1
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Kalita S, Das DK. Fluorescent and Electrochemical Sensor Based on Basic Red 9 Dye Functionalised Graphene Oxide-Montmorillonite Composite for Selective Detection of Cerium (III) Ion. J Fluoresc 2023:10.1007/s10895-023-03570-z. [PMID: 38157086 DOI: 10.1007/s10895-023-03570-z] [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: 11/20/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
In this work, graphene oxide (GO) has been prepared from used dry cells using modified Hummer's method and encapsulated with montmorillonite clay. To enhance its electrical property, the GO-MMT composite has been functionalised with Basic Red 9 dye. The sensor was characterized by various spectroscopic techniques like FT-IR spectroscopy, PXRD, SEM analysis, etc. Basic Red 9 dye functionalised GO-MMT composite has been employed for fluorescent and electrochemical detection of Ce3+ ion. The fluorescent turn-on sensing is sensitive, reversible and free from interference from other metal ions. The detection of Ce3+ ion by the sensor was also conducted in bovine serum albumin (BSA) medium. Pt electrode modified with the hybrid sensor produces excellent electrochemical change in presence of Ce3+ ion through cyclic voltammetry and square wave voltammetry technique. The limit of detection (LOD) from fluorescence spectroscopy, cyclic voltammetry and square wave voltammetry were calculated to be 0.6556 × 10- 9 M, 1.232 × 10- 9 M and 1.923 × 10- 9 M respectively.
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Affiliation(s)
- Sarojmoni Kalita
- Department of Chemistry, Gauhati University, Guwahati, Assam, 781014, India.
| | - Diganta Kumar Das
- Department of Chemistry, Gauhati University, Guwahati, Assam, 781014, India
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2
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DuBose JT, Kamat PV. How Pendant Groups Dictate Energy and Electron Transfer in Perovskite-Rhodamine Light Harvesting Assemblies. J Am Chem Soc 2023; 145:4601-4612. [PMID: 36795798 DOI: 10.1021/jacs.2c12248] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Energy and electron transfer processes allow for efficient manipulation of excited states within light harvesting assemblies for photocatalytic and optoelectronic applications. We have now successfully probed the influence of acceptor pendant group functionalization on the energy and electron transfer between CsPbBr3 perovskite nanocrystals and three rhodamine-based acceptor molecules. The three acceptors─rhodamine B (RhB), rhodamine isothiocyanate (RhB-NCS), and rose Bengal (RoseB)─contain an increasing degree of pendant group functionalization that affects their native excited state properties. When interacting with CsPbBr3 as an energy donor, photoluminescence excitation spectroscopy reveals that singlet energy transfer occurs with all three acceptors. However, the acceptor functionalization directly influences several key parameters that dictate the excited state interactions. For example, RoseB binds to the nanocrystal surface with an apparent association constant (Kapp = 9.4 × 106 M-1) 200 times greater than RhB (Kapp = 0.05 × 106 M-1), thus influencing the rate of energy transfer. Femtosecond transient absorption reveals the observed rate constant of singlet energy transfer (kEnT) is an order-of-magnitude greater for RoseB (kEnT = 1 × 1011 s-1) than for RhB and RhB-NCS. In addition to energy transfer, each acceptor had a subpopulation of molecules (∼30%) that underwent electron transfer as a competing pathway. Thus, the structural influence of acceptor moieties must be considered for both excited state energy and electron transfer in nanocrystal-molecular hybrids. The competition between electron and energy transfer further highlights the complexity of excited state interactions in nanocrystal-molecular complexes and the need for careful spectroscopic analysis to elucidate competitive pathways.
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Affiliation(s)
- Jeffrey T DuBose
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Prashant V Kamat
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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3
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Chakkamalayath J, Szabó G, DuBose JT, Kamat PV. Excited State and Transient Chemistry of a Perylene Derivative (DBP). An Untold Story. J Phys Chem A 2023; 127:99-106. [PMID: 36375093 DOI: 10.1021/acs.jpca.2c06904] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transient chemistry of sensitizing dyes is important to obtain insights into the photochemical conversion processes of light harvesting assemblies. We have now employed transient absorption spectroscopy (pulsed laser and pulse radiolysis) to characterize the excited state and radical intermediates of a perylene derivative, (5,10,15,20-Tetraphenylbisbenz[5,6]indeno[1,2,3-cd:1',2',3'-lm]perylene (DBP). The distinguishable transient absorption features for the singlet and triplet excited states and radical anion and radical cation provide spectral fingerprints to identify the reaction intermediates in photochemical energy and electron transfer processes of composite systems involving DBP. For example, identifying these transients in the energy transfer processes of the rubrene-DBP system would aid in establishing their role as annihilator-emitter for triplet-triplet annihilation up-conversion (TTA-UC). The transient characterization thus serves as an important mechanistic fingerprint for elucidating mechanistic details of systems employing DBP in optoelectronic applications.
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4
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Sanglee K, Nukunudompanich M, Part F, Zafiu C, Bello G, Ehmoser EK, Chuangchote S. The current state of the art in internal additive materials and quantum dots for improving efficiency and stability against humidity in perovskite solar cells. Heliyon 2022; 8:e11878. [PMID: 36590569 PMCID: PMC9801089 DOI: 10.1016/j.heliyon.2022.e11878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 09/30/2022] [Accepted: 11/17/2022] [Indexed: 11/30/2022] Open
Abstract
The remarkable optoelectronic capabilities of perovskite structures enable the achievement of astonishingly high-power conversion efficiencies on the laboratory scale. However, a critical bottleneck of perovskite solar cells is their sensitivity to the surrounding humid environment affecting drastically their long-term stability. Internal additive materials together with surface passivation, polymer-mixed perovskite, and quantum dots, have been investigated as possible strategies to enhance device stability even in unfavorable conditions. Quantum dots (QDs) in perovskite solar cells enable power conversion efficiencies to approach 20%, making such solar cells competitive to silicon-based ones. This mini-review summarized the role of such QDs in the perovskite layer, hole-transporting layer (HTL), and electron-transporting layer (ETL), demonstrating the continuous improvement of device efficiencies.
