Wenqi Zhang  Zhichao Lin  Qingbin Cai  Xiangning Xu  Hongye Dong  Cheng Mu  Jian-Ping Zhang 《ChemSusChem》2022,15(3):e202102002

Fluorine and indium elements in F-doped SnO₂ (FTO) and Sn-doped In₂O₃ (ITO), respectively, significantly contribute toward enhancing the electrical conductivity of these transparent conductive oxides. In this study, fluorine was combined with indium to modify the SnO₂ electron transport layer (ETL) through InF₃. Consequently, the modified perovskite solar cells (PSCs) showe the favorable alignment of energy levels, improved absorption and utilization of light, enhanced interfacial charge extraction, and suppressed interfacial charge recombination. After InF₃ modification, the open circuit voltage (V_oc) and fill factor (FF) of the PSC were significantly improved, and the photoelectric conversion efficiency (PCE) reached 21.39 %, far exceeding that of the control PSC (19.62 %).  相似文献   

    

Dr. Qing Ji  Prof. Xiaoping Chen  Prof. Ya-Jun Cheng  Qingyu Dong  Prof. Yanbin Shen  Prof. Zhaohui Yang  Dr. Binjie Hu  Prof. Yonggao Xia 《ChemSusChem》2022,15(8):e202200063

As a promising alternative as lithium-ion anode, niobium dioxide appeals to researchers due to high theoretical capacity and good electron conductivity. However, rarely work about NbO₂ based high performance anode is reported. Here, NbO₂ nanoparticles emcoated in continuous carbon matrix is constructed through CO₂/H₂ coupling treatment. CO₂ activation introduces unique carbon emcoating structure, which builds interconnected electron conductive network with low carbon content. Furthermore, crystallographic phase of NbO₂ is enhanced during H₂ treatment, which increases the lithium storage ability. Electrochemical performance of NbO₂ anodes is significantly improved based on the carbon emcoating structure. A high reversible capacity of 391 mAh g⁻¹ is retained after 350 cycles at 0.2 C. Additionally, at a current density of 1 A g⁻¹, the reversible capacity reaches 139 mAh g⁻¹. Compared with conventional NbO₂/C nanohybrids, the lithium diffusion coefficient of carbon-emcoated sample shows improvement of three orders of magnitude. Moreover, the in situ XRD investigation shows a reversible lithium insertion behaviour with a limited volume change.  相似文献   

    

Dr. Xuexue Dong  Dr. Xuyu Wang  Dr. Hua Song  Dr. Yue Zhang  Prof. Aihua Yuan  Dr. Zengjing Guo  Dr. Qian Wang  Prof. Fu Yang 《ChemSusChem》2022,15(13):e202200076

Herein, a one-dimensional hollow nanofiber catalyst composed of tightly packed multiphase metal oxides of Mn₂O₃ and Cu_1.4Mn_1.6O₄ was constructed by electrospinning and tailored thermal treatment procedure. The characterization results comprehensively confirmed the special morphology and composition of various comparative catalysts. This strategy endowed the catalyst with abundant interfacial characteristics of components Mn₂O₃ and Cu_1.4Mn_1.6O₄ nanocrystal. Impressively, the tuning thermal treatment resulted in tailored Cu^I sites and surface oxygen species of the catalyst, thus affording optimized oxygen vacancies for reinforced oxygen adsorption, while the concomitant enhanced lattice oxygen activity in the constructed composite catalyst ensured the higher catalytic oxidation ability. More importantly, the regulated proportion of oxygen vacancy and lattice oxygen in the composite catalyst was obtained in the best catalyst, beneficial to accelerate the reaction cycle. Compared to other counterparts obtained by different temperatures, the CMO-500 sample exhibited superior selective aerobic 5-hydroxymethylfurfural (HMF) oxidation to 2,5-furandicarboxylic acid (FDCA, 96 % yield) in alkali-bearing aqueous solution using O₂ at 120 °C, which resulted from the above-mentioned composition optimization and interfacial engineering reinforced surface oxygen consumption and regeneration cycle. The reaction mechanism was further proposed to uncover the lattice oxygen and oxygen vacancy participating HMF conversion process.  相似文献   

