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Direct drop-casting synthesis of all-inorganic lead and lead-free halide perovskite microcrystals for high-performance photodetectors

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Nano Research 2022年第4期15卷 3621-3627页

作者： Zhengxun Lai You Meng Fei Wang Xiuming Bu Wei Wang Pengshan Xie Weijun Wang Chuntai Liu SenPo Yip Johnny C.Ho Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 999077China State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130021China State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloonHong Kong 999077China Key Laboratory of Advanced Materials Processing&Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002China Institute for Materials Chemistry and Engineering Kyushu UniversityFukuoka 816–8580Japan

Due to the exciting photoelectric properties,better stability,and environmental-friendly nature,all-inorganic halide perovskites(AIHPs),especially the lead-free perovskites,have attracted worldwide ***,the film quality of AIHPs fabricated by typical spin-coating and subsequent high-temperature annealing is still not satisfactory,restricting their further ***,we demonstrate a simple low-temperature solution-processed drop-casting method to achieve highly-crystalline cubic CsPbBr_(3)and lead-free layer-structured Cs_(3)Sb_(2)I_(9)microcrystals(MCs).This drop-casting technique not only consumes the less amount of precursor solution but also eliminates the high-temperature annealing as compared with those of spin *** these MCs are configured into photodetectors,they exhibit superior device performance,which is in distinct contrast to the one of spin-coated ***,the responsivity of CsPbBr_(3)MCs is found to be as large as 8,990 mA/W,being 13 times larger than the spin-coated films and even better than many state-of-the-art solution-processed AIHPs *** device performance enhancement is attributed to the better film quality and phase purity obtained by the drop-casting *** these results can evidently fill the“technology gap”for further enhancing the material quality of solution-processed AIHPs and breaking down the barriers that hinder the development of AIHPs based optoelectronic devices.

关键词： halide perovskite drop-casting photodetector CsPbBr_(3) Cs_(3)Sb_(2)I_(9)

Photophysics of halide perovskite nanocrystal quantum dots

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Nano Research 2024年第12期17卷 10536-10542页

作者： Yoshihiko Kanemitsu Institute for Chemical Research Kyoto UniversityUjiKyoto 611-0011Japan

Here I provide a summary of my group’s research on the photophysics of nanocrystal quantum dots and briefly discuss multipeak luminescence structures related to excitons,trions,and biexcitons in halide perovskite nan... 详细信息

关键词： quantum dot nanocrystals halide perovskite exciton trions biexciton

Close-loop recyclable and flexible halide perovskite@wool keratin sensor with piezoelectric property

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Journal of Energy Chemistry 2023年第9期84卷 428-435页

作者： Yingying Zhou Dangge Gao Bin Lyu Chi Zheng Litao Tang Shihao Guo Jianzhong Ma College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi'an 710021ShaanxiChina Xi'an Polytechnic University Xi'an 710048ShaanxiChina National Demonstration Center for Experimental Light Chemistry Engineering Education(Shaanxi University of Science&Technology) Xi'an 710021ShaanxiChina Xi'an Key Laboratory of Green Chemicals and Functional Materials Xi'an 710021ShaanxiChina

halide perovskites with excellent piezoelectric properties,but their poor stability hinders their largescale ***,a sandwich-structured halide perovskite flexible sensor with good stability was developed according to a three-step procedure as follows:(ⅰ) in-situ growth of wool keratinCsPbBr_(3)(WK-CsPbBr_(3)) using wool keratin in interfacial passivation and coating,(ⅱ) electrospinning of a wool keratin-CsPbBr_(3)/polyacrylonitrile(WCP) nanofiber film,and(ⅲ) coating of the WCP nanofiber with polydimethylsiloxane(PDMS) to obtain a sensor(WCPP).The sensor could generate a piezoelectric voltage of 7.8 V at a pressure of 6 kPa in the stages of pressing and releasing,and the output characteristics did not decline even after 10,000 *** to the 4-month stability of the perovskite sensor,WCPP sensor exhibited the output performance even after 16 months,which indicated that wool keratin as a multidentate improved the stability of the halide ***,the sensor displayed a self-cleaning property and could also light up 14 commercial *** close-loop recycling of the lead halide perovskite was achieved by dissolving the WCP nanofiber film in DMF and then ***,the method proposed is a step forward for achieving the commercialization of WK-CsPbBr_(3) and providing new avenues for further utilization of wool waste.