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Affiliation(s)
- Kanyanee Sanglee
- Solar Photovoltaic Research Team, National Energy Technology Center, National Science and Technology Development Agency, 114 Thailand Science Park, Phaholyothin Road, Klong Nueng, Klong Luang, Pathum Thani 12120, Thailand
| | - Methawee Nukunudompanich
- Department of Industrial Engineering, King Mongkut's Institute of Technology Ladkrabang (KMITL), 1 Chalong Krung 1 Alley, Lat Krabang, Bangkok 10520, Thailand
| | - Florian Part
- Department of Water-Atmosphere-Environment, Institute of Waste Management and Circularity, University of Natural Resources and Life Sciences, Muthgasse 107, 1190 Vienna, Austria
| | - Christian Zafiu
- Department of Water-Atmosphere-Environment, Institute of Waste Management and Circularity, University of Natural Resources and Life Sciences, Muthgasse 107, 1190 Vienna, Austria
| | - Gianluca Bello
- Division of Pharmaceutical Technology and Biopharmaceutics, Department of Pharmaceutical Science, University of Vienna, Josef-Holaubek-Platz 2 UZA2, 1090 Vienna, Austria
| | - Eva-Kathrin Ehmoser
- Department of Nanobiotechnology, Institute for Synthetic Bioarchitectures, University of Natural Resources and Life Sciences, Muthgasse 11/II, 1190 Vienna, Austria
| | - Surawut Chuangchote
- Department of Tool and Materials Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi (KMUTT), 126 Prachauthit Rd., Bangmod, Tungkru, Bangkok 10140, Thailand
- Research Center of Advanced Materials for Energy and Environmental Technology (MEET), King Mongkut’s University of Technology Thonburi (KMUTT), 126 Prachauthit Rd., Bangmod, Tungkru, Bangkok 10140, Thailand
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5
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Heidari M, Loague Q, Bangle RE, Galoppini E, Meyer GJ. Reorganization Energies for Interfacial Electron Transfer across Phenylene Ethynylene Rigid-Rod Bridges. ACS APPLIED MATERIALS & INTERFACES 2022; 14:35205-35214. [PMID: 35862637 DOI: 10.1021/acsami.2c07151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A family of three ruthenium bipyridyl rigid-rod compounds of the general form [Ru(bpy)2(LL)](PF6)2 were anchored to mesoporous thin films of tin-doped indium oxide (ITO) nanocrystals. Here, LL is a 4-substituted 2,2-bipyridine (bpy) ligand with varying numbers of conjugated phenylenethynylene bridge units between the bipyridine ring and anchoring group consisting of a bis-carboxylated isophthalic group. The visible absorption spectra and the formal potentials, Eo(RuIII/II), of the surface anchored rigid-rods were insensitive to the presence of the phenylene ethynylene bridge units in 0.1 M tetrabutyl ammonium perchlorate acetonitrile solutions (TBAClO4/CH3CN). The conductive nature of the ITO enabled potentiostatic control of the Fermi level and hence a means to tune the Gibbs free energy change, -ΔG°, for electron transfer from the ITO to the rigid-rods. Pseudo-rate constants for this electron transfer reaction increased as the number of bridge units decreased at a fixed -ΔG°. With the assumption that the reorganization energy, λ, and the electronic coupling matrix element, Hab, were independent of the applied potential, rate constants measured as a function of -ΔG° and analyzed through Marcus-Gerischer theory provided estimates of Hab and λ. In rough accordance with the dielectric continuum theory, λ was found to increase from 0.61 to 0.80 eV as the number of bridge units was increased. In contrast, Hab decreased markedly with distance from 0.54 to 0.11 cm-1, consistent with non-adiabatic electron transfer. Comparative analysis with previously published studies of bridges with an sp3-hybridized carbon indicated that the phenylene ethynylene bridge does not enhance electronic coupling between the oxide and the rigid-rod acceptor. The implications of these findings for practical applications in solar energy conversion are specifically discussed.
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Affiliation(s)
- Marzieh Heidari
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Quentin Loague
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Rachel E Bangle
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Elena Galoppini
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Gerald J Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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6
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DuBose JT, Kamat PV. Energy Versus Electron Transfer: Managing Excited-State Interactions in Perovskite Nanocrystal-Molecular Hybrids. Chem Rev 2022; 122:12475-12494. [PMID: 35793168 DOI: 10.1021/acs.chemrev.2c00172] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Energy and electron transfer processes in light harvesting assemblies dictate the outcome of the overall light energy conversion process. Halide perovskite nanocrystals such as CsPbBr3 with relatively high emission yield and strong light absorption can transfer singlet and triplet energy to surface-bound acceptor molecules. They can also induce photocatalytic reduction and oxidation by selectively transferring electrons and holes across the nanocrystal interface. This perspective discusses key factors dictating these excited-state pathways in perovskite nanocrystals and the fundamental differences between energy and electron transfer processes. Spectroscopic methods to decipher between these complex photoinduced pathways are presented. A basic understanding of the fundamental differences between the two excited deactivation processes (charge and energy transfer) and ways to modulate them should enable design of more efficient light harvesting assemblies with semiconductor and molecular systems.
