1
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Ban HW, Vafaie M, Levina L, Xia P, Imran M, Liu Y, Najarian AM, Sargent EH. Resurfacing of InAs Colloidal Quantum Dots Equalizes Photodetector Performance across Synthetic Routes. J Am Chem Soc 2024. [PMID: 39197089 DOI: 10.1021/jacs.4c06202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2024]
Abstract
The synthesis of highly monodispersed InAs colloidal quantum dots (CQDs) is needed in InAs CQD-based optoelectronic devices. Because of the complexities of working with arsenic precursors such as tris-trimethylsilyl arsine ((TMSi)3As) and tris-trimethylgermyl arsine ((TMGe)3As), several attempts have been made to identify new candidates for synthesis; yet, to date, only the aforementioned two highly reactive precursors have led to excellent photodetector device performance. We begin the present study by investigating the mechanism, finding that the use of the cosurfactant dioctylamine plays a crucial role in producing monodispersed InAs populations. Through quantitative analysis of ligands on the surface of InAs CQDs, we find that (TMGe)3As leads to In-rich characteristics, and we document the presence of an amorphous In-oleate shell on the surface. This we find causes surface defects, and thus, we develop materials processing strategies to remove the surface shell with a view to achieving efficient charge transfer in CQD solids. As a result, we develop resurfacing protocols, tailored to each dot synthesis, that produce balanced In-to-As stoichiometry regardless of synthetic input, enabling us to fabricate NIR photodetectors that achieve best-in-class EQEs at 940 nm excitons (25-28%, biased), independent of the synthetic pathway.
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Affiliation(s)
- Hyeong Woo Ban
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Maral Vafaie
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Larissa Levina
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Pan Xia
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Muhammad Imran
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Yanjiang Liu
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Amin Morteza Najarian
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, ON M5S 3G4, Canada
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2
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Chowdhury M, Esteban DA, Amin R, Román-Freijeiro C, Rösch EL, Etzkorn M, Schilling M, Ludwig F, Bals S, Salgueiriño V, Lak A. Organic Molecular Glues to Design Three-Dimensional Cubic Nano-assemblies of Magnetic Nanoparticles. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:6865-6876. [PMID: 39070672 PMCID: PMC11270742 DOI: 10.1021/acs.chemmater.4c00770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 06/18/2024] [Accepted: 06/21/2024] [Indexed: 07/30/2024]
Abstract
Self-assembled magnetic nanoparticles offer next-generation materials that allow harnessing of their physicochemical properties for many applications. However, how three-dimensional nanoassemblies of magnetic nanoparticles can be synthesized in one-pot synthesis without excessive postsynthesis processes is still a bottleneck. Here, we propose a panel of small organic molecules that glue nanoparticle crystallites during the growth of particles to form large nanoassembled nanoparticles (NANs). We find that both carbonyl and carboxyl functional groups, presenting in benzaldehyde and benzoic acid, respectively, are needed to anchor with metal ions, while aromatic rings are needed to create NANs through π-π stacking. When benzyl alcohol, lacking carbonyl and carboxyl groups, is employed, no NANs are formed. NANs formed by benzoic acid reveal a unique combination of high magnetization and coercivity, whereas NANs formed by benzaldehyde show the largest exchange bias reported in nanoparticles. Surprisingly, our NANs show unconventional colloidal stability due to their unique nanoporous architectures.
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Affiliation(s)
- Mohammad
Suman Chowdhury
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | | | - Rabia Amin
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | | | - Enja Laureen Rösch
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | - Markus Etzkorn
- Institute
of Applied Physics, TU Braunschweig, Mendelssohnstraße 2, Braunschweig 38106, Germany
| | - Meinhard Schilling
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | - Frank Ludwig
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
| | - Sara Bals
- EMAT,
University of Antwerp, Groenenborgerlaan 171, Antwerp B-2020, Belgium
| | - Verónica Salgueiriño
- CINBIO,
Universidade de Vigo, Vigo 36310, Spain
- Departamento
de Física Aplicada, Universidade
de Vigo, Vigo 36310, Spain
| | - Aidin Lak
- Institute
for Electrical Measurement Science and Fundamental Electrical Engineering
and Laboratory for Emerging Nanometrology (LENA), Hans-Sommer-Str. 66, Braunschweig 38106, Germany
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3
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Sun R, Zang J, Lai R, Yang W, Ji B. Near-Infrared-to-Visible Photon Upconversion with Efficiency Exceeding 21% Sensitized by InAs Quantum Dots. J Am Chem Soc 2024; 146:17618-17623. [PMID: 38899905 DOI: 10.1021/jacs.4c04997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Upconversion (UC) of incoherent near-infrared (NIR) photons to visible photons through sensitized triplet-triplet annihilation (TTA) shows great potential in solar energy harvesting, photocatalysis, and bioimaging. However, the efficiencies of NIR-to-visible TTA-UC systems lag considerably behind those of their visible-to-visible counterparts. Here, we report a novel NIR-to-yellow TTA-UC system with a record quantum yield (QY) of 21.1% (out of a 100% maximum) and a threshold intensity of 20.2 W/cm2 by using InAs-based colloidal quantum dots (QDs) as triplet photosensitizers. The key to success is the epitaxial growth of an ultrathin ZnSe shell on InAs QDs that passivates the surface defects without impeding triplet energy transfer (TET) from QDs to surface-bound tetracene. Transient absorption spectroscopy verifies efficient TET efficiency of more than 80%, along with sufficiently long triplet lifetime of tetracene molecules, leading to high-performance UC. Moreover, high UC QYs (>18%) remain when larger InAs-based QDs─of which the absorption peak is red-shifted by more than 50 nm─are used as sensitizers, indicating the great potential of InAs QDs to utilize NIR photons with lower energy.
