1
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Shukla A, Kaur G, Babu KJ, Bhatt H, Ghosh HN. Unraveling the cation dependent carrier cooling and transient mobility in lead-free A3Sb2I9 perovskites. J Chem Phys 2024; 160:244706. [PMID: 38920401 DOI: 10.1063/5.0208324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 05/16/2024] [Indexed: 06/27/2024] Open
Abstract
Lead halide perovskites (LHPs) have gained prominence for their exceptional photophysical properties, holding promise for applications in high-end optoelectronic devices. However, the presence of lead is one of the major obstacles to the commercialization of LHPs in the field of photovoltaics. To address this, researchers have explored environment friendly lead-free perovskite solar cells by investigating non-toxic perovskite materials. This study explores the enhancement of photophysical properties through chemical engineering, specifically cation exchange, focusing on the crucial photophysical process of hot carrier cooling. Employing femtosecond transient absorption spectroscopy and optical pump terahertz probe spectroscopy, we have probed the carrier relaxation dynamics in A3Sb2I9 with cesium and rubidium cations. This study unravels that the carrier relaxation is found to be slower in Rb3Sb2I9; along with this, the transient mobility decay is found to be retarded. Overall, this study suggests that an antimony-based Rb3Sb2I9 perovskite could be a substantial lead-free perovskite in photovoltaics. These findings provide valuable insights into cation engineering strategies, aiming to improve the overall performance of lead-free-based photovoltaic devices.
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Affiliation(s)
- Ayushi Shukla
- Institute of Nano Science and Technology, SAS Nagar, Sector 81, Mohali 140306, Punjab, India
| | - Gurpreet Kaur
- Institute of Nano Science and Technology, SAS Nagar, Sector 81, Mohali 140306, Punjab, India
| | - K Justice Babu
- Institute of Nano Science and Technology, SAS Nagar, Sector 81, Mohali 140306, Punjab, India
| | - Himanshu Bhatt
- Institute of Nano Science and Technology, SAS Nagar, Sector 81, Mohali 140306, Punjab, India
| | - Hirendra N Ghosh
- School of Chemical Science, National Institute of Science Education and Research, Jatni, Bhubaneswar 752050, Odisha, India
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2
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Thongnum A, Pingaew R, Pinsook U. Impact of the polar optical phonon and alloy scattering on the charge-carrier mobilities of FA 0.83Cs 0.17Pb(I 1-xBr x) 3 hybrid perovskites. Phys Chem Chem Phys 2021; 23:27320-27326. [PMID: 34850788 DOI: 10.1039/d1cp03698j] [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
Lead mixed-halide perovskites are promising absorption materials that are suitable for applications in tandem solar cells using existing silicon technology. Charge-carrier mobility is an important factor that affects the performance of tandem solar cells. However, a detailed understanding of the fundamental mechanisms of lead mixed-halide perovskites remains elusive. Here, we used LO (longitudinal optical) phonons and alloy scattering to the elucidate charge-carrier mobilities in the FA0.83Cs0.17Pb(I1-xBrx)3 hybrid perovskite system. It was found that these scattering mechanisms provided very good quantitative agreement with the experimental results, between 11-40 cm2 V-1 s-1. Our findings provide new insights into charge transport scattering in lead mixed-halide hybrid perovskites and pave the way toward design of novel semiconductor alloys for solar cell applications.
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Affiliation(s)
- Anusit Thongnum
- Department of Physics, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand.,Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand.