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Affiliation(s)
- Jeffrey T DuBose
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Prashant V Kamat
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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7
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Wang L, Zhang B, Yang G, Li W, Wang J, Zhang X, Liang G. Spectral analysis on the acceptor concentration-dependent fluorescence resonance energy transfer process in CuInS 2@ZnS-SQ complexes. OPTICS EXPRESS 2022; 30:23695-23703. [PMID: 36225044 DOI: 10.1364/oe.460333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/03/2022] [Indexed: 06/16/2023]
Abstract
Owing to the broad spectral response and flexible choices of donors and acceptors, fluorescence resonance energy transfer (FRET) system based on quantum dots (QDs) is a potential candidate for enhancing performance of solar cells and other optoelectronic devices. Thus it is necessary to develop such FRET systems with high efficiency and understand the involved photophysical dynamics. Here, with type I CuInS2@ZnS core-shell quantum dots as the energy donor, series of CuInS2@ZnS-SQ complexes are synthesized by adjusting the acceptor (squaric acid, SQ) concentration. The FRET dynamics of the samples is systematically investigated by virtue of steady-state emission, time-resolved fluorescence decay, and transient absorption measurements. The experimental results display a positive correlation between the energy transfer efficient (η). The best energy transfer efficient achieved from experimental data is 52%. This work provides better understanding of the photophysical dynamics in similar complexes and facilitates further development of new photoelectronic devices based on relevant FRET systems.
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8
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Kathiravan A. Investigation of photophysical insights into the CsPbBr3-porphyrazine system in solution. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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9
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DuBose JT, Kamat PV. Directing Energy Transfer in Halide Perovskite-Chromophore Hybrid Assemblies. J Am Chem Soc 2021; 143:19214-19223. [PMID: 34726894 DOI: 10.1021/jacs.1c09867] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Directing the flow of energy and the nature of the excited states that are produced in nanocrystal-chromophore hybrid assemblies is crucial for realizing their photocatalytic and optoelectronic applications. Using a combination of steady-state and time-resolved absorption and photoluminescence (PL) experiments, we have probed the excited-state interactions in the CsPbBr3-Rhodamine B (RhB) hybrid assembly. PL studies reveal quenching of the CsPbBr3 emission with a concomitant enhancement of the fluorescence of RhB, indicating a singlet-energy-transfer mechanism. Transient absorption spectroscopy shows that this energy transfer occurs on the ∼200 ps time scale. To understand whether the energy transfer occurs through a Förster or Dexter mechanism, we leveraged facile halide-exchange reactions to tune the optical properties of the donor CsPbBr3 by alloying with chloride. This allowed us to tune the spectral overlap between the donor CsPb(Br1-xClx)3 emission and acceptor RhB absorption. For CsPbBr3-RhB, the rate constant for energy transfer (kET) agrees well with Förster theory, whereas alloying with chloride to produce chloride-rich CsPb(Br1-xClx)3 favors a Dexter mechanism. These results highlight the importance of optimizing both the donor and acceptor properties to design light-harvesting assemblies that employ energy transfer. The ease of tuning optical properties through halide exchange of the nanocrystal donor provides a unique platform for studying and tailoring excited-state interactions in perovskite-chromophore assemblies.
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Affiliation(s)
- Jeffrey T DuBose
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Prashant V Kamat
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.,Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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10
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Effect of linkers with different chemical structures on photovoltaic performance of CdSe quantum dot-sensitized solar cells. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137452] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Ray A, Bhattacharya S. Study of alloyed quantum dots-porphyrazine interaction in solution. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Lu H, Chen X, Anthony JE, Johnson JC, Beard MC. Sensitizing Singlet Fission with Perovskite Nanocrystals. J Am Chem Soc 2019; 141:4919-4927. [DOI: 10.1021/jacs.8b13562] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Haipeng Lu
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Xihan Chen
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - John E. Anthony
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Justin C. Johnson
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Matthew C. Beard
- Chemistry & Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
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13
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Maiti S, Dana J, Ghosh HN. Correlating Charge‐Carrier Dynamics with Efficiency in Quantum‐Dot Solar Cells: Can Excitonics Lead to Highly Efficient Devices? Chemistry 2018; 25:692-702. [DOI: 10.1002/chem.201801853] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 07/06/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Sourav Maiti
- Radiation & Photochemistry DivisionBhabha Atomic Research Centre Mumbai 400085 India
- Department of ChemistrySavitribai Phule Pune University Ganeshkhind Pune 411007 India
| | - Jayanta Dana
- Radiation & Photochemistry DivisionBhabha Atomic Research Centre Mumbai 400085 India
| | - Hirendra N. Ghosh
- Radiation & Photochemistry DivisionBhabha Atomic Research Centre Mumbai 400085 India
- Institute of Nano Science and Technology Mohali Punjab 160062 India
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14
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Sakai H, Inaya R, Tkachenko NV, Hasobe T. High‐Yield Generation of Triplet Excited States by an Efficient Sequential Photoinduced Process from Energy Transfer to Singlet Fission in Pentacene‐Modified CdSe/ZnS Quantum Dots. Chemistry 2018; 24:17062-17071. [DOI: 10.1002/chem.201803257] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Hayato Sakai
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, 223-8522, Japan
| | - Ryutaro Inaya
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, 223-8522, Japan
| | - Nikolai V Tkachenko
- Laboratory of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, 33101, Tampere, Finland
| | - Taku Hasobe
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Kanagawa, 223-8522, Japan
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15
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16
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Study of chemical physics on energy transfer phenomenon between quantum dots and a designed diporphyrin in solution. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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18
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Ray A, De A, Bhattacharya S. Study of energy transfer phenomenon between quantum dots and zinc porphyrin in solution. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.090] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Wang C, Weiss EA. Accelerating FRET between Near-Infrared Emitting Quantum Dots Using a Molecular J-Aggregate as an Exciton Bridge. NANO LETTERS 2017; 17:5666-5671. [PMID: 28786684 DOI: 10.1021/acs.nanolett.7b02559] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fast energy transfer (EnT) among quantum dots (QDs) with near-infrared (NIR) emission is essential for fully exploiting their light harvesting and photon downconversion (multiexciton generation) abilities. This paper demonstrates a relayed EnT mechanism that accelerates the migration of NIR excitons between PbS QDs by a factor of 20 from that of one-step EnT through a polyelectrolyte and even a factor of ∼2 from that of one-step EnT between QDs in direct contact, by employing a J-aggregate (J-agg) of a cyanine dye as an exciton bridge. The donor QDs, acceptor QDs, and J-agg are electrostatically assembled into a sandwich structure with layer-by-layer deposition. Estimates of EnT rate and yield from transient and steady-state absorption and photoluminescence spectroscopies show that the rate-limiting step in the relay is EnT from the donor QD to the J-agg, while EnT from the J-agg to the acceptor QD occurs in <10 ps. A comparison of this system to the analogous solution-phase system suggests that the overall donor-to-acceptor EnT yield in the relay (18%) can be improved by depositing the J-agg with more intermolecular order. This work demonstrates the viability of relayed EnT through a molecular bridge as a strategy for accelerating long-distance exciton migration in assemblies of QDs, in particular in the near-infrared.
