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Aires A, Sousaraei A, Möller M, Cabanillas-Gonzalez J, Cortajarena AL. Boosting the Photoluminescent Properties of Protein-Stabilized Gold Nanoclusters through Protein Engineering. Nano Lett 2021; 21:9347-9353. [PMID: 34723561 DOI: 10.1021/acs.nanolett.1c03768] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This work reports on the use of protein engineering as a versatile tool to rationally design metal-binding proteins for the synthesis of highly photoluminescent protein-stabilized gold nanoclusters (Prot-AuNCs). The use of a single repeat protein scaffold allowed the incorporation of a set of designed metal-binding sites to understand the effect of the metal-coordinating residues and the protein environment on the photoluminescent (PL) properties of gold nanoclusters (AuNCs). The resulting Prot-AuNCs, synthesized by two sustainable procedures, showed size-tunable color emission and outstanding PL properties. In a second stage, tryptophan (Trp) residues were introduced at specific positions to provide an electron-rich protein environment and favor energy transfer from Trps to AuNCs. This modification resulted in improved PL properties relevant for future applications in sensing, biological labeling, catalysis, and optics.
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Affiliation(s)
- Antonio Aires
- Center for Cooperative Research in Biomaterials (CICbiomaGUNE), Basque Research and Technology Alliance (BRTA). Paseo de Miramón 194, Donostia-San Sebastián 20014, Spain
| | - Ahmad Sousaraei
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, Campus Universitario de Cantoblanco, Madrid 28049, Spain
| | - Marco Möller
- Center for Cooperative Research in Biomaterials (CICbiomaGUNE), Basque Research and Technology Alliance (BRTA). Paseo de Miramón 194, Donostia-San Sebastián 20014, Spain
| | - Juan Cabanillas-Gonzalez
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, Campus Universitario de Cantoblanco, Madrid 28049, Spain
| | - Aitziber L Cortajarena
- Center for Cooperative Research in Biomaterials (CICbiomaGUNE), Basque Research and Technology Alliance (BRTA). Paseo de Miramón 194, Donostia-San Sebastián 20014, Spain
- Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain
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Mahoro GU, Fresta E, Elie M, di Nasso D, Zhang Q, Lohier JF, Renaud JL, Linares M, Wannemacher R, Cabanillas-Gonzalez J, Costa RD, Gaillard S. Towards rainbow photo/electro-luminescence in copper(i) complexes with the versatile bridged bis-pyridyl ancillary ligand. Dalton Trans 2021; 50:11049-11060. [PMID: 34286773 DOI: 10.1039/d1dt01689j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a family of copper(i) complexes bearing a bridged bis-pyridyl ancillary ligand is reported, highlighting how the bridge nature impacts the photo- and electro-luminescent behaviours within the family. In particular, the phosphonium bridge led to copper(i) complexes featuring good electrochemical stability and high ionic conductivity, as well as a stark blue-to-orange luminescence shift compared to the others. This resulted in high performance light-emitting electrochemical cells reaching stabilities of 10 mJ at ca. 40 cd m-2 that are one order of magnitude higher than those of the other complexes. Overall, this work sheds light onto the crucial role of the bridge nature of the bis-pyridyl ancillary ligand on the photophysical features, film forming and, in turn, on the final device performances.
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Fresta E, Dosso J, Cabanillas-Gonzalez J, Bonifazi D, Costa RD. Revealing the Impact of Heat Generation Using Nanographene-Based Light-Emitting Electrochemical Cells. ACS Appl Mater Interfaces 2020; 12:28426-28434. [PMID: 32476401 DOI: 10.1021/acsami.0c06783] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Self-heating in light-emitting electrochemical cells (LECs) has been long overlooked, while it has a significant impact on (i) device chromaticity by changing the electroluminescent band shape, (ii) device efficiency because of thermal quenching and exciton dissociation reducing the external quantum efficiency (EQE), and (iii) device stability because of thermal degradation of excitons and eliminate doped species, phase separation, and collapse of the intrinsic emitting zone. Herein, we reveal, for the first time, a direct relationship between self-heating and the early changes in the device chromaticity as well as the magnitude of the error comparing theoretical/experimental EQEs-that is, an overestimation error of ca. 35% at usual pixel working temperatures of around 50 °C. This has been realized in LECs using a benchmark nanographene-that is, a substituted hexa-peri-hexabenzocoronene-as an emerging class of emitters with outstanding device performance compared to the prior art of small-molecule LECs-for example, luminances of 345 cd/m2 and EQEs of 0.35%. As such, this work is a fundamental contribution highlighting how self-heating is a critical limitation toward the optimization and wide use of LECs.
