The Journal of Physical Chemistry C最新文献

{"title":"Metastable Porphyrin Assembly Engineered by Spatial Confinement for Amplified Built-In Electric Fields and High-Efficiency Photocatalytic Amino Acid Production","authors":"Fei Guan,&nbsp;Mingyang Lv,&nbsp;Xianggui Kong,&nbsp;Wenying Shi","doi":"10.1021/acs.jpcc.6c04958","DOIUrl":"10.1021/acs.jpcc.6c04958","url":null,"abstract":"<p>Enhanced charge-separation efficiency is fundamentalto advancingorganic photocatalytic production of high-value amino acids from biomassfeedstocks, which can be promoted by strengthening built-in electricfields (IEF). Yet, current approaches to boost IEF, relying on molecular-scaledesign, still cannot precisely control π-π stacking architecture,which is crucial for efficient exciton dissociation and charge-carrierextraction. Herein, the metastable Zn porphyrin living supramolecularassembly (LSA) is fabricated via layered double hydroxide. The confinementtriggers highly ordered π-π stacking (spacing 3.31 Å),significantly strengthening IEF to 4.52 times that of crystallineZn-TCPP, achieving a charge-separation efficiency of 51.7%, leadingto an enzyme-free photocatalytic alanine generation rate of 103.74μmol·g^–1·h^–1.Mechanism studies confirm photogenerated holes oxidize lactic acidto pyruvate, while exposed Zn active sites mediate electron-drivenreductive amination. This confinement supramolecular strategy offersa facile route to high-performance porphyrin photocatalysts and advancessustainable sunlight-powered amino acid manufacturing.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14162–14173"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149090997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic Scale Origin of the OER Activity–Stability Trade-Off in NiFe Layered Double Hydroxides: Lattice-Site Oxygen Triggers Fe Leaching","authors":"Liancong Xu,&nbsp;Zhuoyang Xie,&nbsp;Jin Liu,&nbsp;Xia Chen,&nbsp;Linping Hu,&nbsp;Rui Wu,&nbsp;Jiawei Liu,&nbsp;Li Li,&nbsp;Zidong Wei","doi":"10.1021/acs.jpcc.6c05263","DOIUrl":"10.1021/acs.jpcc.6c05263","url":null,"abstract":"<p>NiFelayered double hydroxide (NiFe-LDH) is a representative non-precious-metalcatalyst for the alkaline oxygen evolution reaction (OER), yet itslong-term stability is compromised by Fe leaching under OER conditions.Herein, using density functional theory calculations and constant-potentialab initio molecular dynamics simulations, we provide an atomic-scaleunderstanding linking high OER activity to the origin of Fe leaching.We reveal that the OER on the reconstructed active NiFeOOH phase preferentiallyfollows an adsorbate-site/lattice-site oxygen coupling (ALOC) mechanism,achieving a theoretical overpotential as low as 0.29 V. Notably, thecoupled structure that enables this high OER activity also drivesthe accumulation of oxygen vacancies. We identify the reconstructeddouble-oxygen-vacancy structure, formed through solvation-assistedinterfacial reconstruction, as the precursor for Fe leaching. Subsequently,an OH^–-assisted coordination/substitution pathwayat undercoordinated Fe sites progressively disturbs the octahedralcoordination structure, leading to Fe leaching as a tetrahedral FeO₄H species with a rate-determining barrier of 1.05 eV. Thesefindings elucidate how lattice-site-oxygen-involved OER catalysisinherently triggers Fe-leaching-induced deactivation and provide theoreticalguidance for stabilizing NiFe-LDH through oxygen-vacancy suppression,lattice-site oxygen regeneration, and local coordination environmentstrengthening.