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Panigrahi A, Kumar A, Mishra L, Dubey P, Dutta S, Parida P, Sarangi MK. Modulation of carrier conduction in CsPbBr3 perovskite quantum dots with band-aligned electron and hole acceptors. J Chem Phys 2023; 159:184704. [PMID: 37942870 DOI: 10.1063/5.0174262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 10/23/2023] [Indexed: 11/10/2023] Open
Abstract
The lead halide perovskites have emerged as promising materials with intriguing photo-physical properties and have immense potential for photovoltaic applications. A comprehensive study on the kinetics of charge carrier (electron/hole) generation and transfer across the interface is key to realizing their future scope for efficient device engineering. Herein, we investigate the interfacial charge transfer (CT) dynamics in cesium lead halide (CsPbBr3) perovskite quantum dots (PQDs) with energetically favorable electron acceptors, anthraquinone (AQ) and p-benzoquinone (BQ), and hole acceptors such as pyrene and 4-(dimethylamino)pyridine (DMAP). With various steady-state and time-resolved spectroscopic and microscopic measurements, a faster electron transfer rate is estimated for CsPbBr3 PQDs with BQ compared to that of AQ, while a superior hole transfer for DMAP is divulged compared to pyrene. In concurrence with the spectroscopic measurements, conducting atomic force microscopic studies across the electrode-PQD-electrode junction reveals an increment in the conductance of the PQD in the presence of both the electron and hole acceptors. The variation of the density of states calculation in the presence of the hole acceptors offers strong support and validation for faster CT efficiency. The above findings suggest that a careful selection of simple yet efficient molecular arrangements can facilitate rapid carrier transfer, which can be designed as auxiliary layers for smooth CT and help in the engineering of cost-effective photovoltaic devices.
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Affiliation(s)
- Aradhana Panigrahi
- Department of Physics, Indian Institute of Technology, Patna 801106, India
| | - Ajay Kumar
- Department of Physics, Indian Institute of Technology, Patna 801106, India
| | - Leepsa Mishra
- Department of Physics, Indian Institute of Technology, Patna 801106, India
| | - Priyanka Dubey
- Department of Physics, Indian Institute of Technology, Patna 801106, India
| | - Soumi Dutta
- Department of Physics, Indian Institute of Technology, Patna 801106, India
| | - Prakash Parida
- Department of Physics, Indian Institute of Technology, Patna 801106, India
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Regulating Optoelectronics of Carbon Dots with Redox-active Dopamine. TALANTA OPEN 2023. [DOI: 10.1016/j.talo.2023.100198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023] Open
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Mishra L, Behera RK, Panigrahi A, Sarangi MK. Förster Resonance Energy Transfer Assisted Enhancement in Optoelectronic Properties of Metal Halide Perovskite Nanocrystals. J Phys Chem Lett 2022; 13:4357-4364. [PMID: 35543548 DOI: 10.1021/acs.jpclett.2c00764] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Regulated excited state energy and charge transfer play a pivotal role in nanoscale semiconductor device performance for efficient energy harvesting and optoelectronic applications. Herein, we report the influence of Förster resonance energy transfer (FRET) on the excited-state dynamics and charge transport properties of metal halide perovskite nanocrystals (PNCs), CsPbBr3, and its anion-exchanged counterpart CsPbCl3 with CdSe/ZnS quantum dots (QDs). We report a drop in the FRET efficiency from ∼85% (CsPbBr3) to ∼5% (CsPbCl3) with QDs, inviting significant alteration in their charge transport properties. Using two-probe measurements we report substantial enhancement in the current for the blend structure of PNCs with QDs, originating from the reduced trap sites, compared to that of the pristine PNCs. The FRET-based upshot in the conduction mechanism with features of negative differential resistance and negligible hysteresis for CsPbBr3 PNCs can add new directions to high performance-based photovoltaics and optoelectronics.
