Article
Engineering, Environmental
Yu Zhang, Guishun Li, Guangning Hou, Jianqiu Lin, Maosheng Chen, Shaohua Liu, Hechun Lin, Junfeng Fang, Chengbin Jing, Junhao Chu
Summary: Inorganic cesium lead halide perovskite nanocrystals have promising applications in optoelectronic devices. However, their poor stability and low photoluminescence quantum yield have hindered practical use. In this study, a ligand engineering strategy using a multidentate ligand BDGA was employed to enhance the stability and quantum yield of the perovskite nanocrystals. The resulting nanocrystals demonstrated high quantum yield, superior colloidal stability, and enhanced resistance to thermal treatment and UV irradiation. Moreover, white light-emitting diodes fabricated using these nanocrystals exhibited high luminous efficiency and wide color gamut.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yangning Zhang, Omar F. Aly, Anastacia De Gorostiza, Thana Shuga Aldeen, Allison J. Segapeli, Brian A. Korgel
Summary: Cesium methylammonium lead iodide (Cs(x)MA(1-x)PbI(3)) nanocrystals with a wide range of Cs-MA compositions were synthesized through post-synthetic cation exchange. The alloyed nanocrystals retained their perovskite phase and composition-tunable photoluminescence. Fast cation exchange was achieved by adding excess methylammonium oleate to the reaction mixture. The transformation and degradation kinetics of the nanocrystal films were slower than those of the parent nanocrystals.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Stefan Martin, Nina A. Henke, Carola Lampe, Markus Doeblinger, Kilian Frank, Patrick Ganswindt, Bert Nickel, Alexander S. Urban
Summary: Anisotropic blue-green emitting CsPbBr3 nanocrystals with precise tunability of emission wavelength in the range of 475-500 nm have been synthesized using a spontaneous crystallization method. The growth process can be controlled by injecting an enhancement solution, allowing for excellent control over nanocrystal size. This study is of great importance for enhancing the functionality of these nanocrystals.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Di Lu, Akihiro Urayama, Norio Saito
Summary: Metal halide perovskite nanocrystals (NCs) have excellent photophysical properties but poor stability and dispersibility in polar solvents. Researchers encapsulated CsPbBr3 NCs into an AOT-based emulsion to improve their dispersion and stability. The modified CsPbBr3 NCs exhibited good dispersibility in polar solvents, offering a facile surface modification approach for perovskite NCs in polar solvents or water environments.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
C. Meric Guvenc, Askin Kocabas, Sinan Balci
Summary: Researchers have successfully synthesized CsPbX3 (X = Br, Cl) nanocubes using a polar solvent-free room temperature method. By adding a mixture of oleylamine, oleic acid, and guanidinium, the formation of low dimensional structures was inhibited, resulting in the formation of perovskite nanocubes. The nucleation and growth kinetics of GA-assisted CsPbBr3 nanocubes were also observed through in situ absorption and photoluminescence measurements.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Qi Pan, Jingjing Hu, Jie Fu, Yi Lin, Chen Zou, Dawei Di, Yunjun Wang, Qiao Zhang, Muhan Cao
Summary: By introducing organic semi-conducting molecules onto CsPbBr3 nanocrystals, they exhibit a high photoluminescent quantum yield (PLQY) of 82% and extremely high stability in harsh conditions. This stability is attributed to the strong interaction and moderate photocarrier transfer between the quasi type II heterostructure formed by the molecule and CsPbBr3. This advancement opens up promising prospects in perovskite-based display technologies.
Article
Chemistry, Multidisciplinary
Victoria Lapointe, Christian J. Imperiale, Sollavi Chengadu, Cristina M. Pomilio, Meera Ganesh, Stephane Kena-Cohen, Marek B. Majewski
Summary: This article reports two hybrid structures of photonic crystal-perovskite nanocrystals and microbeads, which have photoluminescence matching with the parent nanocrystals and increased photoluminescence quantum yields. Time-resolved photoluminescence spectroscopy measures the radiative enhancement provided by the photonic environment of the microbeads. The reported hybrids also exhibit significantly improved resistance to degradation in water after 30 days of immersion.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Jin Young Kim, Woongsik Jang, Jihyun Lim, Dong Hwan Wang
Summary: The synthesis of all-inorganic perovskite quantum dots using a one-pot method without a thermal environment is beneficial for enhancing the crystal structure of the materials. This study presents a novel approach to synthesize CsPbClBr2 blue-emitting quantum dots with excellent optical properties and high quantum yield.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Egle Ezerskyte, Martynas Malikenas, Simas Sakirzanovas, Arturas Katelnikovas, Vaidas Klimkevicius
Summary: In this study, a simple method of preparing all-inorganic lead perovskite quantum dots (QDs) using a novel ultrasound-induced hot-injection method was presented, reducing the synthesis time from hours to 15-20 minutes. Post-synthesis treatment of perovskite QDs with zinc halogenide complexes increased their emission intensity and quantum efficiency by removing or reducing surface electron traps. The ability to instantly adjust the emission color of perovskite QDs by varying the amount of added zinc halogenide complex was demonstrated, covering the full visible spectrum. Zinc halogenide modified perovskite QDs exhibited 10-15% higher quantum efficiencies than individually synthesized QDs.
