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Journal articleHidalgo Castillo TC, Ponder JF, Feng K, et al., 2026,
Side Chains Override Crystallinity in n-Type Organic Mixed Conductors.
, Adv MaterIn organic semiconductors, crystallinity is commonly associated with enhanced charge transport. For organic mixed ionic-electronic conductors (OMIECs), materials at the core of bioelectronic devices, whether higher crystallinity consistently translates into improved performance remains unresolved. Here, we use thermal annealing to control the crystallinity of three electron-transporting OMIECs bearing either branched or linear ethylene glycol side chains that are used to promote ion transport. Although annealing uniformly enhances crystallinity across all materials, it improves mixed charge transport only in polymers with linear side chains by doubling electronic charge mobility. Specifically, annealed films with branched side chains exhibit reduced mobility and low water uptake, coinciding with a pronounced bipolaron formation, which we uncovered using a combination of in-operando physicochemical characterization methods. Thermal annealing is also used to sterilize these materials for interfacing with living cells, with the benefit of improved sensor performance. These results reveal that crystallinity can hinder mixed conductivity depending on side-chain architecture, independent of the backbone chemistry. By challenging the prevailing assumption that crystallinity is universally beneficial for charge transport, this work establishes design rules for developing OMIECs that combine high performance with compatibility for fabrication and sterilization processes involving high temperatures, paving the way for reliable, scalable bioelectronic devices.
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Journal articleLiu T, Silveri M, Liu Z, et al., 2026,
Gold-activated persulfate p-doping of organic semiconductors.
, Nat MaterChemical doping is crucial for fine-tuning the electronic properties of organic semiconductors (OSCs) and enhancing device performance across various technologies. While several methods for controlled dopant distribution have been explored, achieving lateral doping gradients via simple solution processing remains challenging. Here we present a gold-activated persulfate doping strategy in which persulfate is catalytically activated at gold surfaces to generate SO4•- radicals that locally oxidize (p-dope) the OSCs. This reaction creates a lateral doping gradient extending outwards from the gold interface, as verified by spectroscopic and electrical characterization. The approach is broadly applicable to OSCs spanning a 1.5-eV ionization potential range and yields conductivities >1,900 S cm-1. To demonstrate the impact of this method, we applied gold-activated persulfate doping to modulate contact regions in solution-processed organic field-effect transistors, achieving reduced contact resistance and improved charge-carrier mobility. This simple, scalable approach enables the formation of lateral doping gradients from solution and offers new opportunities for interfacial tuning in organic electronics.
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Journal articleYao Y, Shah MB, Lu W, et al., 2026,
Side-Chain Free Semiconducting Polymer for High-Performance n-Type Organic Electrochemical Transistors.
, J Am Chem Soc, Vol: 148, Pages: 9494-9503The development of organic electrochemical transistors (OECTs) critically depends on the design and characterization of mixed-conducting, high-performance conjugated polymers (CPs) as channel materials, particularly for n-type OECTs. In this study, we present a novel strategy to enhance the OECT performance of a semiconducting polymer film via a postdeposition ester pyrolysis of thermally cleavable side chains, thus facilitating ion incorporation and transport within the bulk. Our approach relies on the synthesis of a high glass-transition, rigid-rod polymer, able to withstand the pyrolysis temperature without deformation and maintain the voids formed from the pyrolysis reaction which removes the thermally cleavable ester side chains. After side-chain cleavage, the resulting film exhibits increased porosity, hydrophilicity, and crystallinity. By creating bulk porosity in thin films via this approach, ion diffusion is enhanced, resulting in a superior μC* figure of merit up to 158.85 F cm-1 V-1 s-1, and a corresponding increase in normalized transconductance (31.67 S cm-1). In addition, the device switching speed and long-term stability are also observed to increase, further demonstrating the benefit of nanoscale porosity for mixed conductivity semiconductors.