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Affiliation(s)
- Ruijia Sun
- Zhejiang University, Hangzhou, Zhejiang 310027, China
- School of Engineering, Westlake University, Hangzhou 310030, China
- Zhejiang Key Laboratory of 3D Micro/Nano Fabrication and Characterization, Westlake University, Hangzhou 310030, China
| | - Jianyang Zang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
| | - Runchen Lai
- Instrumentation and Service Center for Molecular Sciences, Westlake University, Hangzhou 310030, China
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Westlake University, Hangzhou 310030, China
| | - Wenxing Yang
- Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, Zhejiang, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China
- Division of Solar Energy Conversion and Catalysis at Westlake University, Zhejiang Baima Lake Laboratory Co., Ltd., Hangzhou 310000, China
| | - Botao Ji
- School of Engineering, Westlake University, Hangzhou 310030, China
- Zhejiang Key Laboratory of 3D Micro/Nano Fabrication and Characterization, Westlake University, Hangzhou 310030, China
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4
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Kim M, Lee J, Jung J, Shin D, Kim J, Cho E, Xing Y, Jeong H, Park S, Oh SH, Kim YH, Jeong S. Surface-Originated Weak Confinement in Tetrahedral Indium Arsenide Quantum Dots. J Am Chem Soc 2024; 146:10251-10256. [PMID: 38587307 PMCID: PMC11027140 DOI: 10.1021/jacs.4c00966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/14/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
While the shape-dependent quantum confinement (QC) effect in anisotropic semiconductor nanocrystals has been extensively studied, the QC in facet-specified polyhedral quantum dots (QDs) remains underexplored. Recently, tetrahedral nanocrystals have gained prominence in III-V nanocrystal synthesis. In our study, we successfully synthesized well-faceted tetrahedral InAs QDs with a first excitonic absorption extending up to 1700 nm. We observed an unconventional sizing curve, indicating weaker confinement than for equivalently volumed spherical QDs. The (111) surface states of InAs QDs persist at the conduction band minimum state even after ligand passivation with a significantly reduced band gap, which places tetrahedral QDs at lower energies in the sizing curve. Consequently, films composed of tetrahedral QDs demonstrate an extended photoresponse into the short-wave infrared region, compared to isovolume spherical QD films.
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Affiliation(s)
- Meeree Kim
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
| | - Junho Lee
- Department
of Physics, Korea Advanced Institute of
Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Jaegwan Jung
- Department
of Physics, Korea Advanced Institute of
Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Daekwon Shin
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
| | - Jugyoung Kim
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
| | - Eunhye Cho
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
| | - Yaolong Xing
- Department
of Energy Engineering, KENTECH Institute for Energy Materials and
Devices, Korea Institute of Energy Technology
(KENTECH), Naju-si 58330, Jeonnam, Republic of Korea
| | - Hyeonjun Jeong
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
| | - Seongmin Park
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
| | - Sang Ho Oh
- Department
of Energy Engineering, KENTECH Institute for Energy Materials and
Devices, Korea Institute of Energy Technology
(KENTECH), Naju-si 58330, Jeonnam, Republic of Korea
| | - Yong-Hyun Kim
- Department
of Physics, Korea Advanced Institute of
Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- School
of Physics, Institute of Science, Suranaree
University of Technology, Nakhon
Ratchasima 30000, Thailand
| | - Sohee Jeong
- Department
of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic
of Korea
- Sungkyunkwan
Institute of Energy Science and Technology (SIEST), Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea
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5
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Sandeno S, Krajewski SM, Beck RA, Kaminsky W, Li X, Cossairt BM. Synthesis and Single Crystal X-ray Diffraction Structure of an Indium Arsenide Nanocluster. ACS CENTRAL SCIENCE 2024; 10:744-751. [PMID: 38559306 PMCID: PMC10979481 DOI: 10.1021/acscentsci.3c01451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/14/2024] [Accepted: 02/16/2024] [Indexed: 04/04/2024]
Abstract
The discovery of magic-sized clusters as intermediates in the synthesis of colloidal quantum dots has allowed for insight into formation pathways and provided atomically precise molecular platforms for studying the structure and surface chemistry of those materials. The synthesis of monodisperse InAs quantum dots has been developed through the use of indium carboxylate and As(SiMe3)3 as precursors and documented to proceed through the formation of magic-sized intermediates. Herein, we report the synthesis, isolation, and single-crystal X-ray diffraction structure of an InAs nanocluster that is ubiquitous across reports of InAs quantum dot synthesis. The structure, In26As18(O2CR)24(PR'3)3, differs substantially from previously reported semiconductor nanocluster structures even within the III-V family. However, it can be structurally linked to III-V and II-VI cluster structures through the anion sublattice. Further analysis using variable temperature absorbance spectroscopy and support from computation deepen our understanding of the reported structure and InAs nanomaterials as a whole.
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Affiliation(s)
- Soren
F. Sandeno
- Department of Chemistry, University
of Washington, Box 351700, Seattle, Washington 98195-1700, United
States
| | - Sebastian M. Krajewski
- Department of Chemistry, University
of Washington, Box 351700, Seattle, Washington 98195-1700, United
States
| | - Ryan A. Beck
- Department of Chemistry, University
of Washington, Box 351700, Seattle, Washington 98195-1700, United
States
| | - Werner Kaminsky
- Department of Chemistry, University
of Washington, Box 351700, Seattle, Washington 98195-1700, United
States
| | - Xiaosong Li
- Department of Chemistry, University
of Washington, Box 351700, Seattle, Washington 98195-1700, United
States
| | - Brandi M. Cossairt
- Department of Chemistry, University
of Washington, Box 351700, Seattle, Washington 98195-1700, United
States
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6
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Shin J, Choi M, Shim D, Ziehl TJ, Park S, Cho E, Zhang P, Lee H, Kang J, Jeong S. Unveiling the Nanocluster Conversion Pathway for Highly Monodisperse InAs Colloidal Quantum Dots. JACS AU 2024; 4:1097-1106. [PMID: 38559718 PMCID: PMC10976596 DOI: 10.1021/jacsau.3c00809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 04/04/2024]
Abstract
Colloidal quantum dots (CQDs) have garnered significant attention in nanoscience and technology, with a particular emphasis on achieving high monodispersity in their synthesis. Recent advances in understanding the chemistry of reaction intermediates such as magic-sized nanoclusters (MSC) have paved the way for innovative synthetic strategies. Notably, monodisperse CQDs of various compositions, including indium phosphide, indium arsenide, and cadmium chalcogenide, have been successfully prepared using nanocluster intermediates as single-source precursors. Still, the early stage conversion chemistry of these nanoclusters preceding CQD formation has not been fully unveiled yet. Herein, we report the first-order conversion of amorphous nanoclusters (AMCs) to InAs MSCs prior to the formation of CQDs. We find that MSC, isolated via gel-permeation chromatography, is more stable than purified AMCs, as demonstrated in various chemical and thermolytic reactions. While the surface of InAs AMCs and MSC is similarly bound with carboxylate ligands, detailed structural analyses employing synchrotron X-ray scattering and X-ray absorption spectroscopy unveil subtle distinctions arising from the distinct surface properties and structural disorder characteristics of InAs nanoclusters. We propose that InAs AMCs undergo a surface reduction and structural ordering process, resulting in the formation of an InAs MSC in a thermodynamically local minimum state. Furthermore, we demonstrate that both types of nanoclusters serve as viable precursors, providing a similar monomer supply rate at elevated temperatures of around 300 °C. This study offers invaluable insights into the interplay of structure and chemical stability in binary nanoclusters, enhancing our ability to design these nanoclusters as precursors for highly monodisperse CQDs.