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Affiliation(s)
- Elisa Fresta
- IMDEA Materials Institute, Calle Eric Kandel 2, E-28906 Getafe, Madrid, Spain
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, Calle Francisco Tomás y Valiente, 7, 28049 Madrid, Spain
| | - Jacopo Dosso
- School of Chemistry, Cardiff University, CF10 3AT Cardiff, Great Britain
| | | | - Davide Bonifazi
- School of Chemistry, Cardiff University, CF10 3AT Cardiff, Great Britain
- Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Rubén D Costa
- IMDEA Materials Institute, Calle Eric Kandel 2, E-28906 Getafe, Madrid, Spain
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Gamonal A, Sun C, Mariano AL, Fernandez-Bartolome E, Guerrero-SanVicente E, Vlaisavljevich B, Castells-Gil J, Marti-Gastaldo C, Poloni R, Wannemacher R, Cabanillas-Gonzalez J, Sanchez Costa J. Divergent Adsorption-Dependent Luminescence of Amino-Functionalized Lanthanide Metal-Organic Frameworks for Highly Sensitive NO 2 Sensors. J Phys Chem Lett 2020; 11:3362-3368. [PMID: 32195588 DOI: 10.1021/acs.jpclett.0c00457] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A novel gas sensing mechanism exploiting lanthanide luminescence modulation upon NO2 adsorption is demonstrated here. Two isostructural lanthanide-based metal-organic frameworks (MOFs) are used, including an amino group as the sensitive recognition center for NO2 molecules. The transfer of energy from the organic ligands to Ln is strongly dependent on the presence of NO2, resulting in an unprecedented photoluminescent sensing scheme. Thereby, NO2 exposition triggers either a reversible enhancement or a decrease in the luminescence intensity, depending on the lanthanide ion (Eu or Tb). Our experimental studies combined with density functional theory and complete active space self-consistent field calculations provide an understanding of the nature and effects of NO2 interactions within the MOFs and the signal transduction mechanism.
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Affiliation(s)
- Arturo Gamonal
- IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid 28049, Spain
| | - Chen Sun
- IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid 28049, Spain
| | - A Lorenzo Mariano
- SIMaP laboratory, CNRS, University Grenoble Alpes, Grenoble 38400, France
| | | | | | - Bess Vlaisavljevich
- University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Javier Castells-Gil
- Instituto de Ciencia Molecular, Universitat de Valencia, Catedrático José Beltrán 2, Paterna 46980, Spain
| | - Carlos Marti-Gastaldo
- Instituto de Ciencia Molecular, Universitat de Valencia, Catedrático José Beltrán 2, Paterna 46980, Spain
| | - Roberta Poloni
- SIMaP laboratory, CNRS, University Grenoble Alpes, Grenoble 38400, France
| | | | | | - Jose Sanchez Costa
- IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid 28049, Spain
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5
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Fresta E, Baumgärtner K, Cabanillas-Gonzalez J, Mastalerz M, Costa RD. Bright, stable, and efficient red light-emitting electrochemical cells using contorted nanographenes. Nanoscale Horiz 2020; 5:473-480. [PMID: 32118226 DOI: 10.1039/c9nh00641a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This work rationalizes, for the first time, the electroluminescent behavior of a representative red-emitting contorted nanographene -i.e., hexabenzoovalene derivative - in small molecule light-emitting electrochemical cells (SM-LECs). This new emitter provides devices with irradiances of ca. 220 μW cm-2 (242 cd m-2), external quantum efficiencies (EQE) of 0.78% (<25% loss of the maximum theoretical EQE), and stabilities over 200 h. Upon optimizing the device architecture, the stability increased up to 3600 h (measured) and 13 000 h (extrapolated) at a high brightness of ca. 30 μW cm-2 (34 cd m-2). This represents a record stability at a high brightness level compared to the state-of-the-art SM-LECs (1000 h at 0.3 μW cm-2). In addition, we rationalized one of the very rare LEC examples in which the changes of the electroluminescence band shape relates to the dependence of the relative intensity of the vibrational peaks with electric field, as corroborated by dynamic electrochemical impedance spectroscopy assays. Nevertheless, this exclusive electroluminescence behavior does not affect the device color, realizing one of the most stable, bright, and efficient red-emitting SM-LECs up to date.
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Affiliation(s)
- Elisa Fresta
- IMDEA Materials Institute, Calle Eric Kandel 2, E-28906 Getafe, Madrid, Spain.
