JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2026
·
IF 5.9
Zhifei Zhou,Chao Huang,Zhiwei Xiang,Yuanzheng Yang,Yanxue Wu,Weitong Cai
CsPbBr 3 perovskite solar cells (PSCs) have attracted increasing attention due to their superior thermal and environmental stability; however, their power conversion efficiency (PCE) remains limited by uncontrolled crystallization and high defect density during solution processing. Meanwhile, the widespread use of toxic antisolvents and the limited effectiveness of single control strategies necessitate the development of greener and more effective fabrication methods. To address these issues, this study introduces a green mixed antisolvent by incorporating isopropanol (IPA) into ethyl acetate (EA), coupled with a three-step spin-coating process for the deposition of CsPbBr 3 films. By adjusting the volume fraction of IPA in the mixed antisolvent, the crystallization of CsPbBr 3 films was effectively regulated, resulting in dense, uniform films with low defect density. At an optimal IPA volume fraction of 10%, dense and hole-free CsPbBr 3 films were obtained with markedly suppressed non-radiative recombination. As a result, the corresponding CsPbBr 3 PSCs exhibited a significantly enhanced PCE of 8.15%, compared with 5.63% for devices processed using pure EA. Moreover, the optimized device retained 97.9% of its initial efficiency after 30 days of storage under ambient conditions without encapsulation. This work provides a practical solution for fabricating effective and environmentally friendly inorganic perovskite photovoltaic devices.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xue Jiang,Zhentao Du,Xiaoming Mo,Sheng Cao,Jinju Zheng,Bingsuo Zou,Jialong Zhao
Two-dimensional (2D) perovskites are highly promising optoelectronic semiconductor materials, yet their integration into microdevices is hindered by the difficulty in simultaneously achieving high crystallinity, regular shape, uniform size, and good processability during the synthesis process. Here, we report a substrate-free, room-temperature antisolvent recrystallization strategy using a mixture of toluene and green alcohols to address this challenge. The core of our approach is antisolvent additive engineering, where alcohols such as isopropanol guide anisotropic growth of crystals, thereby enabling the large-scale production of uniform microplates. The versatility of this method is fully demonstrated in the preparation of 2D (PEA)2Pb(Br,I)4 and (BA)2PbBr4 perovskite microplates. Under the optimized toluene/isopropanol volume ratio (21:4), (PEA)2PbBr4 single-crystal plates with a uniform rectangular shape and an average lateral size of 9.4 μm can be produced, which exceeds the size of most previously reported 2D perovskite micro/nanosheets. Furthermore, XRD analysis reveals that the synthesized (PEA)2PbBr4 microplates exhibits excellent stability even after exposure to air for 16 weeks. In particular, the as-constructed photodetectors based on (PEA)2PbBr4 microplates demonstrate excellent performance, with a dark current of 6.69 pA, a responsivity of 1.21 A/W, a switching ratio of 20.5, a detectivity of 1.75 × 1012 Jones, and an external quantum efficiency of 400%. This work provides a scalable approach for fabricating uniform 2D perovskite microplates of diverse compositions, thereby facilitating the exploration of high-performance, low-cost and integrated optoelectronic microdevices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Wanying Zhang,Kaihuai Zhuo,Jie Chen,Tongtong Wang,Xuanyang He,Mengjie Li,Weilin Gao,Yiran Zhao,Xue Yang,Zhuoyin Peng,Xiaoyu Zhang,Yingwei Wang,Keqiang Chen,Guogang Li
Surface ligands are crucial for perovskite quantum dot (PQD) optoelectronics. However, long alkyl chains limit charge transport, while short chains destabilize their soft lattice, presenting a stability–mobility dilemma. Moreover, surface-bound protonated primary amines are susceptible to deprotonation, accelerating performance decay and structural collapse. In this work, we introduced tetrabutylphosphonium bromide (TBPB) as a surface passivation ligand to overcome these limitations. TBPB combines minimal molecular polarity—enabling a short chain for superior charge transport—with a fully coordinated phosphonium center that resists deprotonation and passivates halogen vacancies. This yields quantum dots with near-unity PLQY and robust stability, leading to LEDs achieving a maximum external quantum efficiency (EQE) of 24.28% and luminance of 122,786 cd m −2 , far surpassing control devices. Further shortening the ligand chain increases EQE to 27.89% but at the cost of severe luminance loss, underscoring the delicate balance in ligand engineering.