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Affiliation(s)
- Jibin Shin
- Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do 16419, South Korea
| | - Mahnmin Choi
- Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do 16419, South Korea
| | - Doeun Shim
- Department of Physics and Chemistry, DGIST, Daegu 42988, South Korea
| | - Tyler Joe Ziehl
- Department of Chemistry, Dalhousie University, 6299 South Street, Halifax NSB3H 4R2, Canada
| | - Seongmin Park
- Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do 16419, South Korea
| | - Eunhye Cho
- Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do 16419, South Korea
| | - Peng Zhang
- Department of Chemistry, Dalhousie University, 6299 South Street, Halifax NSB3H 4R2, Canada
| | - Hangil Lee
- Department of Chemistry, Sookmyung Women's University, Seoul 04310, South Korea
| | - Joongoo Kang
- Department of Physics and Chemistry, DGIST, Daegu 42988, South Korea
| | - Sohee Jeong
- Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do 16419, South Korea
- Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do 16419, South Korea
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7
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Lee J, Zhao T, Yang S, Muduli M, Murray CB, Kagan CR. One-pot heat-up synthesis of short-wavelength infrared, colloidal InAs quantum dots. J Chem Phys 2024; 160:071103. [PMID: 38380752 DOI: 10.1063/5.0187162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 01/22/2024] [Indexed: 02/22/2024] Open
Abstract
III-V colloidal quantum dots (QDs) promise Pb and Hg-free QD compositions with which to build short-wavelength infrared (SWIR) optoelectronic devices. However, their synthesis is limited by the availability of group-V precursors with controllable reactivities to prepare monodisperse, SWIR-absorbing III-V QDs. Here, we report a one-pot heat-up method to synthesize ∼8 nm edge length (∼6.5 nm in height) tetrahedral, SWIR-absorbing InAs QDs by increasing the [In3+]:[As3+] ratio introduced using commercially available InCl3 and AsCl3 precursors and by decreasing the concentration and optimizing the volume of the reducing reagent superhydride to control the concentration of In(0) and As(0) intermediates through QD nucleation and growth. InAs QDs are treated with NOBF4, and their deposited films are exchanged with Na2S to yield n-type InAs QD films. We realize the only colloidal InAs QD photoconductors with responsivity at the technologically important wavelength of 1.55 μm.
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Affiliation(s)
- J Lee
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - T Zhao
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - S Yang
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - M Muduli
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - C B Murray
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - C R Kagan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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8
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Ondry JC, Gupta A, Zhou Z, Chang JH, Talapin DV. Synthesis of Ternary and Quaternary Group III-Arsenide Colloidal Quantum Dots via High-Temperature Cation Exchange in Molten Salts: The Importance of Molten Salt Speciation. ACS NANO 2024; 18:858-873. [PMID: 38108289 DOI: 10.1021/acsnano.3c09490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Colloidal semiconductor nanocrystals are an important class of materials which have many desirable optoelectronic properties. In their bulk phases, gallium- and aluminum-containing III-V materials such as GaAs, GaP, and Al1-xGaxAs represent some of the most technologically important semiconductors. However, their colloidal synthesis by traditional methods is difficult due to the high temperatures needed to crystallize these highly covalent materials and the extreme reactivity of Ga- and Al- precursors toward organic solvents at such high temperatures. A recently developed paradigm shift in the synthesis of these materials is to use molten inorganic salts as solvents to prepare Ga- containing III-V colloidal nanocrystals by cation exchange of the corresponding indium pnictide (InPn) colloidal nanocrystals. There have been several successful applications of molten salt solvents to prepare III-phosphide colloidal nanocrystals. However, little is known about the nature of these reaction environments at the relevant reaction conditions and synthesis of III-arsenide colloidal nanocrystals remains challenging. Herein we report a detailed study on cation exchange of InPn nanocrystals using nominally Lewis basic molten salt solvents with added gallium halides. Surprisingly, these salt systems phase separate into two immiscible phases, and the nanocrystals preferentially segregate to one of the phases. Using a suite of in situ spectroscopy tools, we identify the phase the nanocrystals segregate to as Lewis neutral alkali tetrahalogallate molten salts. We apply in situ high-temperature Raman spectroscopy to identify the chemical species present in several molten salt compositions at experimentally relevant reaction conditions to elucidate a molecular basis for the reactivity observed. We then employ Lewis neutral KGaI4 molten salts to prepare high-quality In1-xGaxAs and In1-xGaxP nanocrystals and demonstrate that deviation from Lewis neutral conditions accelerate nanocrystal decomposition in the case of III-arsenide materials. Further, we expand to KAlI4-based molten salts to prepare In1-x-yGaxAlyAs nanocrystals which represent an example of solution-synthesized quaternary III-V nanocrystals. These insights provide a molecular basis for the rational development of molten salt solvents, thus allowing the preparation of a diverse array of multicomponent III-V colloidal nanocrystals.
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Affiliation(s)
- Justin C Ondry
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Aritrajit Gupta
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Zirui Zhou
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Jun Hyuk Chang
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Dmitri V Talapin
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
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9
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Seo H, Eun HJ, Lee AY, Lee HK, Kim JH, Kim S. Colloidal InSb Quantum Dots for 1500 nm SWIR Photodetector with Antioxidation of Surface. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306439. [PMID: 38036427 PMCID: PMC10811490 DOI: 10.1002/advs.202306439] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/06/2023] [Indexed: 12/02/2023]
Abstract
III-V quantum dots (QDs) have emerged as significant alternatives to Cd- and Pb-based QDs, garnering notable attention over the past two decades. However, the understanding of III-V QDs, particularly in the short wave-infrared (SWIR) region, remains limited. InAs QDs are widely recognized as the most prominent SWIR QDs, but their absorption beyond 1400 nm presents various challenges. Consequently, InSb QDs with relatively narrower bandgaps have been investigated; however, research on their device applications is lacking. In this study, InSb QDs are synthesized with absorption ranging from 1000 to 1700 nm by introducing Cl- ions to enhance QD surface stability during synthesis. Additionally, it coated InAs and ZnSe shells onto the InSb QDs to validate photoluminescence in the SWIR region and improve photostability. Subsequently, these QDs are employed in the fabrication of photodetector devices, resulting in photodetection above 1500 nm using Pb-free QDs. The photodetection device exhibited an external quantum efficiency (EQE) of 11.4% at 1370 nm and 6.3% at 1520 nm for InSb core QDs, and 4.6% at 1520 nm for InSb/InAs core/shell QDs, marking the successful implementation of such a device. In detail, the 1520 nm for InSb core device showed a dark current density(JD ) value of: 1.46 × 10-9 A/cm2 , responsivity(R): 0.078 A/W, and specific detectivity based on the shot noise(Dsh *): 3.6 × 1012 Jones at 0 V.
