TALANTA
·
2017
·
IF 4.162
Pingxiu Tang,Zilin Chen
Hypercrosslinked polymers (HCPs) are currently receiving great attention due to their unique characteristics and potential uses in diverse areas. However, the field of HCPs for open-tubular capillary electrochromatography (OT-CEC) separations has not been explored. Here, a knitted aromatic polymer (KAP) was in-situ grown on the inner wall of the capillary column for OT-CEC for the first time. The silylating reagent containing phenyl was served as monomer , immobilized on the inner wall of the capillary column, and then KAPs-modified capillary column was prepared through in-situ hypercrosslinking reaction. The surface structure and morphology of KAPs-modified capillary column was characterized by Fourier transform infrared spectra (FT-IR) and scanning electron microscopy (SEM). The prepared capillary columns showed good separation performance for neutral compounds, small biomolecules, such as nucleosides , amino acids , small peptides, and non-steroidal anti-inflammatory drugs, sulfa drugs. In addition, the KAPs-modified capillaries showed good reproducibility, with relative standard deviations for intra-day, inter-day and column-to-column runs less than 1.59%, 2.55%, and 5.19% respectively. The strategy of in-situ immobilization of KAPs provides a new approach for the application of the material in the analytical fields.
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高影响因子
Advanced Science
·
2017
·Vol. 4
·期 10
·1700008
·
IF 9.034
Xin Yao,Junhui Liang,Yuelong Li,Jingshan Luo,Biao Shi,Changchun Wei,Dekun Zhang,Baozhang Li,Yi Ding,Ying Zhao,Xiaodan Zhang
Intensive studies on low-temperature deposited electron transport materials have been performed to improve the efficiency of n-i-p type planar perovskite solar cells to extend their application on plastic and multijunction device architectures. Here, a TiO 2 film with enhanced conductivity and tailored band edge is prepared by magnetron sputtering at room temperature by hydrogen doping (HTO), which accelerates the electron extraction from perovskite photoabsorber and reduces charge transfer resistance, resulting in an improved short circuit current density and fill factor. The HTO film with upward shifted Fermi level guarantees a smaller loss on V OC and facilitates the growth of high-quality absorber with much larger grains and more uniform size, leading to devices with negligible hysteresis. In comparison with the pristine TiO 2 prepared without hydrogen doping, the HTO-based device exhibits a substantial performance enhancement leading to an efficiency of 19.30% and more stabilized photovoltaic performance maintaining 93% of its initial value after 300 min continuous illumination in the glove box. These properties permit the room-temperature magnetron sputtered HTO film as a promising electron transport material for flexible and tandem perovskite solar cell in the future.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 16
·9662-9668
·
IF 3.108
Yueyue Shen,Shilin Zhao,Yue Li,Qian Liu,Chongdi Ma,Hui Mao,Yang Liao,Jun Ma
Humic acid (HA), one of most ubiquitous natural resources in the world, was modified with monoolein to prepare a novel hydrophobic adsorbent (HA–M) for removal of chlorobenzene compounds (CBs) from aqueous solutions. The influence of pH, temperature, coexisting organics and initial concentration on the adsorption capacity of HA–M for CBs were investigated to obtain the optimum removal efficiency. Furthermore, the adsorption kinetics and isotherms were researched as well as the column adsorption studies to reveal the mechanism for HA–M to adsorb CBs. The experimental results indicated that the HA–M materials exhibit high removal efficiency of CBs (>90%) in a wide range of pH values and temperatures. The adsorption of CBs with HA–M was realized by the hydrophobic interactions between CBs and HA–M. In addition, the HA–M also performed high removal efficiency toward organochlorine pesticides (OCPs) in aqueous solutions. Most important, the excellent adsorbability of the super-hydrophobic HA–M adsorbent could be comparable or fairly good compared with other adsorbents. Consequently, our present investigations provided a facile synthesis route for the highly effective and recyclable hydrophobic adsorbent for the adsorptive removal of CBs and OCPs from aqueous solutions.