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Advanced Optical Materials
·
2026
·
IF 7.2
Jialong Xu,Yubiao Yue,Zhishan Chen,Hongqiang Zhu,Shaoan Zhang,Yiqing Chen,Huiwang Lian,Yuzhen Wang,Jia Xu,Linhai Li,Yang Li
Rapid, instrument-free detection of mercury ions (Hg 2+ ) is critical for addressing environmental emergencies, yet current methods face limitations in poor portability and sensitivity. Herein, a deep learning-optimized paper-based kit that incorporates controllable turn-off fluorescence of metal halide perovskite for instrument-free time-critical Hg 2+ detection by the dynamic quenching mechanism and ensures visual discernment at 2 ppb, achieving a 1000-fold sensitivity improvement over commercial strips is presented. Furthermore, a smartphone app powered by the deep learning model (MobileViT) further optimizes sensitivity, achieving ultrasensitive quantification (0.11 ppb limit of detection) across a 0.2–200 ppb linear range (R 2 = 0.987) with 98% overall accuracy, and the whole detection is completed only within 5 min. This approach of instrument-free time-critical Hg 2+ detection anticipates a new paradigm for rapid and on-site Hg 2+ monitoring in environmental and industrial settings.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Yiyuan Peng,Zequn Ma,Ting Chen,Qifei Xia,Renjie Zhou,Zhixiang Xie,Chunxian Guo
CsPbX 3 (X = Cl, Br, I) all-inorganic perovskite nanocrystals (NCs) are a class of rapidly developing new optoelectronic materials. By virtue of their excellent luminescent properties, they have found wide application in optoelectronic devices including light-emitting diodes (LEDs), solar cells, and micro/mini-LEDs. Covalent Organic Framework (COF) coating effectively addresses the issue of insufficient stability, while it suffers from small pores and low coating efficiency. Thus, cetyltrimethylammonium bromide (CTAB) and 1, 3, 3, 5-tetramethylbenzene (TMB) were employed as swelling restrictors, and a hierarchical microporous channel structure was constructed in the COF material. CsPbBr 3 NCs was synthesized in situ through room temperature supersaturation recrystallization, forming CsPbBr 3 @TC-COF composite materials. Therefore, the COF material's pore size expanded to a layered structure ranging from 10 to 20 nm, preventing the aggregation and quenching of nanocrystals, thus enhancing the photoluminescence quantum yield (PLQY) and stability of CsPbBr 3 NCs. Specifically, the PLQY of CsPbBr 3 @TC-COF composites increased significantly from 37.71% for pristine CsPbBr 3 to 90.35%. Even after 30 days of storage at room temperature, CsPbBr 3 @TC-COF composites maintained 53.26% of their initial PL intensity, compared to 22.41% for the pristine CsPbBr 3 NCs. Additionally, they exhibited excellent stability in several polar solvents. Ultimately, through the integration of CsPbBr 3 @TC-COF composites, K 2 SiF 6 :Mn 4+ (KSF) red powder, and blue LEDs, a white LED (WLED) device was successfully fabricated. The device has an efficiency of 33.89 lm W −1 and a correlated color temperature (CCT) of 4036 K, indicating that this composite material is highly likely to be an ideal choice for next-generation lighting and display technologies.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.1
Penghao Zhu,Guang Zheng,Kaili Gao,Duoxia Xu,Xiaohua Nie,Yuanchao Lu,Guijie Hao,Xianghe Meng
Size and shape critically influence the optical properties of CsPbBr 3 NCs, but lack sufficient research in sensing. Herein, particle sizes and shapes of CsPbBr 3 NCs were precisely adjusted by room-temperature synthesis method, and sensing performances to peroxide value (PV) of edible oils were investigated. The results found that the particle sizes (4.3 ± 0.2, 6.3 ± 0.2, 8.8 ± 0.3, and 12.9 ± 0.6 nm) of high-crystallized cubic CsPbBr 3 NCs were precisely obtained, and the fluorescence (from 491 to 516 nm) and absorption (from 470 to 526 nm) peak wavelengths redshifted as the particle size increased from 4.3 nm to 12.9 nm. Among four particle sizes, CsPbBr 3 NCs (8.8 nm) demonstrated the optimal sensing performance (wavelength-shifted colorimetric method R 2 = 0.99) for PV detection, achieving a linear response range of 0.02–0.36 g/100 g with LOD of 0.0022 g/100 g and LOQ of 0.0073 g/100 g. Considering the interference from trace moisture in edible oil, a moisture-compensated intensity-quenched colorimetric method was proposed to improve the practical accuracy, with the practical recovery rates from 95%–245% to 90%–119%. Therefore, the proposed methods had good sensitivity, accuracy and practicability, and enlightened the effective technologies for the quality detection of edible oil.