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Affiliation(s)
- Chen Wang
- Department of Chemistry, Northwestern University , 2145 Sheridan Rd., Evanston, Illinois 60208-3113, United States
| | - Emily A Weiss
- Department of Chemistry, Northwestern University , 2145 Sheridan Rd., Evanston, Illinois 60208-3113, United States
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20
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Patwari J, Sardar S, Liu B, Lemmens P, Pal SK. Three-in-one approach towards efficient organic dye-sensitized solar cells: aggregation suppression, panchromatic absorption and resonance energy transfer. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:1705-1713. [PMID: 28875108 PMCID: PMC5564262 DOI: 10.3762/bjnano.8.171] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/03/2017] [Indexed: 06/01/2023]
Abstract
In the present study, protoporphyrin IX (PPIX) and squarine (SQ2) have been used in a co-sensitized dye-sensitized solar cell (DSSC) to apply their high absorption coefficients in the visible and NIR region of the solar spectrum and to probe the possibility of Förster resonance energy transfer (FRET) between the two dyes. FRET from the donor PPIX to acceptor SQ2 was observed from detailed investigation of the excited-state photophysics of the dye mixture, using time-resolved fluorescence decay measurements. The electron transfer time scales from the dyes to TiO2 have also been characterized for each dye. The current-voltage (I-V) characteristics and the wavelength-dependent photocurrent measurements of the co-sensitized DSSCs reveal that FRET between the two dyes increase the photocurrent as well as the efficiency of the device. From the absorption spectra of the co-sensitized photoanodes, PPIX was observed to be efficiently acting as a co-adsorbent and to reduce the dye aggregation problem of SQ2. It has further been proven by a comparison of the device performance with a chenodeoxycholic acid (CDCA) added to a SQ2-sensitized DSSC. Apart from increasing the absorption window, the FRET-induced enhanced photocurrent and the anti-aggregating behavior of PPIX towards SQ2 are crucial points that improve the performance of the co-sensitized DSSC.
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Affiliation(s)
- Jayita Patwari
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Samim Sardar
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Bo Liu
- Institute for Condensed Matter Physics, TU Braunschweig, Mendelssohnstraße 3, 38106 Braunschweig, Germany
| | - Peter Lemmens
- Institute for Condensed Matter Physics, TU Braunschweig, Mendelssohnstraße 3, 38106 Braunschweig, Germany
- Laboratory for Emerging Nanometrology, TU Braunschweig, Braunschweig, Germany
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
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21
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Devatha G, Roy S, Rao A, Mallick A, Basu S, Pillai PP. Electrostatically driven resonance energy transfer in "cationic" biocompatible indium phosphide quantum dots. Chem Sci 2017; 8:3879-3884. [PMID: 28626557 PMCID: PMC5465571 DOI: 10.1039/c7sc00592j] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/12/2017] [Indexed: 01/19/2023] Open
Abstract
Indium Phosphide Quantum Dots (InP QDs) have emerged as an alternative to toxic metal ion based QDs in nanobiotechnology. The ability to generate cationic surface charge, without compromising stability and biocompatibility, is essential in realizing the full potential of InP QDs in biological applications. We have addressed this challenge by developing a place exchange protocol for the preparation of cationic InP/ZnS QDs. The quaternary ammonium group provides the much required permanent positive charge and stability to InP/ZnS QDs in biofluids. The two important properties of QDs, namely bioimaging and light induced resonance energy transfer, are successfully demonstrated in cationic InP/ZnS QDs. The low cytotoxicity and stable photoluminescence of cationic InP/ZnS QDs inside cells make them ideal candidates as optical probes for cellular imaging. An efficient resonance energy transfer (E ∼ 60%) is observed, under physiological conditions, between the cationic InP/ZnS QD donor and anionic dye acceptor. A large bimolecular quenching constant along with a linear Stern-Volmer plot confirms the formation of a strong ground state complex between the cationic InP/ZnS QDs and the anionic dye. Control experiments prove the role of electrostatic attraction in driving the light induced interactions, which can rightfully form the basis for future nano-bio studies between cationic InP/ZnS QDs and anionic biomolecules.
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Affiliation(s)
- Gayathri Devatha
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Soumendu Roy
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Anish Rao
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Abhik Mallick
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Sudipta Basu
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
| | - Pramod P Pillai
- Department of Chemistry and Centre for Energy Science , Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road , Pune 411008 , India .
