Journal of Materials Chemistry C最新文献

{"title":"Extremely durable supercapacitor enabled by disordered porous carbon with a capacity retention up to 60 000 cycles†","authors":"Yu Ma, Chenmiao Ma, Jingya Wang, Xiaoqing Gao, Zepeng Li and Yingdong Han","doi":"10.1039/D4TC04734F","DOIUrl":"https://doi.org/10.1039/D4TC04734F","url":null,"abstract":"<p >Carbon-based materials, known for their green sustainability and high specific surface area, have long been favored as electrode materials with commercial prospects. However, they often fall short of delivering the expected performance in areas such as electrical conductivity and cycle stability. This paper reports a porous carbon material formed by combining NaCl crystals and citric acid. Relying on the hard template configuration, the molten pore-forming of NaCl crystals causes the citric acid base material to produce disordered porous carbon. Structural characterization and performance testing reveal that after high-temperature carbonization, the material generates numerous mesopores due to the evaporation etching of NaCl and has amorphous carbon with a highly disordered and dense structure. The resulting high specific surface area and abundant defects endow it with highly efficient electrochemical performance. Moreover, an enhanced specific capacitance of 81 F g<small>⁻¹</small> at a current density of 0.5 A g<small>⁻¹</small> and high capacitance retention rate of 98% after 60 000 cycles of the synthesized supercapacitor were obtained. This research offers a new avenue for the development of green energy and the design of electrode materials with commercial potential.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4429-4434"},"PeriodicalIF":5.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochromic fabrics with improved cycling stability via modified polyaniline towards environmentally adaptive camouflage†","authors":"Mingyu Ding, Wanzhong Li, Ang Li, Yuhao Wang, Jingbing Liu, Qianqian Zhang and Hao Wang","doi":"10.1039/D4TC04683H","DOIUrl":"https://doi.org/10.1039/D4TC04683H","url":null,"abstract":"<p >Electrochromic (EC) fabrics based on conductive polyaniline (PANI) have demonstrated important application potential in the field of active camouflage due to their ability to reversibly switch color between yellow and green, while their practical applications are greatly limited by their poor cycling performance. Here, a modified EC PANI is developed to achieve long-term stable optical modulation through well-designed anion doping, which optimizes the energy levels and also the microstructures. The modified PANI exhibits an improved cycling performance and could achieve a high optical retention rate of 78% even after 6500 cycles and much higher than that of pristine PANI (6.7%). Also, the EC fabric equipped with modified PANI exhibits excellent cycling performance (900 cycles). Furthermore, the EC fabrics are developed into a self-powered environmentally adaptive camouflage system to show real-world applications in active camouflage.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4673-4682"},"PeriodicalIF":5.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring intraband transition via composition in self-doped Ag2SxSey alloy nanocrystals†","authors":"Youngjo Choi, Haemin Song, Gyu Ho Song, Hee Kwon Kim, Yoon Seo Jung, Hyeong Seok Kang, Woong Kim and Kwang Seob Jeong","doi":"10.1039/D4TC04646C","DOIUrl":"https://doi.org/10.1039/D4TC04646C","url":null,"abstract":"<p >Various optoelectronic devices heavily depend on the interband transitions in their materials, thereby restricting material choice based on the band gap. Hence, an investigation of intraband transitions, which involve electronic states within each band, holds the potential to broaden the range of material choice significantly and contribute to the development of innovative optoelectronic devices. Notably, stable mid-infrared intraband transitions have been observed in several colloidal quantum dots (CQDs), mostly toxic to date. However, the active tuning of the intraband transitions of CQDs, especially <em>via</em> composition, remains largely unexplored. To address this knowledge gap, the active control of intraband transitions in non-toxic Ag<small>₂</small>S<small>_<em>x</em></small>Se<small>_<em>y</em></small> alloy CQDs is demonstrated for the first time herein. This demonstration is expected to make a substantial contribution to the design of new materials for intraband transitions, thereby broadening the selection of materials available for intraband optoelectronic devices.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4709-4715"},"PeriodicalIF":5.