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Over 1000 nm photoresponse with cyclopentadithiophene-based non-fullerene acceptors for efficient organic solar cells. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Van Landeghem M, Lenaerts R, Kesters J, Maes W, Goovaerts E. Impact of the donor polymer on recombination via triplet excitons in a fullerene-free organic solar cell. Phys Chem Chem Phys 2019; 21:22999-23008. [PMID: 31599899 DOI: 10.1039/c9cp03793d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The greater chemical tunability of non-fullerene acceptors enables fine-tuning of the donor-acceptor energy level offsets, a promising strategy towards increasing the open-circuit voltage in organic solar cells. Unfortunately, this approach could open an additional recombination channel for the charge-transfer (CT) state via a lower-lying donor or acceptor triplet level. In this work we investigate such electron and hole back-transfer mechanisms in fullerene-free solar cells incorporating the novel molecular acceptor 2,4-diCN-Ph-DTTzTz. The transition to the low-driving force regime is studied by comparing blends with well-established donor polymers P3HT and MDMO-PPV, which allows for variation of the energetic offsets at the donor-acceptor interface. Combining various optical spectroscopic techniques, the CT process and subsequent triplet formation are systematically investigated. Although both back-transfer mechanisms are found to be energetically feasible in both blends, markedly different triplet-mediated recombination processes are observed for the two systems. The kinetic suppression of electron back-transfer in the blend with P3HT suggests that energy losses due to triplet formation on the polymer can be avoided, regardless of favorable energetic alignment.
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Affiliation(s)
- Melissa Van Landeghem
- Physics Department, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium.
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3
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Inganäs O. Organic Photovoltaics over Three Decades. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1800388. [PMID: 29938847 DOI: 10.1002/adma.201800388] [Citation(s) in RCA: 235] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/20/2018] [Indexed: 05/20/2023]
Abstract
The development of organic semiconductors for photovoltaic devices, over the last three decades, has led to unexpected performance for an alternative choice of materials to convert sunlight to electricity. New materials and developed concepts have improved the photovoltage in organic photovoltaic devices, where records are now found above 13% power conversion efficiency in sunlight. The author has stayed with the topic of organic materials for energy conversion and energy storage during these three decades, and makes use of the Hall of Fame now built by Advanced Materials, to present his view of the path travelled over this time, including motivations, personalities, and ambitions.
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Affiliation(s)
- Olle Inganäs
- Biomolecular and Organic Electronics, Department of Physics, Chemistry and Biology (IFM), Linköping University, S-581 83, Linköping, Sweden
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4
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O'Hara KA, Ostrowski DP, Koldemir U, Takacs CJ, Shaheen SE, Sellinger A, Chabinyc ML. Role of Crystallization in the Morphology of Polymer:Non-fullerene Acceptor Bulk Heterojunctions. ACS APPLIED MATERIALS & INTERFACES 2017; 9:19021-19029. [PMID: 28530404 DOI: 10.1021/acsami.7b03529] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Many high efficiency organic photovoltaics use fullerene-based acceptors despite their high production cost, weak optical absorption in the visible range, and limited synthetic variability of electronic and optical properties. To circumvent this deficiency, non-fullerene small-molecule acceptors have been developed that have good synthetic flexibility, allowing for precise tuning of optoelectronic properties, leading to enhanced absorption of the solar spectrum and increased open-circuit voltages (VOC). We examined the detailed morphology of bulk heterojunctions of poly(3-hexylthiophene) and the small-molecule acceptor HPI-BT to reveal structural changes that lead to improvements in the fill factor of solar cells upon thermal annealing. The kinetics of the phase transformation process of HPI-BT during thermal annealing were investigated through in situ grazing incidence wide-angle X-ray scattering studies, atomic force microscopy, and transmission electron microscopy. The HPI-BT acceptor crystallizes during film formation to form micron-sized domains embedded within the film center and a donor rich capping layer at the cathode interface reducing efficient charge extraction. Thermal annealing changes the surface composition and improves charge extraction. This study reveals the need for complementary methods to investigate the morphology of BHJs.
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Affiliation(s)
- Kathryn A O'Hara
- Materials Department, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | - David P Ostrowski
- National Renewable Energy Laboratory (NREL) , Golden, Colorado 80401, United States
| | - Unsal Koldemir
- Department of Chemistry, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Christopher J Takacs
- Materials Department, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | | | - Alan Sellinger
- Department of Chemistry, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Michael L Chabinyc
- Materials Department, University of California Santa Barbara , Santa Barbara, California 93106, United States
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Viswanathan VN, Rao AD, Pandey UK, Kesavan AV, Ramamurthy PC. Molecular-level architectural design using benzothiadiazole-based polymers for photovoltaic applications. Beilstein J Org Chem 2017; 13:863-873. [PMID: 28546844 PMCID: PMC5433161 DOI: 10.3762/bjoc.13.87] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Accepted: 04/06/2017] [Indexed: 11/23/2022] Open
Abstract
A series of low band gap, planar conjugated polymers, P1 (PFDTBT), P2 (PFDTDFBT) and P3 (PFDTTBT), based on fluorene and benzothiadiazole, was synthesized. The effect of fluorine substitution and fused aromatic spacers on the optoelectronic and photovoltaic performance was studied. The polymer, derived from dithienylated benzothiodiazole and fluorene, P1, exhibited a highest occupied molecular orbital (HOMO) energy level at -5.48 eV. Density functional theory (DFT) studies as well as experimental measurements suggested that upon substitution of the acceptor with fluorine, both the HOMO and lowest unoccupied molecular orbital (LUMO) energy levels of the resulting polymer, P2, were lowered, leading to a higher open circuit voltage and short circuit current with an overall improvement of more than 110% for the photovoltaic devices. Moreover, a decrease in the torsion angle between the units was also observed for the fluorinated polymer P2 due to the enhanced electrostatic interaction between the fluorine substituents and sulfur atoms, leading to a high hole mobility. The use of a fused π-bridge in polymer P3 for the enhancement of the planarity as compared to the P1 backbone was also studied. This enhanced planarity led to the highest observed mobility among the reported three polymers as well as to an improvement in the device efficiency by more than 40% for P3.