Article
Materials Science, Multidisciplinary
Maogang Gong, Bikash Timalsina, Ridwan Sakidja, Justin T. Douglas, Judy Z. Wu
Summary: The instability of colloidal iodine-based inorganic perovskite CsPbX3 (X = Cl, Br, I) nanocrystals (IPNCs) has been a major issue in research and application, which can be significantly improved by a ligand-anchoring process. This method reduces exposure of the IPNC surface to harsh colloidal environment by suppressing dynamic ligand exchange, leading to enhanced stability of the IPNCs.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Razi Ahmad, Lukas Zdrazil, Sergii Kalytchuk, Alberto Naldoni, Andrey L. Rogach, Patrik Schmuki, Radek Zboril, Stepan Kment
Summary: The doping and compositional tuning of Cs(2)AInCl(6) (A = Ag, Na) double perovskite nanocrystals is a promising strategy for developing light-emitting sources for solution-processed optoelectronic devices. A novel synthesis and purification method mediated by trioctylphosphine has been reported for antimony-alloyed Cs2NaInCl6 PNCs, resulting in excellent stability and optical features. This approach based on dual cationic ligand passivation of double PNCs opens up opportunities for achieving higher stability and superior optical properties in other systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yu Zhang, Guishun Li, Changkun She, Shaohua Liu, Fangyu Yue, Chengbin Jing, Ya Cheng, Junhao Chu
Summary: A stable CsPbBr3 nanocrystals were successfully synthesized by introducing a double-terminal ligand to replace the conventional one, showing high photoluminescence quantum yield and improved stability, which has great potential for future applications.
Article
Chemistry, Inorganic & Nuclear
Sukanya Ghosh, Prasenjit Kar
Summary: Lead halide perovskites with high fluorescent and tunable morphology are at the forefront of materials chemistry. The introduction of nontoxic aromatic amino acids as capping ligands successfully synthesized perovskite nanocrystals with high fluorescence intensity. Various characterization techniques were employed to investigate the properties of the nanocrystals in both solid and solution phases.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Canyun Zhang, Chenfei Wang, Jin Chen, Fengchao Wang, Jinfang Kong, Lan Li, Hengxing Dong, Yu Sun, Xiaogai Peng, Jiayue Xu
Summary: A solid-state CsPbBr3-based perovskite nanocrystal film with high photoluminescence quantum yield and enhanced stability was successfully synthesized using a convenient centrifugal casting method combined with silica encapsulation and Na-doping techniques. The CsPbBr3@Na@SiO2 PNC film showed significantly improved PLQY and stability, offering great potential for applications in light-emitting and display fields.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Zhaohui Shen, Chenghao Bi, Yao Lu, Dandan Song, Bo Qiao, Suling Zhao, Jianjun Tian, Zheng Xu
Summary: Stable cross-shaped CsPbI3 nanoplates with red emission were successfully synthesized by the assistance of YCl3. The anisotropic growth of the CsPbI3 nanocrystal and the dissolution of four corners lead to the formation of cross-shaped nanoplates. The incorporation of Y3+ dopant widens the bandgap and enhances the stability of the nanoplates. These adjustable wavelength and highly stable nanoplates show great potential in high-definition displays.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
He Liu, Michael Worku, Animesh Mondal, Tunde Blessed Shonde, Maya Chaaban, Azza Ben-Akacha, Sujin Lee, Fabiola Gonzalez, Oluwadara Olasupo, Xinsong Lin, J. S. Raaj Vellore Winfred, Yan Xin, Eric Lochner, Biwu Ma
Summary: Metal halide perovskite nanocrystals have promising applications in various fields, but obtaining efficient and stable blue-emitting perovskite nanocrystals has been challenging. A study found that treatment with organic sulfate can enhance the photoluminescence quantum efficiency and stability of blue-emitting perovskite nanocrystals.
ADVANCED ENERGY MATERIALS
(2023)
Article
Environmental Sciences
Lin Qi, Runwei Li, Yudi Wu, Xinsong Lin, Gang Chen
Summary: This study investigated the impact of perfluorinated carbon chain length on the transport behavior of perfluorocarboxylic acids (PFCAs) and examined their transport behavior under different solution chemistry conditions. The results showed that the chain length had limited impact on the transport behaviors of certain PFCAs, while others were significantly affected by pH and ionic strengths. Additionally, the presence of divalent cation Ca2+ inhibited the transport of all four PFCAs. This study contributes to predicting migration behavior and assessing potential risks of PFCAs in the subsurface system.