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing efficiency in organic electronics via J-aggregation modulation with non-halogenated solvents†","authors":"Guangting Cai, Zhenmin Zhao, Sein Chung, Liang Bai, Lixing Tan, Xin Li, Jingjing Zhao, Yuan Liu, Kilwon Cho and Zhipeng Kan","doi":"10.1039/D4TC05207B","DOIUrl":"https://doi.org/10.1039/D4TC05207B","url":null,"abstract":"<p >Aggregation of the donor and acceptor is crucial for determining the phase separation in the active layer, which constrains the performance of organic optoelectronics. Herein, we focused on the molecular aggregation modulation in the active layer comprising PM6:GS-ISO, which was processed using non-halogenated solvents. The findings reveal that employing <em>o</em>-xylene (O-XY) as a solvent predominantly modulates the J-aggregation of the acceptor. Using 1,8-diiodooctane (DIO) as the processing additive, we can effectively adjust the donor's J-aggregation, optimizing phase separation and improving molecular ordering. Remarkably, a precise phase segregation and optimized donor–acceptor distribution effectively minimized trap-assisted recombination and substantially enhanced charge collection efficiency. Finally, organic solar cells (OSCs) processed with DIO achieved a power conversion efficiency (PCE) of 26.56% under indoor light, while organic photodetectors (OPDs) attained an impressive specific detectivity of 7 × 10<small>¹²</small> cm Hz<small>^1/2</small> W<small>⁻¹</small>. Our results offer valuable insights into modulating phase separation using a co-aggregation strategy for high-performance organic photovoltaics.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4421-4428"},"PeriodicalIF":5.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unlocking Mo, P co-doping to boost proton intercalation in MnO2 as a high-performance cathode material for aqueous zinc-ion batteries†","authors":"Kaixuan Ma, Guangfeng Liang, Qingze Jiao, Haibo Jin, Yuefeng Su, Ning Li, Jingbo Li, Zhiyong Xiong, Caihong Feng and Yun Zhao","doi":"10.1039/D4TC04556D","DOIUrl":"https://doi.org/10.1039/D4TC04556D","url":null,"abstract":"<p >Manganese-based oxides, with various oxidation states and crystal structures, are treated as one of the most brilliant zinc storage cathode materials in aqueous zinc ion batteries (AZIBs). However, the practical application of manganese-based oxide cathode materials is still limited by poor structural stability, slow diffusion kinetics, and inherently low conductivity. In this paper, anionic and cationic Mo, P co-doped MnO<small>₂</small> (Mo, P–MnO<small>₂</small>) nanoflowers are constructed as cathode materials for AZIBs. Theoretical calculations imply that Mo, P co-doping enlarges the layer spacing to accelerate ion transport, as well as reducing the insertion energy of H<small>⁺</small> to increase the intercalation contribution of H<small>⁺</small>. These synergistic effects enhance the structural stabilization and reaction kinetics of the Mo, P–MnO<small>₂</small> electrode during cycling. As a result, the Mo, P–MnO<small>₂</small> electrode showed excellent rate capacity (146.6 mA h g<small>⁻¹</small> at 5 A g<small>⁻¹</small>), and cycling stability (retaining a capacity of 216 mA h g<small>⁻¹</small> after 1100 cycles at 1 A g<small>⁻¹</small>). The concepts introduced in this study promise a fantastic guarantee for the development of elevated-performance oxide-based energy repository materials.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4727-4736"},"PeriodicalIF":5.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction of pressure-induced superconductivity in the ternary systems CaYH2n (n = 3–6) at moderate pressures†","authors":"Jinghong Zhao, Bole Chen, Shichang Li, Ying Chang, Xu Yang, Mingyu Chen and Dengfeng Li","doi":"10.1039/D4TC03987D","DOIUrl":"https://doi.org/10.1039/D4TC03987D","url":null,"abstract":"<p >Hydrogen-rich ternary compounds are regarded as promising candidates for room-temperature superconductivity, primarily due to the synergistic effects of their crystal structures and electronic properties under high-pressure conditions. However, the vast chemical space of these compounds is vast, making its exploration particularly challenging. In this study, we explore the high-pressure structures, electronic characteristics, and superconducting behavior of the ternary calcium–yttrium–hydrogen (Ca–Y–H) system using a predictive approach that combines particle swarm optimization (PSO) with first-principles calculations. Our research identifies four stable structures, each characterized by a unique hydrogen sublattice arrangement: <em>Pmmm</em>-CaYH<small>₆</small>, <em>P</em>4/<em>mmm</em>-CaYH<small>₈</small>, <em>Cmmm</em>-CaYH<small>₁₀</small>, and <em>Fd</em><img><em>m</em>-CaYH<small>₁₂</small>. All predicted Ca–Y–H structures exhibit characteristics of high-temperature superconductors. The electron localization function (ELF) analysis