| | - Ratchanok Pingaew
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Udomsilp Pinsook
- Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok 10400, Thailand. .,Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10300, Thailand
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3
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Sun Q, Yang W, Cheng Y, Dong J, Zhu M, Zhang B, Dubois A, Zhu M, Jie W, Xu Y. Anisotropic dielectric behavior of layered perovskite-like Cs 3Bi 2I 9 crystals in the terahertz region. Phys Chem Chem Phys 2020; 22:24555-24560. [PMID: 33094305 DOI: 10.1039/d0cp04485g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ternary metal halide perovskites have gradually attracted attention for application in the optoelectronic field, owing to their tunable crystal structure and appropriate bandgap. Lead free Cs3Bi2I9 perovskite, with a 0D layered structure containing molecular [Bi2I9]3- dimers, exhibits prominent optical and electrical anisotropies. Here, the anisotropic properties of the Cs3Bi2I9 crystals were evaluated using terahertz time-domain spectroscopy (THz-TDS); meanwhile, the effect of phonon vibration on the THz transmission was confirmed using density functional perturbation theory (DFPT). Accordingly, the refractive index and extinction coefficient are estimated using THz-TDS, thanks to the high transmission in the range of 0.2-0.9 THz. The anisotropic refractive index was observed for the Cs3Bi2I9 crystals, and was found to be 3.2-3.7 for the (100) plane (CBI(100)) in contrast to 2.8-3.2 for the (001) plane (CBI(001)). Furthermore, the Lorentz model was employed to extract the dielectric constant of Cs3Bi2I9, in which anisotropy is obviously indicated by the static dielectric constant and the high-frequency dielectric constant. These anisotropic behaviors are determined by the dipole moment, which is attributed to the anisotropic packing density of [Bi2I9]3- dimers. This study is significant and provides a deeper insight into the anisotropic photoelectric properties of Cs3Bi2I9, thus contributing to the development of metal halide perovskites in the field of optoelectronics.
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Affiliation(s)
- Qihao Sun
- Key Laboratory of Radiation Detection Materials and Devices, MIIT, School of Materials Science and Engineering & State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China.
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4
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Su J, Zhu T, Pauporté T, Ciofini I, Labat F. Improving the heterointerface in hybrid
organic–inorganic
perovskite solar cells by surface engineering: Insights from periodic hybrid density functional theory calculations. J Comput Chem 2020; 41:1740-1747. [DOI: 10.1002/jcc.26215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/10/2020] [Accepted: 04/14/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Jun Su
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Chemical Theory and Modelling Group Paris France
| | - Tao Zhu
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris (IRCP) Paris France
| | - Thierry Pauporté
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris (IRCP) Paris France
| | - Ilaria Ciofini
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Chemical Theory and Modelling Group Paris France
| | - Frédéric Labat
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Chemical Theory and Modelling Group Paris France
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5
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Fingerprint characterization of M-EDTA complexes and iron compounds using terahertz time-domain spectroscopy. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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6
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Vibronic coherence contributes to photocurrent generation in organic semiconductor heterojunction diodes. Nat Commun 2020; 11:617. [PMID: 32001688 PMCID: PMC6992633 DOI: 10.1038/s41467-020-14476-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 01/09/2020] [Indexed: 11/24/2022] Open
Abstract
Charge separation dynamics after the absorption of a photon is a fundamental process relevant both for photosynthetic reaction centers and artificial solar conversion devices. It has been proposed that quantum coherence plays a role in the formation of charge carriers in organic photovoltaics, but experimental proofs have been lacking. Here we report experimental evidence of coherence in the charge separation process in organic donor/acceptor heterojunctions, in the form of low frequency oscillatory signature in the kinetics of the transient absorption and nonlinear two-dimensional photocurrent spectroscopy. The coherence plays a decisive role in the initial ~200 femtoseconds as we observe distinct experimental signatures of coherent photocurrent generation. This coherent process breaks the energy barrier limitation for charge formation, thus competing with excitation energy transfer. The physics may inspire the design of new photovoltaic materials with high device performance, which explore the quantum effects in the next-generation optoelectronic applications. Although coherent vibrational motion in donor-acceptor blends may contribute to photogeneration generation in organic solar cells (OSCs), proof of a direct correlation is still lacking. Here, the authors report the role of vibrational coherence on photocurrent generation in ternary OSC blends.