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22
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Qiu Q, Xu L, Wang D, Lin Y, Xie T. Study on dynamic properties of the photoexcited charge carriers at anatase TiO 2 nanowires/fluorine doped tin oxide interface. J Colloid Interface Sci 2017; 501:273-281. [PMID: 28460220 DOI: 10.1016/j.jcis.2017.04.075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 04/18/2017] [Accepted: 04/24/2017] [Indexed: 11/30/2022]
Abstract
The photoexcited electrons transfer dynamics at the TiO2 film/fluorine doped tin oxide (FTO) interface of anatase TiO2 nanowire arrays (NWAs) and QD-sensitized TiO2 NWAs films have been studied by using surface photovoltage (SPV) and transient photovoltage (TPV) techniques. Various SPV and TPV responses were obtained when the laser beam was incident from the front side illumination and back side illumination. Based on the work function values of anatase TiO2 NWAs and FTO, the results indicate that diffusion is the major way for the separation and transfer of the photoexcited charge in the both anatase TiO2 NWAs and QD-sensitized TiO2 NWAs films under front side illumination. And the photoexcited charge were separated by drift under the built-in electric field at the TiO2 film/FTO interface for anatase TiO2 NWAs and QD-sensitized TiO2 NWAs films under back side illumination. In addition, under back side illumination the built-in electric field and band structure of CdS/CdSe QDs and anatase TiO2 NWAs lead to the separation and transfer of the photoexcited charge for CdS/CdSe QDs sensitized TiO2 NWAs/FTO film. As the intensity of illumination increases, the effect of built-in electric field on the separation and transfer of the photoexcited charge in the QD-sensitized TiO2 NWAs film decreases.
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Affiliation(s)
- Qingqing Qiu
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Lingling Xu
- Key Laboratory of Photonic and Electric Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China
| | - Dejun Wang
- College of Chemistry, Jilin University, Changchun 130012, PR China; Department of Chemistry, Tsinghua University, Beijing 100084, PR China
| | - Yanhong Lin
- College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Tengfeng Xie
- College of Chemistry, Jilin University, Changchun 130012, PR China.
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23
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Kamat PV. Semiconductor Surface Chemistry as Holy Grail in Photocatalysis and Photovoltaics. Acc Chem Res 2017; 50:527-531. [PMID: 28945391 DOI: 10.1021/acs.accounts.6b00528] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The trail of semiconductor surface photochemistry during the past four decades has led to the emergence of new areas in chemistry (e.g., photocatalysis, solar cells, solar fuels). How can one now exploit the richness of surface chemistry of hybrid architectures and make a transformative leap in light energy conversion and other applications?
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Affiliation(s)
- Prashant V. Kamat
- Radiation Laboratory, Department
of Chemistry and Biochemistry University of Notre Dame, Notre Dame, Indiana 46556, United States
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24
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Saccone D, Galliano S, Barbero N, Quagliotto P, Viscardi G, Barolo C. Polymethine Dyes in Hybrid Photovoltaics: Structure-Properties Relationships. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501598] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Martín C, Ziółek M, Douhal A. Ultrafast and fast charge separation processes in real dye-sensitized solar cells. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2015.12.001] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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26
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Wang M, Han Q, Zhou Y, Li P, Tu W, Tang L, Zou Z. TiO2 nanosheet-anchoring Au nanoplates: high-energy facet and wide spectra surface plasmon-promoting photocatalytic efficiency and selectivity for CO2 reduction. RSC Adv 2016. [DOI: 10.1039/c6ra14821b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An Au–TiO2 nanocomposite consisting of (001) exposed TiO2 nanosheet-anchored Au nanoplates was successfully fabricated and applied for the photocatalytic reduction of CO2 into hydrocarbon fuels.
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Affiliation(s)
- Meng Wang
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Modern Acoustics
| | - Qiutong Han
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Modern Acoustics
| | - Yong Zhou
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Modern Acoustics
| | - Ping Li
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Modern Acoustics
| | - Wenguang Tu
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Modern Acoustics
| | - Lanqin Tang
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Modern Acoustics
| | - Zhigang Zou
- Jiangsu Key Laboratory for Nano Technology
- Nanjing University
- Nanjing 210093
- P. R. China
- Ecomaterials and Renewable Energy Research Center (ERERC)
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27
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Abstract
Photoactive nanoparticles are smart systems that exhibit unique optical properties. In general, their intrinsic properties are size dependent. The degree and type of response to size are both related to their composition. Nanoparticles usually require to be capped with organic ligands in order to be dispersible in an aqueous or organic media, thus leading to nanoparticle colloidal dispersions and enhancing the processability of the material. The organic ligand also plays a key role in their preparation. In addition, the high surface-to-volume ratio of the nanoparticles combined with the affinity of the ligands for the nanoparticle surface can be used to place a large number of functional molecules at their periphery. The purpose of this chapter is to understand the synergism between nanoparticles and organic ligands with regard to their preparation, performance, and applicability.
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28
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Elward JM, Chakraborty A. Effect of Heterojunction on Exciton Binding Energy and Electron–Hole Recombination Probability in CdSe/ZnS Quantum Dots. J Chem Theory Comput 2015; 11:462-71. [DOI: 10.1021/ct500548x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jennifer M. Elward
- Army Research
Laboratory, Aberdeen Proving Ground, Aberdeen, Maryland 21005, United States
| | - Arindam Chakraborty
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
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29
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Yesudas K, Jemmis ED, Bhanuprakash K. Ketocyanine dyes: impact of conjugation length on optical absorption and third-order polarizabilities. Phys Chem Chem Phys 2015; 17:12988-99. [DOI: 10.1039/c5cp01410g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structure–property relationships are proposed for tuning the optical absorption of ketocyanine dyes and to obtain large negative third-order polarizabilities.
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Affiliation(s)
- Kada Yesudas
- School of Chemistry
- Indian Institute of Science Education and Research
- Thiruvananthapuram – 695 016
- India
| | - Eluvathingal D. Jemmis
- School of Chemistry
- Indian Institute of Science Education and Research
- Thiruvananthapuram – 695 016
- India
| | - Kotamarthi Bhanuprakash
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad – 500 007
- India
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30
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Blas-Ferrando VM, Ortiz J, González-Pedro V, Sánchez RS, Mora-Seró I, Fernández-Lázaro F, Sastre-Santos Á. Efficient passivated phthalocyanine-quantum dot solar cells. Chem Commun (Camb) 2015; 51:1732-5. [DOI: 10.1039/c4cc08104h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The power conversion efficiency of CdSe and CdS quantum dot sensitized solar cells is enhanced up to 45% for CdSe and 104% for CdS by passivation with an asymmetrically disulfide substituted phthalocyanine.
