1
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Rana G, Das S, Singha PK, Ali F, Maji R, Datta A. The effect of Cu(I)-doping on the photoinduced electron transfer from aqueous CdS quantum dots. J Chem Phys 2024; 161:024705. [PMID: 38990118 DOI: 10.1063/5.0218548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Accepted: 06/24/2024] [Indexed: 07/12/2024] Open
Abstract
The doping of CdS quantum dots (QDs) with Cu(I) disrupts electron-hole correlation due to hole trapping by the dopant ion, post-photoexcitation. The present paper examines the effect of such disruption on the rate of photoinduced electron transfer (PET) from the QDs to methyl viologen (MV2+), with implications in their photocatalytic activity. A significantly greater efficiency of PL quenching by MV2+ is observed for the doped QDs than for the undoped ones. Interestingly, the Stern-Volmer plots constructed using PL intensities exhibit an upward curvature for both the cases, while the PL lifetimes remain unaffected. This observation is rationalized by considering the adsorption of the quencher on the surface of the QDs and ultrafast PET post-photoexcitation. Ultrafast transient absorption experiments confirm a faster electron transfer for the doped QDs. It is also realized that the transient absorption experiment yields a more accurate estimate of the binding constant of the quencher with the QDs, than the PL experiment.
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Affiliation(s)
- Gourab Rana
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sharmistha Das
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Prajit Kumar Singha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Fariyad Ali
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Rohan Maji
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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2
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Yang B, Cang J, Li Z, Chen J. Nanocrystals as performance-boosting materials for solar cells. NANOSCALE ADVANCES 2024; 6:1331-1360. [PMID: 38419867 PMCID: PMC10898446 DOI: 10.1039/d3na01063e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/31/2024] [Indexed: 03/02/2024]
Abstract
Nanocrystals (NCs) have been widely studied owing to their distinctive properties and promising application in new-generation photoelectric devices. In photovoltaic devices, semiconductor NCs can act as efficient light harvesters for high-performance solar cells. Besides light absorption, NCs have shown great significance as functional layers for charge (hole and electron) transport and interface modification to improve the power conversion efficiency and stability of solar cells. NC-based functional layers can boost hole/electron transport ability, adjust energy level alignment between a light absorbing layer and charge transport layer, broaden the absorption range of an active layer, enhance intrinsic stability, and reduce fabrication cost. In this review, recent advances in NCs as a hole transport layer, electron transport layer, and interfacial layer are discussed. Additionally, NC additives to improve the performance of solar cells are demonstrated. Finally, a summary and future prospects of NC-based functional materials in solar cells are presented, addressing their limitations and suggesting potential solutions.
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Affiliation(s)
- Boping Yang
- College of Science, Guizhou Institute of Technology Guiyang 550003 China
| | - Junjie Cang
- School of Electrical Engineering, Yancheng Institute of Technology Yancheng 224051 China
| | - Zhiling Li
- College of Science, Guizhou Institute of Technology Guiyang 550003 China
| | - Jian Chen
- College of Artificial Intelligence and Electrical Engineering, Guizhou Institute of Technology Guiyang 550003 China
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3
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Ali I, Islam MR, Yin J, Eichhorn SJ, Chen J, Karim N, Afroj S. Advances in Smart Photovoltaic Textiles. ACS NANO 2024; 18:3871-3915. [PMID: 38261716 PMCID: PMC10851667 DOI: 10.1021/acsnano.3c10033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/25/2024]
Abstract
Energy harvesting textiles have emerged as a promising solution to sustainably power wearable electronics. Textile-based solar cells (SCs) interconnected with on-body electronics have emerged to meet such needs. These technologies are lightweight, flexible, and easy to transport while leveraging the abundant natural sunlight in an eco-friendly way. In this Review, we comprehensively explore the working mechanisms, diverse types, and advanced fabrication strategies of photovoltaic textiles. Furthermore, we provide a detailed analysis of the recent progress made in various types of photovoltaic textiles, emphasizing their electrochemical performance. The focal point of this review centers on smart photovoltaic textiles for wearable electronic applications. Finally, we offer insights and perspectives on potential solutions to overcome the existing limitations of textile-based photovoltaics to promote their industrial commercialization.