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14174–14183"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149092253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrafast Charge-Carrier Dynamics and Photocatalytic Mechanisms in Lanthanum-Doped Cerium Oxide Nanoparticles","authors":"Bach Pham,&nbsp;Claire A. Jones,&nbsp;Luke Kline,&nbsp;Meera Madhu,&nbsp;Bern Kohler","doi":"10.1021/acs.jpcc.6c05182","DOIUrl":"https://doi.org/10.1021/acs.jpcc.6c05182","url":null,"abstract":"<p>Cerium oxide nanoparticles (nanoceria) doped with trivalentlanthanum(La) ions and synthesized by a coprecipitation process at ambienttemperature were studied by steady-state and femtosecond transientabsorption spectroscopy to understand the photocatalytic mechanismsof this wide band gap photocatalyst in alkaline aqueous solution.UV irradiation reduces a significant fraction of cerium ions nearthe surface to Ce³⁺ centers that persist for hours in air.La doping increases the percentage of cerium ions that can be photoreduced,while also increasing the rate of photocatalytic degradation of anadded dye molecule. Adding methanol eliminates dye photodegradation,showing that photogenerated hydroxyl radicals are the active species.Unexpectedly, the transient spectral signatures and dynamics of photogeneratedelectrons and holes are nearly unaffected by La doping. Fewer electronsmall polarons are formed in the La-doped nanoceria, but the dynamicsof electron–hole recombination are unchanged during the 0–3ns window probed. Furthermore, electrons and holes recombine accordingto a power law with an exponent that is inversely proportional tothe Urbach energy determined from the steady-state absorption spectrum.These results are explained by a model in which a crystalline coreof cerium oxide that lacks oxygen vacancies is surrounded by a defectiveshell that likely consists of an amorphous hydrous oxide phase containingCe and La ions. The recombination of carriers trapped in this shellis unchanged on subnanosecond time scales, and La doping is proposedto enhance photocatalytic performance by enabling more holes to escapeinto the solvent via slow surface reactions.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14248–14259"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vitrification of Molten Chloride Salts","authors":"Ellie M. Kim,&nbsp;Phillip W. Halstenberg,&nbsp;Xin Wang,&nbsp;Dmitry Maltsev,&nbsp;Shannon M. Mahurin,&nbsp;Aaron G. Penders,&nbsp;Kaustubh Bawane,&nbsp;James F. Wishart,&nbsp;Sheng Dai","doi":"10.1021/acs.jpcc.6c03825","DOIUrl":"10.1021/acs.jpcc.6c03825","url":null,"abstract":"<p>Vitrification of molten chloride salts offers a novelapproachfor preserving their liquid-phase structure as amorphous solids, enablinganalysis of liquid structure at room temperature. However, vitrifyingmolten salts composed of simple salts (e.g., NaCl, KCl) has remaineda significant technical challenge due to their strong tendency tocrystallize. In this study, a nebulizer was used to successfully vitrifya KCl–MgCl₂ mixture for the first time. Powder X-raydiffraction (pXRD) analysis confirmed a substantial reduction in crystallinity,indicating enhanced amorphization of the quenched salts. Four-dimensionalscanning transmission electron microscopy (4D-STEM) revealed retentionof the amorphous state. Raman spectroscopy confirmed the persistenceof tetrahedral [MgCl₄]^2– motifs in theroom-temperature solids, demonstrating preservation of molten-statestructural features in the vitrified phase. This work represents acritical advancement in molten salt vitrification, providing a newpathway for structural studies and informing future applications inmolten salt reactors and high-temperature chemical processes.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14307–14311"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148974142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum Defect Density Controls Carbon Nanotube Sensor Sensitivity via Photophysical Cooperativity","authors":"Valeriia D. Andreeva,&nbsp;Chen Ma,&nbsp;Jiaqi Li,&nbsp;Juliana Gretz,&nbsp;Jennifer M. Mohr,&nbsp;Sebastian Kruss","doi":"10.1021/acs.jpcc.6c04661","DOIUrl":"10.1021/acs.jpcc.6c04661","url":null,"abstract":"<p>Single-walled carbon nanotubes (SWCNTs) fluoresce inthe near-infrared(NIR), overlapping with the biological transparency window. Therefore,SWCNTs are used as versatile materials for (bio)photonics. Controlledcovalent functionalization of SWCNTs