Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"S-scheme g-C3N4/Bi2MoO6 heterojunction for enhanced adsorption and visible-light photocatalytic removal of antibiotics: mechanistic insights and transformation pathways","authors":"Hongxia Zhang ,&nbsp;Junxin Huang ,&nbsp;Ming Zhong ,&nbsp;Fangzhen He ,&nbsp;Na Dong ,&nbsp;Bitao Su ,&nbsp;Ziqiang Lei","doi":"10.1016/j.jphotochem.2026.117098","DOIUrl":"10.1016/j.jphotochem.2026.117098","url":null,"abstract":"<div><div>To address the remediation needs of antibiotic-contaminated water, this study developed a highly efficient and stable novel photocatalyst. A 2D/3D S-scheme g-C₃N₄/Bi₂MoO₆ (CN/BMO) heterojunction was synthesized via a simple preparation method, with its core mechanism relying on the internal electric field (IEF) formed at the semiconductor interface. This field actively regulates the S-scheme charge transfer pathway, a process directly validated through a series of photoelectrochemical analyses: significantly quenched photoluminescence signals and shortened carrier lifetimes confirmed efficient interfacial recombination, while enhanced photocurrent responses and reduced electrochemical impedance indicated effective spatial separation of electron-hole pairs. The optimized carrier separation efficiency significantly improved the photocatalytic performance of the material. Under visible light irradiation, the degradation efficiency of tetracycline (TC) reached 85%, with degradation rates exceeding 80% for multiple antibiotic pollutants. Additionally, the material exhibited excellent stability in five consecutive cycling experiments. Mechanistic studies revealed that the synergistic effect of superoxide radicals (<span><math><mo>·</mo><msubsup><mi>O</mi><mn>2</mn><mo>−</mo></msubsup></math></span>) and photogenerated holes (h⁺) dominated the reaction process, as conclusively verified by electron paramagnetic resonance (EPR) spectroscopy. Degradation pathway analysis via mass spectrometry (MC-LS) demonstrated that TC primarily undergoes cleavage through demethylation, hydroxylation, and ring-opening reactions, with simultaneous assessment of the toxicity and ecological risks of reaction intermediates. This work provides new theoretical foundations and practical solutions for the photocatalytic removal of antibiotics in real water bodies.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117098"},"PeriodicalIF":4.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171632","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":"Manipulating room temperature phosphorescence properties: a dual strategy of halogen substitution and hydrostatic pressure","authors":"Jiaqiang Zhao ,&nbsp;Yuanyuan Xu","doi":"10.1016/j.jphotochem.2026.117110","DOIUrl":"10.1016/j.jphotochem.2026.117110","url":null,"abstract":"<div><div>Pressure-tunable room temperature phosphorescence (RTP) materials hold great promise for advanced optoelectronic applications. This work systematically explores the synergistic effects of halogen substitution and hydrostatic pressure (0–2.5 GPa) on the RTP properties of three model molecules (MPh, MPh-Cl, and MPh-Br) from a theoretical perspective. Through integrated structural analysis, electronic calculations, and excited-state dynamics simulations, we reveal that pressure progressively strengthens intermolecular halogen bonds (C-X···O, X = Cl, Br), which restrict molecular motion and enhance solid-state rigidity. Concurrently, pressure-induced geometric distortions in the S₁ state widen the S₁-T₁ energy gap, thereby suppressing reverse intersystem crossing (RISC) process. Notably, the spin-orbit coupling (SOC) constants and intersystem crossing (ISC) rates exhibit a non-monotonic pressure dependence: an initial decrease (0–0.5 GPa) due to improved planarity is followed by a significant increase (0.5–2.5 GPa) attributable to tighter packing and enhanced n-π* interactions. Among the series, MPh-Br achieves the highest SOC value, the fastest ISC rate, and the most efficient radiative decay rate, leading to superior RTP performance. These results provide fundamental insights into the interplay of chemical substitution and external pressure, offering clear design principles for stimuli-responsive phosphorescent materials.