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7
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Wolff CM, Caprioglio P, Stolterfoht M, Neher D. Nonradiative Recombination in Perovskite Solar Cells: The Role of Interfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902762. [PMID: 31631441 DOI: 10.1002/adma.201902762] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/19/2019] [Indexed: 05/05/2023]
Abstract
Perovskite solar cells combine high carrier mobilities with long carrier lifetimes and high radiative efficiencies. Despite this, full devices suffer from significant nonradiative recombination losses, limiting their VOC to values well below the Shockley-Queisser limit. Here, recent advances in understanding nonradiative recombination in perovskite solar cells from picoseconds to steady state are presented, with an emphasis on the interfaces between the perovskite absorber and the charge transport layers. Quantification of the quasi-Fermi level splitting in perovskite films with and without attached transport layers allows to identify the origin of nonradiative recombination, and to explain the VOC of operational devices. These measurements prove that in state-of-the-art solar cells, nonradiative recombination at the interfaces between the perovskite and the transport layers is more important than processes in the bulk or at grain boundaries. Optical pump-probe techniques give complementary access to the interfacial recombination pathways and provide quantitative information on transfer rates and recombination velocities. Promising optimization strategies are also highlighted, in particular in view of the role of energy level alignment and the importance of surface passivation. Recent record perovskite solar cells with low nonradiative losses are presented where interfacial recombination is effectively overcome-paving the way to the thermodynamic efficiency limit.
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Affiliation(s)
- Christian M Wolff
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
| | - Pietro Caprioglio
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie, Young Investigator Group Perovskite Tandem Solar Cells, Kekuléstraße 5, 12489, Berlin, Germany
| | - Martin Stolterfoht
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
| | - Dieter Neher
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
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8
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Mondal N, De A, Das S, Paul S, Samanta A. Ultrafast carrier dynamics of metal halide perovskite nanocrystals and perovskite-composites. NANOSCALE 2019; 11:9796-9818. [PMID: 31070653 DOI: 10.1039/c9nr01745c] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Perovskite nanocrystals (NCs), especially those based on cesium lead halides, have emerged in recent years as highly promising materials for efficient solar cells and photonic applications. The key to realization of full potential of these materials lies however in the molecular level understanding of the processes triggered by light. Herein we highlight the knowledge gained from photophysical investigations on these NCs of various sizes and compositions employing primarily the femtosecond pump-probe technique. We show how spectral and temporal characterization of the photo-induced transients provide insight into the mechanism and dynamics of relaxation of hot and thermalized charge carriers through their recombination and trapping. We discuss how the multiple excitons including the charged ones (trions), generated using high pump fluence or photon energy, recombine through the Auger-assisted process. We discussed the harvesting of hot carriers prior to their cooling and band-edge carriers from these perovskite NCs to wide band-gap metal oxides, metal chalcogenide NCs and molecular acceptors. How perovskites can influence the charge carrier dynamics in composites of organic and inorganic semiconductors is also discussed.
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Affiliation(s)
- Navendu Mondal
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India. E-mail:
| | - Apurba De
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India. E-mail:
| | - Somnath Das
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India. E-mail:
| | - Sumanta Paul
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India. E-mail:
| | - Anunay Samanta
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India. E-mail:
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9
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Xu ST, Fan F, Ji YY, Cheng JR, Chang SJ. Terahertz resonance switch induced by the polarization conversion of liquid crystal in compound metasurface. OPTICS LETTERS 2019; 44:2450-2453. [PMID: 31090704 DOI: 10.1364/ol.44.002450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
We experimentally demonstrate an active terahertz (THz) resonance switch induced by the polarization conversion in a compound metasurface, which is a LC layer sandwiched by a metallic wire grating and resonance metamaterial (LCGM). Here, the liquid crystal (LC) plays the role of polarization conversion, which can induce the TE resonance. Moreover, there exists a localized resonance between metallic grating and metamaterial layers, and then the excited resonance will be greatly enhanced. The results show that the high extinction ratio of the resonance switch exceeds 30 dB at 0.82 THz. This work will bring new ideas for the research in developing THz phase, polarization, and switch devices with LC and metasurface.