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Affiliation(s)
- Leepsa Mishra
- Department of Physics, Indian Institute of Technology Patna, Bihar, India, 801106
| | - Ranjan Kumar Behera
- Department of Physics, Indian Institute of Technology Patna, Bihar, India, 801106
| | - Aradhana Panigrahi
- Department of Physics, Indian Institute of Technology Patna, Bihar, India, 801106
| | - Manas Kumar Sarangi
- Department of Physics, Indian Institute of Technology Patna, Bihar, India, 801106
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Behera RK, Mishra L, Panigrahi A, Sahoo PK, Sarangi MK. Tunable Conductance of MoS 2 and WS 2 Quantum Dots by Electron Transfer with Redox-Active Quinone. ACS APPLIED MATERIALS & INTERFACES 2022; 14:5750-5761. [PMID: 35049294 DOI: 10.1021/acsami.1c18092] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Due to their uniqueness in tunable photophysics, transition metal dichalcogenide (TMD) based quantum dots (QDs) have emerged as the next-generation quantum materials for technology-based semiconductor applications. This demands frontline research on the rational synthesis of the TMD QDs with controlled shape, size, nature of charge migration at the interface, and their easy integration in optoelectronic devices. In this article, with a controlled solution-processed synthesis of MoS2 and WS2 QDs, we demonstrate the disparity in their structural, optical, and electrical characteristics in bulk and confinement. With a series of steady-state and time-resolved spectroscopic measurements in different media, we explore the uncommon photophysics of MoS2 and WS2 QDs such as excitation-dependent photoluminescence and assess their excited state charge transfer kinetics with a redox-active biomolecule, menadione (MQ). In comparison to the homogeneous aqueous medium, photoinduced charge transfer between the QDs and MQ becomes more plausible in encapsulated cetyltrimethylammonium bromide (CTAB) micelles. Current sensing atomic force microscopy (CS-AFM) measurements at a single molecular level reveal that the facilitated charge transfer of QDs with MQ strongly correlates with an enhancement in their charge transport behavior. An increase in charge transport further depends on the density of states of the QDs directing a change in Schottky emission to Fowler-Nordheim (FN) type of tunneling across the metal-QD-metal junction. The selective response of the TMD QDs while in proximity to external molecules can be used to design advanced optoelectronic devices and applications involving rectifiers and tunnel diodes for future quantum technology.
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Affiliation(s)
- Ranjan Kumar Behera
- Department of Physics, Indian Institute of Technology Patna, Bihta, Kanpa Road, Patna, Bihar 801106, India
| | - Leepsa Mishra
- Department of Physics, Indian Institute of Technology Patna, Bihta, Kanpa Road, Patna, Bihar 801106, India
| | - Aradhana Panigrahi
- Department of Physics, Indian Institute of Technology Patna, Bihta, Kanpa Road, Patna, Bihar 801106, India
| | - Prasana Kumar Sahoo
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Manas Kumar Sarangi
- Department of Physics, Indian Institute of Technology Patna, Bihta, Kanpa Road, Patna, Bihar 801106, India
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Behera RK, Sau A, Mishra L, Mondal S, Bera K, Kumar S, Basu S, Sarangi MK. Metal nanoparticle alters adenine induced charge transfer kinetics of vitamin K3 in magnetic field. Sci Rep 2020; 10:18454. [PMID: 33116189 PMCID: PMC7595215 DOI: 10.1038/s41598-020-75262-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/28/2020] [Indexed: 01/05/2023] Open
Abstract
In this article, we highlight the alterations in the photoinduced electron transfer (ET) and hydrogen atom transfer (HAT) pathways between an anti-tumor drug vitamin-K3 (MQ) and a nucleobase adenine (ADN) in the presence of gold (Au) and iron (Fe) nanoparticles (NPs). Inside the confined micellar media, with laser flash photolysis corroborated with an external magnetic field (MF), we have detected the transient geminate radicals of MQ and ADN, photo-generated through ET and HAT. We observe that the presence of AuNP on the MQ-ADN complex (AuMQ-ADN) assists HAT by limiting the ET channel, on the other hand, FeNP on the MQ-ADN complex (FeMQ-ADN) mostly favors a facile PET. We hypothesize that through selective interactions of the ADN molecules with AuNP and MQ molecules with FeNP, a preferential HAT and PET process is eased. The enhanced HAT and PET have been confirmed by the escape yields of radical intermediates by time-resolved transient absorption spectroscopy in the presence of MF.