Article
Chemistry, Physical
Zhenqi Hua, Azza Ben-Akacha, Qingquan He, Tianhan Liu, Gillian Boyce, Margaret van Deventer, Xinsong Lin, Hanwei Gao, Biwu Ma, Peng Xiong
Summary: Metal halide perovskites have many physical properties suitable for optoelectronic applications, but their potential has been limited by environmental and electronic instabilities. Low-dimensional perovskites and perovskite-related materials with unique molecular structures have shown promise in enhancing chemical stability. In this study, we report robust and reproducible four-terminal electrical measurements in a one-dimensional organic metal halide hybrid, (R)-alpha-methylbenzylammonium lead triiodide, due to its chemical stability. The results reveal a distinct ion migration dynamic that underlies the unique electrical characteristics. Our findings provide a physical basis for understanding and modeling hysteresis in metal halide-based electronic devices, as well as insights into ion migration dynamics in metal halide perovskites and hybrids in general.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
He Liu, Tunde Blessed Shonde, Fabiola Gonzalez, Oluwadara Joshua Olasupo, Sujin Lee, Derek Luong, Xinsong Lin, J. S. Raaj Vellore Winfred, Eric Lochner, Iqra Fatima, Kenneth Hanson, Biwu Ma
Summary: Zero-dimensional (0D) organic metal halide hybrids (OMHHs) are a new class of light emitting materials with exceptional color tunability. However, their application as emitters for electrically driven light emitting diodes (LEDs) is challenging due to the low conductivity of wide bandgap organic cations. In this study, a new OMHH, triphenyl(9-phenyl-9H-carbazol-3-yl) phosphonium antimony bromide (TPPcarzSbBr(4)), is developed as an efficient emitter for LEDs. Red LEDs fabricated with TPPcarzSbBr(4) thin films as the light emitting layer exhibit the highest reported external quantum efficiency (EQE), peak luminance, and current efficiency among 0D OMHH-based electroluminescence devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Sumesh B. Krishnan, Ronald J. Clark, Xinsong Lin, Olga Dmitrenko, Edwin F. Hilinski, Leah R. Kuhn, Igor V. Alabugin, Jack Saltiel
Summary: This article discusses the differences in photochemical and photo-physical behavior between trans-alpha-methylstilbene and trans-stilbene, and presents their X-ray structures. The study found that methyl substitution leads to molecular nonplanarity and structural changes, which affect the lifetime of the trans excited states and the fluorescence quantum yield. Additionally, these findings are relevant to chirality issues in biological molecules.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Review
Chemistry, Multidisciplinary
Yangbin Lu, Kang Qu, Tao Zhang, Qingquan He, Jun Pan
Summary: In this article, we review the synthetic strategies and mechanisms of one-dimensional halide perovskite nanowires in recent years, such as hot injection, vapor phase growth, self-assembly, and solvothermal synthesis. Furthermore, we summarize their applications in optoelectronics, including lasers, photodetectors, and solar cells. Finally, we propose possible perspectives for the development of halide perovskite nanowires.
Article
Chemistry, Multidisciplinary
Tunde Blessed Shonde, Maya Chaaban, He Liu, Oluwadara Joshua Olasupo, Azza Ben-Akacha, Fabiola G. Gonzalez, Kerri Julevich, Xinsong Lin, J. S. Raaj Vellore Winfred, Luis M. Stand, Mariya Zhuravleva, Biwu Ma
Summary: A new type of organic-inorganic hybrid scintillator is developed, which can be prepared via low-temperature processes and contains earth abundant elements. By co-crystallization of an AIE organic halide and a metal halide, the scintillator shows dramatically enhanced X-ray scintillation and higher light yield compared to traditional organic scintillators, while maintaining comparable X-ray absorption to inorganic scintillators. This material design provides a new pathway to address the limitations of both organic and inorganic scintillators.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ping Wang, Sandugash Yergeshbayeva, Xinsong Lin, Shubham Bisht, Miguel Gakiya-Teruya, Michael Shatruk
Summary: This research reports a series of cobalt complexes with tert-butyl-semiquinonato ligands and pyridine ligands functionalized with sulfur-containing substituents. The crystal structures of these complexes show layered packings with cohesive S-containing substituents and interlayer space filled with disordered solvent molecules. Introduction of thienyl substituents in the para or meta positions of the pyridine ring leads to the formation of molecular chains or two-dimensional intermolecular pi-pi interactions within the layers. Magnetic measurements reveal a valence-tautomeric spin-crossover behavior in some complexes. Terminal groups on the para-thienyl substituent can lower the spin-crossover temperature and lead to a two-step spin-state conversion.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Hongyan Zhang, Xiaoxiong He, Hao Wang, Liangjun Chen, Gaopeng Xu, Nan Zhang, Kang Qu, Qingquan He, Yongwu Peng, Jun Pan
Summary: This research focuses on enhancing the stability of metal halide perovskite quantum dots (QDs) through the use of a carboxyl functional group and a covalent organic framework (COF). By growing MAPbBr(3) QDs in situ into a mesoporous carboxyl-functionalized COF, the stability of perovskite QDs is significantly improved. The resulting composites exhibit enhanced water stability and maintain characteristic fluorescence for over 15 days.