with quantum defects (QDs) createscolor-center carbon nanotubes (CCNTs) with red-shifted additionalemission features and increased overall emission. QDs represent anew chemical dimension for sensing. However, it is unclear how thenumber of QDs affects sensor properties such as sensitivity or dynamicrange. Here, we develop an NIR fluorescent ratiometric pH sensor basedon benzoic acid QDs. We vary the amount of QDs in (6,5)-chirality-enrichedCCNTs and demonstrate that the amount of pH-sensitive QDs does notaffect the dynamic range of the nanosensor (pH approximately 6.8–7.9),but influences the sensitivity (ratiometric response <em>E</em>₁₁*/<em>E</em>₁₁) by more than 100%.We attribute this impact of defect density on sensing to positivephotophysical cooperativity between QDs, while the dissociation constantof the (<em>pK</em>_<em>a</em>) of the quantumdefect determines the dynamic range of the sensor. These pH-sensitiveCCNTs can be incorporated into agar hydrogels for ratiometric (1130nm/990 nm) pH imaging. Overall, we show that the number of QDs isan efficient tool to tune the sensitivity of fluorescent sensors.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14241–14247"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149090588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interconvertible Helical Adsorption of Triptycene-Phenazine Molecules on Carbon Nanotubes Driven by Interfacial Interactions","authors":"Shuji Nagata,&nbsp;Taiji Nakamura,&nbsp;Shunji Bandow,&nbsp;Kunio Awaga,&nbsp;Takashi Yumura","doi":"10.1021/acs.jpcc.6c02705","DOIUrl":"10.1021/acs.jpcc.6c02705","url":null,"abstract":"<p>Hybrid structures composed of triptycene–phenazine(Trip-Phz)molecules and carbon nanotubes have been experimentally reported toexhibit unique electrochemical properties; however, their molecular-levelstructures remain unclear. In this study, we investigate the adsorptionstructures and energetics of Trip-Phz molecules on carbon nanotubesusing dispersion-corrected density functional theory (DFT) calculations.The calculations reveal that interfacial π–π interactionsbetween Trip-Phz molecules and the nanotube are stronger than intermolecularπ–π interactions, leading to the preferential formationof a directly attached first adsorption layer. Within this layer,molecular orientations are governed by intermolecular CH···Nhydrogen bonds, resulting in three nearly isoenergetic adsorptionconfigurations characterized by rotation angles of approximately 20°,45°, and 85°. The two lowest-energy configurations, withrotation angles of approximately 20° and 45°, are separatedby a relatively small activation barrier, suggesting that they arereadily interconvertible under ambient conditions. As the number ofadsorbed molecules increases, these rotational relationships are preserved,giving rise to helical adsorption structures that are additively stabilizedby interfacial and intermolecular interactions. For adsorption onnanotube bundles, structures with the smallest rotation angle (∼20°)are energetically favored. Importantly, the interfacial interactionsdisrupt the ideal hydrogen-bonded honeycomb network observed in thecrystal structure, leading to nonuniform molecular arrangements withunpaired nitrogen atoms. This structural feature enables proton accommodationand provides a molecular-level explanation for the experimentallyobserved electrochemical properties.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14277–14288"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149049367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-Consistent Diagrammatic Theory of Energy Migration and Trapping on Spherical Nanoparticles","authors":"Leszek Kułak,&nbsp;Piotr Bojarski","doi":"10.1021/acs.jpcc.6c02025","DOIUrl":"10.1021/acs.jpcc.6c02025","url":null,"abstract":"<p>We present, for the first time, a comprehensive theoreticalmodelthat elucidates multistep energy migration, including its remigrationin the donor ensemble, followed by nonradiative excitation