关键词： Piezoelectric halide perovskite Wool keratin Sensor Human monitoring

Solution-processed all-inorganic lead halide perovskite/layered double hydroxides superlattices

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Science China Chemistry 2024年第9期67卷 2904-2910页

作者： Deyu Li Mingming Zhang Lulu Wei Shubing Tian Mingze Sun Kang Liu Jixiang Xu Lei Wang Jun Xing Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China College of Sino-German Science and Technology Qingdao University of Science&TechnologyQingdao 266042China

Quantum wells and superlattices are key building blocks in the semiconductor industry,normally fabricated using epitaxial growth techniques,such as vapor phase epitaxy,metalorganic chemical vapor deposition and molecular beam ***,these complicated preparation processes,as well as their high cost,limit their extensive *** is essential to develop a simple solution process for building ***,we demonstrate an ion exchange strategy for synthesizing an allinorganic superlattice cesium lead bromide/layered double hydroxides(CsPbBr_3/LDH)in *** room temperature,the perovskite ions diffuse into the interlayer of LDH and assemble into layered perovskite with various *** with traditional organic-inorganic hybrid perovskite superlattice,the all-inorganic perovskite superlattice CsPbBr_(3)/LDH has weak quantum confinement,which exhibits narrow emission line-widths of 20 nm,high quantum yields of 55%,and radiative lifetimes of several *** findings offer a new route to synthesize novel perovskite superlattices and enrich the perovskite supercrystal platform for electronics,photonics and optoelectronics devices.

关键词： halide perovskite superlattice layered double hydroxides 2D

Advances in halide perovskite semiconductors for energy-integrated and energy-resolved X-ray detection

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第10期25卷 824-840页

作者： Yibin LAI Yang(Michael)YANG State Key Laboratory of Modern Optical Instrumentation Institute for Advanced PhotonicsCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

X-ray andγ-ray detectors are widely used in medical,military,security,material analysis,and industrial *** recent years,perovskite materials have become promising materials for radiation detection owing to their strong stopping power,considerable carrier transportation ability,and simple synthesis *** studies have demonstrated both direct and indirect radiation detectors using perovskite *** this review,we aim to elucidate the mechanism by which X-rays andγ-rays interact with matter,explain the principles of the energy integrating mode and photon counting mode for direct detection,and discuss the key factors determining device ***,we summarize recent advances in perovskite-based radiation detectors for both ***,we identify challenges that need to be overcome to enable perovskite materials to be successfully commercialized.

关键词： halide perovskite X-ray Direct detection Photo counting

Recent advances in halide perovskite memristors:From materials to applications

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Frontiers of physics 2024年第2期19卷 73-104页

作者： Sixian Liu Jianmin Zeng Qilai Chen Gang Liu Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Aerospace Science&Industry Shenzhen(Group)Co.Ltd. Shenzhen 518000China

With the emergence of the Internet of Things(IoT)and the rapid growth of big data generated by edge devices,there has been a growing need for electronic devices that are capable of processing and transmitting data at low power and high *** Complementary Metal-Oxide-Semiconductor(CMOS)devices are nonvolatile and often limited by their ability for certain IoT applications due to their unnecessary power consumption for data movement in von Neuman architecture-based *** has led to a surge in research and development efforts aimed at creating innovative electronic components and systems that can overcome these shortcomings and meet the evolving needs of the information era,which share features such as improved energy efficiency,higher processing speeds,and increased *** are a novel type of electronic device that has the potential to break down the barrier between storage and *** storing data and processing information within the same device,memristors can minimize the need for data movement,which allows for faster processing speeds and reduced energy *** further improve the energy efficiency and reliability of memristors,there has been a growing trend toward diversifying the selection of dielectric materials used in *** perovskites(HPs)have unique electrical and optical properties,including ion migration,charge trapping effect caused by intrinsic defects,excellent optical absorption efficiency,and high charge mobility,which makes them highly promising in applications of *** this paper,we provide a comprehensive overview of the recent development in resistive switching behaviors of HPs and the underlying ***,we summarize the diverse range of HPs,their respective performance metrics,as well as their applications in various ***,we critically evaluate the current bottlenecks and possible opportunities in the future research of HP memristors.