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Affiliation(s)
- Iftikhar Ali
- Centre
for Print Research (CFPR), The University
of the West of England, Frenchay Campus, Bristol BS16 1QY, U.K.
| | - Md Rashedul Islam
- Centre
for Print Research (CFPR), The University
of the West of England, Frenchay Campus, Bristol BS16 1QY, U.K.
| | - Junyi Yin
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Stephen J. Eichhorn
- Bristol
Composites Institute, School of Civil, Aerospace, and Design Engineering, The University of Bristol, University Walk, Bristol BS8 1TR, U.K.
| | - Jun Chen
- Department
of Bioengineering, University of California,
Los Angeles, Los Angeles, California 90095, United States
| | - Nazmul Karim
- Centre
for Print Research (CFPR), The University
of the West of England, Frenchay Campus, Bristol BS16 1QY, U.K.
- Nottingham
School of Art and Design, Nottingham Trent
University, Shakespeare Street, Nottingham NG1 4GG, U.K.
| | - Shaila Afroj
- Centre
for Print Research (CFPR), The University
of the West of England, Frenchay Campus, Bristol BS16 1QY, U.K.
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4
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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: 0] [Impact Index Per Article: 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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5
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Taghipour N, Dalmases M, Whitworth GL, Wang Y, Konstantatos G. Ultrafast Cascade Charge Transfer in Multibandgap Colloidal Quantum Dot Solids Enables Threshold Reduction for Optical Gain and Stimulated Emission. NANO LETTERS 2023; 23:8637-8642. [PMID: 37724790 DOI: 10.1021/acs.nanolett.3c02468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Achieving low-threshold infrared stimulated emission in solution-processed quantum dots is critical to enable real-life applications including photonic integrated circuits (PICs), LIDAR application, and optical telecommunication. However, realization of low threshold infrared gain is fundamentally challenging due to high degeneracy of the first emissive state (e.g., 8-fold) and fast Auger recombination. In this Letter, we demonstrate ultra-low-threshold infrared stimulated emission with an onset of 110 μJ cm-2 employing cascade charge transfer (CT) in Pb-chalcogenide colloidal quantum dot (CQD) solids. In doing so, we investigate this idea in two different architectures including a mixture of multiband gap CQDs and a layer-by-layer (LBL) configuration. Using transient absorption spectroscopy, we show ultrafast cascade CT from large band gap PbS CQD to small band gap PbS/PbSSe core/shell CQDs in LBL (∼2 ps) and mixture (∼9 ps) configurations. These results indicate the feasibility of using cascade CT as an efficient method to reduce the optical gain threshold in CQD solid films.
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Affiliation(s)
- Nima Taghipour
- ICFO, Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860 Spain
| | - Mariona Dalmases
- ICFO, Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860 Spain
| | - Guy Luke Whitworth
- ICFO, Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860 Spain
| | - Yongjie Wang
- ICFO, Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860 Spain
| | - Gerasimos Konstantatos
- ICFO, Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, 08860 Spain
- ICREA, Institució Catalana de Recerca i Estudis Avançats, Barcelona, 08010 Spain
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6
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Babaev AA, Skurlov ID, Timkina YA, Fedorov AV. Colloidal 2D Lead Chalcogenide Nanocrystals: Synthetic Strategies, Optical Properties, and Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111797. [PMID: 37299700 DOI: 10.3390/nano13111797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Lead chalcogenide nanocrystals (NCs) are an emerging class of photoactive materials that have become a versatile tool for fabricating new generation photonics devices operating in the near-IR spectral range. NCs are presented in a wide variety of forms and sizes, each of which has its own unique features. Here, we discuss colloidal lead chalcogenide NCs in which one dimension is much smaller than the others, i.e., two-dimensional (2D) NCs. The purpose of this review is to present a complete picture of today's progress on such materials. The topic is quite complicated, as a variety of synthetic approaches result in NCs with different thicknesses and lateral sizes, which dramatically change the NCs photophysical properties. The recent advances highlighted in this review demonstrate lead chalcogenide 2D NCs as promising materials for breakthrough developments. We summarized and organized the known data, including theoretical works, to highlight the most important 2D NC features and give the basis for their interpretation.