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10
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Abstract
Spin is an intrinsic quantum mechanical property of fundamental particles including the electron. The spin property is intimately related to electronic and optical properties of molecules and materials. The combination of spin (magnetic), electronic, and optical properties of materials, such as organometal halide perovskites (OMHP), has attracted increasing attention, which has led to a new field termed spin-optotronics based on all three key properties. This growing field has implications in emerging technological applications across disciplines, including photonics, electronics, spintronics, quantum computation, and information storage. This Perspective provides a brief introduction to this field from both experimental and computational aspects, with a focus on the effect of spin on charge carrier dynamics in OMHP, a class of materials with novel properties and promising applications in a number of fields. For instance, recent studies have demonstrated the use of ultrafast laser techniques in probing the fundamental charge carrier dynamics in relation to spin properties. Because of strong spin-orbit coupling (SOC) and broken inversion symmetry that result in Rashba and Dresselhaus effects, OMHP are considered ideal for manipulating spin states for spin-optotronics applications. In the meantime, on the basis of first-principles calculations and effective model Hamiltonians, the Rashba splitting in locally polarized domains can result in spin-forbidden recombination with significantly slow transition rate due to the mismatch of spin and momentum. We summarize the state-of-the-art first-principles methods and their current limitations for ultrafast charge and spin dynamics for realistic solid-state systems in general. To conclude, we note some promising future research and development directions for both experimental and theoretical ultrafast spin dynamics studies of OMHP.
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Affiliation(s)
- Yuan Ping
- Department of Chemistry and Biochemistry , University of California , Santa Cruz , California 95064 , United States
| | - Jin Zhong Zhang
- Department of Chemistry and Biochemistry , University of California , Santa Cruz , California 95064 , United States
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11
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Bretschneider SA, Ivanov I, Wang HI, Miyata K, Zhu X, Bonn M. Quantifying Polaron Formation and Charge Carrier Cooling in Lead-Iodide Perovskites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707312. [PMID: 29847699 DOI: 10.1002/adma.201707312] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/08/2018] [Indexed: 05/06/2023]
Abstract
Notwithstanding the success of lead-halide perovskites in emerging solar energy conversion technologies, many of the fundamental photophysical phenomena in this material remain debated. Here, the initial steps following photogeneration of free charge carriers in lead-iodide perovskites are studied, and timescales of charge carrier cooling and polaron formation, as a function of temperature and charge carrier excess energy, are quantified. It is found, using terahertz time-domain spectroscopy (THz-TDS), that the observed femtosecond rise in the photoconductivity can be described very well using a simple model of sequential charge carrier cooling and polaron formation. For excitation above the bandgap, the carrier cooling time depends on the charge carrier excess energy and lattice temperature, with cooling rates varying between 1 and 6 meV fs-1 , depending on the cation. While carrier cooling depends on the cation, polaron formation occurs within ≈400 fs in CH3 NH3 PbI3 (MAPbI3 ), CH(NH2 )2 PbI3 (FAPbI3 ), and CsPbI3 . Its formation time is independent of temperature between 160 and 295 K. The very similar polaron formation dynamics observed for the three perovskites points to the critical role of the inorganic lattice, rather than the cations, for polaron formation.
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Affiliation(s)
- Simon A Bretschneider
- Molecular Spectroscopy Group, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Max Planck Graduate Center, 55122, Mainz, Germany
| | - Ivan Ivanov
- Molecular Spectroscopy Group, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Hai I Wang
- Molecular Spectroscopy Group, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Kiyoshi Miyata
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Xiaoyang Zhu
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Mischa Bonn
- Molecular Spectroscopy Group, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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12
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Electrical terahertz modulator based on photo-excited ferroelectric superlattice. Sci Rep 2018; 8:2682. [PMID: 29422668 PMCID: PMC5805752 DOI: 10.1038/s41598-018-21095-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 01/29/2018] [Indexed: 11/14/2022] Open
Abstract
The transmission and dielectric spectra of ferroelectric STO/PT superlattice on Si substrate under simultaneous external optical and electric field were investigated and compared at room temperature. Results found that when with an optical field, the electric field realized an effective modulation on the transmission, which displayed a diode property. In addition, a comprehensive model combined with Debye relaxation and Lorentz model was used to analyze the dielectric spectra, variation of the soft mode with external field was put emphasis on exploring.
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13
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Biswas S, Husek J, Baker LR. Elucidating ultrafast electron dynamics at surfaces using extreme ultraviolet (XUV) reflection–absorption spectroscopy. Chem Commun (Camb) 2018; 54:4216-4230. [DOI: 10.1039/c8cc01745j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Time-resolved XUV reflection–absorption spectroscopy probes core-to-valence transitions to reveal state-specific electron dynamics at surfaces.