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OPTICAL MATERIALS
·
2026
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IF 4.2
Zhiqun Xu,Bo Hou,Pingping Fan,Zhonghua Pan,Guobin Huang,Teng Gao
The widespread use of sulfadiazine (SDZ) in veterinary medicine and its subsequent accumulation in environmental waters necessitate the development of sensitive and selective monitoring tools. This study presents a novel hierarchical core-shell fluorescent nanocomposite, FAPbBr 3 PNCs@SiO 2 @MIP, for the ultrasensitive and selective detection of SDZ. The sensor was constructed by encapsulating water-sensitive formamidinium lead bromide perovskite nanocrystals (FAPbBr 3 PNCs) with a protective silica shell, followed by the grafting of a molecularly imprinted polymer (MIP) layer. The silica coating markedly improved the aqueous stability of the PNCs, while the MIP layer provided specific recognition cavities for SDZ, enabling detection through a photoinduced electron transfer-mediated fluorescence quenching mechanism. Under optimal conditions, the sensor demonstrated a wide linear response from 0.1 to 200 ng/mL and a remarkably low detection limit of 0.03 ng/mL. It also exhibited excellent selectivity against structurally analogous sulfonamides and common interfering ions (Imprinting factor is 3.9), along with high reproducibility and stability in complex media (94.3–100.9 % for the same batch, 98.9–101.4 % and 99.2–104.2 % for different batches). The practical applicability was validated through the successful detection of SDZ in real water and pork samples (Recovery was 99.2–112.0 %, RSD was 2.3–8.9 %), yielding results in good agreement with those from the standard liquid chromatography coupled with mass spectrometry (LC-MS) method. This work establishes a robust and reliable sensing platform for trace-level SDZ monitoring in environmental and food safety applications.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121312
·
IF 7.2
Qinming Wang,Jinlin Wan,Sen Wu,Xingfu Zhou
Perovskite films fabricated by the solution-based approach usually contain a high density of defects, and as the top surface is exposed to the external environment, this region is where major defects are most easily formed. Organic ammonium salts can be used as materials for interfacial defect passivation. This study employed propylamine hydroiodide (PAI) to passivate the ternary perovskite's surface. PAI's interfacial passivation can effectively improve the interface defect and obtain the better film quality. Meanwhile, the incorporation of PAI can efficiently diminish the film's surface roughness, which is beneficial for the excellent contact at the interface. Post-PAI treatment effectively reduces the non-radiative recombination, markedly improving device stability and PCE. The final results show that the highest efficiency (PCE) after PAI passivation is 15.72 %, the open circuit voltage (V OC ) is 0.98 V, the short circuit current (J SC ) is 20.96 mA/cm 2 , and the filling factor FF is 76.51 %, which is 16.1 % higher than that of un-passivated devices. And in the case of light storage for more than 2000 h without packaging, PCE loss is only 14.5 %, showing significant long-term stability.
