Journal of Materials Chemistry C
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2025
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IF 5.1
Yu Liu,Li Chen,Shaohong Li,Zejiang Gao,Yuping Pang,Bingsuo Zou
Metal halide perovskites have emerged as promising candidates for self-powered photodetectors due to their exceptional optoelectronic properties, including low exciton binding energies, high absorption coefficients, superior charge transport properties, and solution processability. However, the inherent high dark current in perovskite-based devices remains a fundamental limitation to their performance. In this study, we present an interface engineering strategy to overcome this challenge by incorporating a self-assembled monolayer (SAM) between the TiOx electron transport layer and the CsPbBr3 perovskite quantum dot film. Comprehensive experimental analysis indicates that the SAM layer performs a critical dual function: it effectively blocks interfacial electron injection as a charge barrier and promotes higher quality perovskite films through crystallinity optimization and defect passivation, ultimately suppressing non-radiative recombination. This synergistic effect results in a reduction of dark current to an ultralow value of 2.13 × 10−10 A. The optimized photodetector exhibits high-performance metrics at zero bias under 365 nm illumination, achieving an outstanding on/off ratio of 7.6 × 106, a high specific detectivity of 2.74 × 1012 Jones, and an extensive linear dynamic range of 137.7 dB. Furthermore, the device demonstrates exceptional environmental stability, maintaining 91.8% of its initial efficiency after 120 days of storage in a nitrogen atmosphere without encapsulation. This work establishes a universal approach for defect suppression in perovskite optoelectronics, with potential applications extending to solar cells, light-emitting diodes, and radiation detectors.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Ning Zhang,Yingmei Meng,Zhiying Li,Chuanlong Jin,Junjiang Bao,Xiaopeng Zhang,Gaohong He
High free-volume microporous membranes constructed by intrinsically microporous polymers (PIMs) are up-and-coming in efficient carbon capture, but their practical applications are limited by plasticization and physical aging issues. This work we proposed a CO 2 -solution-compensated cross-linking strategy to construct microporous membranes with both crosslinking network and enhanced CO 2 solubility via the Hoffmann alkylation reaction between the bromomethylated PIM matrix and Ethylenediamine (EDA) only at 80 °C. The enhanced CO 2 solubility could compensate the reduced CO 2 diffusion by the crosslinking network. Accordingly, the crosslinked microporous membranes with CO 2 -solubility compensation achieved a superior decarbonization from natrual gas (CO 2 permeability of 898.9 Barrer, CO 2 /CH 4 separation factors of 204.1) surpassing the 2019 Robeson upper and excellent anti-plasticization (plasticizing pressure up to 0.8 MPa) and anti-aging (CO 2 permeability loss < 10 % after 30 days) performance. The CO 2 -solubility-compensation crosslinking strategy will promote the development of high-performance microporous membrane for efficient decarbonization.
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ACS Applied Nano Materials
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2025
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IF 5.5
Yueli Liu,Tonghuan Gao,Zifan Yang,Huixin Zhu,Keqiang Chen,Yunan Bao,Wen Chen
Inorganic CsPbI3 perovskite quantum dots (PQDs) possess excellent optical properties, holding broad application prospects in the field of photovoltaics. However, the issues of a complex surface chemical environment and high compositional defect density for CsPbI3 PQDs have severely influenced the performance of CsPbI3 PQD solar cells (PQDSCs). Herein, the sequential treatment strategy based on the ligand exchange of trimethyliodosilane (TMIS) and the compositional defect regulation of formamidinium iodide (FAI) is introduced. Short-chain ligands of TMIS are used to replace the original ligands of CsPbI3 PQDs and robustly anchor to the PQD surface, which guarantees the high stability and efficient charge carrier transport of CsPbI3 PQDs. Furthermore, FAI is introduced by the vacancies and dangling bonds as the driving force on the PQD surface to passivate the defects of Cs and I vacancies while reducing the exciton binding energy and band gap of the CsPbI3 PQDs. Consequently, the power conversion efficiency of PQDSCs is achieved to be 15.07%, which is greatly enhanced compared with that of the control device (12.09%), and only 26% of the initial efficiency is lost after aging under ambient conditions (20–30% RH) for 14 days.