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Affiliation(s)
- Anton A Babaev
- PhysNano Department, ITMO University, Saint Petersburg 197101, Russia
| | - Ivan D Skurlov
- PhysNano Department, ITMO University, Saint Petersburg 197101, Russia
| | - Yulia A Timkina
- PhysNano Department, ITMO University, Saint Petersburg 197101, Russia
| | - Anatoly V Fedorov
- PhysNano Department, ITMO University, Saint Petersburg 197101, Russia
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7
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Hamadani BH. 2.11 - Accurate characterization of indoor photovoltaic performance. JPHYS MATERIALS 2023; 6:10.1088/2515-7639/acc550. [PMID: 37965623 PMCID: PMC10644663 DOI: 10.1088/2515-7639/acc550] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Abstract
Ambient energy harvesting has great potential to contribute to sustainable development and address growing environmental challenges. Converting waste energy from energy-intensive processes and systems (e.g. combustion engines and furnaces) is crucial to reducing their environmental impact and achieving net-zero emissions. Compact energy harvesters will also be key to powering the exponentially growing smart devices ecosystem that is part of the Internet of Things, thus enabling futuristic applications that can improve our quality of life (e.g. smart homes, smart cities, smart manufacturing, and smart healthcare). To achieve these goals, innovative materials are needed to efficiently convert ambient energy into electricity through various physical mechanisms, such as the photovoltaic effect, thermoelectricity, piezoelectricity, triboelectricity, and radiofrequency wireless power transfer. By bringing together the perspectives of experts in various types of energy harvesting materials, this Roadmap provides extensive insights into recent advances and present challenges in the field. Additionally, the Roadmap analyses the key performance metrics of these technologies in relation to their ultimate energy conversion limits. Building on these insights, the Roadmap outlines promising directions for future research to fully harness the potential of energy harvesting materials for green energy anytime, anywhere.
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8
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Al-Ahmed A, Afzaal M, Mahar N, Khan F, Pandey S, Zahir MH, Al-Suliman FA. The Synergy of Lead Chalcogenide Nanocrystals in Polymeric Bulk Heterojunction Solar Cells. ACS OMEGA 2022; 7:45981-45990. [PMID: 36570221 PMCID: PMC9773793 DOI: 10.1021/acsomega.2c06759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 11/21/2022] [Indexed: 06/12/2023]
Abstract
Photoactive polymer and quantum dots (QDs)/nanocrystals (NCs)-based bulk heterojunction (BHJ) solar cells have the combined positivity of organic semiconductors and inorganic components, which can enable a high carrier mobility and absorption coefficient. Additionally, the NCs also provide the opportunity to tune the band gap to obtain enhanced absorption in a broad solar spectrum. Among the semiconductors, lead chalcogenide NCs are of particular interest due to their good photosensitivity in the near-infrared (NIR) region of the solar spectrum. These NCs have large exciton Bohr radii (18, 46, and 150 nm for PbS, PbSe, and PbTe, respectively) and tunable sizes depending on the optical bandgaps between 0.3 and 1.5 eV. Independently, lead chalcogenide NCs have been studied extensively for different applications; however, uses in polymer-NC-based bulk heterojunction solar cells are limited. This Review has been structured on the lead chalcogenide NCs incorporated in polymer composite-based bulk heterojunction solar cells covering the material, properties, and solar cell performance to find the issues and explore future opportunities.