关键词： halide perovskite memristor mechanism neuromorphic computing non-volatile memory

Solution and Solid-Phase Growth of Bulk halide perovskite Single Crystals

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Chinese Journal of Chemistry 2021年第5期39卷 1353-1363页

作者： Chao Zhang Xiaolin Liu Jing Chen Jia Lin Department of Physics Shanghai Key Laboratory of Materials Protection ond Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China

perovskite is a magic material with a structure similar to calcium titanate(CaTi03).Among perovskite materials,halide perovskite has gained considerable attention owing to its superior semiconducting properties such as direct band gap and relatively small effective mass of electrons and *** recent years,the power conversion efficiency of halide perovskite solar cells has been continuously *** growth of bulk halide perovskite single crystals(PSCs)has become crucial to the investigation of their intrinsic *** the entire preparation process,the growth method generally plays a significant role,which determines the quality and size of the target *** this review,we summarized the existing mainstream synthetic methods for growing bulk PSCs including solution and solid-phase *** discussed the characteristics of these methods and the influence of the growth parameters on the quality and size of the resulting ***,we briefly introduce the applications of PSCs as semiconductors in photodetectors and gas *** the growth behaviors of PSCs is insightful for future research on their synthesis and applications.

关键词： halide perovskite Bulk single crystal Crystal growth Synthetic methods Semiconductors

Organometal halide perovskite quantum dots:synthesis,optical properties,and display applications

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Chinese Chemical Letters 2016年第8期27卷 1124-1130,1464页

作者： Gao-Ling Yang Hai-Zheng Zhong Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Materials Science & Engineering

In recent two years,organometal halide perovskites quantum dots are emerging as a new member of the nanocrystals *** the chemical point of view,these perovskites quantum dots can be synthesized either by classical hot-injection technique for inorganic semiconductor quantum dots or the reprecipitation synthesis at room temperature for organic *** a physical point of view,the observed large exciton binding energy,well self-passivated surface,as well as the enhanced nonlinear properties have been of great interest for fundamental *** the application point of view,these perovskites quantum dots exhibit high photoluminescence quantum yields,wide wavelength tunability and ultra-narrow band emissions,the combination of these superior optical properties and low cost fabrication makes them to be suitable candidates for display *** this short review,we introduce the synthesis,optical properties,the prototype light-emitting devices,and the current important research tasks of halide perovsktie quantum dots,with an emphasis on CH_3NH_3PbX_3（X= CI,Br,I） quantum dots that developed in our group.

关键词： halide perovskite Quantum dots Photoluminescence Electroluminescence Display

Formadinium Cation Doping Stabilized Ultra-deep-blue Lead halide perovskite Nanocrystal Light-emitting Diodes

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Chemical Research in Chinese Universities 2024年第3期40卷 556-560页

作者： Pui Kei KO Jonathan E.HALPERT Department of Chemistry The Hong Kong University of Science and TechnologyKowloonHong Kong 999077P.R.China

The halide migration effect in mixed-halide lead-based perovskite is a serious problem hindering the development of its display *** this study,we have successfully addressed this issue by reporting formadinium(FA)doped mixed-halide perovskite nanocrystals(NCs)with ultra-deep-blue emission of 450 nm,narrow bandwidth of 16 nm,and a high photoluminescence quantum yield(PLQY)of 66%.The perovskite nanocrystal light-emitting diodes(NC-LEDs)using this nanocrystal as an active layer achieved a maximum external quantum efficiency(EQE)of 0.32%,30-fold improved compared to that of pristine and stable electroluminescence(EL)spectra at 450 nm under a 4.9–8.0 V *** findings demonstrate the potential of our approach in developing stable and efficient deep blue perovskite NC-LEDs.

关键词： halide perovskite Light-emitting diode Deep-blue