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Sousaraei A, Queirós C, Moscoso FG, Lopes-Costa T, Pedrosa JM, Silva AMG, Cunha-Silva L, Cabanillas-Gonzalez J. Subppm Amine Detection via Absorption and Luminescence Turn-On Caused by Ligand Exchange in Metal Organic Frameworks. Anal Chem 2019; 91:15853-15859. [DOI: 10.1021/acs.analchem.9b04291] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ahmad Sousaraei
- Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle Faraday 9, Universitaria de Cantoblanco, 28049 Madrid, Spain
| | - Carla Queirós
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Francisco G. Moscoso
- Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Sevilla, Spain
| | - Tania Lopes-Costa
- Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Sevilla, Spain
| | - Jose M. Pedrosa
- Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Ctra. Utrera Km. 1, 41013 Sevilla, Spain
| | - Ana M. G. Silva
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Luís Cunha-Silva
- REQUIMTE-LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Juan Cabanillas-Gonzalez
- Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle Faraday 9, Universitaria de Cantoblanco, 28049 Madrid, Spain
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7
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Sanchez-deAlcazar D, Romera D, Castro-Smirnov J, Sousaraei A, Casado S, Espasa A, Morant-Miñana MC, Hernandez JJ, Rodríguez I, Costa RD, Cabanillas-Gonzalez J, Martinez RV, Cortajarena AL. Engineered protein-based functional nanopatterned materials for bio-optical devices. Nanoscale Adv 2019; 1:3980-3991. [PMID: 36132122 PMCID: PMC9418893 DOI: 10.1039/c9na00289h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 08/20/2019] [Indexed: 05/08/2023]
Abstract
The development of new active biocompatible materials and devices is a current need for their implementation in multiple fields, including the fabrication of implantable devices for biomedical applications and sustainable devices for bio-optics and bio-optoelectronics. This paper describes a simple strategy to use designed proteins to develop protein-based functional materials. Using simple proteins as self-assembling building blocks as a platform for the fabrication of new optically active materials takes previous work one step further towards the design of materials with defined structures and functions using naturally occurring protein materials, such as silk. The proposed fabrication strategy generates thin and flexible nanopatterned protein films by letting the engineered protein elements self-assemble over the surface of an elastomeric stamp with nanoscale features. These nanopatterned protein films are easily transferred onto 3D objects (flat and curved) by moisture-induced adhesion. Additionally, flexible nanopatterned protein films are prepared by incorporating a thin polymeric layer as a back support. Finally, taking advantage of the tunability of the selected protein scaffold, the flexible protein-based surfaces are endowed with optical functions, achieving efficient lasing features. As such, this work enables the simple and cost-effective production of flexible and nanostructured, protein-based, optically active biomaterials and devices over large areas toward emerging applications.
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Affiliation(s)
| | - David Romera
- IMDEA-Nanociencia Campus Universitario de Cantoblanco 28049 Madrid Spain
| | | | - Ahmad Sousaraei
- IMDEA-Nanociencia Campus Universitario de Cantoblanco 28049 Madrid Spain
| | - Santiago Casado
- IMDEA-Nanociencia Campus Universitario de Cantoblanco 28049 Madrid Spain
- Facultad de Ciencia e Ingeniería en Alimentos, Universidad Técnica de Ambato Avda. Los Chasquis y río Payamino s/n 180207 Ambato Ecuador
| | - Anna Espasa
- IMDEA-Materiales C/Eric Kandel, 2 - Tecnogetafe 28906 Getafe-Madrid Spain
| | - María C Morant-Miñana
- CIC energiGUNE Parque Tecnologico de Alava, Albert Einstein 48 ED CIC 01510 Miñano Spain
| | - Jaime J Hernandez
- IMDEA-Nanociencia Campus Universitario de Cantoblanco 28049 Madrid Spain
| | - Isabel Rodríguez
- IMDEA-Nanociencia Campus Universitario de Cantoblanco 28049 Madrid Spain
| | - Rubén D Costa
- IMDEA-Materiales C/Eric Kandel, 2 - Tecnogetafe 28906 Getafe-Madrid Spain
| | | | - Ramses V Martinez
- School of Industrial Engineering, Purdue University 315 N. Grant Street West Lafayette Indiana 47907 USA
- Weldon School of Biomedical Engineering, Purdue University 206 S. Martin Jischke Drive West Lafayette Indiana 47907 USA
| | - Aitziber L Cortajarena
- CIC biomaGUNE Paseo de Miramón 182 E-20014 Donostia-San Sebastian Spain
- IMDEA-Nanociencia Campus Universitario de Cantoblanco 28049 Madrid Spain
- Ikerbasque, Basque Foundation for Science Ma Díaz de Haro 3 48013 Bilbao Spain
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8
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Ou C, Cheetham NJ, Weng J, Yu M, Lin J, Wang X, Sun C, Cabanillas-Gonzalez J, Xie L, Bai L, Han Y, Bradley DDC, Huang W. Hierarchical Uniform Supramolecular Conjugated Spherulites with Suppression of Defect Emission. iScience 2019; 16:399-409. [PMID: 31228748 PMCID: PMC6593144 DOI: 10.1016/j.isci.2019.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 04/16/2019] [Accepted: 06/03/2019] [Indexed: 12/11/2022] Open