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Affiliation(s)
- Haewoon Seo
- Department of Molecular Science and TechnologyAI‐Superconvergence KIURI Translational Research CenterAjou UniversitySuwonGyeonggi‐do443–749Republic of Korea
| | - Hyeong Ju Eun
- Department of Molecular Science and TechnologyAjou UniversitySuwonGyeonggi‐do443–749Republic of Korea
| | - Ah Yeong Lee
- Department of Molecular Science and TechnologyAjou UniversitySuwonGyeonggi‐do443–749Republic of Korea
| | - Hang Ken Lee
- Advanced Energy Materials Research CenterKorea Research Institute of Chemical Technology (KRICT)Daejeon34114Republic of Korea
| | - Jong H. Kim
- Department of Molecular Science and TechnologyAjou UniversitySuwonGyeonggi‐do443–749Republic of Korea
| | - Sang‐Wook Kim
- Department of Molecular Science and TechnologyAjou UniversitySuwonGyeonggi‐do443–749Republic of Korea
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10
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Sheikh T, Mir WJ, Nematulloev S, Maity P, Yorov KE, Hedhili MN, Emwas AH, Khan MS, Abulikemu M, Mohammed OF, Bakr OM. InAs Nanorod Colloidal Quantum Dots with Tunable Bandgaps Deep into the Short-Wave Infrared. ACS NANO 2023; 17:23094-23102. [PMID: 37955579 DOI: 10.1021/acsnano.3c08796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
InAs colloidal quantum dots (CQDs) have emerged as candidate lead- and mercury-free solution-processed semiconductors for infrared technology due to their appropriate bulk bandgap, which can be tuned by quantum confinement, and promising charge-carrier transport properties. However, the lack of suitable arsenic precursors and readily accessible synthesis conditions have limited InAs CQDs to smaller sizes (<7 nm), with bandgaps largely restricted to <1400 nm in the near-infrared spectral window. Conventional InAs CQD synthesis requires highly reactive, hazardous arsenic precursors, which are commercially scarce, making the synthesis hard to control and study. Here, we present a controlled synthesis strategy (using only readily available and less reactive precursors) to overcome the practical wavelength limitation of InAs CQDs, achieving monodisperse InAs nanorod CQDs with bandgaps tunable from ∼1200 to ∼1800 nm, thus crossing deep into the short-wave infrared (SWIR) region. By controlling the reactivity through in situ precursor complexation, we isolate the reaction mechanism, producing InAs nanorod CQDs that display narrow excitonic features and efficient carrier multiplication. Our work enables InAs CQDs for a wider range of SWIR applications.
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Affiliation(s)
- Tariq Sheikh
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Wasim J Mir
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Saidkhodzha Nematulloev
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Partha Maity
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Khursand E Yorov
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mohamed Nejib Hedhili
- KAUST Core Laboratories, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Abdul-Hamid Emwas
- KAUST Core Laboratories, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mudeha Shafat Khan
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mutalifu Abulikemu
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Omar F Mohammed
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M Bakr
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
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11
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Yoon JI, Kim H, Kim M, Cho H, Kwon YA, Choi M, Park S, Kim T, Lee S, Jo H, Kim B, Cho JH, Park JS, Jeong S, Kang MS. P- and N-type InAs nanocrystals with innately controlled semiconductor polarity. SCIENCE ADVANCES 2023; 9:eadj8276. [PMID: 37948529 PMCID: PMC10637754 DOI: 10.1126/sciadv.adj8276] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/10/2023] [Indexed: 11/12/2023]
Abstract
InAs semiconductor nanocrystals (NCs) exhibit intriguing electrical/optoelectronic properties suitable for next-generation electronic devices. Although there is a need for both n- and p-type semiconductors in such devices, InAs NCs typically exhibit only n-type characteristics. Here, we report InAs NCs with controlled semiconductor polarity. Both p- and n-type InAs NCs can be achieved from the same indium chloride and aminoarsine precursors but by using two different reducing agents, diethylzinc for p-type and diisobutylaluminum hydride for n-type NCs, respectively. This is the first instance of semiconductor polarity control achieved at the synthesis level for InAs NCs and the entire semiconductor nanocrystal systems. Comparable field-effective mobilities for holes (3.3 × 10-3 cm2/V·s) and electrons (3.9 × 10-3 cm2/V·s) are achieved from the respective NC films. The mobility values allow the successful fabrication of complementary logic circuits, including NOT, NOR, and NAND comprising photopatterned p- and n-channels based on InAs NCs.
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Affiliation(s)
- Jong Il Yoon
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
| | - Hyoin Kim
- Department of Energy Science (DOES), Center for Artificial Atoms, and Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Meeree Kim
- Department of Energy Science (DOES), Center for Artificial Atoms, and Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hwichan Cho
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
| | - Yonghyun Albert Kwon
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Mahnmin Choi
- Department of Energy Science (DOES), Center for Artificial Atoms, and Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seongmin Park
- Department of Energy Science (DOES), Center for Artificial Atoms, and Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Taewan Kim
- Department of Energy Science (DOES), Center for Artificial Atoms, and Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seunghan Lee
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
| | - Hyunwoo Jo
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
| | - BongSoo Kim
- Department of Chemistry, Graduate School of Semiconductor Materials and Device Engineering, and Graduate School of Cabon Neutrality, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jeong Ho Cho
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Ji-Sang Park
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sohee Jeong
- Department of Energy Science (DOES), Center for Artificial Atoms, and Sungkyunkwan Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Future Energy Engineering (DFEE), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Moon Sung Kang
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Republic of Korea
- Institute of Emergent Materials, Ricci Institute of Basic Science, Sogang University, Seoul 04107, Republic of Korea
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12
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Leemans J, Respekta D, Bai J, Braeuer S, Vanhaecke F, Hens Z. Formation of Colloidal In(As,P) Quantum Dots Active in the Short-Wave Infrared, Promoting Growth through Temperature Ramps. ACS NANO 2023; 17:20002-20012. [PMID: 37787479 DOI: 10.1021/acsnano.3c05138] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Colloidal InAs quantum dots (QDs) are widely studied as a printable optoelectronic material for short-wave infrared (SWIR) that is not restricted by regulations on hazardous substances. Such applications, however, require synthetic procedures that yield QDs with adjustable sizes at the end of the reaction. Here, we show that such one-size-one-batch protocols can be realized through temperature profiles that involve a rapid transition from a lower injection temperature to a higher reaction temperature. By expediting the transition to the reaction temperature and reducing the overall synthesis concentration, we can tune QD sizes from 4.5 to 10 nm, the latter corresponding to a band gap transition at 1600 nm. We argue that the temperature ramps provide a more distinct separation between nucleation at low temperature and growth at high temperature such that larger QDs are obtained by minimizing the nucleation time. The synthetic procedures introduced here will strongly promote the development of a SWIR optoelectronic technology based on InAs QDs, while the use of temperature profiles to steer a colloidal synthesis can find applications well beyond the specific case of InAs QDs.