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Affiliation(s)
- Vinila N Viswanathan
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India
| | - Arun D Rao
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India
| | - Upendra K Pandey
- Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore, Karnataka, India
| | - Arul Varman Kesavan
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India
| | - Praveen C Ramamurthy
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India.,Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore, Karnataka, India
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Kang H, Kim G, Kim J, Kwon S, Kim H, Lee K. Bulk-Heterojunction Organic Solar Cells: Five Core Technologies for Their Commercialization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:7821-7861. [PMID: 27345936 DOI: 10.1002/adma.201601197] [Citation(s) in RCA: 147] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/21/2016] [Indexed: 05/19/2023]
Abstract
The past two decades of vigorous interdisciplinary approaches has seen tremendous breakthroughs in both scientific and technological developments of bulk-heterojunction organic solar cells (OSCs) based on nanocomposites of π-conjugated organic semiconductors. Because of their unique functionalities, the OSC field is expected to enable innovative photovoltaic applications that can be difficult to achieve using traditional inorganic solar cells: OSCs are printable, portable, wearable, disposable, biocompatible, and attachable to curved surfaces. The ultimate objective of this field is to develop cost-effective, stable, and high-performance photovoltaic modules fabricated on large-area flexible plastic substrates via high-volume/throughput roll-to-roll printing processing and thus achieve the practical implementation of OSCs. Recently, intensive research efforts into the development of organic materials, processing techniques, interface engineering, and device architectures have led to a remarkable improvement in power conversion efficiencies, exceeding 11%, which has finally brought OSCs close to commercialization. Current research interests are expanding from academic to industrial viewpoints to improve device stability and compatibility with large-scale printing processes, which must be addressed to realize viable applications. Here, both academic and industrial issues are reviewed by highlighting historically monumental research results and recent state-of-the-art progress in OSCs. Moreover, perspectives on five core technologies that affect the realization of the practical use of OSCs are presented, including device efficiency, device stability, flexible and transparent electrodes, module designs, and printing techniques.
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Affiliation(s)
- Hongkyu Kang
- School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, GIST-ICL International Collaboration R&D Centre, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Geunjin Kim
- School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, GIST-ICL International Collaboration R&D Centre, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Junghwan Kim
- School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, GIST-ICL International Collaboration R&D Centre, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Sooncheol Kwon
- School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, GIST-ICL International Collaboration R&D Centre, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea
| | - Heejoo Kim
- School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, GIST-ICL International Collaboration R&D Centre, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
| | - Kwanghee Lee
- School of Materials Science and Engineering, Research Institute for Solar and Sustainable Energies, GIST-ICL International Collaboration R&D Centre, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
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Wang S, Ryan JW, Singh A, Beirne JG, Palomares E, Redmond G. Encapsulation of MEH-PPV:PCBM Hybrids in the Cores of Block Copolymer Micellar Assemblies: Photoinduced Electron Transfer in a Nanoscale Donor-Acceptor System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:329-337. [PMID: 26653672 DOI: 10.1021/acs.langmuir.5b04053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The objective of this work is to demonstrate that conjugated polymer:fullerene hybrid nanoparticles encapsulated in the hydrophobic cores of triblock copolymer micelles may successfully act as spatially confined donor-acceptor systems capable of facilitating photoinduced charge carrier separation. To this end, aqueous dispersions of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) nanoparticles were first prepared by solubilization of the polymer in the cores of poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) triblock copolymer, Pluronic F-127 micelles. A number of significant optical spectroscopic changes were observed on transfer of the conjugated polymer from a nonaqueous solvent to the aqueous micellar environment. These were primarily attributed to increased interchain interactions due to conjugated polymer chain collapse during encapsulation in the micellar cores. When prepared in buffer solution, the micelles exhibited good long-term collodial stability. When MEH-PPV micelles were blended by the addition of controlled amounts of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), the observed correspondence of photoluminescence emission quenching, quantum yield decreases, and emission lifetime shortening with increasing PCBM concentration indicated efficient photoinduced donor-to-acceptor charge transfer between MEH-PPV and the fullerenes in the cores of the micelles, an assignment that was confirmed by transient absorption spectroscopic monitoring of carrier photogeneration and recombination.