Abstract
Easily processed, well-defined, and hierarchical uniform artificial architectures with intrinsic strong crystalline emission properties are necessary for a range of light-emitting optoelectronic devices. Herein, we designed and prepared ordered supramolecular spherulites, comprising planar conformational molecules as primary structures and multiple hydrogen bonds as physical cross-links. Compared with serious aggregation-induced fluorescence quenching (up to 70%), these highly ordered architectures exhibited unique and robust crystalline emission with a high PLQY of 55%, which was much higher than those of other terfluorenes. The primary reasons for the high PLQY are the uniform exciton energetic landscape created in the planar conformation and the highly ordered molecular packing in spherulite. Meanwhile, minimal residual defect (green-band) emissions are effectively suppressed in our oriented crystalline framework, whereas the strong and stable blue light radiations are promoted. These findings may confirm that supramolecular ordered artificial architectures may offer higher control and tunability for optoelectronic applications. Coplanar molecular conformation is stabilized in supramolecular crystalline frameworks Spiro-terfluorene can self-assemble into hierarchical well-defined spherulites Ordered and uniform condensed structures suppress defect emission
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Affiliation(s)
- Changjin Ou
- School of Physical and Mathematical Sciences & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China; Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Nathan J Cheetham
- Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Jiena Weng
- School of Physical and Mathematical Sciences & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China; Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, Shaanxi, China
| | - Mengna Yu
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Jinyi Lin
- School of Physical and Mathematical Sciences & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China; Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, Shaanxi, China; Departments of Engineering Science and Physics and Division of Mathematical, Physical and Life Sciences, University of Oxford, 9 Parks Road, Oxford OX1 3PD, UK.
| | - Xuhua Wang
- Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Chen Sun
- Madrid Institute for Advanced Studies (IMDEA Nanociencia), Ciudad Universitaria de Cantoblanco, Calle Faraday 9, Madrid 28049, Spain
| | - Juan Cabanillas-Gonzalez
- Madrid Institute for Advanced Studies (IMDEA Nanociencia), Ciudad Universitaria de Cantoblanco, Calle Faraday 9, Madrid 28049, Spain
| | - Linghai Xie
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China; Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, Shaanxi, China.
| | - Lubing Bai
- School of Physical and Mathematical Sciences & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Yamin Han
- School of Physical and Mathematical Sciences & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Donal D C Bradley
- Departments of Engineering Science and Physics and Division of Mathematical, Physical and Life Sciences, University of Oxford, 9 Parks Road, Oxford OX1 3PD, UK
| | - Wei Huang
- School of Physical and Mathematical Sciences & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China; Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China; Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, Shaanxi, China.
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9
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Aires A, Llarena I, Moller M, Castro-Smirnov J, Cabanillas-Gonzalez J, Cortajarena AL. A Simple Approach to Design Proteins for the Sustainable Synthesis of Metal Nanoclusters. Angew Chem Int Ed Engl 2019; 58:6214-6219. [PMID: 30875448 PMCID: PMC6617723 DOI: 10.1002/anie.201813576] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/19/2019] [Indexed: 12/24/2022]
Abstract
Metal nanoclusters (NCs) are considered ideal nanomaterials for biological applications owing to their strong photoluminescence (PL), excellent photostability, and good biocompatibility. This study presents a simple and versatile strategy to design proteins, via incorporation of a di‐histidine cluster coordination site, for the sustainable synthesis and stabilization of metal NCs with different metal composition. The resulting protein‐stabilized metal NCs (Prot‐NCs) of gold, silver, and copper are highly photoluminescent and photostable, have a long shelf life, and are stable under physiological conditions. The biocompatibility of the clusters was demonstrated in cell cultures in which Prot‐NCs showed efficient cell internalization without affecting cell viability or losing luminescence. Moreover, the approach is translatable to other proteins to obtain Prot‐NCs for various biomedical applications such as cell imaging or labeling.