transferto acceptors, on a finite-radius spherical nanoparticle labeled withboth donors and acceptors. Using a three-body diagrammatic method,we derive the most general expressions for donor fluorescence decayand emission anisotropy decay. These expressions account for the intricatedynamics of energy transfer processes within the nanoparticle environment.To validate our theoretical framework, we performed extensive MonteCarlo simulations on a representative donor–acceptor systempositioned on a spherical nanoparticle. These simulations thoroughlyevaluate the model predictions across varying donor and acceptor configurations.The theoretical predictions and Monte Carlo results show excellentagreement, demonstrating the model’s accuracy in capturingthe complex dynamics of energy migration and transfer. This studyadvances our understanding of energy transfer in nanoscale systemsand highlights the power of combining theoretical modeling with MonteCarlo simulations to predict the optical properties and dynamics ofnanoparticle-based donor–acceptor assemblies, and shows a clearadvantage over the simplified model based on Padé approximant.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14209–14219"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149090625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Situ DRIFTS and Modulation–Excitation Studies for CO2 Hydrogenation on Nanostructures of CeO2: Unraveling the Dynamic Nature of CO2↔Hydroxylated-Ceria Interfaces","authors":"Yuxi Wang,&nbsp;Kaixi Deng,&nbsp;Jorge Moncada,&nbsp;Xiaobo Chen,&nbsp;Hongda Zhu,&nbsp;Juan J. Bravo-Suárez,&nbsp;Arturo Martínez-Arias,&nbsp;José A. Rodriguez","doi":"10.1021/acs.jpcc.6c04833","DOIUrl":"https://doi.org/10.1021/acs.jpcc.6c04833","url":null,"abstract":"<p>A combination of DRIFTS and transient studies with ModulationExcitationand Phase Sensitive Detection (ME-PSD) was used to study the hydrogenationof CO₂ on ceria nanocubes and nanospheres. Up to five differenttypes of OH groups were produced after the reaction of molecular H₂ with the ceria nanostructures at a temperature of 250 °Ctypically used in catalytic processes. The formation of these OH groupsinduced morphological changes in the ceria nanostructures that affectedthe adsorption of CO₂ and influenced reaction paths forthe reverse water–gas shift (RWGS) reaction (CO₂ + H₂ → CO + H₂O). The behavior of surfaceadsorbates and hence the associated reaction mechanisms were foundto be highly morphology dependent, reflecting the dynamic nature ofthese CO₂↔hydroxylated-ceria interfaces. In general,the reaction of CO₂ with OH groups produced a rich setof formate and hydroxycarbonate species, and the existence of surfaceOH groups affected the stability of regular carbonates formed by thereaction of CO₂ with O centers of the oxide substrates.In transient or ME-PSD studies, performed with the exposure of theceria nanostructures to CO₂/H₂ mixtures at 250°C, hydrogen carbonates and formates were identified as dynamicspecies in adsorption/desorption processes that have a limited contributionto the RWGS reaction. On both catalytic surfaces, hydroxyl groupsand carbonate adsorbates initially experienced a rapid, kineticallycontrolled reduction (OH_adsorbed + 0.5H_2,gas → O_vacancy + H₂O_gas) andoxidation (CO_3,ads + O_vacancy→ CO_gas + 2O_oxide) process that was part of the RWGSreaction. The ceria nanocubes had an additional reaction pathway,where direct carbonate decomposition, involving the transformationof transient and surface tridentate carbonates, enhanced the RWGSrate. Overall, these results illustrate the tremendous impact thathydrogen can have on the adsorption and reaction of CO₂ with oxide surfaces and strongly emphasize the need to considerdifferent oxide nanostructures to successfully optimize the performanceof CeO₂-based catalysts for CO₂ hydrogenation.