2 nanocubes with a {100} facet, the CeO2 nanopolyhedrons with a dominant {111} facet, and the CeO2 nanorods with a dominant {110} facet, the catalytic roles of the OV and acid sites toward cyclohexane oxidation were systematically investigated. Surface oxygen vacancy (Sur-OV) and intrinsic oxygen vacancy (Int-OV), and particularly the active Sur-OV and active Int-OV performing catalytic activity under a working state specific for cyclohexane oxidation, were accurately recognized and distinguished. Furthermore, the activation ability of the OV sites for activating molecular oxygen into active oxygen species (OActive) was also revealed, and the acid site properties, which include the acidity and the types of acid sites, were probed and quantified. The Nano-CeO2 with an exposed {100} facet possesses the most active Sur-OV, determining the catalytic activity, and has the strongest activation ability, contributing to a high reaction activity under extremely inert conditions. The Nano-CeO2 with a {110} dominant facet with the most active Int-OV and abundant acid sites could accelerate further oxidation to adipic acid; the effect of the two key sites was described particularly by the α factor (= Total Acidity × Amount of Active Int-OV). Finally, the property–performance relationship toward cyclohexane oxidation was speculated based on the Nano-CeO2 catalytic system.
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Laser & Photonics Reviews
·
2023
·Vol. 17
·期 8
·2300371
·
IF 11
Haotao Li,Shiming Zhou,Shuming Chen
Top-emitting (TE) quantum-dot light-emitting diodes (QLEDs) can exhibit higher light outcoupling efficiency (OCE) compared to bottom-emitting (BE) QLEDs due to the eliminated substrate mode and enhanced microcavity effect. In this study, TE QLEDs with an OCE of over 45% are realized by simultaneously optimizing the thicknesses of both indium-zinc-oxide (IZO) phase tuning layers and IZO top transparent electrodes. To reduce the resistance, the IZO top electrodes are equipped with an auxiliary metal electrode. Consequently, the red QLEDs demonstrate a high external quantum efficiency (EQE) of 38.2%. Furthermore, by applying a scattering layer on the IZO top electrode, the red QLEDs demonstrate record-breaking efficiencies of EQE 44.5%, power efficiency 92.2 lm W −1 , and current efficiency 93.7 cd A −1 . The proposed device architecture and optimization strategy contribute to a new design scheme for the preparation of highly efficient QLEDs for displays and lighting applications.
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NANOTECHNOLOGY
·
2023
·Vol. 34
·期 44
·445401
·
IF 3.5
Xinlei Gan,Xuefeng Peng,Yinxia Han,Yanjun Xing,Jiaxing Xiong,Qiuxiang Wang,Jing Zhang,Yuejin Zhu
Recently, narrow bandgap tin–lead mixed perovskite solar cells (PSCs) have become a research hotspot because they can be applied in tandem cells to break the Shockley–Queisser radiative limit of the single junction PSCs. However, the introduction of tin, on the one hand, makes the crystal quality of perovskite thin film worse, leading to the increase of film defects; on the other hand, the easy oxidation of divalent tin also leads to the increase of defect states, which seriously affects the photoelectric conversion efficiency of tin–lead cell devices. Good crystallization and low defect density of perovskite layer are very important to ensure good light absorption and photogenerated carrier generation and transport. Here, we adjust the crystallization of tin–lead perovskite films by a Lewis base—urea (CO(NH2)2), which significantly increases the grain size and improves the film morphology. At the same time, because of the Lewis base property of urea, the uncoordinated Pb2+ and Sn2+ defects of Lewis acids in the tin–lead films are effectively passivated, and the occurrence of non-radiative recombination in the films is reduced. Under the dual effects of improving crystallization and passivating defects, the photoelectric performance of tin–lead perovskite solar cell devices is significantly improved to 18.1% compared with the original device of 15.4%.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Junqiao Jiang,Min Xiao,Sheng Huang,Dongmei Han,Shuanjin Wang,Yuezhong Meng