    

Shuyue Dong  Jiaojiao Xia  Hexin Zhu  Xiangning Du  Yang Gu  Prof. Qian Liu  Yonglan Luo  Prof. Qingquan Kong  Dr. Haoran Guo  Prof. Tingshuai Li  Prof. Enrico Traversa 《ChemCatChem》2022,14(17):e202200458

Electrochemical synthesis of ammonia via nitrogen reduction reaction is a rational route to save energy and relieve pollution compared to the traditional Haber-Bosch process. In this report, ZrO₂ nanosphere derived from thermolysis of Zr-based biphenyl-4,4′-dicarboxylic acid MOFs (ZrO₂/C) as a non-noble metal catalyst with large specific surface area and porous structure is proposed to fix nitrogen to ammonia at ambient conditions. Such catalyst achieves Faradaic efficiency of 11.86 % and a NH₃ yield rate of 10.72 μg h⁻¹ mg⁻¹_cat. at −0.6 V vs. the reversible hydrogen electrode in 0.1 M Na₂SO₄. First-principles calculations confirm the alternating reaction at the catalyst surface.  相似文献   

    

Wei Qin  Jie Li  Ming-Chan Wang  Xin-Yu Li  Peng-Quan Li  Dong Zhao  Hai-Qing Chu  Jia Fu  Chun-Xia He  Hui-Jin Li  Lu Xing  Xin Zhou  Ye Zhang  Fang-Yun Sun  Hui-Ling Cao 《Crystal Research and Technology》2023,58(8):2300017

The crystal structure of a target-ligand plays an indispensable role in rational drug design, structural optimization, and understanding the molecular interaction mechanism. For drug targets without crystal structures, the simulated 3D structure will provide an alternative important reference. However, the credibility of the simulated structure and its difference from the real crystal structure deserve deep consideration. The complex crystal structures of the target Hsp90^N and its four small molecular inhibitors has previously been successfully determined. Herein, computer-aided molecular docking technology is applied to predict complex 3D structures, and the comparison between the simulated 3D structures and crystal structures is analyzed. Compared with the complex crystal structures, the simulated 3D structures of the four groups have higher consistency with the main chains, whereas the branch chains, binding modes of inhibitors, and molecular interactions are different in detail. Thus, the simulated 3D complex structure can provide useful information to guide drug design and structural optimization of inhibitors when the crystal structure is missing, but it cannot replace the crystal structure and should be used with caution.  相似文献   

    

Yuxin Li  Zeyu Jiang  Prof. Guohui Dong  Prof. Wingkei Ho 《ChemSusChem》2022,15(12):e202200876

  相似文献   

    

Soyeong Ahn  Young-Hoon Kim  Sungjin Kim  Jinwoo Park  Nannan Li  Jung-Min Heo  Joo Sung Kim  Dong Jin Kim  Byung Hee Hong  Jin Yong Lee  Tae-Woo Lee 《Advanced Optical Materials》2021,9(18):2100646

Electroluminescence efficiency and operating stability of solution-processed perovskite light-emitting diodes (PeLEDs) are limited by luminescence quenching induced by indium or tin released from indium tin oxide (ITO) electrode upon deposition of highly acidic conventional hole injection layer (HIL) (i.e., poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)) and inefficient hole injection into perovskite emitting layer. Here, a synergistic molecular strategy to develop a neutralized gradient HIL, which possesses low acidity and high work function (WF) simultaneously, is proposed. First, it is shown that aniline with relatively low basicity and dipole moment efficiently neutralizes HIL while maintaining its original confirmation and high WF. Both acidity-neutralizing aniline and WF-modifying agent (perfluorinated ionomer) are incorporated into PEDOT:PSS to achieve high pH ≈ 6 and WF > 5.8 eV, which suppresses etching of underlying ITO and luminescence quenching while maintaining efficient hole injection into perovskite emitting layer. With this synergetic molecular engineering, high current efficiency = 52.55 cd A⁻¹ with extended operating lifetime is achieved in PeLEDs that use colloidal formamidinium lead bromide nanoparticle films. This result provides a simple and efficient way to develop efficient and stable PeLEDs in industrial displays and solid-state lighting.  相似文献   