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Affiliation(s)
- Jari Leemans
- Physics and Chemistry of Nanostructures, Department of Chemistry, Ghent University, 9000 Gent, Belgium
- Center for Nano and Biophotonics, Ghent University, 9000 Gent, Belgium
| | - Dobromił Respekta
- Physics and Chemistry of Nanostructures, Department of Chemistry, Ghent University, 9000 Gent, Belgium
- Center for Nano and Biophotonics, Ghent University, 9000 Gent, Belgium
| | - Jing Bai
- Physics and Chemistry of Nanostructures, Department of Chemistry, Ghent University, 9000 Gent, Belgium
- Center for Nano and Biophotonics, Ghent University, 9000 Gent, Belgium
| | - Simone Braeuer
- A&MS Research Group, Department of Chemistry, Ghent University, 9000 Gent, Belgium
| | - Frank Vanhaecke
- A&MS Research Group, Department of Chemistry, Ghent University, 9000 Gent, Belgium
| | - Zeger Hens
- Physics and Chemistry of Nanostructures, Department of Chemistry, Ghent University, 9000 Gent, Belgium
- Center for Nano and Biophotonics, Ghent University, 9000 Gent, Belgium
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13
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Vafaie M, Morteza Najarian A, Xu J, Richter LJ, Li R, Zhang Y, Imran M, Xia P, Ban HW, Levina L, Singh A, Meitzner J, Pattantyus-Abraham AG, García de Arquer FP, Sargent EH. Molecular surface programming of rectifying junctions between InAs colloidal quantum dot solids. Proc Natl Acad Sci U S A 2023; 120:e2305327120. [PMID: 37788308 PMCID: PMC10576070 DOI: 10.1073/pnas.2305327120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 09/05/2023] [Indexed: 10/05/2023] Open
Abstract
Heavy-metal-free III-V colloidal quantum dots (CQDs) show promise in optoelectronics: Recent advancements in the synthesis of large-diameter indium arsenide (InAs) CQDs provide access to short-wave infrared (IR) wavelengths for three-dimensional ranging and imaging. In early studies, however, we were unable to achieve a rectifying photodiode using CQDs and molybdenum oxide/polymer hole transport layers, as the shallow valence bandedge (5.0 eV) was misaligned with the ionization potentials of the widely used transport layers. This occurred when increasing CQD diameter to decrease the bandgap below 1.1 eV. Here, we develop a rectifying junction among InAs CQD layers, where we use molecular surface modifiers to tune the energy levels of InAs CQDs electrostatically. Previously developed bifunctional dithiol ligands, established for II-VI and IV-VI CQDs, exhibit slow reaction kinetics with III-V surfaces, causing the exchange to fail. We study carboxylate and thiolate binding groups, united with electron-donating free end groups, that shift upward the valence bandedge of InAs CQDs, producing valence band energies as shallow as 4.8 eV. Photophysical studies combined with density functional theory show that carboxylate-based passivants participate in strong bidentate bridging with both In and As on the CQD surface. The tuned CQD layer incorporated into a photodiode structure achieves improved performance with EQE (external quantum efficiency) of 35% (>1 μm) and dark current density < 400 nA cm-2, a >25% increase in EQE and >90% reduced dark current density compared to the reference device. This work represents an advance over previous III-V CQD short-wavelength IR photodetectors (EQE < 5%, dark current > 10,000 nA cm-2).
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Affiliation(s)
- Maral Vafaie
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Amin Morteza Najarian
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Jian Xu
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Lee J. Richter
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD20899
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, New York, NY11973
| | - Yangning Zhang
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Muhammad Imran
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Pan Xia
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Hyeong Woo Ban
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Larissa Levina
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
| | - Ajay Singh
- STMicroelectronics, Digital Front-end Manufacturing and Technology, Technology for Optical Sensors, Fremont, CA94538
| | - Jet Meitzner
- STMicroelectronics, Digital Front-end Manufacturing and Technology, Technology for Optical Sensors, Fremont, CA94538
| | - Andras G. Pattantyus-Abraham
- STMicroelectronics, Digital Front-end Manufacturing and Technology, Technology for Optical Sensors, Fremont, CA94538
| | - F. Pelayo García de Arquer
- Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona08860, Spain
| | - Edward H. Sargent
- The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, ONM5S 3G4, Canada
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14
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Duan J, Wang J, Hou L, Ji P, Zhang W, Liu J, Zhu X, Sun Z, Ma Y, Ma L. Application of Scanning Tunneling Microscopy and Spectroscopy in the Studies of Colloidal Quantum Qots. CHEM REC 2023; 23:e202300120. [PMID: 37255365 DOI: 10.1002/tcr.202300120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/15/2023] [Indexed: 06/01/2023]
Abstract
Colloidal quantum dots display remarkable optical and electrical characteristics with the potential for extensive applications in contemporary nanotechnology. As an ideal instrument for examining surface topography and local density of states (LDOS) at an atomic scale, scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) has become indispensable approaches to gain better understanding of their physical properties. This article presents a comprehensive review of the research advancements in measuring the electronic orbits and corresponding energy levels of colloidal quantum dots in various systems using STM and STS. The first three sections introduce the basic principles of colloidal quantum dots synthesis and the fundamental methodology of STM research on quantum dots. The fourth section explores the latest progress in the application of STM for colloidal quantum dot studies. Finally, a summary and prospective is presented.