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高影响因子
Materials Today Physics
·
2025
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IF 9.7
Yongjian Chen,Yuanxiao Qu,Longchao Huang,Xiankan Zeng,Huayang Zhang,Wen Li,Guanqi Tang,Xiangtian Xiao,Weiqing Yang
Subnanometer-scale lithium fluoride (LiF) layer has been widely employed to enhance electron injection between Al electrode and organic electron transport layers (ETL). However, thermally evaporated ultrathin LiF exhibits incomplete substrate coverage and generates substantial defect-induced charge trapping centers during operation, resulting in poor organic/inorganic interfacial characteristics. In this work, a composite electron injection layer (cEIL) was constructed by combining 8-Quinolinolato lithium (Liq) with excellent interface characteristics of organic/inorganic transition and LiF with strong polarity, which significantly improved the surface potential distribution and achieved balanced charge distribution. The optimized perovskite light-emitting diodes (PeLEDs) demonstrated remarkable electroluminescence (EL) performance enhancement: the external quantum efficiency (EQE) increased from 15.74 % to 20.53 %, and the current efficiency (CE) improved from 73.39 cd/A to 98.59 cd/A. This study provides new insights for organic/inorganic interface engineering in high-performance optoelectronic devices.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Ge Gao,Li Chen,Xingyu Pan,Dingyiran Wu,Dingkang Xiong,Liuting Chen,Bingsuo Zou
All-inorganic lead halide perovskite quantum dots (QDs) have emerged as promising materials for photodetection owing to their exceptional optoelectronic properties. However, solution-processed CsPbBr3 QD films suffer from severe carrier recombination losses and inefficient charge transport. Herein, we address these challenges through rational design of Type-II CsPbBr3/SnS2 nanohybrid heterostructures, where SnS2 nanoparticles serve as electron transport pathways. Systematic characterization reveals that the interfacial energy band alignment enables fast charge separation while suppressing radiative recombination compared to pristine CsPbBr3 QDs. Based on these advantages of the CsPbBr3/SnS2 heterostructure, we demonstrate a self-powered UV photodetector exhibiting high sensitivity with a detectable threshold as low as 0.06 mW cm−2 at zero bias. The optimized device exhibits a high responsivity of 142.5 mA W−1, a remarkable specific detectivity of 1.13 × 1013 Jones, an ultrafast response time of 4 ms and a linear dynamic range of 84.4 dB. The device also exhibits an ultralow dark current in the order of 10−11 A, enabling a light-to-dark current ratio of up to 16 522. These parameters surpass those of most previously reported perovskite QD-based photodetectors. This work provides a viable strategy for engineering perovskite heterostructures toward high-performance optoelectronics, particularly for UV monitoring and industrial process control systems requiring zero-power operation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Tianshu Yang,Xiaofeng Wu,Liming Fu,Jin Xu
Self-assembled monolayers (SAMs) serve as essential interfacial modification materials and have been extensively employed in high-performance perovskite solar cells (PSCs) to enhance charge transport efficiency, reduce interfacial defect density, and improve overall device performance. Despite their advantages, SAMs still encounter notable challenges in further enhancing the efficiency and long-term stability of PSCs. This study systematically investigates [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic acid (MeO-2PACz), [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz), and their mixed SAMs. The findings reveal that a strategic combination of these two SAMs can substantially enhance device performance while maintaining robust stability. Within the mixed SAMs, MeO-2PACz contributes to improved charge transport efficiency and enhances the crystalline quality of the thin film, whereas the hydrophobic nature of Me-4PACz significantly bolsters the environmental stability of the device. PSCs fabricated with the mixed SAMs demonstrate commendable efficiency and exceptional stability, with the optimal device achieving a photoelectric conversion efficiency (PCE) of 21.92 %. The device retains 90 % of its initial efficiency after 600 h of aging in a glovebox environment and maintains 85 % of its initial efficiency after 288 h of aging in a high-humidity atmospheric environment. This study demonstrates that mixed SAMs hold significant potential for achieving high-performance and high-stability PSCs.