    

Min Seong Kim  Joohye Jung  Hyung Tae Kim  Dong Hyun Choi  Sujin Jung  Hyun Jae Kim 《Advanced Optical Materials》2021,9(21):2100725

A facile method is presented involving a reducing agent, sodium dithionite (Na₂S₂O₄), to control the photoresponse characteristics of oxide semiconductors that detect visible-light. The method exhibits extraordinary potential for fabricating a diverse range of optoelectronic devices. Due to its weak S–S bond, Na₂S₂O₄ generates excessive subgap states and oxygen vacancies in hafnium–indium–gallium–zinc oxide (HIGZO) thin-film during the reduction treatment (RDT). It is achievable to finely tune the photoresponse characteristic by adjusting the molarity of Na₂S₂O₄, implying superior applicability of RDT into various applications. First, HIGZO phototransistors with photoresponsivity of 626.32 A W⁻¹, photosensitivity of 3.32 × 10⁷, and detectivity of 7.18 × 10¹¹ Jones under 10 mW mm⁻² of red light illumination are fabricated using 0.1 m Na₂S₂O₄. Second, 0.5 m Na₂S₂O₄ is chosen for photomemory-based neuromorphic devices with a paired-pulse facilitation index of 142.6% when the input pulse of red light with an intensity of 1 mW mm⁻² is introduced. In addition, major synaptic functions such as short-term memory and long-term memory behaviors, originated from persistent photoconductivity and depending on sequential pulse condition, are successfully emulated. These results indicate that RDT can control the photoresponse of oxide semiconductors to expand the applicability of oxide semiconductors without using a light absorption layer.  相似文献   

    

Ik Jae Park  Dong Hoe Kim  Su Geun Ji  You Jin Ahn  So Jeong Park  Daehan Kim  Byungha Shin  Jin Young Kim 《Advanced Optical Materials》2021,9(20):2100788

Minimizing optical losses of the incident light at the window layers is one of the effective strategies for high photoresponse to achieve highly efficient perovskite/silicon tandem cells. The enhancement of the photoresponse of monolithic tandem cells via rationally controlling their window layers consisting of C₆₀ and indium tin oxide (ITO) is reported. The optical simulation and experimental results are consistent that employing thinner C₆₀ and ITO layers would reduce the optical losses caused by absorption/reflection of the incident, which should lead to the increased photocurrent density. However, it is found that the enhanced optical properties have to be balanced with the changes in the electrical and structural properties. The thickness of layers is optimized to function as charge collection and protection (during sputtering process) layers. As a result, the optimum design of the window layers maximizes the photoresponse without degrading the device performances, leading to a highly efficient two-terminal perovskite/silicon tandem solar cell with a power conversion efficiency of 25.63%.  相似文献   

    

Xingjie Lv  Shuai Dong  Xin Huang  Bo Cao  Shouxin Zeng  Yaojin Wang  Tom Wu  Lang Chen  Junling Wang  Guoliang Yuan  Jun-Ming Liu 《Advanced Optical Materials》2021,9(20):2100837

It is well known that a material may be strained by mechanical, thermal, electric, magnetic, and light stimuli, and this effect has been extensively utilized in industries. However, the observed photostrictive effect usually occurs in the very thin surface layer and the photostriction of most bulk materials has been too small to be applied in a device until now. Here, a giant bulk photostriction is achieved, evidenced by the measured linear strain ε ≈ 0.72–0.43% for MAPbI₃ single crystal plates of 0.05–0.5 mm in thickness under the 532 nm illumination. More importantly, the MAPbI₃ single crystals also exhibit accurate photomechanical actuation functionality and the actuator can precisely adjust the displacement from hundreds of pm to tens of μm or the angle of a hard mirror from ≈10⁻⁶ to 0.2 degree. The present work not only unveils the huge bulk photostriction in lead halide perovskite single crystals but also demonstrates a wireless photomechanical actuator which is much simpler and smaller than conventional piezoelectric actuators.  相似文献