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117110"},"PeriodicalIF":4.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171714","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":"From solvent polarity to molecular packing: photophysical insights into newly synthesized pyridothienopyrimidinone derivatives","authors":"Safiyyah A.H. Al-Waleedy ,&nbsp;Esam A. Orabi ,&nbsp;Etify A. Bakhite ,&nbsp;Walid Sharmoukh ,&nbsp;Osama Younis","doi":"10.1016/j.jphotochem.2026.117087","DOIUrl":"10.1016/j.jphotochem.2026.117087","url":null,"abstract":"<div><div>A new series of pyridothienopyrimidinone derivatives (<strong>5a-i</strong>) was synthesized and structurally verified using elemental and spectral analyses. Their photophysical behaviors were systematically explored in various environments, across solvents of differing polarity (solvatochromism), in DMSO/water mixtures (Aggregation-induced emission, AIE), and in the solid state. Density functional theory calculations were also performed on these compounds to understand their photophysical properties. In DMSO, these compounds emitted blue–green fluorescence whose intensity and wavelength were strongly influenced by the substituents present. Solvatochromic analyses revealed bathochromic shifts in polar solvents, consistent with the presence of excited-state intramolecular charge transfer. AIE studies showed that compound <strong>5b</strong> exhibited a marked spectral transformation with increasing water fraction, while <strong>5c</strong> and <strong>5f</strong> retained their spectral profiles but displayed notable intensity changes. In the solid state, all derivatives produced strong, excitation-independent photoluminescence (PL), with emission maxima spanning from 460 nm (<strong>5b</strong>) to 517 nm (<strong>5a</strong>). These findings demonstrate the pivotal role of substituents in tuning emission color and efficiency. Comparisons between solution and solid-state PL further underscored the influence of aggregation and molecular packing on luminescence behavior. Collectively, these insights enhance the understanding of structure–property relationships in pyridothienopyrimidinones and underscore their potential optoelectronic applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117087"},"PeriodicalIF":4.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171672","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":"Charge compensation to enhance the performance of Mn4+-doped Ba3Al2F12 red phosphor and its applications in warm WLEDs and backlight LEDs","authors":"Wenjing Han ,&nbsp;Ying Jin ,&nbsp;Xiaoyi Liu ,&nbsp;Zhe Qiu ,&nbsp;Ruimin Zhang ,&nbsp;Shengda Liu ,&nbsp;Jiayin Zhan ,&nbsp;Guixia Liu ,&nbsp;Jinxian Wang ,&nbsp;Xiangting Dong","doi":"10.1016/j.jphotochem.2026.117063","DOIUrl":"10.1016/j.jphotochem.2026.117063","url":null,"abstract":"<div><div>Mn⁴⁺-activated fluoride phosphors have been widely recognized as critical performance-compensating materials for white light-emitting diodes (WLEDs), as they enable the emission of red light with high visibility. The Ba₃Al₂F₁₂: Mn⁴⁺ red phosphor synthesized in this work exhibited maximum emission intensity at 628 nm under 455 nm excitation, with an optimal Mn⁴⁺ doping concentration of 0.07. Upon introducing Zn²⁺ as a charge-compensation ion, the red emission intensity was enhanced by approximately 3.08 times. Furthermore, the luminescence intensity of this red phosphor remained at approximately 80% of its initial magnitude after being immersed in water for 6 h, which was about 20% higher compared to that of Ba₃Al₂F₁₂: Mn⁴⁺. Additionally, the thermal stability of the phosphor was systematically evaluated. When the temperature reached 473 K, the phosphor retained 85.56% of its initial luminescent intensity measured at 298 K, demonstrating a substantially enhanced thermal stability. When this red phosphor was integrated with blue chips and commercially available yellow phosphors into a lighting device, it demonstrated outstanding performance, highlighting its promising potential application in white light LEDs and backlight display technologies.