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Affiliation(s)
- Suxiao Wang
- School of Chemistry, University College Dublin , Belfield, Dublin 4, Ireland
| | - James William Ryan
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Amita Singh
- School of Chemistry, University College Dublin , Belfield, Dublin 4, Ireland
| | - Jason Gerard Beirne
- School of Chemistry, University College Dublin , Belfield, Dublin 4, Ireland
| | - Emilio Palomares
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007 Tarragona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | - Gareth Redmond
- School of Chemistry, University College Dublin , Belfield, Dublin 4, Ireland
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Gao F, Inganäs O. Charge generation in polymer-fullerene bulk-heterojunction solar cells. Phys Chem Chem Phys 2014; 16:20291-304. [PMID: 24994122 DOI: 10.1039/c4cp01814a] [Citation(s) in RCA: 169] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Charge generation in organic solar cells is a fundamental yet heavily debated issue. This article gives a balanced review of different mechanisms proposed to explain efficient charge generation in polymer-fullerene bulk-heterojunction solar cells. We discuss the effect of charge-transfer states, excess energy, external electric field, temperature, disorder of the materials, and delocalisation of the charge carriers on charge generation. Although a general consensus has not been reached yet, recent findings, based on both steady-state and transient measurements, have significantly advanced our understanding of this process.
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Affiliation(s)
- Feng Gao
- Biomolecular and Organic Electronics, IFM and Center of Organic Electronics, Linköping University, Linköping SE-581 83, Sweden.
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9
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Instability of Contact Resistance in MEMS and NEMS DC Switches under Low Force: the Role of Alien Films on the Contact Surface. SENSORS 2013. [PMCID: PMC3892830 DOI: 10.3390/s131216360] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The metal contact is one of the most crucial parts in ohmic-contact microelectromechanical (MEMS) switches, as it determines the device performance and reliability. It has been observed that there is contact instability when the contact force is below a threshold value (minimum contact force). However, there has been very limited knowledge so far about the unstable electrical contact behavior under low contact force. In this work, the instability of Au-Au micro/nano-contact behavior during the initial stage of contact formation is comprehensively investigated for the first time. It has been found that the alien film on the contact surface plays a critical role in determining the contact behavior at the initial contact stage under low contact force. A strong correlation between contact resistance fluctuation at the initial contact stage and the presence of a hydrocarbon alien film on the contact surface is revealed. The enhancement of contact instability due to the alien film can be explained within a framework of trap-assisted tunneling.
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10
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Brinkhaus L, Katsukis G, Malig J, Costa RD, Garcia-Iglesias M, Vázquez P, Torres T, Guldi DM. Tuning the stability of graphene layers by phthalocyanine-based oPPV oligomers towards photo- and redoxactive materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2348-2357. [PMID: 23418045 DOI: 10.1002/smll.201202427] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 12/25/2012] [Indexed: 06/01/2023]
Abstract
In contrast to pristine zinc phthalocyanine (1), zinc phthalocyanine based oPPV-oligomers (2-4) of different chain lengths interact tightly and reversibly with graphite, affording stable and finely dispersed suspensions of mono- to few-layer graphene-nanographene (NG)-that are photoactive. The p-type character of the oPPV backbones and the increasing length of the oPPV backbones facilitate the overall π-π interactions with the graphene layers. In NG/2, NG/3, and NG/4 hybrids, strong electronic coupling between the individual components gives rise to charge transfer from the photoexcited zinc phthalocyanines to NG to form hundreds of picoseconds lived charge transfer states. The resulting features, namely photo- and redoxactivity, serve as incentives to construct and to test novel solar cells. Solar cells made out of NG/4 feature stable and repeatable photocurrent generation during several 'on-off' cycles of illumination with monochromatic IPCE values of around 1%.
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Affiliation(s)
- Linda Brinkhaus
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
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11
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Guide M, Pla S, Sharenko A, Zalar P, Fernández-Lázaro F, Sastre-Santos Á, Nguyen TQ. A structure–property–performance investigation of perylenediimides as electron accepting materials in organic solar cells. Phys Chem Chem Phys 2013; 15:18894-9. [DOI: 10.1039/c3cp53552e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Zhang W, Zhao NJ, Huo MM, Fu LM, Ai XC, Zhang JP. Subnanosecond charge recombination dynamics in P3HT/PC61BM films. Molecules 2012; 17:13923-36. [PMID: 23178308 PMCID: PMC6268940 DOI: 10.3390/molecules171213923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 11/09/2012] [Accepted: 11/16/2012] [Indexed: 11/16/2022] Open
Abstract
Ultrafast near-infrared absorption spectroscopy was used to investigate the influence of film morphology and excitation photon energy on the charge recombination (CR) dynamics in the initial nanosecond timescale in the P3HT/PC(61)BM blend films. With reference to the CS(2)-cast films, the solvent vapor annealed (SVA) ones show 2–3-fold improvement in hole mobility and more than 5-fold reduction in the polymer-localized trap states of holes. At Dt = 70 ps, the hole mobility (m(h)) and the bimolecular CR rate (γ(bi)) of the SVA films are μ(h) = 8.7 × 10(−4) cm2 × s(−1) × V(−1) and γ(bi) = 4.5 × 10(−10) cm3 × s(−1), whereas at Δt = 1 ns they drop to 8.7 × 10(−5) cm2 × s(−1) × V(−1) and 4.6 × 10(−11) cm3 × s(−1), respectively. In addition, upon increasing the hole concentration, the hole mobility increases substantially faster under the above-gap photoexcitation than it does under the band-gap photoexcitation, irrespective of the film morphologies. The results point to the importance of utilizing the photogenerated free charges in the early timescales.