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SOLAR ENERGY
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2025
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IF 6.6
Zhenwu Zhong,Ke Zhao,Qixu Hu,Jian Cheng,Ying Wang,Wenjun Zhang,Yan Zhang,Hongyu Mi,Changyan Guo,Xiaokaiti Abulizi,Min Jae Ko,Yahong Xie
Graphene nanomaterials exhibit significant potential for carbon-based perovskite solar cells (C-PSCs); however, functionalized graphene derivatives remain relatively underexplored for interfacial engineering, particularly for cost-effective coal-derived materials. This study introduces a pioneering chemical modification approach using homemade coal-derived graphene oxide (GO) to synthesize two distinct functionalized graphene derivatives: hydroxylated graphene oxide (GO-OH) and carboxyl-functionalized graphene oxide (GO-COOH). Experimental results indicated that the excessive acidity of GO-COOH induces the degradation of perovskite film. Therefore, we constructed two device architectures: pritine (FTO/SnO 2 /MAPbI 3 /CE) and GO-OH-modified C-PSCs (FTO/SnO 2 /MAPbI 3 /GO-OH/CE) to investigate the impace of GO-OH incorporation on Photoelectric performance. The optimized device achieves a substantial 20.4 % boost in power conversion efficiency (PCE), increasing from 13.42 % to 16.16 %. Mechanistic investigations reveal that GO-OH serves a dual function: passivating deep-level defects (Pb 2+ and Pb 0 ) to optimize energy level alignment while simultaneously promoting perovskite grain growth, which enhances charge transport and boosts fill factor ( FF ) and short-circuit current density ( J sc ). Furthermore, the incorporation of the GO-OH interlayer facilitates efficient carrier extraction and maintains 90 % of its initial PCE after 30 days of ambient exposure, demonstrating remarkable stability. This work pioneers the application of functionalized coal-derived graphene oxide in C-PSCs, offering a novel and scalable strategy for enhancing both efficiency and stability.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shareen Shafique,Haodong Wang,Yegang Lu,Taimoor Iqbal,Yuheng Wang,Baihui Shen,Ran Zhao,Li Sheng,Cheng Yang,Muhammad Salman,Fei Zheng,Ziyang Hu
Metal halide perovskite photodetectors (PDs) are attractive for next-generation optical communication and biomedical sensing owing to their high absorption coefficients, bandgap tunability, and solution-processability. However, their practical deployment is hindered by interfacial defects and ion migration, which result in high dark currents, noise, and limited operational stability. Here, we report a dual-interface (DI) engineering strategy that incorporates Ti 3 C 2 T x MXene simultaneously at the buried and top interfaces of the perovskite layer. This approach effectively passivates undercoordinated Pb 2+ /I − sites, suppresses trap-assisted recombination, and mitigates ion migration, thereby enabling ultralow-noise and fast-response devices. The optimized DI PD exhibits a suppressed dark current, a detectivity of 1.94 × 10 12 Jones, a responsivity of 0.44 A W −1 , and rise/fall times of 1.65/1.00 μs at 656 nm. The device retains >97 % of its performance after 60 days of nitrogen storage. Application demonstrations confirm error-free visible-light communication up to 10 kHz and precise photoplethysmography monitoring under varying illumination. This work highlights MXene-based DI engineering as a universal and scalable strategy for advancing high-performance perovskite PDs in data communication and healthcare technologies.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Ying Wang,Wenjun Zhang,Zhenwu Zhong,Min Liu,Yan Zhang,Zhaoxiang Qi,Ying Qi,Hongyu Mi,Jian Cheng,Shu Yin,Yahong Xie