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"476 ","pages":"Article 117063"},"PeriodicalIF":4.7,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171727","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":"Reinforced photodegradation of tetracycline by a novel 1D/3D Bi4V2O11/Bi5O7I heterojunction: Multi-electric field tuning via S-scheme charge migration and oxygen vacancy","authors":"Yurou Chen,&nbsp;Zhongquan Jiang,&nbsp;Fangyan Chen,&nbsp;Yanhua Song,&nbsp;Yubin Tang","doi":"10.1016/j.jphotochem.2026.117059","DOIUrl":"10.1016/j.jphotochem.2026.117059","url":null,"abstract":"<div><div>Construction of S-scheme heterojunctions, defect engineering, and design of surface dimension are all efficient methods for improving the photocatalytic property of semiconductors. In this work, a novel 1D/3D Bi₄V₂O₁₁/Bi₅O₇I heterojunction with a synergistic modulation of oxygen vacancies (OVs) and an S-scheme charge migration was constructed. The fabricated Bi₄V₂O₁₁/Bi₅O₇I heterojunction was applied in the photodegradation of tetracycline (TC) under visible-light illumination. Bi₄V₂O₁₁/Bi₅O₇I exhibits significantly reinforced photocatalytic performance relative to the pristine Bi₄V₂O₁₁ and Bi₅O₇I. Among various Bi₄V₂O₁₁/Bi₅O₇I composites with different mass ratios, the optimal composite 20BB with a Bi₄V₂O₁₁ mass fraction of 20% exhibits the highest photocatalytic activity, achieving a TC degradation efficiency of 89%. The first-order kinetic constant (2.325 × 10⁻² min⁻¹) of 20BB is 6.3 and 3.8 times higher than those of Bi₄V₂O₁₁ and Bi₅O₇I, respectively. The enhanced photocatalytic activity originates from three aspects. Firstly, the multi-electric field modulation of OVs and S-scheme charge transfer greatly accelerated the migration of photogenerated carriers. Secondly, S-scheme charge transfer mode exploited the electrons and holes with the strongest redox capability. Thirdly, OVs modification and unique 1D/3D hierarchical heterostructure improved visible-light absorption, and 1D/3D hierarchical heterostructure increased the active sites. Additionally<strong>,</strong> Bi₄V₂O₁₁/Bi₅O₇I has good stability, showing no obvious change in TC removal efficiency or crystal structure after multiple cycles. The environmental factor exerts minor impacts to the activity of Bi₄V₂O₁₁/Bi₅O₇I. H⁺, ·O₂⁻, and ·OH are the reactive species responsible for the photocatalysis process. This work offers an insight into designing high-performance composite photocatalysts by the aid of multi-field modulation strategy.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117059"},"PeriodicalIF":4.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146078218","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":"3-(Difluoromethyl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidines achieved by sequential formylation/difluorination reactions: Synthesis, optical properties, BSA bio-interactions, and molecular docking","authors":"Juliane N. Araújo ,&nbsp;Felipe S. Stefanello ,&nbsp;Érica O.T. Machado ,&nbsp;Fábio M. Luz ,&nbsp;Fabiane Gritzenco ,&nbsp;Pablo A. Nogara ,&nbsp;Marcos A.P. Martins ,&nbsp;Nilo Zanatta ,&nbsp;Victor Deflon ,&nbsp;Bernardo A. Iglesias ,&nbsp;Helio G. Bonacorso","doi":"10.1016/j.jphotochem.2026.117024","DOIUrl":"10.1016/j.jphotochem.2026.117024","url":null,"abstract":"<div><div>This paper describes the synthesis and optical properties of a novel series of six examples of 5-aryl(heteroaryl)-3-difluoromethyl-7-(trifluoromethyl)-2-methylpyrazolo[1,5-<em>a</em>]pyrimidines (<strong>5</strong>), which is obtained through a sequential synthetic process. Initially, a Vilsmeier-Haack formylation reaction functionalized the 3-position of 5-aryl(heteroaryl)-7-(trifluoromethyl)-2-methylpyrazolo[1,5-<em>a</em>]pyrimidines (<strong>3</strong>), giving the 3-formyl derivatives (<strong>4</strong>) at yields of 60–91 %. Subsequently, the difluorination of aldehydes (<strong>4</strong>) using diethylaminosulfur trifluoride (DAST) converted the CHO function into the CHF₂ group, resulting in yields of 40–69 %. All new compounds <strong>4</strong> and <strong>5</strong> were fully characterized by ¹H, ¹³C, and ¹⁹F NMR, SC-XRD, HRMS, and UV–Vis spectroscopy. Additionally, TD-DFT calculations supported and rationalized the observed photophysical properties of series <strong>4</strong> and <strong>5</strong>. Lastly, BSA-binding experiments and molecular docking evaluations showed the best interaction with site III of albumin was observed when 5-aryl was 4-BrC₆H₄ (<strong>5d</strong>).