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Journal articleZhou Z, He Q, Tang CG, et al., 2025,
Multifunctional Electronics Enabled by Ion-Based Organic Electrochemical Transistor with Large Threshold Voltage Tunability Window
, ACS NANO, Vol: 19, Pages: 37865-37878, ISSN: 1936-0851 -
Journal articleDias NW, Rosa LHD, Saraiva F, et al., 2025,
ANÁLISE DA VARIAÇÃO POPULACIONAL NO BIOMA PANTANAL ENTRE 2010 E 2022 E O APRIMORAMENTO DA BASE TERRITORIAL DO IBGE PARA O ÚLTIMO CENSO
, RAEGA - O Espaço Geográfico em Análise, Vol: 63, Pages: 76-97, ISSN: 1516-4136<jats:p>Evidências científicas vêm demonstrando com clareza o intenso processo de degradação que o bioma Pantanal tem sofrido nos últimos anos. O objetivo desse artigo foi apresentar uma análise da dinâmica da população residente no território do bioma Pantanal a partir da comparação dos dados do Censo Demográfico 2010 e dos resultados já divulgados do Censo Demográfico 2022 considerando, também, as melhorias na representação geoespacial dos setores censitários no último censo. Os métodos descrevem o desenvolvimento e a aplicação do SIGBT na melhoria da malha de setores, a análise da variação no número de moradores nos setores rurais por meio de mapas de calor e a comparação direta do número de moradores, de homens e de mulheres nos dois censos. Os resultados mostram uma diversidade expressiva entre aumento e redução de moradores e de homens e mulheres no nível do setor censitário. A diminuição da população na área rural do Pantanal foi significativa na sua porção centro-norte, principalmente nos municípios de Corumbá, Barão de Melgaço e Aquidauana. A ocorrência de um fluxo populacional negativo nos setores censitários rurais localizados no bioma entre 2010 e 2022 e a incidência de seca prolongada associada a queimadas sem precedentes nos anos 2019 e 2020, podem indicar um possível impacto negativo desses eventos extremos na permanência dos moradores na área rural do Pantanal.</jats:p>
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Journal articleDias NW, Rosa LHD, Saraiva F, et al., 2025,
ANALYSIS OF POPULATION VARIATION IN THE PANTANAL BIOME BETWEEN 2010 AND 2022 AND THE IMPROVEMENT OF THE IBGE TERRITORIAL BASE FOR THE 2022 CENSUS
, RAEGA - O Espaço Geográfico em Análise, Vol: 63, Pages: 76-97, ISSN: 1516-4136<jats:p>Recent scientific evidence has elucidated the substantial degradation that the Pantanal biome has experienced in recent years. This study aims to provide an analytical examination of the population dynamics within the Pantanal biome by comparing data from the 2010 and 2022 Demographic Censuses, while also incorporating advancements in the geospatial representation of census tracts in the latter census. The methodology employed includes the development and application of SIGBT to improve the tract grid, the analysis of variations in the resident population of rural tracts using heat maps, and a direct comparative analysis of the total number of residents, as well as gender-specific populations, in both censuses. The findings indicate significant disparities in population increases and decreases, as well as variations between male and female residents at the census tract level. Notably, a pronounced decline in the rural population of the Pantanal was documented, particularly within the central-northern region, encompassing the municipalities of Corumbá, Barão de Melgaço, and Aquidauana. The observed negative population flow in rural census tracts between 2010 and 2022, coupled with the occurrence of prolonged droughts and unprecedented wildfires in 2019 and 2020, suggests a potentially detrimental effect of these extreme climatic events on the residential stability of the rural communities in the Pantanal biome.</jats:p>
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Journal articleAmmirati G, Turchini S, Toschi F, et al., 2025,
Electron-Hole Separation Dynamics and Optoelectronic Properties of a PCE10:FOIC Blend
, SMALL, Vol: 21, ISSN: 1613-6810 -
Journal articleWu X, Moro S, Marks A, et al., 2025,
Revealing polymerisation defects and formation mechanisms in aldol condensation for conjugated polymers via high-resolution molecular imaging
, NATURE COMMUNICATIONS, Vol: 16 -
Journal articleStein E, Simotko S, Yadav Y, et al., 2025,
Synergistic effects in ambipolar blends of mixed ionic-electronic conductors
, MATERIALS HORIZONS, Vol: 12, Pages: 5733-5748, ISSN: 2051-6347- Cite
- Citations: 1
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Journal articleSaid AA, Li X, Ugur E, et al., 2025,
Perovskite/Silicon Tandem Photovoltaics: Long-Term Stability through Interface Engineering
, ENERGY & FUELS, Vol: 39, Pages: 10134-10149, ISSN: 0887-0624- Cite
- Citations: 1
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Journal articleNayak PD, Ohayon D, Salvigni L, et al., 2025,
A polymeric mixed conductor-based solid state charge storage device
, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 13, Pages: 14335-14345, ISSN: 2050-7488 -
Journal articleOhayon D, Hamidi-Sakr A, Surgailis J, et al., 2025,
Impact of Noncompensating Ions on the Electrochemical Performance of n-Type Polymeric Mixed Conductors
, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 147, Pages: 12523-12533, ISSN: 0002-7863- Cite
- Citations: 4
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Journal articleLu W, Tait CE, Avci G, et al., 2025,
Cobalt-Embedded Metal-Covalent Organic Frameworks for CO<sub>2</sub> Photoreduction
, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 147, Pages: 9056-9061, ISSN: 0002-7863- Cite
- Citations: 8
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Journal articleScott J, Kludze A, Santamore M, et al., 2025,
Broadband THz Modulation via Solid-State Organic Electrochemical Devices
, ADVANCED MATERIALS, Vol: 37, ISSN: 0935-9648- Cite
- Citations: 3
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Conference paperAmmirati G, Catone D, Toschi F, et al., 2025,
Hole Transfer Dynamics and Optoelectronic Properties in PCE10:FOIC Blends for Organic Photovoltaics
, 12º nternational Conference on Hybrid and Organic Photovoltaics, Publisher: FUNDACIO DE LA COMUNITAT VALENCIANA SCITO
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