The strategic design of hole transport layers (HTLs) with dual functionality in interfacial charge regulation and recombination suppression represents a critical pathway for advancing carbon-based perovskite solar cells (Carbon-PSCs). This study presents a facile synthesis of coal-derived carbon nanotubes (C-CNTs) characterized by self-passivated surfaces enriched with oxygen-containing moieties (-COOH, -OH). This unique structural architecture imparts dual functional superiority through intrinsic aqueous dispersibility that eliminates the need for post-synthesis processing, as well as self-regulated charge redistribution driven by the electron-withdrawing nature of the -I effect. These features work in synergy to establish anisotropic hole transport networks that enforce electronic confinement. When integrated as HTLs in Carbon-PSCs, the oxygen-functionalized C-CNTs significantly reduce interfacial recombination losses, achieving a champion power conversion efficiency (PCE) of 14.25% with only 10 wt% C-CNTs. The modified device structure, FTO/SnO 2 /CH 3 NH 3 PbI 3 /C-CNTs/Carbon, demonstrates performance surpasses that of the pristine device (structure: FTO/SnO 2 /CH 3 NH 3 PbI 3 /Carbon, PCE: 11.99%) by 18.85%, and approaches the performance of the device with commercial high-purity CNTs (>95 wt%, structure: FTO/SnO 2 /CH 3 NH 3 PbI 3 /Commercial-CNTs/Carbon, PCE: 14.44%). By repurposing coal as a sustainable precursor for optoelectronic materials, this work pioneers a defect-mediated interfacial engineering paradigm for solution-processed photovoltaic systems.
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Small Methods
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2025
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IF 9.1
Yueyan Wang,Yuhan Ma,Yongqi Zhang,Ruilin Liu,Luzhen Li,Naiwen Zhang,Peijie Wang,Lisheng Zhang
Methylammonium lead iodide (MAPbI 3 ) has been considered as the most influential component to boost the rapid development of perovskite photovoltaic devices during the past decade. However, the volatility of organic compounds (Methylammonium ions) causes excessive residual PbI 2 during the fabrication and storage process of MAPbI 3 films. The doping of various reduced graphene oxide (L-AA-rGO) is systematically induced into MAPbI 3 precursor ink to regulate the crystallization process, resulting in obtaining a high-quality perovskite film. The higher content of oxygen-containing functional groups (carboxyl and hydroxyl) and flexible sp 3 skeleton structure is successfully obtained in L-AA-rGO(LT), which is favored to form stable coordination bonds with uncoordinated Pb 2+ ions via lone pairs of electrons. Therefore, this functional L-AA-rGO(LT) not only passivates deep-level defects Pb 0 with its functional groups, but also absorbs the perovskite lattice structure with its special sp 3 carbon network to release its residual stress within the perovskite film. This work provides a new method to develop the efficiency and stability of MAPbI 3 perovskite solar cells via doping functional L-AA-rGO.
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PubMed
高影响因子
Journal of Physical Chemistry C
·
2025
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IF 3.2
Shujie Tie,Xiaojuan Lu,Guohong Tang,Wanjia Tian,Pu’an Lin,Jianguo Zhu,Wei Huang,Xiaojia Zheng
Halide perovskites have garnered significant attention in the field of X-ray detection due to their tunable band gap, strong X-ray absorption capability, and superior optoelectronic properties. However, the high levels of dark current and noise are detrimental to low-dose and high-sensitivity X-ray detection and raise concerns about the stability of the detectors. Low-dimensional halide perovskites with a wide band gap have been proven to be a promising material to address these challenges. Here, a series of high-quality Cs3Bi2IxBr9–x single crystals with varying halide ion ratios were grown, and the relationship between phase transitions and changes in the anion composition were revealed. The wide band gap and high resistivity of these single crystals effectively reduce the dark current and noise levels of the detector, laying a solid foundation for detectors with nearly zero noise levels. As a result, X-ray detectors with a sensitivity of 1516 μC Gyair–1 cm–2 and a low detection limit (LoD) of 6.2 nGyair s–1 were obtained, which also exhibit exceptional stability under heat, voltage, and radiation stimuli.
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