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Affiliation(s)
- Jiaying Duan
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Jiapeng Wang
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Liangpeng Hou
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Peixuan Ji
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Wusheng Zhang
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Jin Liu
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Xiaodong Zhu
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Zhixiang Sun
- Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin, China, 300072
| | - Yanqing Ma
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
| | - Lei Ma
- Tianjin International Center for Nanoparticles and NanoSystems, Tianjin University, Tianjin, China, 300072
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15
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Zhu D, Bahmani Jalali H, Saleh G, Di Stasio F, Prato M, Polykarpou N, Othonos A, Christodoulou S, Ivanov YP, Divitini G, Infante I, De Trizio L, Manna L. Boosting the Photoluminescence Efficiency of InAs Nanocrystals Synthesized with Aminoarsine via a ZnSe Thick-Shell Overgrowth. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2303621. [PMID: 37243572 DOI: 10.1002/adma.202303621] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/18/2023] [Indexed: 05/29/2023]
Abstract
InAs-based nanocrystals can enable restriction of hazardous substances (RoHS) compliant optoelectronic devices, but their photoluminescence efficiency needs improvement. We report an optimized synthesis of InAs@ZnSe core@shell nanocrystals allowing to tune the ZnSe shell thickness up to seven mono-layers (ML) and to boost the emission, reaching a quantum yield of ≈70% at ≈900 nm. It is demonstrated that a high quantum yield can be attained when the shell thickness is at least ≈3ML. Notably, the photoluminescence lifetimeshows only a minor variation as a function of shell thickness, whereas the Auger recombination time (a limiting aspect in technological applications when fast) slows down from 11 to 38 ps when increasing the shell thickness from 1.5 to 7MLs. Chemical and structural analyses evidence that InAs@ZnSe nanocrystals do not exhibit any strain at the core-shell interface, likely due to the formation of an InZnSe interlayer. This is supported by atomistic modeling, which indicates the interlayer as being composed of In, Zn, Se and cation vacancies, alike to the In2 ZnSe4 crystal structure. The simulations reveal an electronic structure consistent with that of type-I heterostructures, in which localized trap states can be passivated by a thick shell (>3ML) and excitons are confined in the core.
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Affiliation(s)
- Dongxu Zhu
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Houman Bahmani Jalali
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Gabriele Saleh
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Francesco Di Stasio
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Mirko Prato
- Materials Characterization, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Nefeli Polykarpou
- Inorganic Nanocrystals Laboratory, Department of Chemistry, University of Cyprus, Nicosia, 1678, Cyprus
| | - Andreas Othonos
- Laboratory of Ultrafast Science, Department of Physics, University of Cyprus, Nicosia, 1678, Cyprus
| | - Sotirios Christodoulou
- Inorganic Nanocrystals Laboratory, Department of Chemistry, University of Cyprus, Nicosia, 1678, Cyprus
| | - Yurii P Ivanov
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Giorgio Divitini
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Ivan Infante
- BCMaterials, Basque Center for Materials, Applications, and Nanostructures, UPV/EHU Science Park, Leioa, 48940, Spain
- Ikerbasque Basque Foundation for Science, Bilbao, 48009, Spain
| | - Luca De Trizio
- Chemistry Facility, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
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16
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Liu Z, Pascazio R, Goldoni L, Maggioni D, Zhu D, Ivanov YP, Divitini G, Camarelles JL, Jalali HB, Infante I, De Trizio L, Manna L. Colloidal InAs Tetrapods: Impact of Surfactants on the Shape Control. J Am Chem Soc 2023; 145:18329-18339. [PMID: 37608781 PMCID: PMC10450814 DOI: 10.1021/jacs.3c03906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Indexed: 08/24/2023]
Abstract
We have approached the synthesis of colloidal InAs nanocrystals (NCs) using amino-As and ligands that are different from the commonly employed oleylamine (OA). We found that carboxylic and phosphonic acids led only to oxides, whereas tri-n-octylphosphine, dioctylamine, or trioctylamine (TOA), when employed as the sole ligands, yielded InAs NCs with irregular sizes and a broad size distribution. Instead, various combinations of TOA and OA delivered InAs NCs with good control over the size distribution, and the TOA:OA volume ratio of 4:1 generated InAs tetrapods with arm length of 5-6 nm. Contrary to tetrapods of II-VI materials, which have a zinc-blende core and wurtzite arms, these NCs are entirely zinc-blende, with arms growing along the ⟨111⟩ directions. They feature a narrow excitonic peak at ∼950 nm in absorption and a weak photoluminescence emission at 1050 nm. Our calculations indicated that the bandgap of the InAs tetrapods is mainly governed by the size of their core and not by their arm lengths when these are longer than ∼3 nm. Nuclear magnetic resonance analyses revealed that InAs tetrapods are mostly passivated by OA with only a minor fraction of TOA. Molecular dynamics simulations showed that OA strongly binds to the (111) facets whereas TOA weakly binds to the edges and corners of the NCs and their combined use (at high TOA:OA volume ratios) promotes growth along the ⟨111⟩ directions, eventually forming tetrapods. Our work highlights the use of mixtures of ligands as a means of improving control over InAs NCs size and size distribution.
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Affiliation(s)
- Zheming Liu
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
di Genova, 16146 Genova, Italy
| | - Roberta Pascazio
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
di Genova, 16146 Genova, Italy
| | - Luca Goldoni
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Daniela Maggioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Dongxu Zhu
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Yurii P. Ivanov
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Giorgio Divitini
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Jordi Llusar Camarelles
- BCMaterials,
Basque Center for Materials, Applications, and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
| | - Houman Bahmani Jalali
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Ivan Infante
- BCMaterials,
Basque Center for Materials, Applications, and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
- Ikerbasque
Basque Foundation for Science Bilbao 48009, Spain
| | - Luca De Trizio
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry, Analytical Chemistry, Materials Characterization, Electron Spectroscopy
and Nanoscopy, Photonic Nanomaterials and Chemistry Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
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17
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Kim JH, Jung BK, Kim SK, Yun KR, Ahn J, Oh S, Jeon MG, Lee TJ, Kim S, Oh N, Oh SJ, Seong TY. Ultrasensitive Near-Infrared InAs Colloidal Quantum Dot-ZnON Hybrid Phototransistor Based on a Gradated Band Structure. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2207526. [PMID: 37088787 DOI: 10.1002/advs.202207526] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/14/2023] [Indexed: 05/03/2023]
Abstract
Amorphous metal oxide semiconductor phototransistors (MOTPs) integrated with colloidal quantum dots (QDs) (QD-MOTPs) are promising infrared photodetectors owing to their high photoconductive gain, low off-current level, and high compatibility with pixel circuits. However, to date, the poor mobility of conventional MOTPs, such as indium gallium zinc oxide (IGZO), and the toxicity of lead (Pb)-based QDs, such as lead sulfide and lead selenide, has limited the commercial applications of QD-MOTPs. Herein, an ultrasensitive QD-MOTP fabricated by integrating a high-mobility zinc oxynitride (ZnON)-based MOTP and lead-free indium arsenide (InAs) QDs is demonstrated. A new gradated bandgap structure is introduced in the InAs QD layer that absorbs infrared light, which prevents carriers from moving backward and effectively reduces electron-hole recombination. Chemical, optical, and structural analyses confirm the movement of the photoexcited carriers in the graded band structure. The novel QD-MOTP exhibits an outstanding performance with a responsivity of 1.15 × 105 A W-1 and detectivity of 5.32 × 1016 Jones at a light power density of 2 µW cm-2 under illumination at 905 nm.