reveals no significant interaction between hydrogen atoms in the CaYH<small>₆</small> compound, while the other stoichiometric compositions show weak H–H covalent interactions. Notably, CaYH<small>₆</small> maintains dynamic stability even at ambient pressure and exhibits a high superconducting critical temperature (<em>T</em><small>_c</small>) of 60 K. At an elevated pressure of 100 GPa, the pressure-stabilized CaYH<small>₈</small> and CaYH<small>₁₀</small> structures demonstrate high <em>T</em><small>_c</small> values of 90 K and 108 K, respectively. With further increased hydrogen content, CaYH<small>₁₂</small> remains dynamically stable up to 150 GPa and exhibits a remarkable <em>T</em><small>_c</small> of 225 K. Furthermore, this study discusses how phonon softening in the mid-frequency region, primarily induced by Fermi surface nesting, effectively enhances electron–phonon coupling.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 8","pages":" 4128-4136"},"PeriodicalIF":5.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of bipolar charge transport of derivatives of 1-phenyl-1H-benzo[d]imidazole with horizontal molecular orientation on the performance of OLEDs based on thermally activated delayed fluorescence or phosphorescence†","authors":"Simas Macionis, Ehsan Ullah Rashid, Jurate Simokaitiene, Rita Butkute, Oleksandr Bezvikonnyi, Dmytro Volyniuk, Dalius Gudeika, Tien-Lung Chiu, Jiun-Haw Lee, Zi-Wen Su, Chia-Hsun Chen, Ruta Budreckiene, Mariia Stanitska, Oleksandr Navozenko and Juozas V. Grazulevicius","doi":"10.1039/D4TC04802D","DOIUrl":"https://doi.org/10.1039/D4TC04802D","url":null,"abstract":"<p >The synthesis and properties of two derivatives of 1-phenyl-1<em>H</em>-benzo[<em>d</em>]imidazole with differing numbers of <em>tert</em>-butylcarbazole electron-donating moieties are reported. The compounds exhibit high thermal stability, with 5% weight loss temperatures exceeding 341 °C and glass transition temperatures of over 149 °C. They display moderate triplet energies of 2.63 and 2.66 eV. The synthesized compounds were employed as host materials in phosphorescence and TADF-based organic light-emitting diodes (OLEDs). An investigation of the angle-dependent emission intensity of light-emitting layers containing the phosphorescent emitter Ir(ppy)<small>₂</small>(acac) doped into the examined compounds revealed a notably high internal outcoupling efficiency in OLEDs, exceeding 30%. This efficiency is attributed to the significant horizontal molecular orientation factor, reaching up to 87%. Based on the characterization of the hosting properties of 1-phenyl-1<em>H</em>-benzo[<em>d</em>]imidazole derivatives, the most significant influence on device performance is attributed to their charge-transporting properties. An OLED with the phosphorescent emitter Ir(ppy)<small>₂</small>(acac) and a host material exhibiting bipolar charge transport demonstrated an external quantum efficiency of 13%. Additionally, the picric acid sensitivity of one of the compounds was examined. Triplet-facilitated emission was completely quenched upon the addition of a nitroaromatic explosive as a guest in a film.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4749-4759"},"PeriodicalIF":5.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d4tc04802d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recrystallization of single crystal CsCu2I3 perovskites by I2 treatment for enhanced UV detecting abilities†","authors":"Fa Cao, Guanyu Cheng, Enliu Hong, Ying Liu, Sancan Han, Pingping Yu and Bin Sun","doi":"10.1039/D4TC04849K","DOIUrl":"https://doi.org/10.1039/D4TC04849K","url":null,"abstract":"<p >Single crystal copper halide perovskites (CsCu<small>₂</small>I<small>₃</small>) have gained extensive interest due to their nontoxic composition and superior ultraviolet (UV) photodetecting abilities. However, the surface defects of single crystal CsCu<small>₂</small>I<small>₃</small>, especially iodine (I) defects, limit its further improvement of photodetecting performance. Here, single crystal CsCu<small>₂</small>I<small>₃</small> halides with a length of 1.6 cm are initially prepared by an anti-solvent vapor-assisted approach. The recrystallization and reduction of I vacancies of single crystal materials were realized by annealing them under an I<small>₂</small> vapor atmosphere, displaying a clear (<em>ll</em>0) orientation. Compared with original CsCu<small>₂</small>I<small>₃</small>, the on/off ratio of I<small>₂</small> treated CsCu<small>₂</small>I<small>₃</small> is enhanced 9.1 times with a value increased from 181 to 1655. Specifically, an I<small>₂</small> treated UV photodetector exhibits narrowband responsivity with a FWHM of ∼50 nm, high detectivity (3.1 × 10<small>¹¹</small> Jones), and fast response speed (rise time: 0.11 ms and decay time: 1.89 ms) at 370 nm (light intensity: 2.8 mW cm<small>⁻²</small>). The approach of treating I-based perovskites under an I<small>₂</small> atmosphere may have great application prospects in the field of optoelectronics.