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Nature Communications
·
2026
·
IF 15.7
Li Yukong,Wang Ziyi,He Xiaoyang,Sun Chen,Zheng Qikai,Jiang Yilin,Chen Zuofeng,Fei Honghan
Hybrid lead halides have demonstrated great promise for CO 2 photoreduction due to their excellent photophysical properties. However, developing a single-component hybrid lead halide that combines high intrinsic stability with near-infrared absorption remains a significant challenge. Herein, to address both issues, we design a series of nine highly stable lead halide frameworks functionalized by bis(terpyridine)-metal complexes, which exhibit strong light absorption extending into the near-infrared region up to 1150 nm. Unlike their symmetric chloride and bromide analogues, the charge-polarized lead iodide sites in bis(terpyridine)-metal-functionalized frameworks serve as highly efficient C–C coupling centers for C 2 production in near-infrared-driven CO 2 photoreduction, achieving notable C 2 production rates of up to 14.2 μ mol g -1 h -1 with electron selectivities as high as 86%. These performances match the state-of-the-art among all reported single-component, near-infrared-responsive photocatalysts. This work highlights the potential of coordination-driven assembly of highly stable lead halide frameworks for near-infrared-driven artificial photosynthesis.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Hao Yao,Xinhua Ouyang
Quasi-2D perovskite materials hold great promise for efficient blue LEDs due to their unique multi-quantum-well structure. However, achieving high efficiency in blue quasi-2D perovskite LEDs (PeLEDs) remains challenging, largely because of uncontrolled phase distribution and defect-related non-radiative recombination. In this work, two isomeric forms of diammonium organic cations were designed and synthesized, 1,4-phenylenedimethan-aminium bibromide (m-PDMABr₂) and 1,3-phenylene-dimethanaminium bibromide (p-PDMABr₂), which introduces them as blended spacer cations together with phenethylammonium bromide (PEABr). These isomers not only suppress the formation of undesired small-n phases but also passivate defects in the perovskite film. By optimizing the blending ratio of m-PDMABr₂ to PEABr (3:7), we achieve improved phase distribution and lower defect density. As a result, the champion PeLED delivers a peak external quantum efficiency (EQE) of 13.68%. While devices using p-PDMABr₂ at the same ratio reach a maximum EQE of 12.26%. Compared to the control device based solely on PEABr (EQE = 7.11%), these represent remarkable improvements of 92.41% and 72.43%, respectively. Our study demonstrates that strategically designed isomeric spacer cations can effectively tune phase behavior and suppress defects, offering a practical materials-design strategy for high-performance blue quasi-2D PeLEDs.
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Journal of Physical Chemistry Letters
·
2026
·
IF 4.6
Meiqi Wang,Chen Yin,Yuxuan Du,Huan Liu,Bin Sun
Large-sized lead sulfide (PbS) colloidal quantum dots (CQDs) face significant stability challenges in near-infrared applications due to increased surface active sites. While traditional halogen ligands achieve preliminary passivation, they are prone to dissociation under high-temperature operating conditions, leading to rapid device performance degradation. This study proposes an aromatic bidentate ligand passivation strategy based on 2-picolinic acid (2-PCA). The device demonstrates an external quantum efficiency (EQE) of 35% at 1650 nm wavelength, with responsivity and normalized detectivity reaching 0.46 A/W and 3.58 × 1011 jones, respectively representing a 2.33-fold improvement over conventional halogen-passivated devices. Under thermal stress at 180 °C for 2 h, devices with 2-PCA ligands retain approximately 90% of their initial normalized EQE, marking a 15-fold improvement in stability compared to devices using halogen ligands (PbX2, X = Br–, I–), which undergo nearly complete failure. This aromatic bidentate ligand passivation strategy provides a new pathway for developing high-performance infrared photodetectors with enhanced thermal stability.
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ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Dan Xu,Jiazhuo Nie,Zhelu Hu,Zhuoying Chen
Wide-bandgap (1.68 eV) perovskite solar cells (PSCs) are considered promising candidates for indoor photovoltaics due to their favorable optical properties. However, their power conversion efficiency (PCE) is significantly constrained by large open-circuit voltage (VOC) losses, which primarily originate from intrinsic halide vacancy defects and uncoordinated Pb2+ located at the surface and grain boundaries of the perovskite films. Additionally, the energy level mismatches at the perovskite/electron transport layer (ETL) interface further aggravate VOC losses by promoting nonradiative recombination. Herein, we report a synergistic dual-halide interface passivation strategy based on methylammonium iodide (MAI) and methylammonium chloride (MACl), in which the two halides play complementary and mechanistically distinct roles. MAI effectively reacts with and converts residual surface PbI2 into the perovskite phase, while simultaneously passivating iodine-related vacancy defects. In parallel, MACl induces beneficial chloride incorporation at the interface, enabling slight bandgap broadening and producing a favorable vacuum-level shift that optimizes energy-level alignment between the perovskite and electron transport layer. When applied together, MAI and MACl deliver a cooperative passivation effect, substantially suppressing nonradiative recombination, prolonging carrier lifetimes, and facilitating more efficient charge extraction. As a result, the optimized 1.68 eV PSCs achieve a notable PCE of 20.41% with a VOC of 1.262 V under standard AM 1.5G illumination, surpassing the untreated counterparts that achieve 18.48% with a VOC of 1.169 V. More importantly, under indoor lighting conditions, the modified PSCs exhibit outstanding performance, delivering PCEs of 36.74 and 32.36% under 1000 and 200 lx LED illumination, respectively, demonstrating their strong potential for indoor photovoltaics.
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