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Affiliation(s)
- Jong-Ho Kim
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Byung Ku Jung
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Su-Kyung Kim
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Kwang-Ro Yun
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Junhyuk Ahn
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Seongkeun Oh
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Min-Gyu Jeon
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Tae-Ju Lee
- Department of Nanophotonics, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Seongchan Kim
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04673, Republic of Korea
| | - Nuri Oh
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04673, Republic of Korea
| | - Soong Ju Oh
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Tae-Yeon Seong
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
- Department of Nanophotonics, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
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18
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Kim S, Park S, Kim M, Jeong S. Synthesis of single‐crystalline
InP
tetrapod nanocrystals via addition of
ZnCl
2
. B KOREAN CHEM SOC 2023. [DOI: 10.1002/bkcs.12684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Sunghu Kim
- Department of Energy Science (DOES) and Center for Artificial Atoms Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do South Korea
| | - Seongmin Park
- Department of Energy Science (DOES) and Center for Artificial Atoms Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do South Korea
- SKKU Institute of Energy Science and Technology (SIEST) Suwon Gyeonggi‐do South Korea
| | - Meeree Kim
- Department of Energy Science (DOES) and Center for Artificial Atoms Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do South Korea
- SKKU Institute of Energy Science and Technology (SIEST) Suwon Gyeonggi‐do South Korea
| | - Sohee Jeong
- Department of Energy Science (DOES) and Center for Artificial Atoms Sungkyunkwan University (SKKU) Suwon Gyeonggi‐do South Korea
- SKKU Institute of Energy Science and Technology (SIEST) Suwon Gyeonggi‐do South Korea
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19
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Asor L, Liu J, Xiang S, Tessler N, Frenkel AI, Banin U. Zn-Doped P-Type InAs Nanocrystal Quantum Dots. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2208332. [PMID: 36398421 DOI: 10.1002/adma.202208332] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Doped heavy metal-free III-V semiconductor nanocrystal quantum dots (QDs) are of great interest both from the fundamental aspects of doping in highly confined structures, and from the applicative side of utilizing such building blocks in the fabrication of p-n homojunction devices. InAs nanocrystals (NCs), that are of particular relevance for short-wave IR detection and emission applications, manifest heavy n-type character poising a challenge for their transition to p-type behavior. The p-type doping of InAs NCs is presented with Zn - enabling control over the charge carrier type in InAs QDs field effect transistors. The post-synthesis doping reaction mechanism is studied for Zn precursors with varying reactivity. Successful p-type doping is achieved by the more reactive precursor, diethylzinc. Substitutional doping by Zn2+ replacing In3+ is established by X-ray absorption spectroscopy analysis. Furthermore, enhanced near infrared photoluminescence is observed due to surface passivation by Zn as indicated from elemental mapping utilizing high-resolution electron microscopy corroborated by X-ray photoelectron spectroscopy study. The demonstrated ability to control the carrier type, along with the improved emission characteristics, paves the way towards fabrication of optoelectronic devices active in the short-wave infrared region utilizing heavy-metal free nanocrystal building blocks.
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Affiliation(s)
- Lior Asor
- The Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Jing Liu
- Department of Physics and Astronomy, Manhattan College, Riverdale, New York, 10471, USA
| | - Shuting Xiang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York, 11794, USA
- Chemistry Division, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - Nir Tessler
- The Zisapel Nano-Electronics Center, Department of Electrical Engineering, Technion - Israel Institute of Technology, Haifa, 32000, Israel
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York, 11794, USA
- Chemistry Division, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - Uri Banin
- The Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
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20
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Shin J, Choi M, Kim M, Jeong S. Semiconductor clusters: Synthetic precursors for colloidal quantum dots. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.1069178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Semiconductor clusters have been implicated as reaction intermediates between molecular precursors and colloidal quantum dots (CQDs). The success of isolation of semiconductor clusters have enabled detailed investigation of the atomic information of semiconductor clusters. The identification of atomic information has emerged as an important topic because knowledge of the structure-function relationship of intermediate clusters has been helpful to reveal the synthetic mechanism of CQDs. Recently, they have been utilized as the synthetic precursors for CQDs, which was not readily achieved using conventional molecular precursors. This mini review briefly introduces the current understanding of their atomic information such as the composition, structure, and surface. We then discuss advantages, limitations, and the perspective of semiconductor clusters as a precursor for synthesis of CQDs.
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21
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Hahn RVH, Rodríguez-Bolívar S, Rodosthenous P, Skibinsky-Gitlin ES, Califano M, Gómez-Campos FM. Optical Absorption in N-Dimensional Colloidal Quantum Dot Arrays: Influence of Stoichiometry and Applications in Intermediate Band Solar Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3387. [PMID: 36234515 PMCID: PMC9565355 DOI: 10.3390/nano12193387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/21/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
We present a theoretical atomistic study of the optical properties of non-toxic InX (X = P, As, Sb) colloidal quantum dot arrays for application in photovoltaics. We focus on the electronic structure and optical absorption and on their dependence on array dimensionality and surface stoichiometry motivated by the rapid development of experimental techniques to achieve high periodicity and colloidal quantum dot characteristics. The homogeneous response of colloidal quantum dot arrays to different light polarizations is also investigated. Our results shed light on the optical behaviour of these novel multi-dimensional nanomaterials and identify some of them as ideal building blocks for intermediate band solar cells.
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Affiliation(s)
- Rebeca V. H. Hahn
- Departamento de Electrónica y Tecnología de los Computadores, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Salvador Rodríguez-Bolívar
- Departamento de Electrónica y Tecnología de los Computadores, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Panagiotis Rodosthenous
- Pollard Institute, School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Erik S. Skibinsky-Gitlin
- Departamento de Electrónica y Tecnología de los Computadores, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Marco Califano
- Pollard Institute, School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Francisco M. Gómez-Campos
- Departamento de Electrónica y Tecnología de los Computadores, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
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22
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Zhu D, Bellato F, Bahmani Jalali H, Di Stasio F, Prato M, Ivanov YP, Divitini G, Infante I, De Trizio L, Manna L. ZnCl 2 Mediated Synthesis of InAs Nanocrystals with Aminoarsine. J Am Chem Soc 2022; 144:10515-10523. [PMID: 35648676 PMCID: PMC9204758 DOI: 10.1021/jacs.2c02994] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The most developed
approaches for the synthesis of InAs nanocrystals
(NCs) rely on pyrophoric, toxic, and not readily available tris-trimethylsilyl
(or tris-trimethylgermil) arsine precursors. Less toxic and commercially
available chemicals, such as tris(dimethylamino)arsine, have recently
emerged as alternative As precursors. Nevertheless, InAs NCs made
with such compounds need to be further optimized in terms of size
distribution and optical properties in order to meet the standard
reached with tris-trimethylsilyl arsine. To this aim, in this work
we investigated the role of ZnCl2 used as an additive in
the synthesis of InAs NCs with tris(dimethylamino)arsine and alane N,N-dimethylethylamine as the reducing
agent. We discovered that ZnCl2 helps not only to improve
the size distribution of InAs NCs but also to passivate their surface
acting as a Z-type ligand. The presence of ZnCl2 on the
surface of the NCs and the excess of Zn precursor used in the synthesis
enable the subsequent in situ growth of a ZnSe shell,
which is realized by simply adding the Se precursor to the crude reaction
mixture. The resulting InAs@ZnSe core@shell NCs exhibit photoluminescence
emission at ∼860 nm with a quantum yield as high as 42±4%, which is a record for such heterostructures,
given the relatively high mismatch (6%) between InAs and ZnSe. Such
bright emission was ascribed to the formation, under our peculiar
reaction conditions, of an In–Zn–Se intermediate layer
between the core and the shell, as indicated by X-ray photoelectron
spectroscopy and elemental analyses, which helps to release the strain
between the two materials.