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MOLECULES
·
2024
·Vol. 29
·期 17
·4009
·
IF 4.2
Yongjun Wei,Feiping Lu,Xinqi Ai,Ju Lei,Yong Bai,Zhiang Wei,Ziyin Chen
Perovskite solar cells (PSCs) are considered the most promising photovoltaic devices to replace silicon-based solar cells because of their low preparation cost and high photoelectric conversion efficiency (PCE). Reducing defects in perovskite films is an effective means to improve the efficiency of PSCs. In this paper, a lead chelator was selected and mixed into hole transport layers (HTLs) to design and prepare mesoporous PSCs with the structure of ITO/PTAA(BCP)/Al2O3/PVK/PCBM/BCP/Ag, and its modification effect on the buried interface at the bottom of the perovskite layer in the mesoporous structure was explored. The experimental results show that in the presence of mesoporous alumina, the lead chelator can still play a role in modifying the bottom of the perovskite film. The use of lead chelator as passivation material added to the HTL can effectively reduce the residue of dimethyl sulfoxide (DMSO) and decrease the defects at the bottom of the perovskite film, which dramatically improves the device performance. The PCE of the device is increased from 18.03% to 20.78%, which is an increase of 15%. The work in this paper provides an effective method to enhance the performance of PSCs.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Yuan Jin,Dan Zhao,Jiaqi Wang,Yifan Li,Meisheng Li,Xiuyang Zou,Shouyong Zhou,Yijiang Zhao,Qi Zhang,Dawei Yang
Poor alkali resistance and low ionic conductivity are the crux of the matter that hinder the commercialization applications of anion exchange membranes (AEMs). Here, we designed and synthesized a range of poly(phenylene oxide) (PPO)-based AEMs with benzyl free side-chain type. After that, the influences of different cationic functional groups, such as quaternary ammonium, imidazole and piperidine, on the membrane performances were examined systemically. The introduction of ether bond-containing side chains to build micro-phase separation structures enhanced the conductivity of AEMs (64 mS·cm −1 at 80 °C). At the same time, the side-chain without benzyl structures effectively avoids the influence of electron withdrawing groups on PPO main chains. Moreover, the steric hindrance effect of the benzene ring can further alleviate the attack of OH − , thereby improving the alkali resistance of the membrane. Molecular dynamics simulations revealed that a well-developed hydrogen bonding network was formed between ether linkages and water molecules in the side-chain structures, which enhanced the electrical conductivity of the membrane. Meanwhile, the prepared membranes owned a good water uptake and a certain dimensional stability. These results provide a basis for the subsequent enhancement of membrane performances.
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Materials Today Communications
·
2024
·
IF 3.7
Fengxuan Chen,Xin Hu,Longhao Jisi,Liping Su,Huiyao Zhao,Yanbei Wei,Rui Zhou,Yangdi Chen,Jun Qu,Yonglian Xiong,Mao Liang,Wenfeng Zhang
Metal halide perovskite solar cells have received a lot of attention from researchers because of their excellent performance, and their efficiency has increased rapidly over the past decade and is now comparable to that of conventional crystalline silicon solar cells. Perovskite solar cells (PSCs) are currently most commonly constructed with SnO 2 as an electron transport layer (ETL). Nevertheless, its existence of bulk phase defects and surface defects pose an impediment to developing a higher level as the most favorable electron transport layer. This paper suggests an efficient technique to decrease the defects of SnO 2 through incorporating a metal halide SnF 2 in planar (n-i-p type) perovskite solar cells. Divalent Sn in SnF 2 is easily oxidized to tetravalent Sn, leading to more conversion of divalent Sn to tetravalent Sn, which inhibits the formation of oxygen vacancies from the source. F replaces defective sites, passivates oxygen vacancy defects, and reduces the content of hydroxyl oxygen on the surface. Doping SnF 2 enhances the conduction band value and conductivity of SnO 2 , making the energy levels of the ETL and perovskite interfaces more compatible. This eliminates energy barriers in charge transport. Consequently, the fill factor of planar PSCs that were prepared through SnO 2 :SnF 2 ETL exhibited an increase from 80.01% to 82.12%. Furthermore, the efficiency of PCE underwent an improvement from 21.43% to 22.65%.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiuzhen Zhang,Xiyu Wang,You Yin,Yuanyuan Zhang,Lili Liu,Qile Li,Liangsheng Duan,Xinxin Ban,Linxing Shi
The fabrication of high-quality perovskite films with low defect density in ambient air is an important approach to enhance the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs). In this paper, efficient and stable PSCs were fabricated in ambient air, and p-xylilenediamine bromide (PhDMADBr) assisted additive or interface engineering were carried out to modify perovskite films, which was dispersed into the electron transport layer (ETL) or deposited in the ETL/ perovskite interface. Notably, interaction between PhDMADBr and perovskite layer could reduce defect density and release residual stress of the active layer, which would induce a high-quality perovskite film, and accelerate the transport rate and prolong lifetimes of charge carriers, contributing to the PCE and stability of devices. As a result, compared with the PCE of the control device (22.54 %), the PhDMADBr modified target PSCs exhibited the enhanced PCE of 24.15 % and 23.74 % after additive or interface treatments in ambient air, respectively. Except the improvement of the PCE, PhDMADBr-based devices also presented the enhanced moisture stability. The average efficiency retained the 88 % or 84 % of initial efficiency after 120 h with RH of 40 ± 5 % for additive or interface modification, respectively. In contrast, the PCE of the control devices would decline to 51 % of initial efficiency after storage for 120 h.
