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Panigrahi A, Mishra L, Dubey P, Dutta S, Mondal S, Sarangi MK. Interplay between photoinduced charge and energy transfer in manganese doped perovskite quantum dots. J Chem Phys 2024; 160:244702. [PMID: 38912633 DOI: 10.1063/5.0205610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 06/04/2024] [Indexed: 06/25/2024] Open
Abstract
A comprehensive study on the photo-excited relaxation dynamics in semiconducting perovskite quantum dots (PQDs) is pivotal in realizing their extensive potential for optoelectronics applications. Among different competing photoinduced relaxation kinetics, energy transfer and charge transfer (CT) in PQDs need special attention, as they often influence the device efficacy, particularly with the donor-acceptor hybrid architecture. In this work, we explore a detailed investigation into photoinduced CT dynamics in mixed halide undoped CsPb(Br/Cl)3 and Mn2+ doped CsPb(Br/Cl)3 PQDs with a quinone molecule, p-benzoquinone (BQ). The energy level alignment of undoped PQDs with BQ allows an efficient CT, whereas Mn2+ doping reduces the CT efficiency, experiencing a competition between energy transfer from host to dopant and CT to BQ. The conductive atomic force microscopy measurements unveil a direct correlation with the spectroscopic studies by showing a significant improvement in the conductance of undoped PQDs in the presence of BQ, while an inappreciable change is observed for doped PQDs. A much-reduced transition voltage and barrier height in the presence of BQ further validate faster CT for undoped PQD than the doped one. Furthermore, Mn2+ doping in PQDs is observed to enhance their stability, showing better air and thermal stability compared to their undoped counterparts. These results reveal that doping strategy can regulate the CT dynamics in these PQDs and increase their stability, which will be beneficial for the development of desired optoelectronic devices with long-term stability.
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Affiliation(s)
- Aradhana Panigrahi
- 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
| | - Sankalan Mondal
- Department of Physics, Indian Institute of Technology, Patna 801106, India
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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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Mishra L, Kumar A, Panigrahi A, Dubey P, Dutta S, Parida P, Sarangi MK. Unraveling the Relevance of Electron and Hole Transfer in Lead Halide Perovskite Nanocrystals on Current Conduction. J Phys Chem Lett 2023; 14:7340-7345. [PMID: 37561565 DOI: 10.1021/acs.jpclett.3c01893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Optimization of perovskite-based optoelectronic performance demands prudent engineering in the device architecture with facile transport of generated charge carriers. Herein, we explore the charge transfer (CT) kinetics in perovskite nanocrystals (PNCs), CsPbBr3, with two redox-active quinones, menadione (MD) and anthraquinone (AQ), and its alteration in halide exchanged CsPbCl3. With a series of spectroscopic and microscopic measurements, we infer that both electron and hole transfer (ET-HT) prevail in CsPbCl3 with quinones, resulting in a faster CT, while ET predominates for CsPbBr3. Furthermore, current-sensing atomic force microscopy measurements demonstrate that the conductance across a metal-PNC-metal nanojunction is improved in the presence of quinones. The contributions of ET and HT to current conduction across PNCs are well supported and validated by theoretical calculations of the density of states. These outcomes convey a new perspective on the relevance of ET and HT in the optimal current conduction and optoelectronic device engineering of perovskites.
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Affiliation(s)
- Leepsa Mishra
- Department of Physics, Indian Institute of Technology Patna, Bihar, India 801106
| | - Ajay Kumar
- Department of Physics, Indian Institute of Technology Patna, Bihar, India 801106
| | - Aradhana Panigrahi
- Department of Physics, Indian Institute of Technology Patna, Bihar, India 801106
| | - Priyanka Dubey
- Department of Physics, Indian Institute of Technology Patna, Bihar, India 801106
| | - Soumi Dutta
- Department of Physics, Indian Institute of Technology Patna, Bihar, India 801106
| | - Prakash Parida
- 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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Kipkorir A, Jin X, Gao H, Kamat PV. Photoinduced electron transfer across the polymer-capped CsPbBr 3 interface in a polar medium. J Chem Phys 2023; 158:144702. [PMID: 37061503 DOI: 10.1063/5.0143920] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2023] Open
Abstract
In-situ polymer capping of cesium lead bromide (CsPbBr3) nanocrystals with polymethyl acrylate is an effective approach to improve the colloidal stability in the polar medium and thus extends their use in photocatalysis. The photoinduced electron transfer properties of polymethyl acrylate (PMA)-capped CsPbBr3 nanocrystals have been probed using surface-bound viologen molecules with different alkyl chains as electron acceptors. The apparent association constant (Kapp) obtained for the binding of viologen molecules with PMA-capped CsPbBr3 was 2.3 × 107 M-1, which is an order of magnitude greater than that obtained with oleic acid/oleylamine-capped CsPbBr3. Although the length of the alkyl chain of the viologen molecule did not show any impact on the electron transfer rate constant, it influenced the charge separation efficiency and net electron transfer quantum yield. Viologen moieties with a shorter alkyl chain length exhibited a charge separation efficiency of 72% compared with 50% for the longer chain alkyl chain length viologens. Implications of polymer-capped CsPbBr3 perovskite nanocrystals for carrying out photocatalytic reduction in the polar medium are discussed.