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Affiliation(s)
- Antonio Aires
- CIC biomaGUNE, Parque Tecnológico de San Sebastián, Paseo Miramón 182, 20014, Donostia-San Sebastián, Spain
| | - Irantzu Llarena
- CIC biomaGUNE, Parque Tecnológico de San Sebastián, Paseo Miramón 182, 20014, Donostia-San Sebastián, Spain
| | - Marco Moller
- CIC biomaGUNE, Parque Tecnológico de San Sebastián, Paseo Miramón 182, 20014, Donostia-San Sebastián, Spain
| | - Jose Castro-Smirnov
- IMDEA Nanociencia, Campus Universitario de Cantoblanco, 28049, Madrid, Spain
| | | | - Aitziber L Cortajarena
- CIC biomaGUNE, Parque Tecnológico de San Sebastián, Paseo Miramón 182, 20014, Donostia-San Sebastián, Spain.,Ikerbasque, Basque Foundation for Science, Ma Díaz de Haro 3, 48013, Bilbao, Spain
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10
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Nemati Bideh B, Shahroosvand H, Sousaraei A, Cabanillas-Gonzalez J. A near infrared light emitting electrochemical cell with a 2.3 V turn-on voltage. Sci Rep 2019; 9:228. [PMID: 30659218 PMCID: PMC6338728 DOI: 10.1038/s41598-018-36420-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 11/09/2018] [Indexed: 11/08/2022] Open
Abstract
We report on an organic electroluminescent device with simplified geometry and emission in the red to near infrared (NIR) spectral region which, has the lowest turn-on voltage value, 2.3 V, among light emitting electrochemical cells (LEECs). We have synthesized and characterized three novel ruthenium π-extended phenanthroimidazoles which differ on their N^N ligands. The use of dimethyl electron donating groups along with the π-extended phenanthroimidazole moiety promotes ambipolar transport thereby avoiding the use of additional charge transport layers. Furthermore, a facile cathode deposition method based on transfer of a molten alloy (Ga:In) on top of the active layer is deployed, thus avoiding high vacuum thermal deposition which adds versatile assets to our approach. We combine ambipolar charge transport organic complex design and a simple ambient cathode deposition to achieve a potentially cost effective red to NIR emitting device with outstanding performance, opening new avenues towards the development of simplified light emitting sources through device optimization.
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Affiliation(s)
- Babak Nemati Bideh
- Group for Molecular Engineering of Advanced Functional Materials (GMA),Chemistry Department, University of Zanjan, Zanjan, Iran
| | - Hashem Shahroosvand
- Group for Molecular Engineering of Advanced Functional Materials (GMA),Chemistry Department, University of Zanjan, Zanjan, Iran.
| | - Ahmad Sousaraei
- Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain
| | - Juan Cabanillas-Gonzalez
- Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain
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11
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Lin J, Liu B, Yu M, Wang X, Lin Z, Zhang X, Sun C, Cabanillas-Gonzalez J, Xie L, Liu F, Ou C, Bai L, Han Y, Xu M, Zhu W, Smith TA, Stavrinou PN, Bradley DDC, Huang W. Ultrastable Supramolecular Self-Encapsulated Wide-Bandgap Conjugated Polymers for Large-Area and Flexible Electroluminescent Devices. Adv Mater 2019; 31:e1804811. [PMID: 30370608 DOI: 10.1002/adma.201804811] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 09/17/2018] [Indexed: 06/08/2023]
Abstract
Controlling chain behavior through smart molecular design provides the potential to develop ultrastable and efficient deep-blue light-emitting conjugated polymers (LCPs). Herein, a novel supramolecular self-encapsulation strategy is proposed to construct a robust ultrastable conjugated polydiarylfluorene (PHDPF-Cz) via precisely preventing excitons from interchain cross-transfer/coupling and contamination from external trace H2 O/O2 . PHDPF-Cz consists of a mainchain backbone where the diphenyl groups localize at the 9-position as steric bulk moieties, and carbazole (Cz) units localize at the 4-position as supramolecular π-stacked synthon with the dual functionalities of self-assembly capability and hole-transport facility. The synergistic effect of the steric bulk groups and π-stacked carbazoles affords PHDPF-Cz as an ultrastable property, including spectral, morphological stability, and storage stability. In addition, PHDPF-Cz spin-coated gelation films also show thickness-insensitive deep-blue emission with respect to the reference polymers, which are suitable to construct solution-processed large-scale optoelectronic devices with higher reproducibility. High-quality and uniform deep-blue emission is observed in large-area solution-processed films. The electroluminescence shows high-quality deep-blue intrachain emission with a CIE (0.16, 0.12) and a very narrow full width at half-maximum of 32 nm. Finally, large-area and flexible polymer light-emitting devices with a single-molecular excitonic behavior are also fabricated. The supramolecular self-encapsulation design provides an effective strategy to construct ultrastable LCPs for optoelectronic applications.