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4543-4548"},"PeriodicalIF":5.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Broadband nonlinear optical response and ultrafast carrier dynamics in defect-engineered Fe–Co3O4 for photonics","authors":"Linghao Kong, Hongwei Chu, Zhongben Pan, Han Pan, Shengzhi Zhao and Dechun Li","doi":"10.1039/D4TC04196H","DOIUrl":"https://doi.org/10.1039/D4TC04196H","url":null,"abstract":"<p >In this paper, Fe-doped Co<small>₃</small>O<small>₄</small> (Fe–Co<small>₃</small>O<small>₄</small>) with oxygen vacancy defects, derived from Fe-doped zeolitic imidazolate framework-67 (ZIF-67), was successfully synthesized <em>via</em> high-temperature calcination and verified using several special characterization methods. Femtosecond-resolved transient absorption spectroscopy revealed that Fe–Co<small>₃</small>O<small>₄</small> exhibits ultrafast recovery times, with average fast and slow recovery times as short as 20 fs and 120 fs, respectively, which are faster than those of undoped Co<small>₃</small>O<small>₄</small>. This fast recovery time can be attributed to the numerous lattice defects introduced by Fe doping and oxygen vacancy defects, which result in the formation of a recombination central band state in the forbidden band, thereby accelerating the recombination process of electrons and holes. The nonlinear optical parameters of Fe–Co<small>₃</small>O<small>₄</small> are evaluated using a twin-balanced detector system and open (closed)-aperture Z-scan techniques. The excellent effective nonlinear absorption coefficient (<em>β</em><small>_eff</small>) and refractive index (<em>n</em><small>₂</small>) measured are −(0.84 ± 0.15) cm MW<small>⁻¹</small>, 0.94 cm<small>²</small> GW<small>⁻¹</small> at 1 μm, and −(0.61 ± 0.08) cm MW<small>⁻¹</small>, −0.6 cm<small>²</small> GW<small>⁻¹</small> at 1.5 μm, respectively. The broadband and exceptional nonlinear optical responses of Fe–Co<small>₃</small>O<small>₄</small> are closely associated with the further adjustment of the electronic structure by Fe doping and oxygen vacancy engineering. Using Fe–Co<small>₃</small>O<small>₄</small> as a saturable absorber, mode-locking pulse outputs with pulse widths of 444 fs, 910 fs, and 820 fs are realized at 1030.6 nm, 1561 nm, and 1899 nm, respectively. Overall, this work demonstrates an effective method for the design of high-performance nonlinear optical materials with a broadband functionality and fast recovery times.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4499-4510"},"PeriodicalIF":5.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reactive and decomposable dispersant for maximizing the properties of graphene composites†","authors":"Junshuo Cui, Xuening Du, Shiyi Liu, Liangyu Guo, Wanqi Liu and Ying Xiong","doi":"10.1039/D4TC03998J","DOIUrl":"https://doi.org/10.1039/D4TC03998J","url":null,"abstract":"<p >Homogeneous dispersion of graphene in liquid media is essential for the fabrication of graphene-based composites. However, commercially available surfactants are not satisfactory in practical applications, having neither good efficiency nor the possibility to be eliminated from the final composites, and thus could have negative effects. Herein, a new dispersant, di-silanol group-grafted thiophene-ethylenediamine (DSiTE), featuring reactivity and decomposition capability was developed. Graphene dispersion with a concentration of up to 4 mg mL<small>⁻¹</small> could be obtained at a DSiTE-to-graphene weight ratio of 1 : 1. The DSiTE molecule contains one thiophene core and six silanol groups, connected <em>via</em> a C<img>N bond. The bond can be broken through acid treatment, making it possible for the dispersant to be eliminated from the composite after fulfilling its primary task of dispersing graphene. The exclusive features of DSiTE make it ideally suitable for fabricating highly conductive carbon films. Experimental results showed that the conductivity of a graphene film improved by about 48% after treatment with 1 mol L<small>⁻¹</small> HCl. Moreover, because DSiTE possesses reactive silanol groups, it demonstrates mechanical enhancement in the case of the dispersant being preserved in the composite. The tensile strength of a graphene-coated paper increased by about 17% compared with that of an uncoated one. Overall, DSiTE showed superiority compared with commonly used conventional surfactants.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 9","pages":" 4716-4726"},"PeriodicalIF":5.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}