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From kesterite 2D nanosheets to wurtzite 1D nanorods:controllable synthesis of Cu-Zn-Sn-S and their application in electrocatalytic hydrogen evolution
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作者 Yu Li Shuaibing Wang +4 位作者 Jie Chen Ouyang Lin Zhe Yin Chunhe Yang aiwei tang 《Journal of Semiconductors》 EI CAS CSCD 2023年第12期104-110,共7页
As typical quarternary copper-based chalcogenides,Cu–Zn–Sn–S nanocrystals(CZTS NCs)have emerged as a newfashioned electrocatalyst in hydrogen evolution reactions(HERs).Oleylamine(OM),a reducing surfactant and solve... As typical quarternary copper-based chalcogenides,Cu–Zn–Sn–S nanocrystals(CZTS NCs)have emerged as a newfashioned electrocatalyst in hydrogen evolution reactions(HERs).Oleylamine(OM),a reducing surfactant and solvent,plays a significant role in the assisting synthesis of CZTS NCs due to the ligand effect.Herein,we adopted a facile one-pot colloidal method for achieving the structure evolution of CZTS NCs from 2D nanosheets to 1D nanorods assisted through the continuous addition of OM.During the process,the mechanism of OM-induced morphology evolution was further discussed.When merely adding pure 1-dodecanethiol(DDT)as the solvent,the CZTS nanosheets were obtained.As OM was gradually added to the reaction,the CZTS NCs began to grow along the sides of the nanosheets and gradually shrink at the top,followed by the formation of stable nanorods.In acidic electrolytic conditions,the CZTS NCs with 1.0 OM addition display the optimal HER activity with a low overpotential of 561 m V at 10 m A/cm^(2) and a small Tafel slope of 157.6 m V/dec compared with other CZTS samples.The enhancement of HER activity could be attributed to the contribution of the synergistic effect of the diverse crystal facets to the reaction. 展开更多
关键词 2D nanosheets 1D nanorods structure evolution Cu-Zn-Sn-S electrocatalytic hydrogen evolution
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Tunable crystal structure of Cu-Zn-Sn-S nanocrystals for improving photocatalytic hydrogen evolution enabled by copper element regulation 被引量:4
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作者 Zhe Yin Min Hu +3 位作者 Jun Liu Hao Fu Zhijie Wang aiwei tang 《Journal of Semiconductors》 EI CAS CSCD 2022年第3期68-73,共6页
Hydrogen energy is a powerful and efficient energy resource,which can be produced by photocatalytic water split-ting.Among the photocatalysis,multinary copper-based chalcogenide semiconductor nanocrystals exhibit grea... Hydrogen energy is a powerful and efficient energy resource,which can be produced by photocatalytic water split-ting.Among the photocatalysis,multinary copper-based chalcogenide semiconductor nanocrystals exhibit great potential due to their tunable crystal structures,adjustable optical band gap,eco-friendly,and abundant resources.In this paper,Cu-Zn-Sn-S(CZTS)nanocrystals with different Cu content have been synthesized by using the one-pot method.By regulating the surface ligands,the reaction temperature,and the Cu content,kesterite and hexagonal wurtzite CZTS nanocrystals were obtained.The critical factors for the controllable transition between two phases were discussed.Subsequently,a series of quatern-ary CZTS nanocrystals with different Cu content were used for photocatalytic hydrogen evolution.And their band gap,energy level structure,and charge transfer ability were compared comprehensively.As a result,the pure hexagonal wurtzite CZTS nano-crystals have exhibited an improved photocatalytic hydrogen evolution activity. 展开更多
关键词 photocatalytic hydrogen evolution WURTZITE Cu-Zn-Sn-S nanocrystals
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Rational design of multinary copper chalcogenide nanocrystals for photocatalytic hydrogen evolution 被引量:3
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作者 Hao Fu aiwei tang 《Journal of Semiconductors》 EI CAS CSCD 2020年第9期78-85,共8页
Photocatalytic hydrogen evolution is one of the most promising ways to solve environmental problems and produce a sustainable energy source.To date,different types of photocatalysts have been developed and widely used... Photocatalytic hydrogen evolution is one of the most promising ways to solve environmental problems and produce a sustainable energy source.To date,different types of photocatalysts have been developed and widely used in photocatalytic hydrogen evolution.Recently,multinary copper chalcogenides have attracted much attention and exhibited potential applications in photocatalytic hydrogen evolution due to their composition-tunable band gaps,diverse structures and environmental-benign characteristics.In this review,some progress on the synthesis and photocatalytic hydrogen evolution of multinary copper chalcogenide nanocrystals(NCs)was summarized.In particular,considerable attention was paid to the rational design and dimensional or structural regulation of multinary copper chalcogenide NCs.Importantly,the photocatalytic hydrogen evolution of multinary copper chalcogenide NCs were reviewed from the aspects of energy level structures,crystal facets,morphology as well as composition.Finally,the current challenges and future perspectives of copper chalcogenide were proposed. 展开更多