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14146–14161"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiferroic Semiconducting Behavior in Quasi-2D Cu-Based Hybrid Perovskites","authors":"P. Biswal,&nbsp;Vikas,&nbsp;Ratnamay Kolay,&nbsp;Subhashis Ghosh,&nbsp;Amlandeep Nayak,&nbsp;Goutam Tripathy,&nbsp;Satyaprasad P. Senanayak,&nbsp;Ramesh Chandra Nath,&nbsp;Parthapratim Munshi,&nbsp;Debakanta Samal,&nbsp;Diptikanta Swain","doi":"10.1021/acs.jpcc.6c04839","DOIUrl":"10.1021/acs.jpcc.6c04839","url":null,"abstract":"<p>Developing multifunctional materials is crucial for overcomingthe limitations of conventional technological scaling. Intrinsic multiferroicsemiconductors are especially attractive because they integrate magnetic,ferroelectric, and semiconducting functionalities within a singlematerial. Here, we demonstrate the intrinsic multiferroic semiconductingbehavior and ligand tunability in two quasi-two-dimensional (2D) organic–inorganichybrid perovskites, (C₇H₉NBr)₂CuX₄ (X = Cl, Br). Ferromagnetism arises from Cu²⁺ ions,while the 4-bromobenzylammonium spacer breaks the inversion symmetry,generating ferroelectricity. Long-range magnetic order emerges below10 and 15 K for the Cl and Br analogs, respectively, corroboratedby the heat capacity anomalies and low-temperature magnon contributions.Both compounds exhibit room-temperature ferroelectricity, establishingthem as type-I multiferroics. Transport measurements reveal hole mobilitiesof ∼10^–4 cm² V^–1 s^–1, comparable to those of 2D perovskite semiconductors.Furthermore, the photoinduced dielectric enhancement across the fullfrequency range highlights their optoelectronic potential. These resultsexpand the family of intrinsic multiferroic semiconductors and providea platform for realizing multifunctional properties.</p>","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"130 41","pages":"14351–14362"},"PeriodicalIF":3.4,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149090586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stoichiometry Control\u0000Reveals Compensating Donor-Type\u0000Defects Limiting Minority-Carrier Lifetime in Cu2O","authors":"Kosuke Matsuzaki,Thi Ngoc Huyen Vu,Shota Nunomura,Hitoshi Tampo,Takehiko Nagai,Yu Kumagai","doi":"10.1021/acs.jpcc.6c04604","DOIUrl":"https://doi.org/10.1021/acs.jpcc.6c04604","url":null,"abstract":"Abstract The minority-carrier lifetime of Cu2O has been limited to a few nanoseconds or less, constraining its photovoltaic and photoelectrochemical performance, yet the origin of this rapid recombination remains incompletely understood. We tune the Cu/O stoichiometry of large-grained polycrystalline Cu2O plates across its phase stability region by postannealing under controlled oxygen partial pressures (PO2) between the Cu-rich limit (near Cu precipitation) and the Cu-poor limit (near CuO formation). The minority-carrier lifetime increases by more than an order of magnitude, from 0.7 ns at the Cu-rich limit to 28 ns at the Cu-poor limit. The corresponding diffusion length reaches the micrometer scale, comparable to absorber thicknesses in Cu2O devices. This enhancement occurs despite the higher hole concentration at the Cu-poor limit, where a shorter lifetime would conventionally be expected. Time-resolved photoluminescence, subgap photocurrent spectroscopy, and first-principles calculations link the short lifetime under Cu-rich conditions to donor-type Cu interstitials, which act as compensating defects and are accompanied by stronger subgap absorption and increased band-edge disorder. In contrast, both are suppressed toward the Cu-poor limit, consistent with the observed lifetime trend. These results show that the recombination behavior cannot be explained by a model based on abundant acceptor-type copper vacancies. Suppressing compensating donor-type defects through stoichiometry control therefore offers a route to extending the minority-carrier lifetime in Cu2O and may also be relevant to other compensated semiconductors.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":"27 1","pages":""},"PeriodicalIF":4.126,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}