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Affiliation(s)
| | - Abhishek Sau
- Chemical Sciences Division, Saha Institute of Nuclear Physics, Kolkata, India.,Department of Molecular and Cellular Medicine, Texas A&M University, College Station, USA
| | - Leepsa Mishra
- Department of Physics, Indian Institute of Technology Patna, Patna, India
| | - Sankalan Mondal
- Department of Physics, Indian Institute of Technology Patna, Patna, India
| | - Kallol Bera
- Chemical Sciences Division, Saha Institute of Nuclear Physics, Kolkata, India.,Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, USA
| | - Satish Kumar
- Department of Physics, Indian Institute of Technology Patna, Patna, India
| | - Samita Basu
- Chemical Sciences Division, Saha Institute of Nuclear Physics, Kolkata, India
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Chelli R, Pietraperzia G, Bencini A, Giorgi C, Lippolis V, Salvi PR, Gellini C. A fluorescent receptor for halide recognition: clues for the design of anion chemosensors. Phys Chem Chem Phys 2015; 17:10813-22. [PMID: 25814174 DOI: 10.1039/c5cp00131e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The chemosensing properties of the polyaza-macrocycle 1-(6,7)-acridine-3,6,9,12-tetraaza-tridecaphane have been investigated by means of emission fluorescence spectroscopy, considering halide ions as substrates. As in the case of the free ligand, the fluorescence emission of the complexes is due to the acridinium species which are formed after photoinduced proton transfer reaction. The complexation constants have been obtained for the bi- and tri-protonated ligands in deoxygenated aqueous solutions. Two different emission behaviours have been observed varying the anion. Fluoride and chloride give rise to fluorescence enhancement whereas bromide and iodide strongly quench the emission. The macrocycle shows an unusual higher selectivity towards the chloride anion rather than fluoride. The fluorescence emission has been modelled considering a modified Stern-Volmer equation, taking into account the quenching effects of the largest anions, which can be considered negligible for fluoride and chloride anions. Ab initio calculations allow us to interpret the fluorescence emission of the complexes in terms of activation energy related to the proton transfer reaction responsible for the emission process.
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Affiliation(s)
- Riccardo Chelli
- Dipartimento di Chimica, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy.
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Sengupta C, Sarangi MK, Sau A, Mandal D, Basu S. A case study of photo induced electron transfer between riboflavin and aliphatic amine: Deciphering different mechanisms of ET operating from femtosecond to microsecond time domain. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2014.09.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Reverse micelles as a tool for probing solvent modulation of protein dynamics: Reverse micelle encapsulated hemoglobin. Chem Phys 2013; 430:88-97. [PMID: 24039330 DOI: 10.1016/j.chemphys.2013.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Hydration waters impact protein dynamics. Dissecting the interplay between hydration waters and dynamics requires a protein that manifests a broad range of dynamics. Proteins in reverse micelles (RMs) have promise as tools to achieve this objective because the water content can be manipulated. Hemoglobin is an appropriate tool with which to probe hydration effects. We describe both a protocol for hemoglobin encapsulation in reverse micelles and a facile method using PEG and cosolvents to manipulate water content. Hydration properties are probed using the water-sensitive fluorescence from Hb bound pyranine and covalently attached Badan. Protein dynamics are probed through ligand recombination traces derived from photodissociated carbonmonoxy hemoglobin on a log scale that exposes the potential role of both α and β solvent fluctuations in modulating protein dynamics. The results open the possibility of probing hydration level phenomena in this system using a combination of NMR and optical probes.