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Small
·
2025
·
IF 12.1
Hui Liu,Yuyang Li,Li Ding,Lixiang Wang,Weien Lai,Deren Yang,Yanjun Fang
Perovskites nanocrystals (PNCs) have garnered significant research interest in X-ray detection due to their strong X-ray absorption capability, and unique advantages in large area and thick film deposition that result from the decoupling of perovskite crystallization from film formation. However, traditional long-chain ligands used in PNCs, such as oleic acid and oleyl amine, suffer from poor conductivity and susceptibility to detachment, which limits the performance of X-ray detectors based on them. In this study, a strategy is proposed to partially replace long-chain ligands with short-chain counterparts like phenethylammoniumbromide (PEABr) and CF 3 PEABr, during the synthesis of CsPbBr 3 PNCs. This approach leads to a lower defect density, enhanced carrier transport, and suppressed ion migration simultaneously in the resulting PNCs. These PNCs are then combined with organic bulk heterojunction to construct the nanocomposite X-ray detectors, which exhibit an impressive sensitivity of 10787 µC Gy air ⁻¹ cm⁻ 2 and stable dark current baseline under a large electric field of ≈17 000 V cm −1 . Finally, a flat panel X-ray imaging sensor is prepared by monolithically integrating the nanocomposite film with a thin-film transistor backplane, enabling high-resolution and real-time X-ray imaging. The image quality is further enhanced through a super-resolution reconstruction approach, effectively facilitating a wide range of practical applications in real-world scenarios.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ang Gao,Yong Li,Yinjing He,Can Zheng,Lidan Liu,Zhike Liu,Dapeng Wang,Shengzhong Frank Liu
The quality of organic–inorganic hybrid perovskite films directly affects the application prospect of perovskite solar cells (PSCs), where organic and inorganic cations are the core elements that affect the quality of the perovskite. The additive strategy has been widely used to passivate cation-related defects in perovskite films. Here, the perovskite precursor solution introduced 5-bromopyridine-3-sulfonic acid (BOH) with a potential all-cation passivation function. The experimental results verified that the N atom on pyridine in the BOH molecular structure passivated the defects in perovskite by binding with undercoordination Pb2+, and the sulfonic acid group inhibited nonradiative recombination through their interactions with FA+ and Pb2+, improving perovskite grain size and crystallinity, and enhancing film quality. Thanks to the all-cationic targeted anchoring effect of BOH, the efficiency of the BOH-treated device upgraded from 22.32 to 24.33%. Importantly, PSCs with BOH showed excellent stability after exposure to 25% humidity for 1200 h at room temperature.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zuxiong Xu,Jianwei Wang,Zhongyu Liu,Cong Xiao,Jiahao Wang,Ning Liu,Jing Zhang,Like Huang,Ziyang Hu,Yuejin Zhu,Xiaohui Liu
Inorganic NiOx has attracted tremendous attention in organic–inorganic hybrid perovskite solar cells (PSCs) in recent years but is relatively less used in all-inorganic PSCs. In this study, we have discovered and confirmed the detrimental interfacial reaction between NiOx and DMAI-containing CsPbI3 inorganic perovskites. Thus, a self-assembled monolayer, Br-2PACz, is employed to modify the NiOx surface to obstruct the adverse interfacial reaction and further improve the device performance. The results demonstrate that Br-2PACz modification on NiOx can also improve interface contact, perovskite film morphology, and energy level alignments. Consequently, a champion power conversion efficiency (PCE) of 19.34% with a high open-circuit voltage (VOC) of 1.15 V is obtained for inverted NiOx/Br-2PACz-based CsPbI3 PSCs compared to the reference NiOx-based PSC with a moderate PCE of 15.16% (VOC 1.05 V). Moreover, the stabilities of both CsPbI3 films and devices exhibited significant enhancement after Br-2PACz modification. The unpacked PSCs could maintain 80, 73, and 89% of the initial efficiency after aging in 30–35% RH for 960 h, heating at 60 °C for 48 h, and continuous illumination for 284 h, respectively, highly superior to the reference devices. Our work offers a facile and effective approach for developing high-performance inverted NiOx-based CsPbI3 PSCs.