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Affiliation(s)
| | - Javier Ortiz
- Área de Química Orgánica
- Instituto de Bioingeniería
- Universidad Miguel Hernández
- 03202 Elche
- Spain
| | - Victoria González-Pedro
- Grup de Dispositius Fotovoltaics i Optoelectrónics
- Departament de Física
- Universitat Jaume I
- 12071 Castelló
- Spain
| | - Rafael S. Sánchez
- Grup de Dispositius Fotovoltaics i Optoelectrónics
- Departament de Física
- Universitat Jaume I
- 12071 Castelló
- Spain
| | - Iván Mora-Seró
- Grup de Dispositius Fotovoltaics i Optoelectrónics
- Departament de Física
- Universitat Jaume I
- 12071 Castelló
- Spain
| | | | - Ángela Sastre-Santos
- Área de Química Orgánica
- Instituto de Bioingeniería
- Universidad Miguel Hernández
- 03202 Elche
- Spain
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32
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Wang L, Olivier Y, Prezhdo OV, Beljonne D. Maximizing Singlet Fission by Intermolecular Packing. J Phys Chem Lett 2014; 5:3345-3353. [PMID: 26278443 DOI: 10.1021/jz5015955] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel nonadiabatic molecular dynamics scheme is applied to study the singlet fission (SF) process in pentacene dimers as a function of longitudinal and lateral displacements of the molecular backbones. Detailed two-dimensional mappings of both instantaneous and long-term triplet yields are obtained, characterizing the advantageous and unfavorable stacking arrangements, which can be achieved by chemical substitutions to the bare pentacene molecule. We show that the SF rate can be increased by more than an order of magnitude through tuning the intermolecular packing, most notably when going from cofacial to the slipped stacked arrangements encountered in some pentacene derivatives. The simulations indicate that the SF process is driven by thermal electron-phonon fluctuations at ambient and high temperatures, expected in solar cell applications. Although charge-transfer states are key to construct continuous channels for SF, a large charge-transfer character of the photoexcited state is found to be not essential for efficient SF. The reported time domain study mimics directly numerous laser experiments and provides novel guidelines for designing efficient photovoltaic systems exploiting the SF process with optimum intermolecular packing.
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Affiliation(s)
- Linjun Wang
- †Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Yoann Olivier
- ‡Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
| | - Oleg V Prezhdo
- †Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - David Beljonne
- ‡Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
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33
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Synthesis of bifunctional Ru complexes with 1,2-dithiolane and carboxylate-substituted ligands. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Kim H, Ng CYW, Algar WR. Quantum dot-based multidonor concentric FRET system and its application to biosensing using an excitation ratio. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5676-5685. [PMID: 24810095 DOI: 10.1021/la501102x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A plethora of semiconductor quantum dot (QD)-based probes that rely on Förster resonance energy transfer (FRET) have been developed for the optical detection of a wide array of biological targets. To date, the vast majority of these probes have utilized one-step energy transfer between individual donor-acceptor pairs. Here, we report a new multidonor concentric FRET configuration that comprised two fluorescent dyes assembled around a central CdSeS/ZnS QD through peptide linkers. One of these dyes, either Alexa Fluor 555 (A555) or Alexa Fluor 647 (A647), served as an acceptor for both the central QD and the other coassembled dye, Alexa Fluor 488 (A488). The unresolved emission between the A488 and the QD precluded a standard analysis of FRET efficiency from quenching of donor emission intensity or decay time, instead necessitating an analysis of the two energy transfer pathways from deconvolved excitation spectra. When A647 was the terminal acceptor, both the QD-to-A647 and A488-to-A647 energy transfer pathways could be interrogated with blue light, but only the former could be interrogated with violet light. The different degrees of A647 sensitization between these two excitation wavelengths was a predictable function of the above energy transfer efficiencies and dye stoichiometry, and was exploited for quantitative bioanalysis through an excitation ratio, which is in contrast to the conventional use of an emission ratio with FRET-based probes. Detection of the activity of nanomolar concentrations of trypsin, a model protease that hydrolyzed the A488-labeled peptide linker, was demonstrated using both a fluorescence plate reader and a low-cost, compact device that used two low-power light-emitting diodes (LEDs) as excitation sources and a silicon photodiode to detect A647 emission. This multidonor concentric FRET configuration represents a new modality for ratiometric biosensing with QDs and is potentially useful for portable in vitro diagnostics.