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Affiliation(s)
- Amir Al-Ahmed
- Interdisciplinary
Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum and & Minerals
(KFUPM), Dhahran 31261, Saudi Arabia
| | - Mohammad Afzaal
- Maths
and Natural Sciences Division, Higher Colleges
of Technology, P.O. Box 7947, Sharjah, United
Arab Emirates
| | - Nasurullah Mahar
- Department
of Chemistry, King Fahd University of Petroleum
and Minerals (KFUPM), Dhahran 31261, Saudi Arabia
| | - Firoz Khan
- Interdisciplinary
Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum and & Minerals
(KFUPM), Dhahran 31261, Saudi Arabia
| | - Sadanand Pandey
- Department
of Chemistry, College of Natural Science, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Md. Hasan Zahir
- Interdisciplinary
Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum and & Minerals
(KFUPM), Dhahran 31261, Saudi Arabia
| | - Fahad A. Al-Suliman
- Interdisciplinary
Research Center for Renewable Energy and Power Systems (IRC-REPS), King Fahd University of Petroleum and & Minerals
(KFUPM), Dhahran 31261, Saudi Arabia
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9
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Aryal S, Frimpong J, Liu ZF. Comparative Study of Covalent and van der Waals CdS Quantum Dot Assemblies from Many-Body Perturbation Theory. J Phys Chem Lett 2022; 13:10153-10161. [PMID: 36278936 DOI: 10.1021/acs.jpclett.2c02856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Quantum dot (QD) assemblies are nanostructured networks made from aggregates of QDs and feature improved charge and energy transfer efficiencies compared to discrete QDs. Using first-principles many-body perturbation theory, we systematically compare the electronic and optical properties of two types of CdS QD assemblies that have been experimentally investigated: (i) QD gels, where individual QDs are covalently connected via di- or polysulfide bonds, and (ii) QD nanocrystals, where individual QDs are bound via van der Waals interactions. Our work illustrates how the electronic and optical properties evolve when discrete QDs are assembled into 1D, 2D, and 3D gels and nanocrystals, as well as how the one-body and many-body interactions in these systems impact the trends as the dimensionality of the assembly increases. Furthermore, our work reveals the crucial role of the di- or polysulfide covalent bonds in the localization of the excitons, which highlights the difference between QD gels and QD nanocrystals.
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Affiliation(s)
- Sandip Aryal
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Joseph Frimpong
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Zhen-Fei Liu
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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10
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Oseni SO, Osifeko OL, Boyo AO, Mola GT. Tri‐metallic quantum dot under the influence of solvent additive for improved performance of polymer solar cells. J Appl Polym Sci 2022. [DOI: 10.1002/app.53293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Saheed O. Oseni
- Department of Physics Lagos State University Lagos Nigeria
- School of Chemistry & Physics University of KwaZulu‐Natal Scottsville South Africa
| | | | | | - Genene Tessema Mola
- School of Chemistry & Physics University of KwaZulu‐Natal Scottsville South Africa
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11
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Fatemi A, Tohidi T, Jamshidi-Galeh K, Rasouli M, Ostrikov K. Optical and structural properties of Sn and Ag-doped PbS/PVA nanocomposites synthesized by chemical bath deposition. Sci Rep 2022; 12:12893. [PMID: 35902699 PMCID: PMC9334611 DOI: 10.1038/s41598-022-16666-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/13/2022] [Indexed: 11/09/2022] Open
Abstract
In this work, Sn and Ag doped PbS/PVA nanocomposites, in three different concentrations were successfully prepared using the low-cost and simple method of chemical bath deposition (CBD). X-ray diffraction patterns confirmed the formation of the PbS cubic phase in all of the nanocomposites. FE-SEM images showed that PbS NPs are cubic in shape and the doping can alter the shape of grains. DLS analysis applied for solution NPs exhibited a 175 nm size distribution for PbS NPs and decreased by doping Ag and Sn to almost 100 nm and 110 nm, respectively. Optical absorption spectra showed the blue phenomena and the band gaps of Sn: PbS/PVA and Ag: PbS/PVA nanocomposites increased with adding Sn and Ag from 3.08 eV for pure PVA/PbS to 3.33 eV for Sn doped and 3.43 eV for Ag-doped samples. The nonlinear refractive index is decreased from 0.55 m2 W-1 for pure PVA/PbS to 0.11 m2 W-1 and 0.13 m2 W-1 for Sn and Ag-doped samples, respectively. Hence, doping Ag and Sn enhanced the optical sensitivity issue of nanocomposites and raised the optical resistivity. Collectively, our results can be useful in the design of linear and nonlinear optical devices such as sensors and optical switches and limiters.