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Affiliation(s)
- Wei Zhang
- Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
- Department of Chemistry, Renmin University of China, Beijing 100872, China; (N.-J.Z.); (M.-M.H.); (L.-M.F.); (X.-C.A.)
| | - Ning-Jiu Zhao
- Department of Chemistry, Renmin University of China, Beijing 100872, China; (N.-J.Z.); (M.-M.H.); (L.-M.F.); (X.-C.A.)
| | - Ming-Ming Huo
- Department of Chemistry, Renmin University of China, Beijing 100872, China; (N.-J.Z.); (M.-M.H.); (L.-M.F.); (X.-C.A.)
| | - Li-Min Fu
- Department of Chemistry, Renmin University of China, Beijing 100872, China; (N.-J.Z.); (M.-M.H.); (L.-M.F.); (X.-C.A.)
| | - Xi-Cheng Ai
- Department of Chemistry, Renmin University of China, Beijing 100872, China; (N.-J.Z.); (M.-M.H.); (L.-M.F.); (X.-C.A.)
| | - Jian-Ping Zhang
- Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
- Department of Chemistry, Renmin University of China, Beijing 100872, China; (N.-J.Z.); (M.-M.H.); (L.-M.F.); (X.-C.A.)
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Dai L, Chang DW, Baek JB, Lu W. Carbon nanomaterials for advanced energy conversion and storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:1130-66. [PMID: 22383334 DOI: 10.1002/smll.201101594] [Citation(s) in RCA: 550] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Revised: 11/03/2011] [Indexed: 05/19/2023]
Abstract
It is estimated that the world will need to double its energy supply by 2050. Nanotechnology has opened up new frontiers in materials science and engineering to meet this challenge by creating new materials, particularly carbon nanomaterials, for efficient energy conversion and storage. Comparing to conventional energy materials, carbon nanomaterials possess unique size-/surface-dependent (e.g., morphological, electrical, optical, and mechanical) properties useful for enhancing the energy-conversion and storage performances. During the past 25 years or so, therefore, considerable efforts have been made to utilize the unique properties of carbon nanomaterials, including fullerenes, carbon nanotubes, and graphene, as energy materials, and tremendous progress has been achieved in developing high-performance energy conversion (e.g., solar cells and fuel cells) and storage (e.g., supercapacitors and batteries) devices. This article reviews progress in the research and development of carbon nanomaterials during the past twenty years or so for advanced energy conversion and storage, along with some discussions on challenges and perspectives in this exciting field.
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Affiliation(s)
- Liming Dai
- Center of Advanced Science and Engineering for Carbon, Case4Carbon, Department of Macromolecular Science and Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
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Rodríguez-Córdoba W, Sierra CA, Ochoa Puentes C, Lahti PM, Peon J. Photoinduced Energy Transfer in Bichromophoric Pyrene–PPV Oligomer Systems: The Role of Flexible Donor–Acceptor Bridges. J Phys Chem B 2012; 116:3490-503. [DOI: 10.1021/jp208602q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- William Rodríguez-Córdoba
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad
Universitaria, 04510, México, D.F., México
| | - Cesar A. Sierra
- Universidad Nacional de Colombia, Departamento de Química,
Bogotá AA 14490, Colombia
| | | | - Paul M. Lahti
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts
01003, United States
| | - Jorge Peon
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad
Universitaria, 04510, México, D.F., México
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15
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Nevil N, Ling Y, Mierloo SV, Kesters J, Piersimoni F, Adriaensens P, Lutsen L, Vanderzande D, Manca J, Maes W, Doorslaer SV, Goovaerts E. Charge transfer in the weak driving force limit in blends of MDMO-PPV and dithienylthiazolo[5,4-d]thiazoles towards organic photovoltaics with high VOC. Phys Chem Chem Phys 2012; 14:15774-84. [DOI: 10.1039/c2cp42399e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Jancar J, Douglas J, Starr F, Kumar S, Cassagnau P, Lesser A, Sternstein S, Buehler M. Current issues in research on structure–property relationships in polymer nanocomposites. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.04.074] [Citation(s) in RCA: 530] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Miller SA, Moran AM. Nonlinear Optical Detection of Electron Transfer Adiabaticity in Metal Polypyridyl Complexes. J Phys Chem A 2010; 114:2117-26. [DOI: 10.1021/jp9092145] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen A. Miller
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Andrew M. Moran
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
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18
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Kanai Y, Wu Z, Grossman JC. Charge separation in nanoscale photovoltaic materials: recent insights from first-principles electronic structure theory. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b913277p] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Liu HA, Zepeda D, Ferraris JP, Balkus KJ. Electrospinning of poly(alkoxyphenylenevinylene) and methanofullerene nanofiber blends. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1958-1965. [PMID: 20355820 DOI: 10.1021/am900338w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Poly(p-phenylenevinylene) (PPV) derivatives have long been studied because of their attractive opto- and electroluminescent properties and have potential applications for devices such as light-emitting diodes and photovoltaics. The ability to induce alignment of these PPV derivatives may lead to the enhancement of charge mobility and their efficiency. In this study, uniform nanofibers of poly[2,5-(2'-ethylhexyloxy)]-1,4-phenylenevinylene (BEH-PPV) have been fabricated through the method of electrospinning, and an induced alignment of the polymer fibers was observed through photoluminescence data. This study also focuses on the doping of these fibers with the fullerene derivative, 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)-C(61) (PCBM), to induce more incidence of donor/acceptor junctions. Composite fibers with up to a 1:2 weight ratio of PCBM/BEH-PPV have been fabricated and exhibited an ability to quench the photoluminescence of BEH-PPV, indicative of charge transfer.