</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117024"},"PeriodicalIF":4.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941320","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":"A fluorescent sensing system based on Fe-doped ZIF-8 for highly selective detection of glyphosate in cucumber and Sugarbeet","authors":"Xiaoqian Liu ,&nbsp;Pute Yang ,&nbsp;Shangyu Hou ,&nbsp;Rong Yang ,&nbsp;Qin Zhou ,&nbsp;Xiwei Wang","doi":"10.1016/j.jphotochem.2026.117023","DOIUrl":"10.1016/j.jphotochem.2026.117023","url":null,"abstract":"<div><div>The widespread application of glyphosate has led to severe threats to both ecosystems and human health. Conventional detection technologies, which typically depend on sophisticated instruments and involve complex operational procedures, are characterized by low response efficiency. Addressing this challenge necessitates the development of novel detection methods that are simple to operate, highly sensitive, and yield reliable results. In this work, an Fe-doped ZIF-8 composite material (Fe@ZIF-8) was synthesized using a room-temperature precipitation method. To investigate the feasibility of Fe@ZIF-8 for glyphosate sensing, its structural stability and detection mechanism were verified through characterization by FTIR, XRD, SEM and XPS. It was verified that a stable coordination compound is formed between the Fe³⁺ sites in the studied material and the phosphonic acid and carboxyl functional groups present in the glyphosate molecule by density function theory (DFT) calculations.Through methodological investigation, it can be concluded that a strong linear correlation between the fluorescence difference (ΔF) and the natural logarithm of glyphosate concentration in the range of 0.05–3 mg/L. The regression equation was determined to be ΔF = 50.22 + 134.84ln (x + 0.85), with a correlation coefficient (R²) of 0.99386. The detection limit was calculated to be 0.022 mg/L, confirming the high sensitivity of this approach. Given its excellent reproducibility, water stability, and simple preparation, Fe@ZIF-8 presents a new and viable strategy for the detection of glyphosate in practical applications.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117023"},"PeriodicalIF":4.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979859","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":"Integrated design of C2-Pyridyl-functionalized Polyaryl imidazole: Solvent/light/acid/mechanical force quadruple-responsive properties construction for intelligent anti-counterfeiting","authors":"Shenggui Wen ,&nbsp;Zaiwu Wang ,&nbsp;Jinghe Weng ,&nbsp;Xueming Li","doi":"10.1016/j.jphotochem.2026.117031","DOIUrl":"10.1016/j.jphotochem.2026.117031","url":null,"abstract":"<div><div>A one-pot method has been employed to design and synthesize a series of C2-Pyridyl-Functionalized Polyaryl Imidazole derivatives (<strong>DIY-BiR</strong>). The solvatochromic behaviors of <strong>DIY-BiR</strong>were demonstrated in solvents of varying polarity with distinct. <strong>DIY-BiR</strong> also exhibited acidochromism. Moreover, in systems with varying water content, the fluorescence emission spectra exhibited aggregation-caused quenching behavior and bathochromic (red) shifts. All six compounds delivered a photochromic response in chloroform as solvent demonstrating a specific recognition capability for chloroform. The <strong>DIY-BiH</strong>, <strong>DIY-BiMeO</strong>, and <strong>DIY-BiBr</strong> compounds exhibit reversible mechanochromic properties. UV absorption, fluorescence emission spectroscopy, single crystal X-ray diffraction, powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC) analyses and DFT calculation were used to conduct some rational analysis on the Solvent/Light/Acid/Mechanical force quadruple response demonstrated by <strong>DIY-BiR</strong>. The findings of this study could serve as the basis for applications such as ink-free information storage, acidic environment detection, and dynamic multi-level anti-counterfeiting, informing the multifunctional stimuli-responsive materials.