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Affiliation(s)
- Ali Fatemi
- Department of Physics, Azarbaijan Shahid Madani University, Tabriz, Iran.
| | - Tavakkol Tohidi
- Northwest Research Complex (Bonab), Radiation Applications Research School, Nuclear Science and Technology Research Institute (NSTRI), Tehran, Iran.
| | | | - Milad Rasouli
- Department of Physics, Kharazmi University, Tehran, Iran.
- Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Kostya Ostrikov
- School of Chemistry and Physics and QUT Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, Australia
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12
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Li Z, Robinson ZL, Elvati P, Violi A, Kortshagen UR. Distance-dependent resonance energy transfer in alkyl-terminated Si nanocrystal solids. J Chem Phys 2022; 156:124705. [PMID: 35364875 PMCID: PMC8975605 DOI: 10.1063/5.0079571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Understanding and controlling the energy transfer between silicon nanocrystals is of significant importance for the design of efficient optoelectronic devices. However, previous studies on silicon nanocrystal energy transfer were limited because of the strict requirements to precisely control the inter-dot distance and to perform all measurements in air-free environments to preclude the effect of ambient oxygen. Here, we systematically investigate the distance-dependent resonance energy transfer in alkyl-terminated silicon nanocrystals for the first time. Silicon nanocrystal solids with inter-dot distances varying from 3 to 5 nm are fabricated by varying the length and surface coverage of alkyl ligands in solution-phase and gas-phase functionalized silicon nanocrystals. The inter-dot energy transfer rates are extracted from steady-state and time-resolved photoluminescence measurements, enabling a direct comparison to theoretical predictions. Our results reveal that the distance-dependent energy transfer rates in Si NCs decay faster than predicted by the Förster mechanism, suggesting higher-order multipole interactions.
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Affiliation(s)
- Zhaohan Li
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Zachary L Robinson
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Paolo Elvati
- Department of Mechanical Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, Michigan 48109-2125, USA
| | - Angela Violi
- Department of Mechanical Engineering, University of Michigan, 2350 Hayward St., Ann Arbor, Michigan 48109-2125, USA
| | - Uwe R Kortshagen
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
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13
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Rodosthenous P, Skibinsky-Gitlin ES, Rodriguez-Bolivar S, Califano M, Gomez-Campos FM. Band-like transport in 'green' quantum dot films: the effect of composition and stoichiometry. J Chem Phys 2022; 156:104704. [DOI: 10.1063/5.0078375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Yang J, Yoo J, Yu WS, Choi MK. Polymer-Assisted High-Resolution Printing Techniques for Colloidal Quantum Dots. Macromol Res 2021. [DOI: 10.1007/s13233-021-9055-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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15
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Kim T, Park S, Jeong S. Diffusion dynamics controlled colloidal synthesis of highly monodisperse InAs nanocrystals. Nat Commun 2021; 12:3013. [PMID: 34021149 PMCID: PMC8140152 DOI: 10.1038/s41467-021-23259-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 04/07/2021] [Indexed: 11/08/2022] Open
Abstract
Highly monodisperse colloidal InAs quantum dots (QDs) with superior optoelectronic properties are promising candidates for various applications, including infrared photodetectors and photovoltaics. Recently, a synthetic process involving continuous injection has been introduced to synthesize uniformly sized InAs QDs. Still, synthetic efforts to increase the particle size of over 5 nm often suffer from growth suppression. Secondary nucleation or interparticle ripening during the growth accompanies the inhomogeneity in size as well. In this study, we propose a growth model for the continuous synthetic processing of colloidal InAs QDs based on molecular diffusion. The experimentally validated model demonstrates how precursor solution injection reduces monomer flux, limiting particle growth during synthesis. As predicted by our model, we control the diffusion dynamics by tuning reaction volume, precursor concentration, and injection rate of precursor. Through diffusion-dynamics-control in the continuous process, we synthesize the InAs QDs with a size over 9.0-nm (1Smax of 1600 nm) with a narrow size distribution (12.2%). Diffusion-dynamics-controlled synthesis presented in this study effectively manages the monomer flux and thus overcome monomer-reactivity-originating size limit of nanocrystal growth in solution.
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Affiliation(s)
- Taewan 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
| | - Sohee Jeong
- Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon, Gyeonggi-do, South Korea.
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