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Energy Technology
·
2024
·
IF 3.6
Jingyang Lin,Yanling He,Hongbo Mo,Abdul Khaleed,Zhilin Ren,Yin Li,Yingnan Cao,Jinyao Tang,Wei-Ting Wang,Shien-Ping Feng,Zhao Sun,Wen-Di Li,Tao Zhu,Gang Li,Alan Man Ching Ng,Aleksandra B. Djurišić
Flexible perovskite solar cells (fPSCs) prepared on flexible plastic substrates exhibit poor stability under illumination in ambient, due to inferior gas barrier properties of plastic substrates. Herein, we investigated effect of different modifications of the back surface of the substrate to improve stability under illumination in ambient. T 80 under simulated solar illumination at maximum power point in ambient (ISOS-L-1) can be increased from 80 h to over 350 h with the deposition of a single layer (by spin-coating or by atomic layer deposition (ALD)). While ALD layers resulted in the best T 80 value and significant reduction of the oxygen transmission rate compared to other modifications even for very low film thickness (≈10 nm), a simple solution-processed spin-on-glass barrier layer also enables significant (more than 4 times) improvement in device stability. This work illustrates the importance of barrier layers for decreasing the ingress of oxygen and moisture into fPSCs through the plastic substrate.
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npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-13
·
IF 12.3
Lu Ya,Chen Yuanyuan,Sun Haoyu,Deng Fang,Mei Changtong,Xu Xinwu,Wu Qinglin,Xiao Huining,Yue Yiying,Han Jingquan
Electroluminescent (EL) devices are of great significance for expanding the application range of optoelectronics. However, the realization of EL devices with environment-tolerance, stretchability, mechanical cycling stability, self-adhesion, biocompatibility, and high dielectric constant still remains a challenge. Herein, a type of EL device with enhanced comprehensive performances composing of a chlorinated barium titanate/phosphor/polydimethylsiloxane (Cl-BT/phosphor/PDMS) luminescent layer sandwiched between two silver nanowire-cellulose nanocrystal with II crystalline allomorph/Triton X-100 modified polydimethylsiloxane (AgNW-CNC II/TX-PDMS) electrodes fabricated through a full solution-processing strategy is proposed. Environmentally-friendly CNC II with high transmittance acts as an antioxidant, dispersant and film-former for AgNWs. The hydrophilic modification of TX to PDMS imparts the electrodes with self-adhesion, high stretchability, as well as strong interfacial bonding between TX-PDMS and AgNW-CNC II. The electrodes achieve skin-like modulus by adjusting TX content, endowing the EL devices with a high compliance (186 kPa of Young’s modulus). The luminescent layer with Cl-BT exhibits a high dielectric constant (19) and luminance (up to 72 cd m −2 ). The assembled EL device with excellent cyclic stability (luminance retention 85% after 400 cycles), durability (luminance retention >94% after 400 min) and stretchability (88% luminance at 200% strain) can work properly at broad temperatures (−20 ~ 70 °C) and underwater. This biocompatible and self-adhesive EL device demonstrates great potential for implantable biomedical devices and wearable displays under harsh environments.
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