关键词 photocatalytic hydrogen evolution NANOCRYSTALS copper chalcogenides
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Progress on the controllable synthesis of all-inorganic halide perovskite nanocrystals and their optoelectronic applications 被引量:1
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作者 Yi Yuan aiwei tang 《Journal of Semiconductors》 EI CAS CSCD 2020年第1期10-27,共18页
In the past five years,all-inorganic metal halide perovskite(CsPbX3,X=Cl,Br,I)nanocrystals have been intensely studied due to their outstanding optical properties and facile synthesis,which endow them with potential o... In the past five years,all-inorganic metal halide perovskite(CsPbX3,X=Cl,Br,I)nanocrystals have been intensely studied due to their outstanding optical properties and facile synthesis,which endow them with potential optoelectronic applications.In order to optimize their physical and chemical properties,different strategies have been developed to realize the controllable synthesis of CsPbX3 nanocrystals.In this short review,we firstly present a comprehensive and detailed summary of existed synthesis strategies of CsPbX3 nanocrystals and their analogues.Then,we introduce the regulations of several reaction parameters and their effects on the morphologies of CsPbX3 nanocrystals.At the same time,we provide stability improvement methods and representative applications.Finally,we propose the current challenges and future perspectives of the promising materials. 展开更多
关键词 metal halide perovskite NANOCRYSTALS synthesis optical properties
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多元铜基硫族半导体纳米晶的发光性能及其在电致发光器件中的应用进展 被引量:2
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作者 张京 王立瑾 +2 位作者 陈斐 唐爱伟 滕枫 《科学通报》 EI CAS CSCD 北大核心 2021年第17期2162-2178,共17页
半导体纳米晶(又称为半导体量子点)由于其色纯度高和尺寸依赖的发光性能等优势,在照明和显示方面受到了科学界和产业界的广泛关注.目前,基于半导体量子点的电致发光器件所使用的发光材料以镉基硫族化合物量子点为主,然而镉元素对环境和... 半导体纳米晶(又称为半导体量子点)由于其色纯度高和尺寸依赖的发光性能等优势,在照明和显示方面受到了科学界和产业界的广泛关注.目前,基于半导体量子点的电致发光器件所使用的发光材料以镉基硫族化合物量子点为主,然而镉元素对环境和人体都有一定的危害.因此,开发一种环境友好且光电性能良好的无镉半导体纳米晶是非常必要的.近年来,多元铜基硫族半导体纳米晶由于其毒性低、组分可调的发光特性及其在光电子器件领域的潜在应用受到了广泛关注.本文详细综述了多元铜基硫族半导体纳米晶的组分、表面配体、晶体结构和纳米结构等因素对其发光特性的影响,着重阐述了多元铜基硫族半导体纳米晶在电致发光器件中的研究进展,最后对多元铜基硫族半导体纳米晶的发展进行了展望. 展开更多
关键词 半导体纳米晶 多元铜基硫族化合物 发光性能 电致发光器件
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Facile synthesis of ternary AgInS_(2)nanowires and their self-assembly of fingerprint-like nanostructures 被引量:1
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作者 Jing Zhang Bin Zeng +1 位作者 Haihang Ye aiwei tang 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第4期1507-1510,共4页
Nanowires(NWs)and self-assemble nanostructures made of chalcogenide semiconductor nanocrystals(NCs)are of great interests to the fundamental studies and practical applications.In this study,we reported a seeded-mediat... Nanowires(NWs)and self-assemble nanostructures made of chalcogenide semiconductor nanocrystals(NCs)are of great interests to the fundamental studies and practical applications.In this study,we reported a seeded-mediated growth of AgInS_(2)NWs and their intriguing self-assembly nanostructures with fingerprint-like shape.The key to the formation and self-assembly of AgInS_(2)NWs was the presence of In-S species that was a type of molecular metal chalcogenide complexes,serving as specific inorganic ligands for the growth of NWs and cross-linker molecules for the self-assembly of fingerprint-like nanostructures.Systematic studies were carried out to investigate the reaction factors,including the thermodynamics,amount and type of In precursors,and 1-dodecanethiol usage,to the success of the desired products. 展开更多
关键词 AgInS_(2)nanowires SELF-ASSEMBLY Fingerprint-like structure Seeded-mediatedgrowth Semiconductor nanocrystals
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Solution-processed electroluminescent whitelight-emitting devices based on AIE molecules and Cu-In-Zn-S nanocrystals
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作者 PEIWEI LV ZHENYANG LIU +5 位作者 JINXING ZHAO ZUPING XIONG LIJIN WANG XU LI ZHAOSHENG QIAN aiwei tang 《Photonics Research》 SCIE EI CAS CSCD 2022年第11期2622-2627,共6页
Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and,thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed l... Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and,thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed lightemitting diodes(excluding a cathode) based on aggregation-induced emission(AIE) molecules of tetraphenylethylene-4Cl(TPE-4Cl) and cadimum-free semiconductor nanocrystals(NCs) for the first time. By mixing Cu-In-Zn-S NCs and TPE-4Cl as an emissive layer, a new type of environmentally friendly white-light-emitting diodes(WLEDs) was prepared through a solution-processed technique. After systematical optimization of the asprepared WLEDs, the corresponding color rendering index can reach up to 87 with a maximum luminance of262 cd/m2. This study may pave a new road to realize AIE-based WLEDs through a solution-processed technique. 展开更多
关键词 technique NANOCRYSTALS AIE
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