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Affiliation(s)
- Hyungki Kim
- Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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35
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De Filippo CC, Tang H, Ravotto L, Bergamini G, Salice P, Mba M, Ceroni P, Galoppini E, Maggini M. Synthesis and Electronic Properties of 1,2‐Hemisquarimines and Their Encapsulation in a Cucurbit[7]uril Host. Chemistry 2014; 20:6412-20. [DOI: 10.1002/chem.201400039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Indexed: 01/15/2023]
Affiliation(s)
- Christian C. De Filippo
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova (Italy), Fax: (+) 30 0498275050
| | - Hao Tang
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ ‐ 07102 (USA)
| | - Luca Ravotto
- Department of Chemistry “G. Ciamician”, Via Selmi 2, 40126 Bologna (Italy)
| | - Giacomo Bergamini
- Department of Chemistry “G. Ciamician”, Via Selmi 2, 40126 Bologna (Italy)
| | - Patrizio Salice
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova (Italy), Fax: (+) 30 0498275050
| | - Miriam Mba
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova (Italy), Fax: (+) 30 0498275050
| | - Paola Ceroni
- Department of Chemistry “G. Ciamician”, Via Selmi 2, 40126 Bologna (Italy)
| | - Elena Galoppini
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ ‐ 07102 (USA)
| | - Michele Maggini
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova (Italy), Fax: (+) 30 0498275050
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36
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37
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Hines DA, Kamat PV. Recent advances in quantum dot surface chemistry. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3041-3057. [PMID: 24506801 DOI: 10.1021/am405196u] [Citation(s) in RCA: 165] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Quantum dot (QD) surface chemistry is an emerging field in semiconductor nanocrystal related research. Along with size manipulation, the careful control of QD surface chemistry allows modulation of the optical properties of a QD suspension. Even a single molecule bound to the surface can introduce new functionalities. Herein, we summarize the recent advances in QD surface chemistry and the resulting effects on optical and electronic properties. Specifically, this review addresses three main issues: (i) how surface chemistry affects the optical properties of QDs, (ii) how it influences the excited state dynamics, and (iii) how one can manipulate surface chemistry to control the interactions between QDs and metal oxides, metal nanoparticles, and in self-assembled QD monolayers.
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Affiliation(s)
- Douglas A Hines
- Notre Dame Radiation Laboratory, Department of Chemistry, Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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38
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Algar WR, Kim H, Medintz IL, Hildebrandt N. Emerging non-traditional Förster resonance energy transfer configurations with semiconductor quantum dots: Investigations and applications. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.07.015] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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39
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Narayanan R, Das A, Deepa M, Srivastava AK. Energy Relay from an Unconventional Yellow Dye to CdS/CdSe Quantum Dots for Enhanced Solar Cell Performance. Chemphyschem 2013; 14:4010-21. [DOI: 10.1002/cphc.201300605] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Indexed: 11/08/2022]
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40
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Huang H, Pan L, Lim CK, Gong H, Guo J, Tse MS, Tan OK. Hydrothermal growth of TiO2 nanorod arrays and in situ conversion to nanotube arrays for highly efficient quantum dot-sensitized solar cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:3153-60. [PMID: 23606243 DOI: 10.1002/smll.201203205] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 02/16/2013] [Indexed: 05/26/2023]
Abstract
TiO2 nanorod (NR) and nanotube (NT) arrays grown on transparent conductive substrates are attractive electrode for solar cells. In this paper, TiO2 NR arrays are hydrothermally grown on FTO substrate, and are in situ converted into NT arrays by hydrothermally etching. The TiO2 NR arrays are reported as single crystalline, but the TiO2 NR arrays are demonstrated to be polycrystalline with a bundle of 2-5 nm single crystalline nanocolumns grown along [001] throughout the whole NR from bottom to top. TiO2 NRs can be converted to NTs by hydrothermal selective etching of the (001) core and remaining the inert sidewall of (110) face. A growth mechanism of the NR and NT arrays is proposed. Quantum dot-sensitized solar cells (QDSCs) are fabricated by coating CdSe QDs on to the TiO2 arrays. After conversion from NRs to NTs, more QDs can be filled in the NTs and the energy conversion efficiency of the QDSCs almost double.
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Affiliation(s)
- Hui Huang
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, 638075, Singapore.
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41
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Hybrid metal oxides quantum dots/TiO2 block composites: Facile synthesis and photocatalysis application. POWDER TECHNOL 2013. [DOI: 10.1016/j.powtec.2013.05.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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42
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Chen Z, Tang M, Song L, Tang G, Zhang B, Zhang L, Yang J, Hu J. In situ growth of CuInS 2 nanocrystals on nanoporous TiO 2 film for constructing inorganic/organic heterojunction solar cells. NANOSCALE RESEARCH LETTERS 2013; 8:354. [PMID: 23947562 PMCID: PMC3765538 DOI: 10.1186/1556-276x-8-354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/08/2013] [Indexed: 05/22/2023]
Abstract
Inorganic/organic heterojunction solar cells (HSCs) have attracted increasing attention as a cost-effective alternative to conventional solar cells. This work presents an HSC by in situ growth of CuInS2(CIS) layer as the photoabsorption material on nanoporous TiO2 film with the use of poly(3-hexylthiophene) (P3HT) as hole-transport material. The in situ growth of CIS nanocrystals has been realized by solvothermally treating nanoporous TiO2 film in ethanol solution containing InCl3 · 4H2O, CuSO4 · 5H2O, and thioacetamide with a constant concentration ratio of 1:1:2. InCl3 concentration plays a significant role in controlling the surface morphology of CIS layer. When InCl3 concentration is 0.1 M, there is a layer of CIS flower-shaped superstructures on TiO2 film, and CIS superstructures are in fact composed of ultrathin nanoplates as ‘petals’ with plenty of nanopores. In addition, the nanopores of TiO2 film are filled by CIS nanocrystals, as confirmed using scanning electron microscopy image and by energy dispersive spectroscopy line scan analysis. Subsequently, HSC with a structure of FTO/TiO2/CIS/P3HT/PEDOT:PSS/Au has been fabricated, and it yields a power conversion efficiency of 1.4%. Further improvement of the efficiency can be expected by the optimization of the morphology and thickness of CIS layer and the device structure.