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Affiliation(s)
- Anthony Kipkorir
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Xiuyu Jin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Haifeng Gao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Prashant V Kamat
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
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Sansoni S, Anoè FM, Meneghetti M. Simple and sustainable synthesis of perovskite-based optoelectronic material: CsPbBr 3 nanocrystals via laser ablation in alcohol. NANOSCALE ADVANCES 2022; 4:5009-5014. [PMID: 36504746 PMCID: PMC9680829 DOI: 10.1039/d2na00596d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Accepted: 10/12/2022] [Indexed: 06/17/2023]
Abstract
All-inorganic lead halide perovskite nanocrystals (NCs) have shown great potential as emerging semiconducting materials due to their excellent optoelectronic properties. However, syntheses in solution commonly use high temperatures and toxic solvents, which are obstacles for safety and sustainability of the process. In this work, laser ablation in alcohol is proposed as a simple and sustainable, ligand-free, top-down approach to synthesize CsPbBr3 nanocrystals in ambient conditions. The effects of different low boiling point commercial alcohols used as solvents on the optical properties of CsPbBr3 NCs colloidal solutions are investigated. Although in traditional bottom-up synthesis alcohols are usually found to be not appropriate for the synthesis of perovskite NCs, here it is demonstrated that CsPbBr3 orthorhombic nanocrystals with narrow full width half maximum (FWHM < 18 nm), long photoluminescence lifetimes (up to 17.9 ns) and good photoluminescence quantum yield (PLQY up to 15.5%) can be obtained by selecting the dielectric constant and polarity of the alcohol employed for the synthesis.
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Affiliation(s)
- Simone Sansoni
- Department of Chemical Sciences, University of Padua Padua 35131 Italy
| | - Filippo M Anoè
- Department of Chemical Sciences, University of Padua Padua 35131 Italy
| | - Moreno Meneghetti
- Department of Chemical Sciences, University of Padua Padua 35131 Italy
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Konda SR, Ganeev RA, Kim VV, Ketavath R, Yu J, Li W. High-order harmonics generation in nanosecond-pulses-induced plasma containing Ni-doped CsPbBr 3perovskite nanocrystals using chirp-free and chirped femtosecond pulses. NANOTECHNOLOGY 2022; 34:055705. [PMID: 36327449 DOI: 10.1088/1361-6528/ac9fdb] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
We demonstrate high-order harmonic generation in Ni-doped CsPbBr3perovskite nanocrystals ablated by nanosecond pulses using chirp-free 35 fs, and chirped 135 fs pulses in the case of single-color pump (800 nm) and a two-color pump (800 and 400 nm). We analyzed the spectral shift, cut-off, and intensity distribution of harmonics in the case of chirped drving pulses compared to chirp-free pulses. It is shown that the presence of Ni dopants and CsPbBr3plasma components improves the harmonics emission. Also, we measured the third-order nonlinear optical (NLO) properties of these nanocrystals using 800 nm, 60 fs, 1 kHz pulses. The variations of measured NLO parameters of CsPbBr3perovskite nanocrystals containing different concentrations of nickel correlate with variations of generated high-order harmonics from laser induced plasmas of studied nanocrystals in terms of harmonics intensity, cut-off, and spectral shift (in case of chirped driving pulses). The spectral shift of the harmonics generated from the Ni-doped CsPbBr3perovskite nanocrystals can be used to form tunable extreme ultraviolet sources.
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Affiliation(s)
- Srinivasa Rao Konda
- GPL photonics laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People's Republic of China
| | - Rashid A Ganeev
- Laboratory of Nonlinear Optics, Institute of Astronomy, University of Latvia, Jelgavas iela 3, Riga, LV-1004, Latvia
- Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, National Research University, Kori Niyazov street 39, Tashkent 100000, Uzbekistan
- Department of Physics, Voronezh State University, Voronezh 394006, Russia
| | - Vyacheslav V Kim
- Laboratory of Nonlinear Optics, Institute of Astronomy, University of Latvia, Jelgavas iela 3, Riga, LV-1004, Latvia
| | - Ravi Ketavath
- Solar Cells and Photonics Research Laboratory, School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India
| | - Jiaqi Yu
- GPL photonics laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People's Republic of China
| | - Wei Li
- GPL photonics laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People's Republic of China
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Shen KA, Shi CG. Encapsulation of perovskite nanocrystals into an organic polymer for improved stability. NEW J CHEM 2021. [DOI: 10.1039/d1nj00507c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-Aminopropyltriethoxysilane is developed as a binder to fill the molecular gap between PNCs and PMMA, which significantly improves the stability of PNCs against moisture and irradiation.
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Affiliation(s)
- Kang-An Shen
- School of Public Health
- Nantong University
- Nantong 226019
- P. R. China
| | - Chuan-Guo Shi
- School of Chemistry and Chemical Engineering
- Nantong University
- Nantong 226019
- P. R. China
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