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Affiliation(s)
| | - Fulvio Bellato
- Dipartimento di Chimica e Chimica Industriale, Università di Genova, 16146 Genova, Italy
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23
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Kim T, Kim Y, Park S, Park K, Wang Z, Oh SH, Jeong S, Kim D. Shape-Tuned Multiphoton-Emitting InP Nanotetrapods. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110665. [PMID: 35285555 DOI: 10.1002/adma.202110665] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/19/2022] [Indexed: 06/14/2023]
Abstract
As the properties of a semiconductor material depend on the fate of the excitons, manipulating exciton behavior is the primary objective of nanomaterials. Although nanocrystals exhibit unusual excitonic characteristics owing to strong spatial confinement, studying the interactions between excitons in a single nanoparticle remains challenging due to the rapidly vanishing multiexciton species. Here, a platform for exciton tailoring using a straightforward strategy of shape-tuning of single-crystalline nanocrystals is presented. Spectroscopic and theoretical studies reveal a systematic transition of exciton confinement orientation from 3D to 2D, which is solely tuned by the geometric shape of material. Such a precise shape-effect triggers a multiphoton emission in single nanotetrapods with arms longer than the exciton Bohr radius of material. In consequence, the unique interplay between the multiple quantum states allows a geometric modulation of the quantum-confined Stark effect and nanocrystal memory effect in single nanotetrapods. These results provide a useful metric in designing nanomaterials for future photonic applications.
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Affiliation(s)
- Taehee Kim
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
| | - Youngsik Kim
- Department of Energy Science and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Seongmin Park
- Department of Energy Science and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Kyoungwon Park
- Display Research Center, Korea Electronics Technology Institute (KETI), Seongnam, 13509, Republic of Korea
| | - Zhen Wang
- Department of Energy Science and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Sang Ho Oh
- Department of Energy Science and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Sohee Jeong
- Department of Energy Science and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Dongho Kim
- Department of Chemistry, Yonsei University, Seoul, 03722, Republic of Korea
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24
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Zhang B, Altamura D, Caliandro R, Giannini C, Peng L, De Trizio L, Manna L. Stable CsPbBr 3 Nanoclusters Feature a Disk-like Shape and a Distorted Orthorhombic Structure. J Am Chem Soc 2022; 144:5059-5066. [PMID: 35258285 PMCID: PMC8949727 DOI: 10.1021/jacs.1c13544] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
![]()
CsPbBr3 nanoclusters have been synthesized by several
groups and mostly employed as single-source precursors for the synthesis
of anisotropic perovskite nanostructures or perovskite-based heterostructures.
Yet, a detailed characterization of such clusters is still lacking
due to their high instability. In this work, we were able to stabilize
CsPbBr3 nanoclusters by carefully selecting ad hoc ligands
(benzoic acid together with oleylamine) to passivate their surface.
The clusters have a narrow absorption peak at 400 nm, a band-edge
emission peaked at 410 nm at room temperature, and their composition
is identified as CsPbBr2.3. Synchrotron X-ray pair distribution
function measurements indicate that the clusters exhibit a disk-like
shape with a thickness smaller than 2 nm and a diameter of 13 nm,
and their crystal structure is a highly distorted orthorhombic CsPbBr3. Based on small- and wide-angle X-ray scattering analyses,
the clusters tend to form a two-dimensional (2D) hexagonal packing
with a short-range order and a lamellar packing with a long-range
order.
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Affiliation(s)
- Baowei Zhang
- Nanochemistry Department, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy.,Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Davide Altamura
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche (IC-CNR), Via Amendola 122/O, 70126 Bari, Italy
| | - Rocco Caliandro
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche (IC-CNR), Via Amendola 122/O, 70126 Bari, Italy
| | - Cinzia Giannini
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche (IC-CNR), Via Amendola 122/O, 70126 Bari, Italy
| | - Lucheng Peng
- Nanochemistry Department, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Luca De Trizio
- Nanochemistry Department, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry Department, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
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25
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Song D, Zhu M, Li C, Zhou Y, Xie Y, Li Z, Liu Z. Boosting and Activating NIR-IIb Luminescence of Ag 2Te Quantum Dots with a Molecular Trigger. Anal Chem 2021; 93:16932-16939. [PMID: 34878251 DOI: 10.1021/acs.analchem.1c04164] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Near-infrared (NIR) excited and NIR-IIb emissive Ag2Te quantum dots (QDs) display significant advantages in luminescence bioimaging and biosensing due to their unique photophysical properties. However, the poor luminescence intensity and limited strategy for constructing activatable probes severely restrict the wide bioapplications of Ag2Te QDs. Herein, we proposed a NIR dye-sensitization strategy to solve these two problems. First, we used IR-780 as the antenna for Ag2Te QDs to improve the ability of harvesting excitation light, obtaining 21-fold luminescence enhancement at 1620 nm under an 808 nm laser irradiation. Subsequently, by further functionalizing the heptamethine cyanine with a recognition unit of glutathione (GSH), Cy-GSH with target-triggered emission was yielded, which served as the potential sensitizer for Ag2Te QDs to fabricate an activatable ratiometric NIR-IIb nanoprobe for visualizing GSH in vivo with high contrast. This new strategy is expected as a powerful tool to promote the bioapplication of NIR-IIb QDs in the future.
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Affiliation(s)
- Dan Song
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Mengting Zhu
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Chenchen Li
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yan Zhou
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yudan Xie
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Zhen Li
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Zhihong Liu
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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