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Affiliation(s)
- Harvey A Liu
- Department of Chemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, USA
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Pensack RD, Banyas KM, Barbour LW, Hegadorn M, Asbury JB. Ultrafast vibrational spectroscopy of charge-carrier dynamics in organic photovoltaic materials. Phys Chem Chem Phys 2009; 11:2575-91. [DOI: 10.1039/b817113k] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cid JJ, Ehli C, Atienza-Castellanos C, Gouloumis A, Maya EM, Vázquez P, Torres T, Guldi DM. Synthesis, photophysical and electrochemical characterization of phthalocyanine-based poly(p-phenylenevinylene) oligomers. Dalton Trans 2009:3955-63. [DOI: 10.1039/b818772j] [Citation(s) in RCA: 18] [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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22
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Castro FA, Benmansour H, Moser JE, Graeff CFO, Nüesch F, Hany R. Photoinduced hole-transfer in semiconducting polymer/low-bandgap cyanine dye blends: evidence for unit charge separation quantum yield. Phys Chem Chem Phys 2009; 11:8886-94. [DOI: 10.1039/b909512h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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McFarland SA, Cheng KAWY, Lee FS, Cozens FL, Schepp NP. Nonthermalized excited states in Ru(II) polypyridyl complexes probed by ultrafast transient absorption spectroscopy with high photon energy excitation. CAN J CHEM 2008. [DOI: 10.1139/v08-161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The picosecond excited state dynamics of a series of homoleptic Ru(II) polypyridyl complexes (where LL = bpy, dmb, dmeob, dfmb, or dttb) have been investigated in aqueous solution at room temperature using femtosecond transient absorption spectroscopy with high photon energy excitation. All of the complexes studied produced similar spectroscopic signatures: a near-instantaneous bleach centered at 470–500 nm corresponding to the static absorption spectrum, as well as an intense absorption (475–650 nm) that decayed within the instrument response function (IRF) to form a broad, low-level absorption extending from 500–650 nm. Detailed analyses of both kinetic and spectral parameters by singular value decomposition (SVD) indicate that the excited state difference spectra contain contributions from at least three distinguishable species that have been assigned as ligand-based π* ← π* and ligand-to-metal-charge-transfer (LMCT) transitions concomitant with the loss of the ground state metal-to-ligand-charge-transfer (MLCT) transition. Kinetic information extracted at 530 nm (an optical marker for the fully intraligand-delocalized 3MLCT state) or 660 nm (LMCT transitions) appear to be biphasic in some cases with the amplitude of the IRF-limited component becoming larger with shorter wavelength excitation. Further, rise dynamics were observed at redder probe wavelengths for Ru(bpy)32+ and Ru(dttb)32+. These observations are different from those obtained using lower photon energy excitation and show that excitation wavelength strongly influences the early photophysical events in these Ru(II) complexes.Key words: ruthenium, photophysics, lasers, transient absorption spectroscopy, excited states, singular value decomposition (SVD).
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Zakrzewski VG, Dolgounitcheva O, Ortiz JV. Electron propagator calculations on C60 and C70 photoelectron spectra. J Chem Phys 2008; 129:104306. [DOI: 10.1063/1.2976789] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Gondek E, Kityk IV, Danel A, Sanetra J. Photovoltaic response and values of state dipole moments in single-layered pyrazoloquinoline/polymer composites. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:117-21. [PMID: 17728177 DOI: 10.1016/j.saa.2007.07.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 07/09/2007] [Accepted: 07/11/2007] [Indexed: 05/17/2023]
Abstract
We report the photovoltaic response of composite films formed by polymer transport matrices poly(3-octylthiophene) (P3OT) and poly(3-decylthiophene) (PDT) with incorporated 1H-pyrazolo[3,4-b]quinoline (PAQ) chromophore (see the first figure). The photovoltage (PV) data were obtained for different substituted PAQ possessing different state dipole moments. The photovoltaic cells were formed between ITO and aluminum electrodes. We found that the PV signal of polymer/PAQ substantially depends on the state dipole moments of the pyrazoloquinoline chromophore. This fact indicates on a possibility of significant enhancement of PV efficiency by appropriate variations of the state dipole moments of chromophore. This results in photoinduced electron transfer from polymer serving as donors to PAQ being the electron acceptor. Despite an efficiency of the PV devices is below 1%, however, it may be substantially enhanced in future varying the chromophore state dipole moments appropriately.