Phosphoric acid (PA)-dependent proton conductivity and polymer-offered mechanical properties are contradictory in high-temperature proton exchange membranes (HT-PEMs). Microphase separation strategy contributes to achieve a tradeoff between proton conductivity and mechanical properties. Herein, a kind of phosphonic acid-imidazolium containing polymer (PICP) ionomeric membranes, in which acidophilic (imidazolium) and acidophobic groups (-PO 3 H 2 ) can be induced to form a microphase separation structure by PA, are firstly prepared. The acidophilic phase with adsorbed PA plays the role of proton conduction and the acidophobic phase can not only provides -PO 3 H 2 group synergistically conduct protons but also largely maintains the intrinsic mechanical properties. As a result, the PICP ionomeric membranes with microphase separation structure possess high proton conductivity (48 mS cm −1 , 160 °C) and satisfying mechanical strength (16.5 MPa) simultaneously at a moderate PA doping level (130 wt%). The fuel cell based on such HT-PEMs demonstrates a peak power density of 493 mW cm −2 and high voltage stability. This is the first report of phosphonic acid-imidazolium containing ionomeric membranes with satisfactory fuel cell performance and durability, representing a meaningful step towards practical HT-PEM fuel cells.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yue Zhao,Shujie Jiao,Shuo Liu,Yimin Jin,Song Yang,Xianghu Wang,Tong Liu,Hongyan Jin,Dongbo Wang,Shiyong Gao,Jinzhong Wang
All-inorganic perovskite photodetectors aroused widespread attention due to the splendid photoelectric characteristics and stability. However, the inherent defects in perovskite films hinders the progress of the photodetectors. Here, a Lewis base of thioacetamide additive was used to passivate defects in CsPbBr 3 perovskite films based on Lewis acid-base interactions. The quality of the film has been distinctly enhanced due to the interaction between the S donor in thioacetamide and the uncoordinated Pb 2+ in perovskite, diminishing the defect state density and inhibits the non-radiative recombination. The self-powered champion device based on CsPbBr 3 film contain optimum thioacetamide additive exhibits a lower dark current density of 4.01 nA/cm 2 , a peak responsivity of 0.39 A/W, a rapid rise/decay time of 12.4 μs/56.2 μs, a peak detectivity of 1.08 × 10 13 Jones and a lager linear dynamic range of 99 dB, which are much better than photodetector based on CsPbBr 3 perovskite without TAA additive. Furthermore, it exhibits high-resolution imaging sensing capability at zero bias. This research affords guidance for the performance improvement and application of all-inorganic perovskite photodetectors.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Wanlong Wang,Rong Liu,Chen Dong,Yunmin Xie,Minlin Jiang,Guohua Dong,Hang Zhou
Aluminum-doped zinc oxide (AZO) is a promising substrate for perovskite solar cells (PSCs) because of its low cost, easy accessibility, and good conductivity. However, its relatively low transmittance with low resistance and inevitable reflectance loss makes it unfavorable for high-performance AZO-based PSCs. Herein, a simple and effective strategy that textures the surface of AZO substrate via a diluted HCl etching, is developed to boost PSC performance. The textured AZO substrate exhibits greater haze, higher transmittance, and lower reflectance for permitting more photons to reach and be absorbed within PSCs. In addition, the textured AZO substrate not only exhibits improved surface wettability that can enhance the buried interfacial contact and enable the growth of high-quality perovskite film, but also possesses reduced oxygen vacancies and lower work function (WF) that can suppress the recombination and reduce the energy barrier for electron extraction. As a result, the PSC on textured AZO substrate shows improved fill factor (FF, 70 %) and enhanced short-circuit current density (J sc , 23.7 mA/cm 2 ) compared with the reference cells (63 % and 21.1 mA/cm 2 ), yielding a much-increased power conversion efficiency (PCE) from 13.9 % to 17.6 %. The present work opens the door for the employment of AZO substrate in future commercialization of PSCs.
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