Article
Multidisciplinary Sciences
Di Wang, Chenkun Zhou, Alexander S. Filatov, Wooje Cho, Francisco Lagunas, Mingzhan Wang, Suriyanarayanan Vaikuntanathan, Chong Liu, Robert F. Klie, Dmitri V. Talapin
Summary: Two-dimensional transition-metal carbides and nitrides (MXenes) are extensively studied materials with diverse applications in energy storage. We demonstrate a direct synthesis route for scalable and atom-economic production of MXenes, including previously unattainable compounds, by reactions of metals and metal halides with graphite, methane, or nitrogen. The directly synthesized MXenes exhibit excellent energy storage capacity for lithium-ion intercalation, and their growth can be controlled to form unique morphologies such as carpets and spherulites.
Article
Chemistry, Multidisciplinary
Chenkun Zhou, Di Wang, Francisco Lagunas, Benjamin Atterberry, Ming Lei, Huicheng Hu, Zirui Zhou, Alexander S. Filatov, De-en Jiang, Aaron J. Rossini, Robert F. Klie, Dmitri V. Talapin
Summary: Researchers have successfully synthesized a family of hybrid MXenes (h-MXenes) that incorporate amido- and imido-bonding between organic and inorganic parts. These h-MXenes combine the tailorability of organic molecules with the electronic connectivity and other properties of inorganic 2D materials, and exhibit superior stability against hydrolysis.
Article
Chemistry, Physical
He Liu, Tunde Blessed Shonde, Oluwadara Joshua Olasupo, Md Sazedul Islam, Tarannuma Ferdous Manny, Maxim Woodhouse, Xinsong Lin, J. S. Raaj Vellore Winfred, Keyou Sam Mao, Eric Lochner, Iqra Fatima, Kenneth Hanson, Biwu Ma
Summary: Metal halide perovskite nanocrystals have been widely explored for their unique optoelectronic properties in light-emitting diodes (LEDs). In this study, CsPbBr3 nanoplatelets (NPLs) were surface passivated with organic semiconducting ligands for blue LEDs. The result was the successful preparation of CsPbBr3 NPLs with a size of 300 nm, blue emission at 455 nm, and a photoluminescence quantum efficiency (PLQE) of 82%. Introduction of charge-transporting units improved the conductivity of thin films based on CsPbBr3 NPLs and the band edge alignments for blue LEDs. As a result, blue LEDs based on these CsPbBr3 NPLs exhibited high external quantum efficiencies (EQEs) of up to 4.15%, a maximum luminance of 1511 cd m(-2), and a half-lifetime of 50 min (at 100 cd/cm(2)).
ACS ENERGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Yiliang Lin, Jiuyun Shi, Wei Feng, Jiping Yue, Yanqi Luo, Si Chen, Bin Yang, Yuanwen Jiang, Huicheng Hu, Chenkun Zhou, Fengyuan Shi, Aleksander Prominski, Dmitri V. Talapin, Wei Xiong, Xiang Gao, Bozhi Tian
Summary: Semiconductor-based biointerfaces can be established on the surface of the plasma membrane or within the cytoplasm. In Gram-negative bacteria, the periplasmic space offers additional opportunities for biomineralization, allowing for non-genetic modulation interfaces. The formation of semiconductor nanoclusters containing single- and multiple-metal elements within the periplasm has been observed. These periplasmic semiconductors display defect-dominant fluorescent properties and can increase adenosine triphosphate levels and malate production when coupled with photosensitization.
Article
Chemistry, Multidisciplinary
Sujin Lee, Rijan Karkee, Azza Ben-Akacha, Derek Luong, J. S. Raaj Vellore Winfred, Xinsong Lin, David A. Strubbe, Biwu Ma
Summary: Organic metal halide hybrids with low-dimensional structures have attracted significant attention due to their unique photophysical properties. In this study, we synthesized and characterized a one-dimensional organic metal halide hybrid with metal halide nanoribbons. The material exhibited dual emission with a PLQE of approximately 25%. Photophysical studies and DFT calculations revealed the presence of delocalized free excitons and localized self-trapped excitons, which accounted for the dual emission.
CHEMICAL COMMUNICATIONS
(2023)