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14
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Ponseca CS, Chábera P, Uhlig J, Persson P, Sundström V. Ultrafast Electron Dynamics in Solar Energy Conversion. Chem Rev 2017; 117:10940-11024. [DOI: 10.1021/acs.chemrev.6b00807] [Citation(s) in RCA: 211] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Carlito S. Ponseca
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Pavel Chábera
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Jens Uhlig
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Petter Persson
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
| | - Villy Sundström
- Division
of Chemical Physics, Chemical Center, and ‡Theoretical Chemistry Division,
Chemical Center, Lund University, Box 124, Lund SE-221 00, Sweden
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15
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Leng J, Liu J, Zhang J, Jin S. Decoupling Interfacial Charge Transfer from Bulk Diffusion Unravels Its Intrinsic Role for Efficient Charge Extraction in Perovskite Solar Cells. J Phys Chem Lett 2016; 7:5056-5061. [PMID: 27973883 DOI: 10.1021/acs.jpclett.6b02309] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In a perovskite solar cell, the overall photoinduced charge-transfer (CT) process comprises both charge diffusion through the bulk to perovskite/electrode interfaces and interfacial electron and hole transfer to electrodes. In this study, we decoupled these two entangled processes by investigating the film thickness-dependent CT dynamics from CH3NH3PbI3 perovskites to [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) (electron acceptor) and spiro-OMeTAD (hole acceptor). By fitting ultrafast transient absorption kinetics to an explicit "diffusion-coupled charge-transfer" model, we found that the charge diffusion from the film interior to perovskite/electrode interfaces took ∼200 ps to a few nanoseconds, depending on the thickness of perovskite film; the subsequent interfacial charge transfer was ultrafast, ∼6 ps for electron transfer to PCBM and ∼8 ps for hole transfer to spiro-OMeTAD, and led to efficient charge extraction (>90%) to electrodes in a 400 nm thick film. Our results indicate that the picosecond interfacial charge transfer is a key to high-performance perovskite solar cells.
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Affiliation(s)
- Jing Leng
- State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Junxue Liu
- State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , 66 Changjiang West Road, Huangdao District, Qingdao 266580, China
| | - Jun Zhang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , 66 Changjiang West Road, Huangdao District, Qingdao 266580, China
| | - Shengye Jin
- State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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16
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Panigrahi S, Calmeiro T, Martins R, Nunes D, Fortunato E. Observation of Space Charge Dynamics Inside an All Oxide Based Solar Cell. ACS NANO 2016; 10:6139-6146. [PMID: 27244449 DOI: 10.1021/acsnano.6b02090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The charge transfer dynamics at interfaces are fundamental to know the mechanism of photovoltaic processes. The internal potential in solar cell devices depends on the basic processes of photovoltaic effect such as charge carrier generation, separation, transport, recombination, etc. Here we report the direct observation of the surface potential depth profile over the cross-section of the ZnO nanorods/Cu2O based solar cell for two different layer thicknesses at different wavelengths of light using Kelvin probe force microscopy. The topography and phase images across the cross-section of the solar cell are also observed, where the interfaces are well-defined on the nanoscale. The potential profiling results demonstrate that under white light illumination, the photoinduced electrons in Cu2O inject into ZnO due to the interfacial electric field, which results in the large difference in surface potential between two active layers. However, under a single wavelength illumination, the charge carrier generation, separation, and transport processes between two active layers are limited, which affect the surface potential images and corresponding potential depth profile. Because of changes in the active layer thicknesses, small variations have been observed in the charge carrier transport mechanism inside the device. These results provide the clear idea about the charge carrier distribution inside the solar cell in different conditions and show the perfect illumination condition for large carrier transport in a high performance solar cell.