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Affiliation(s)
- E Gondek
- Institute of Physics, Technical University of Cracow, Podchrazych 1, Krakow, Poland
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Barbour LW, Hegadorn M, Asbury JB. Watching Electrons Move in Real Time: Ultrafast Infrared Spectroscopy of a Polymer Blend Photovoltaic Material. J Am Chem Soc 2007; 129:15884-94. [DOI: 10.1021/ja074657x] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Larry W. Barbour
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - Maureen Hegadorn
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
| | - John B. Asbury
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802
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Wahadoszamen M, Nakabayashi T, Kang S, Imahori H, Ohta N. External electric field effects on absorption and fluorescence spectra of a fullerene derivative and its mixture with zinc-tetraphenylporphyrin doped in a PMMA film. J Phys Chem B 2007; 110:20354-61. [PMID: 17034218 DOI: 10.1021/jp0635967] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Electroabsorption and electrofluorescence spectra of a fullerene derivative, C60(C18)2, and its mixture with zinc-tetraphenylporphyrin (ZnTPP) have been measured by using electric field modulation spectroscopy. The change in dipole moment is significant in the electroabsorption spectra both of C60(C18)2 and of a complex composed of C60(C18)2 and ZnTPP, indicating that the excited states both of C60(C18)2 and of a complex between C60(C18)2 and ZnTPP have a large charge-transfer character. The fluorescence quantum yield of C60(C18)2 decreases in the presence of an electric field, which probably arises from the field-induced acceleration of the intramolecular nonradiative process of C60(C18)2 in the fluorescent state. In a mixture between ZnTPP and C60(C18)2, electrofluorescence spectra show the field-induced enhancement for the fluorescence of ZnTPP and the field-induced de-enhancement for the fluorescence both of C60(C18)2 and of the complex between ZnTPP and C60(C18)2. A theoretical analysis clearly shows that the field-induced enhancement of the ZnTPP fluorescence in a mixture results from the field-induced deceleration of the rate of the electron transfer from the excited ZnTPP to C60(C18)2. The standard free energy gap for the photoinduced electron-transfer process is estimated based on the theoretical simulation of the field-dependent fluorescence intensity.
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Affiliation(s)
- Md Wahadoszamen
- Research Institute for Electronic Science (RIES), Hokkaido University, Sapporo 060-0812, Japan
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Kanai Y, Grossman JC. Insights on interfacial charge transfer across P3HT/fullerene photovoltaic heterojunction from Ab initio calculations. NANO LETTERS 2007; 7:1967-72. [PMID: 17547466 DOI: 10.1021/nl0707095] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The interfacial charge-transfer mechanism of the P3HT/fullerene photovoltaic heterojunction is elucidated using density functional theory calculations. Our findings indicate that an efficient adiabatic electron transfer is highly probable due to the presence of an extended electronic state that has a significant probability distribution across the interface in the lowest excited state. Furthermore, efficient exciton dissociation is possible because this bridging state has significant overlap with near-degenerate unoccupied states that are localized on the fullerene.
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Affiliation(s)
- Yosuke Kanai
- Berkeley Nanosciences and Nanoengineering Institute and Center of Integrated Nanomechanical Systems, University of California, Berkeley, California 94720, USA.
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29
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Peet J, Kim JY, Coates NE, Ma WL, Moses D, Heeger AJ, Bazan GC. Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols. NATURE MATERIALS 2007; 6:497-500. [PMID: 17529968 DOI: 10.1038/nmat1928] [Citation(s) in RCA: 1411] [Impact Index Per Article: 83.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2007] [Accepted: 05/03/2007] [Indexed: 05/08/2023]
Abstract
High charge-separation efficiency combined with the reduced fabrication costs associated with solution processing and the potential for implementation on flexible substrates make 'plastic' solar cells a compelling option for tomorrow's photovoltaics. Attempts to control the donor/acceptor morphology in bulk heterojunction materials as required for achieving high power-conversion efficiency have, however, met with limited success. By incorporating a few volume per cent of alkanedithiols in the solution used to spin-cast films comprising a low-bandgap polymer and a fullerene derivative, the power-conversion efficiency of photovoltaic cells (air-mass 1.5 global conditions) is increased from 2.8% to 5.5% through altering the bulk heterojunction morphology. This discovery can potentially enable morphological control in bulk heterojunction materials where thermal annealing is either undesirable or ineffective.