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117031"},"PeriodicalIF":4.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979860","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":"Co3O4/ZnFe2O4 p-n junction-decorated diatomite as magnetic photocatalyst for enhanced degradation of doxycycline hydrochloride","authors":"Qiong Wu,&nbsp;Huidong Zhang,&nbsp;Qiang Song,&nbsp;Fang Huang,&nbsp;Zhilin Wang,&nbsp;Dehong Cheng","doi":"10.1016/j.jphotochem.2026.117037","DOIUrl":"10.1016/j.jphotochem.2026.117037","url":null,"abstract":"<div><div>In this paper, the p-n junction of Co₃O₄/ZnFe₂O₄ was immobilized onto the surface of porous mineral diatomite (CO/ZFO/Dt) via hydrothermal method, for the enhanced photodegradation of doxycycline hydrochloride (DOXH). CO/ZFO/Dt presents enhanced photodegradation efficiency, as well as excellent recyclability in six turns. Diatomite not only presented anti-agglomeration effect towards nanoparticles, but also enhanced DOXH adsorption due to its hierarchical porous structure. The water quality parameters including pH, initial DOXH concentration, inorganic anions (Cl⁻, NO₃⁻, CO₃²⁻) and humic acid were examined. The DOXH photodegradation mechanism was proposed, and reaction pathways were deduced. The quenching results proved that ·O₂⁻ was the primarily radical for DOXH photodegradation. In conclusion, the ternary composite CO/ZFO/Dt provides a promising solution for wastewater purification.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117037"},"PeriodicalIF":4.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979861","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":"A-site doping modulates Mn2+ energy level splitting for green luminescence in Cs3MnBr5 perovskites under blue excitation and stacking solar cell application","authors":"Ru-Ping Wang ,&nbsp;Xiao-Song Zhang ,&nbsp;Xiu-Rong Yuan ,&nbsp;Xiao-Kai Gong ,&nbsp;Hai-Bo Ma ,&nbsp;Bao-Zeng Zhou ,&nbsp;Li-Na Kong ,&nbsp;Jian-Ping Xu ,&nbsp;Lan Li","doi":"10.1016/j.jphotochem.2026.117048","DOIUrl":"10.1016/j.jphotochem.2026.117048","url":null,"abstract":"<div><div>Due to their high carrier mobility, tunable bandgaps, narrow emission linewidths and solution-processability, metal halide perovskites demonstrate exceptional promise in photovoltaics, optoelectronics and photodetection. But the toxicity of lead has hindered its practical applications significantly. A series of lead-free perovskites materials have received great attention from researchers, there remains substantial scope for advancing research into the narrowband tunability of such lead-free perovskite materials compared to CsPbBr₃. Bromo‑manganese cesium perovskites can achieve red and green luminescence, but there are still unsatisfactory luminescence efficiency, poor stability, limited green light tunability, and the mechanism by which alkali metal ion doping affects the regulation of energy level splitting by the manganese crystal field remains unclear. This study prepares Cs₃MnBr₅ via thermal injection. A-site doping (partially substituting Cs with Na, K ions) preserves its crystal structure. Doping with Na⁺ and K⁺ enhances the luminescence intensity of the material and enables effective spectral modulation, while also providing insights into the underlying mechanism. Specifically, modifications to the lattice structure tune the electronic properties, induce splitting of the Mn²⁺ energy levels, and increase the splitting energy of the 3d orbitals. The energy required for the electronic transition from the ⁴T₁(G) state to the (Wang et al., 2024⁶⁾A₁(S) energy level increases, leading to the occurrence of a blue shift and achieving the spectral tunability within the green light range. Silicon solar cells exhibit enhanced power conversion efficiency (PCE) when undoped Cs₃MnBr₅ and Na/K-doped Cs₃MnBr₅ are employed as the down-conversion layer. Thus, this material exhibits broad application prospects in lighting, display technology, optoelectronic devices, biomedical.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"475 ","pages":"Article 117048"},"PeriodicalIF":4.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979857","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}