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Affiliation(s)
- Jinyi Lin
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
- Departments of Engineering Science and Physics and Division of Mathematical, Physical and Life Sciences, University of Oxford, 9 Parks Road, Oxford, OX1 3PD, UK
- Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ, UK
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, Shaanxi, China
| | - Bin Liu
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Mengna Yu
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Xuhua Wang
- Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ, UK
| | - Zongqiong Lin
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, Shaanxi, China
| | - Xinwen Zhang
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Chen Sun
- Madrid Institute for Advanced Studies (IMDEA Nanociencia), Ciudad Universitaria de Cantoblanco, Calle Faraday 9, Madrid, 28049, Spain
| | - Juan Cabanillas-Gonzalez
- Madrid Institute for Advanced Studies (IMDEA Nanociencia), Ciudad Universitaria de Cantoblanco, Calle Faraday 9, Madrid, 28049, Spain
| | - Linghai Xie
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Feng Liu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Changjin Ou
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Lubing Bai
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Yamin Han
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Man Xu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Wensai Zhu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Trevor A Smith
- ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Paul N Stavrinou
- Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ, UK
- Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PD, UK
| | - Donal D C Bradley
- Departments of Engineering Science and Physics and Division of Mathematical, Physical and Life Sciences, University of Oxford, 9 Parks Road, Oxford, OX1 3PD, UK
- Department of Physics and Centre for Plastic Electronics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ, UK
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, Shaanxi, China
- Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
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12
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Zhang Q, Castro Smirnov JR, Xia R, Pedrosa JM, Rodriguez I, Cabanillas-Gonzalez J, Huang W. Highly pH-responsive sensor based on amplified spontaneous emission coupled to colorimetry. Sci Rep 2017; 7:46265. [PMID: 28387354 PMCID: PMC5384246 DOI: 10.1038/srep46265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 03/14/2017] [Indexed: 12/19/2022] Open
Abstract
We demonstrated a simple, directly-readable approach for high resolution pH sensing. The method was based on sharp changes in Amplified Spontaneous Emission (ASE) of a Stilbene 420 (ST) laser dye triggered by the pH-dependent absorption of Bromocresol Green (BG). The ASE threshold of BG:ST solution mixtures exhibited a strong dependence on BG absorption, which was drastically changed by the variations of the pH of BG solution. As a result, ASE on-off or off-on was observed with different pH levels achieved by ammonia doping. By changing the concentration of the BG solution and the BG:ST blend ratio, this approach allowed to detect pH changes with a sensitivity down to 0.05 in the 10–11 pH range.
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Affiliation(s)
- Qi Zhang
- Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, National Jiangsu Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China
| | - Jose R Castro Smirnov
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Spain
| | - Ruidong Xia
- Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, National Jiangsu Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, China
| | - Jose M Pedrosa
- Department of Physical, Chemical and Natural System, Universidad Pablo de Olavide, Seville, ES 41013, Spain
| | - Isabel Rodriguez
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Spain
| | - Juan Cabanillas-Gonzalez
- Madrid Institute for Advanced Studies, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Spain
| | - Wei Huang
- Institute of Advanced Materials (IAM), Jiangsu-Singapore Joint Research Center for Organic/Bio-Electronics &Information Displays, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
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13
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Wu L, Casado S, Romero B, Otón JM, Morgado J, Müller C, Xia R, Cabanillas-Gonzalez J. Ground State Host–Guest Interactions upon Effective Dispersion of Regioregular Poly(3-hexylthiophene) in Poly(9,9-dioctylfluorene-alt-benzothiadiazole). Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02111] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Longfei Wu
- Madrid
Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle
Faraday 9, Ciudad Universitaria de Cantoblanco 28049, Spain
| | - Santiago Casado
- Madrid
Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle
Faraday 9, Ciudad Universitaria de Cantoblanco 28049, Spain
| | - Beatriz Romero
- Escuela
de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, calle Tulipán s/n, 28933 Móstoles, Spain
| | - Jose Manuel Otón
- CEMDATIC,
Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain
| | - Jorge Morgado
- Instituto de Telecomunicações, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
- Department
of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, P-1049-001 Lisboa, Portugal
| | - Christian Müller
- Department
of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Göteborg, Sweden
| | - Ruidong Xia
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials, National Jiangsu Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, P.R., China
| | - Juan Cabanillas-Gonzalez
- Madrid
Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle
Faraday 9, Ciudad Universitaria de Cantoblanco 28049, Spain
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14
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Qian Y, Wei Q, Del Pozo G, Mróz MM, Lüer L, Casado S, Cabanillas-Gonzalez J, Zhang Q, Xie L, Xia R, Huang W. H-shaped oligofluorenes for highly air-stable and low-threshold non-doped deep blue lasing. Adv Mater 2014; 26:2937-2942. [PMID: 24665075 DOI: 10.1002/adma.201305355] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 11/23/2013] [Indexed: 06/03/2023]
Abstract
H-shaped oligofluorenes as gain media exhibit excellent photo- (large robustness against oxidation) and thermal stabilities in ambient atmosphere for large σe and low-threshold (0.22 nJ pulse(-1) ) deep blue distributed feedback (DFB) lasers. Their amplified spontaneous emission (ASE) thresholds increase less than 3-fold and the emission spectra exhibit almost no shift with film samples annealed up to 200 °C in open air.