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Affiliation(s)
- J Peet
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, California 93106, USA
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30
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Toivonen TLJ, Hukka TI. A Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TDDFT) Study on Optical Transitions in Oligo(p-phenylenevinylene)−Fullerene Dyads and the Applicability to Resonant Energy Transfer. J Phys Chem A 2007; 111:4821-8. [PMID: 17477511 DOI: 10.1021/jp068413v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The optical transitions of three different size oligo(p-phenylenevinylene)-fullerene dyads (OPV(n)-MPC(60); n = 2-4) and of the corresponding separate molecules are studied using density functional theory (DFT) and time-dependent density functional theory. The DFT is used to determine the geometries and the electronic structures of the ground states. Transition energies and excited-state structures are obtained from the TDDFT calculations. Resonant energy transfer from OPV(n) to MPC(60) is also studied and the Fermi golden rule is used, along with two simple models to describe the electronic coupling to calculate the energy transfer rates. The hybrid-type PBE0 functional is used with a split-valence basis set augmented with a polarization function (SV(P)) in calculations and the calculated results are compared to the corresponding experimental results. The calculated PBE0 spectra of the OPV(n)-MPC(60) dyads correspond to the experimental spectra very well and are approximately sums of the absorption spectra of the separate OPV(n) and MPC(60) molecules. Also, the absorption energies of OPV(n) and MPC(60) and the emission energies of OPV(n) are predicted well with the PBE0 functional. The PBE0 calculated resonant energy transfer rates are in a good agreement with the experimental rates and show the existence of many possible pathways for energy transfer from the first excited singlet states of the OPV(n) molecules to the MPC(60) molecule.
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Affiliation(s)
- Teemu L J Toivonen
- Institute of Materials Chemistry, Tampere University of Technology, P.O. Box 541, 33101 Tampere, Finland.
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31
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Ai X, Anderson N, Guo J, Kowalik J, Tolbert LM, Lian T. Ultrafast Photoinduced Charge Separation Dynamics in Polythiophene/SnO2 Nanocomposites. J Phys Chem B 2006; 110:25496-503. [PMID: 17165998 DOI: 10.1021/jp0652291] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a study of photoinduced interfacial electron transfer (ET) dynamics of SnO2 nanocrystalline thin films sensitized by polythiophene derivatives (regioregular poly(3-hexylthiophene) (P3HT) and regiorandom poly(3-undecyl-2,2'-bithiophene) (P3UBT)). ET dynamics were measured by following the dynamics of injected electrons in SnO2 and polarons in the conjugated polymer using ultrafast mid-IR transient absorption spectroscopy. The rate of electron transfer from P3HT and P3UBT to SnO2 films was determined to occur on sub-picosecond time scale (120 +/- 20 fs). In P3HT/SnO2 composite, interchain charge transfer was found to compete with and reduce the quantum efficiency of interfacial electron transfer at high polymer loading. This interchain charge separation processes can be reduced in non-regioregular polymer or at low polymer loading levels.
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Affiliation(s)
- Xin Ai
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, USA
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Koeppe R, Sariciftci NS. Photoinduced charge and energy transfer involving fullerene derivatives. Photochem Photobiol Sci 2006; 5:1122-31. [PMID: 17136277 DOI: 10.1039/b612933c] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this feature article, a brief overview over the photoinduced energy and charge transfer mechanisms involving fullerenes will be presented. The photoinduced charge separation between organic donor and acceptor molecules is the basic photophysical mechanism for natural photosynthesis and nearly all organic solar cell concepts. We will give a short introduction to the mechanisms of excited state charge transfer and resonant energy transfer and present examples of relevant applications in organic optoelectronics and photodynamic tumor therapy.
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Affiliation(s)
- R Koeppe
- Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, A-4040 Linz, Austria.
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Casado J, Ortiz RP, Ruiz Delgado MC, Hernandez V, López Navarrete JT, Raimundo JM, Blanchard P, Allain M, Roncali J. Alternated Quinoid/Aromatic Units in Terthiophenes Building Blocks for Electroactive Narrow Band Gap Polymers. Extended Spectroscopic, Solid State, Electrochemical, and Theoretical Study. J Phys Chem B 2005; 109:16616-27. [PMID: 16853114 DOI: 10.1021/jp0520300] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report here the synthesis of three novel pi-conjugated heterocyclic mixed trimers that contain two electron-donating 3,4-ethylenedioxy-2-thienyl (EDOT) units covalently attached to a central proquinoid electron-accepting thienopyrazine moiety (two of these narrow-HOMO-LUMO gap D-A-D compounds also bear hexyl side chains attached either to the outermost alpha positions of the EDOT end rings or to the beta positions of the pyrazine fused ring). The modification of the terthiophene structure upon EDO, pyrazine, and hexyl substitutions has been treated in detail with spectroscopic and theoretical arguments. Solid-state properties reveal the occurrence of short intramolecular contacts between heteroatoms of adjacent rings. The analysis of the structure of the pi-conjugated backbone of each molecule is consistent with a partial quinoid-like pattern which partially reverts to be subtly more aromatic depending on the topology of the positive inductive effect of the hexyl chains. This quinoidization is a consequence of the appearance of a D(EDOT)-->A(PyT)<--D(EDOT) intramolecular charge transfer which further polarizes the structure. The same chemical concepts have been applied to address their electrochemical behavior. The three mixed trimers exhibit amphoteric properties due to the combination of electron acceptor and donor groups. Given their relative low HOMO-LUMO energy gap, these trimers promise to be good candidates for obtaining polymers with significant low energy gap combining electroactivity.