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Affiliation(s)
- Zhigang Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Minghua Tang
- Analysis and Testing Center, Soochow University, Suzhou 215123, China
| | - Linlin Song
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Guoqiang Tang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Bingjie Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Lisha Zhang
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Jianmao Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
- Research Center for Analysis and Measurement, Donghua University, Shanghai 201620, China
| | - Junqing Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
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43
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Pu YC, Wang G, Chang KD, Ling Y, Lin YK, Fitzmorris BC, Liu CM, Lu X, Tong Y, Zhang JZ, Hsu YJ, Li Y. Au nanostructure-decorated TiO2 nanowires exhibiting photoactivity across entire UV-visible region for photoelectrochemical water splitting. NANO LETTERS 2013; 13:3817-23. [PMID: 23899318 DOI: 10.1021/nl4018385] [Citation(s) in RCA: 386] [Impact Index Per Article: 35.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Here we demonstrate that the photoactivity of Au-decorated TiO2 electrodes for photoelectrochemical water oxidation can be effectively enhanced in the entire UV-visible region from 300 to 800 nm by manipulating the shape of the decorated Au nanostructures. The samples were prepared by carefully depositing Au nanoparticles (NPs), Au nanorods (NRs), and a mixture of Au NPs and NRs on the surface of TiO2 nanowire arrays. As compared with bare TiO2, Au NP-decorated TiO2 nanowire electrodes exhibited significantly enhanced photoactivity in both the UV and visible regions. For Au NR-decorated TiO2 electrodes, the photoactivity enhancement was, however, observed in the visible region only, with the largest photocurrent generation achieved at 710 nm. Significantly, TiO2 nanowires deposited with a mixture of Au NPs and NRs showed enhanced photoactivity in the entire UV-visible region. Monochromatic incident photon-to-electron conversion efficiency measurements indicated that excitation of surface plasmon resonance of Au is responsible for the enhanced photoactivity of Au nanostructure-decorated TiO2 nanowires. Photovoltage experiment showed that the enhanced photoactivity of Au NP-decorated TiO2 in the UV region was attributable to the effective surface passivation of Au NPs. Furthermore, 3D finite-difference time domain simulation was performed to investigate the electrical field amplification at the interface between Au nanostructures and TiO2 upon SPR excitation. The results suggested that the enhanced photoactivity of Au NP-decorated TiO2 in the UV region was partially due to the increased optical absorption of TiO2 associated with SPR electrical field amplification. The current study could provide a new paradigm for designing plasmonic metal/semiconductor composite systems to effectively harvest the entire UV-visible light for solar fuel production.
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Affiliation(s)
- Ying-Chih Pu
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC
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44
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Abstract
The recent surge in the utilization of semiconductor nanostructures for solar energy conversion has led to the development of high-efficiency solar cells. Some of these recent advances are in the areas of synthesis of new semiconductor materials and the ability to tune the electronic properties through size, shape, and composition and to assemble quantum dots as hybrid assemblies. In addition, processes such as hot electron injection, multiple exciton generation (MEG), plasmonic effects, and energy-transfer-coupled electron transfer are gaining momentum to overcome the efficiency limitations of energy capture and conversion. The recent advances as well as future prospects of quantum dot solar cells discussed in this perspective provide the basis for consideration as "The Next Big Thing" in photovoltaics.
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Affiliation(s)
- Prashant V Kamat
- Radiation Laboratory and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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45
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Santra PK, Nair PV, George Thomas K, Kamat PV. CuInS2-Sensitized Quantum Dot Solar Cell. Electrophoretic Deposition, Excited-State Dynamics, and Photovoltaic Performance. J Phys Chem Lett 2013; 4:722-729. [PMID: 26281925 DOI: 10.1021/jz400181m] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ternary metal chalcogenides such as CuInS2 offer new opportunities to design quantum dot solar cells (QDSC). Chemically synthesized CuInS2 quantum dots (particle diameter, 2.6 nm) have been successfully deposited within the mesoscopic TiO2 film using electrophoretic deposition (150 V cm(-1) dc field). The primary photoinduced process of electron injection from excited CuInS2 into TiO2 occurs with a rate constant of 5.75 × 10(11) s(-1). The TiO2/CuInS2 films are photoactive and produce anodic photocurrent with a power conversion efficiency of 1.14%. Capping the TiO2/CuInS2 film with a CdS layer decreases the interfacial charge recombination and thus offers further improvement in the power conversion efficiency (3.91%). The synergy of using CdS as a passivation layer in the composite film is also evident from the increased external quantum efficiency of the electrode in the red region where only CuInS2 absorbs the incident light.
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Affiliation(s)
- Pralay K Santra
- †Radiation Laboratory, Departments of Chemistry and Biochemistry, Chemical and Biomoelcular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Pratheesh V Nair
- †Radiation Laboratory, Departments of Chemistry and Biochemistry, Chemical and Biomoelcular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- ‡School of Chemistry, Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM), CET Campus, Thiruvananthapuram 695 016, India
| | - K George Thomas
- ‡School of Chemistry, Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM), CET Campus, Thiruvananthapuram 695 016, India
| | - Prashant V Kamat
- †Radiation Laboratory, Departments of Chemistry and Biochemistry, Chemical and Biomoelcular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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Santra PK, Kamat PV. Tandem-Layered Quantum Dot Solar Cells: Tuning the Photovoltaic Response with Luminescent Ternary Cadmium Chalcogenides. J Am Chem Soc 2013; 135:877-85. [DOI: 10.1021/ja310737m] [Citation(s) in RCA: 238] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Pralay K. Santra
- Radiation Laboratory, Department
of Chemistry and Biochemistry
and Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556,
United States
| | - Prashant V. Kamat
- Radiation Laboratory, Department
of Chemistry and Biochemistry
and Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556,
United States
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Patil SA, Shinde DV, Bhande SS, Jadhav VV, Huan TN, Mane RS, Han SH. Current density enhancement in ZnO/CdSe photoelectrochemical cells in the presence of a charge separating SnO2 nanoparticles interfacing-layer. Dalton Trans 2013; 42:13065-70. [DOI: 10.1039/c3dt51149a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yang J, Kim JY, Yu JH, Ahn TY, Lee H, Choi TS, Kim YW, Joo J, Ko MJ, Hyeon T. Copper–indium–selenide quantum dot-sensitized solar cells. Phys Chem Chem Phys 2013; 15:20517-25. [DOI: 10.1039/c3cp54270j] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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