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Affiliation(s)
- Yan Qian
- Key Laboratory for Organic Electronics & Information Displays (KLOEID), Jiangsu-Singapore Joint Research Center for Organic/Bio Electronics & Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210046, P.R. China
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15
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Mróz MM, Sforazzini G, Zhong Y, Wong KS, Anderson HL, Lanzani G, Cabanillas-Gonzalez J. Amplified spontaneous emission in conjugated polyrotaxanes under quasi-CW pumping. Adv Mater 2013; 25:4347-4351. [PMID: 23813773 DOI: 10.1002/adma.201301703] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Indexed: 06/02/2023]
Abstract
Amplified spontaneous emission under millisecond pulsed excitation on a rotaxane-insulated conjugated polymer is reported. Pump-probe spectroscopy confirms the absence of polaron-pair absorption in the gain spectral region as the main factor contributing to quasi-steady-state amplified spontaneous emission. The low polaron-pair yield in this compound is the likely result of effective backbone encapsulation provided by the threading ring.
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Affiliation(s)
- Marta M Mróz
- Instituto Madrileño de Estudios Avanzados, (IMDEA-Nanociencia), Cantoblanco, Madrid 28049, Spain.
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16
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Cabanillas-Gonzalez J, Schmidt M, Peña-Rodríguez O, Alonso MI, Goñi AR, Campoy-Quiles M. Effect of structure and interlayer diffusion in organic position sensitive photodetectors based on complementary wedge donor/acceptor layers. J Nanosci Nanotechnol 2013; 13:5148-5153. [PMID: 23901544 DOI: 10.1166/jnn.2013.7503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have developed organic photodetectors based on two complementary wedge layers made of CuPc and C60 and observed a strong spatial dependence of the spectral response on the position of the incident light spot. Photocurrent measurements are correlated with atomic force microscopy (AFM), micro-Raman and ellipsometry maps in order to provide insights into the local donor/acceptor concentration, layer thickness and nature of the donor-acceptor interface along the direction of the thickness gradient. Deviations in spatial dependence between experimental photocurrent values and those predicted with a model assuming a sharp and well defined organic-organic interface are discussed in terms of inter-diffusion layers.
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Affiliation(s)
- Juan Cabanillas-Gonzalez
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049-Madrid, Spain
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17
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Fazzi D, Scotognella F, Milani A, Brida D, Manzoni C, Cinquanta E, Devetta M, Ravagnan L, Milani P, Cataldo F, Lüer L, Wannemacher R, Cabanillas-Gonzalez J, Negro M, Stagira S, Vozzi C. Ultrafast spectroscopy of linear carbon chains: the case of dinaphthylpolyynes. Phys Chem Chem Phys 2013; 15:9384-91. [DOI: 10.1039/c3cp50508a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Cabanillas-Gonzalez J, Grancini G, Lanzani G. Pump-probe spectroscopy in organic semiconductors: monitoring fundamental processes of relevance in optoelectronics. Adv Mater 2011; 23:5468-5485. [PMID: 22020959 DOI: 10.1002/adma.201102015] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Indexed: 05/31/2023]
Abstract
In this review we highlight the contribution of pump-probe spectroscopy to understand elementary processes taking place in organic based optoelectronic devices. The techniques described in this article span from conventional pump-probe spectroscopy to electromodulated pump-probe and the state-of-the-art confocal pump-probe microscopy. The article is structured according to three fundamental processes (optical gain, charge photogeneration and charge transport) and the contribution of these techniques on them. The combination of these tools opens up new perspectives for assessing the role of short-lived excited states on processes lying underneath organic device operation.