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Puccioni S, Bazzicalupi C, Bencini A, Giorgi C, Valtancoli B, De Filippo G, Lippolis V, Salvi PR, Pietraperzia G, Chelli R, Gellini C. Tuning the Emission Properties of Fluorescent Ligands by Changing pH: The Unusual Case of an Acridine-Containing Polyamine Macrocycle. J Phys Chem A 2013; 117:3798-808. [DOI: 10.1021/jp4015756] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefano Puccioni
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Carla Bazzicalupi
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Andrea Bencini
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Claudia Giorgi
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Barbara Valtancoli
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Greta De Filippo
- Dipartimento di Scienze Chimiche
e Geologiche, Università di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche
e Geologiche, Università di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Pier Remigio Salvi
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
| | - Giangaetano Pietraperzia
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
| | - Riccardo Chelli
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
| | - Cristina Gellini
- Dipartimento di Chimica “Ugo
Schiff”, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
- European Laboratory for Nonlinear Spectroscopy (LENS), Via Nello Carrara
1, 50019 Sesto Fiorentino, Firenze, Italy
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Supramolecular host–guest interaction of acridine dye with cyclodextrin macrocycles: Photophysical, pKa shift and quenching study. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.02.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mitra P, Chakraborty B, Bhattacharyya D, Basu S. Excimer of 9-aminoacridine hydrochloride hydrate in confined medium: an integrated experimental and theoretical study. J Phys Chem A 2013; 117:1428-38. [PMID: 23346864 DOI: 10.1021/jp3103639] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We aim to find out the extent of stability of the excimer of 9-aminoacridine hydrochloride hydrate (9AA), a prospective PDT drug, in different confined media with varying cavity size. When confined in cetyltrimethyl ammonium bromide micelles, although at low concentration of 9AA, only a single distinct peak (λ(max) at 460 nm) with a shoulder at 485 nm is observed in steady-state fluorescence spectrum, yet with increase in concentration the peak and the shoulder merge with simultaneous emergence of another peak at 535 nm, which is assigned to excimer. Similar behavior is also observed in Triton-X, crown ether, α-cyclodextrin, β-cyclodextrin, and homogeneous aqueous medium. The formation of excimer, which reflects the extent of confinement of 9AA, is maximum in β-cyclodextrin followed by others. Steady-state and time-resolved fluorescence studies along with TRES and TRANES analyses coupled with anisotropy data and transient absorption studies reveal the presence of monomer-dimer equilibrium of 9AA in the excited state. Molecular modeling indicates that the structure of excimer is stabilized by locking of the two monomeric species via four hydrogen bonds formed between the amino-H and imino-N of 9AA monomers, whereas the dimer in the ground state has only two such hydrogen bonds.
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Affiliation(s)
- Piyali Mitra
- Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064, India
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Sarangi MK, Bhattacharyya D, Basu S. Influence of 2′-Deoxy Sugar Moiety on Excited-State Protonation Equilibrium of Adenine and Adenosine with Acridine inside SDS Micelles: A Time-Resolved Study with Quantum Chemical Calculations. Chemphyschem 2012; 13:525-34. [DOI: 10.1002/cphc.201100763] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Indexed: 11/10/2022]
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Zhu R, Lu R, Yu A. Photophysics and locations of IR125 and C152 in AOT reverse micelles. Phys Chem Chem Phys 2011; 13:20844-54. [DOI: 10.1039/c1cp21946d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sarangi MK, Basu S. Photophysical behavior of acridine with amines within the micellar microenvironment of SDS: a time-resolved fluorescence and laser flash photolysis study. Phys Chem Chem Phys 2011; 13:16821-30. [DOI: 10.1039/c1cp20844f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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