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Affiliation(s)
- Juan Casado
- Departamento de Química Física, Facultad de Ciencias, Universidad de Malaga, 29071 Malaga, Spain
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Delgado JL, de la Cruz P, López-Arza V, Langa F, Gan Z, Araki Y, Ito O. Synthesis and Photoinduced Intermolecular Electronic Acceptor Ability of Pyrazolo[60]fullerenes vs Tetrathiafulvalene. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.1500] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ruiz Delgado MC, Hernández V, López Navarrete JT, Tanaka S, Yamashita Y. Combined Spectroscopic and Theoretical Study of Narrow Band Gap Heterocyclic Co-oligomers Containing Alternating Aromatic Donor and o-Quinoid Acceptor Units. J Phys Chem B 2004. [DOI: 10.1021/jp0312262] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mari Carmen Ruiz Delgado
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, 29071-Málaga, Spain, Department of Structural Molecular Science, The Graduate University for Advanced Studies, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Víctor Hernández
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, 29071-Málaga, Spain, Department of Structural Molecular Science, The Graduate University for Advanced Studies, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Juan T. López Navarrete
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, 29071-Málaga, Spain, Department of Structural Molecular Science, The Graduate University for Advanced Studies, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Shoji Tanaka
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, 29071-Málaga, Spain, Department of Structural Molecular Science, The Graduate University for Advanced Studies, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
| | - Yoshiro Yamashita
- Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, 29071-Málaga, Spain, Department of Structural Molecular Science, The Graduate University for Advanced Studies, and Institute for Molecular Science, Myodaiji, Okazaki 444, Japan, and Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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Offermans T, Meskers SCJ, Janssen RAJ. Charge recombination in a poly(para-phenylene vinylene)-fullerene derivative composite film studied by transient, nonresonant, hole-burning spectroscopy. J Chem Phys 2003. [DOI: 10.1063/1.1619946] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ramos AM, Meskers SCJ, van Hal PA, Knol J, Hummelen JC, Janssen RAJ. Photoinduced Multistep Energy and Electron Transfer in an Oligoaniline−Oligo(p-phenylene vinylene)−Fullerene Triad. J Phys Chem A 2003. [DOI: 10.1021/jp035549+] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Nogueira AF, Montanari I, Nelson J, Durrant JR, Winder C, Sariciftci NS, Brabec C. Charge Recombination in Conjugated Polymer/Fullerene Blended Films Studied by Transient Absorption Spectroscopy. J Phys Chem B 2003. [DOI: 10.1021/jp027101z] [Citation(s) in RCA: 190] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | | | - Christoph Brabec
- SIEMENS AG CT MM1-Innovative Electronics Paul-Gossenstrasse 100 35/409 D, 91052 Erlangen, Germany
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Wang S, Xiao S, Li Y, Shi Z, Du C, Fang H, Zhu D. Synthesis and characterization of new C60–PPV dyads containing carbazole moiety. POLYMER 2002. [DOI: 10.1016/s0032-3861(01)00795-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Roy M, Manmeeta, Jaiswal P, Sharma G. Effect of 1,1?-dibenzyl-4,4?-bipyridyl dichloride (DBD) on charge-conduction process and photovoltaic response of a polypyrrole (PPy) thin-film device. POLYM INT 2002. [DOI: 10.1002/pi.789] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Brabec CJ, Winder C, Scharber MC, Sariciftci NS, Hummelen JC, Svensson M, Andersson MR. Influence of disorder on the photoinduced excitations in phenyl substituted polythiophenes. J Chem Phys 2001. [DOI: 10.1063/1.1404984] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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van Hal P, Janssen R, Lanzani G, Cerullo G, Zavelani-Rossi M, De Silvestri S. Full temporal resolution of the two-step photoinduced energy–electron transfer in a fullerene–oligothiophene–fullerene triad using sub-10 fs pump–probe spectroscopy. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00874-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Heeger AJ. Semiconducting and Metallic Polymers: The Fourth Generation of Polymeric Materials (Nobel Lecture). Angew Chem Int Ed Engl 2001; 40:2591-2611. [DOI: 10.1002/1521-3773(20010716)40:14<2591::aid-anie2591>3.0.co;2-0] [Citation(s) in RCA: 1273] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2001] [Indexed: 11/11/2022]
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Zerza G, Röthler B, Sariciftci NS, Gómez R, Segura JL, Martín N. Photophysical Properties and Optoelectronic Device Applications of a Novel Naphthalene−Vinylene Type Conjugated Polymer. J Phys Chem B 2001. [DOI: 10.1021/jp0021852] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zerza G, Cravino A, Neugebauer H, Sariciftci NS, Gómez R, Segura JL, Martín N, Svensson M, Andersson MR. Photoinduced Electron Transfer in Donor−Acceptor Double-Cable Polymers: Polythiophene Bearing Tetracyanoanthraquinodimethane Moieties. J Phys Chem A 2001. [DOI: 10.1021/jp0037448] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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