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19
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Virgili T, Clark J, Cabanillas-Gonzalez J, Bazzana L, Vishnubhatla KC, Osellame R, Ramponi R, Lanzani G. Ultrafast optical gain switch in organic photonic devices. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b915117f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Sessi P, Brambilla A, Finazzi M, Duò L, Cabanillas-Gonzalez J, Egelhaaf H, Lanzani G, Ciccacci F. Evidence of photoinduced charge transfer in C60/GaAs(100) bilayers by pump–probe measurements. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.10.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Cabanillas-Gonzalez J, Egelhaaf HJ, Brambilla A, Sessi P, Duò L, Finazzi M, Ciccacci F, Lanzani G. Combined spectroscopic characterization of electron transfer at hybrid CuPcF(16)/GaAs semiconductor interfaces. Nanotechnology 2008; 19:424010. [PMID: 21832670 DOI: 10.1088/0957-4484/19/42/424010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We characterize photoinduced charge injection at the interface between a fluorinated copper phthalocyanine (CuPcF(16)) film deposited over a GaAs(100) wafer by means of pump-probe spectroscopy combined with ultraviolet photoemission spectroscopy (UPS) and electromodulated transmission spectroscopy. UPS characterization of the hybrid interface demonstrates that the CuPcF(16) 's lowest unoccupied molecular level (LUMO) is almost aligned with the GaAs conduction band. Upon photoexcitation of the hybrid interface with 150 fs pulses we observe an efficient photoinduced electron transfer from CuPcF(16) to GaAs. The evolution of interfacial CuPcF(16) charges appear to be strongly influenced by energy level alignment at the GaAs/CuPcF(16) heterojunction.
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22
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Cabanillas-Gonzalez J, Sciascia C, Lanzani G, Toffanin S, Capelli R, Ramon MC, Muccini M, Gierschner J, Hwu TY, Wong KT. Molecular packing effects on the optical spectra and triplet dynamics in oligofluorene films. J Phys Chem B 2008; 112:11605-9. [PMID: 18712907 DOI: 10.1021/jp8044143] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We report on the triplet spectra and dynamics in two types of oligomeric films deposited by two different techniques: thermal evaporation and spin coating. The different molecular arrangement in both films is manifested in a red shift of the absorption, PL, and T1-Tn absorption spectra of the sublimated film relative to the spin-coated one. Triplet recombination dynamics studied with steady-state photoinduced absorption (PA) spectroscopy follow a dispersive bimolecular recombination model away from the trap filling regime. We obtained values for the triplet bimolecular recombination ratio (beta) of 3.4 x 10 (-14) and 1.1 x 10 (-15) cm3 s (-1) for evaporated and spin-coated film, respectively, the difference being attributed to diverse molecular arrangement in both films.
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23
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Calegari F, Valentini G, Vozzi C, Benedetti E, Cabanillas-Gonzalez J, Faenov A, Gasilov S, Pikuz T, Poletto L, Sansone G, Villoresi P, Nisoli M, De Silvestri S, Stagira S. Elemental sensitivity in soft x-ray imaging with a laser-plasma source and a color center detector. Opt Lett 2007; 32:2593-5. [PMID: 17767316 DOI: 10.1364/ol.32.002593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Elemental sensitivity in soft x-ray imaging of thin foils with known thickness is observed using an ultrafast laser-plasma source and a LiF crystal as detector. Measurements are well reproduced by a simple theoretical model. This technique can be exploited for high spatial resolution, wide field of view imaging in the soft x-ray region, and it is suitable for the characterization of thin objects with thicknesses ranging from hundreds down to tens of nanometers.
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Affiliation(s)
- F Calegari
- National Laboratory for Ultrafast and Ultraintense Optical Science, CNR-INFM, Politecnico, Milan, Italy
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24
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Cabanillas-Gonzalez J, Virgili T, Gambetta A, Lanzani G, Anthopoulos TD, de Leeuw DM. Photoinduced transient stark spectroscopy in organic semiconductors: a method for charge mobility determination in the picosecond regime. Phys Rev Lett 2006; 96:106601. [PMID: 16605770 DOI: 10.1103/physrevlett.96.106601] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Indexed: 05/08/2023]
Abstract
Subpicosecond photoinduced Stark spectroscopy experiments are carried out for measuring charge carrier mobility in organic semiconductors. The technique is demonstrated in state-of-art devices based on methanofullerene. The transient mobility of photogenerated charge carriers is measured in the picosecond time domain. Electric field dependent mobility is observed from the earliest time scales. In addition, two distinct transport regimes are revealed: a short-lived state, approximately 10 ps, of high mobility and a transient towards the trap limited transport, associated with the mesoscopic structure of the medium.
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Affiliation(s)
- J Cabanillas-Gonzalez
- IFN-CNR, Dipartimento di Fisica, ULTRAS-INFM-CNR, Politecnico di Milano, Milano 20133, Milan, Italy
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