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Affiliation(s)
- Shrabani Panigrahi
- Departamento de Ciência dos Materiais, CENIMAT/i3N, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa and CEMOP/Uninova , 2829-516 Caparica, Portugal
| | - Tomás Calmeiro
- Departamento de Ciência dos Materiais, CENIMAT/i3N, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa and CEMOP/Uninova , 2829-516 Caparica, Portugal
| | - Rodrigo Martins
- Departamento de Ciência dos Materiais, CENIMAT/i3N, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa and CEMOP/Uninova , 2829-516 Caparica, Portugal
| | - Daniela Nunes
- Departamento de Ciência dos Materiais, CENIMAT/i3N, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa and CEMOP/Uninova , 2829-516 Caparica, Portugal
| | - Elvira Fortunato
- Departamento de Ciência dos Materiais, CENIMAT/i3N, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa and CEMOP/Uninova , 2829-516 Caparica, Portugal
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17
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Manser JS, Christians JA, Kamat PV. Intriguing Optoelectronic Properties of Metal Halide Perovskites. Chem Rev 2016; 116:12956-13008. [DOI: 10.1021/acs.chemrev.6b00136] [Citation(s) in RCA: 1067] [Impact Index Per Article: 133.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joseph S. Manser
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jeffrey A. Christians
- Radiation
Laboratory, 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 Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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18
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Affiliation(s)
- Joseph S. Manser
- Radiation
Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jeffrey A. Christians
- Radiation
Laboratory, 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 Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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Corani A, Li MH, Shen PS, Chen P, Guo TF, El Nahhas A, Zheng K, Yartsev A, Sundström V, Ponseca CS. Ultrafast Dynamics of Hole Injection and Recombination in Organometal Halide Perovskite Using Nickel Oxide as p-Type Contact Electrode. J Phys Chem Lett 2016; 7:1096-101. [PMID: 26942559 DOI: 10.1021/acs.jpclett.6b00238] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
There is a mounting effort to use nickel oxide (NiO) as p-type selective electrode for organometal halide perovskite-based solar cells. Recently, an overall power conversion efficiency using this hole acceptor has reached 18%. However, ultrafast spectroscopic investigations on the mechanism of charge injection as well as recombination dynamics have yet to be studied and understood. Using time-resolved terahertz spectroscopy, we show that hole transfer is complete on the subpicosecond time scale, driven by the favorable band alignment between the valence bands of perovskite and NiO nanoparticles (NiO(np)). Recombination time between holes injected into NiO(np) and mobile electrons in the perovskite material is shown to be hundreds of picoseconds to a few nanoseconds. Because of the low conductivity of NiO(np), holes are pinned at the interface, and it is electrons that determine the recombination rate. This recombination competes with charge collection and therefore must be minimized. Doping NiO to promote higher mobility of holes is desirable in order to prevent back recombination.
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Affiliation(s)
- Alice Corani
- Division of Chemical Physics, Lund University , Box 124, 221 00 Lund, Sweden
| | - Ming-Hsien Li
- Department of Photonics, National Cheng Kung University , Tainan, Taiwan 701
| | - Po-Shen Shen
- Department of Photonics, National Cheng Kung University , Tainan, Taiwan 701
| | - Peter Chen
- Department of Photonics, National Cheng Kung University , Tainan, Taiwan 701
- Research Center for Energy Technology and Strategy (RCETS), Tainan, Taiwan 701
- Advanced Optoelectronic Technology Center (AOTC), Tainan, Taiwan 701
| | - Tzung-Fang Guo
- Department of Photonics, National Cheng Kung University , Tainan, Taiwan 701
- Research Center for Energy Technology and Strategy (RCETS), Tainan, Taiwan 701
- Advanced Optoelectronic Technology Center (AOTC), Tainan, Taiwan 701
| | - Amal El Nahhas
- Division of Chemical Physics, Lund University , Box 124, 221 00 Lund, Sweden
| | - Kaibo Zheng
- Division of Chemical Physics, Lund University , Box 124, 221 00 Lund, Sweden
| | - Arkady Yartsev
- Division of Chemical Physics, Lund University , Box 124, 221 00 Lund, Sweden
| | - Villy Sundström
- Division of Chemical Physics, Lund University , Box 124, 221 00 Lund, Sweden
| | - Carlito S Ponseca
- Division of Chemical Physics, Lund University , Box 124, 221 00 Lund, Sweden
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