Surfaces and Interfaces
·
2024
·
IF 5.7
Jinhuan Jiang,Chenyang Shi,Lixin Song,Pinfan Du,Wen Guo,Jie Xiong
Non-radiative recombination due to high-density defects at the bottom of the perovskite layer and in the SnO 2 ETL layer is not favourable for charge transfer. In this work, disodium diphenylsulfone-4,4′-dichloro-3,3′-disulfonate (SDCDPS) was introduced into SnO 2 solution to prepare a high-quality pinhole-free SnO 2 film. The sulfonate of SDCDPS collaborates with diphenylsulfone to passivate uncoordinated Sn 4+ in SnO 2 ETL, which will reduce the work function (W F ) in the SnO 2 , increasing the conduction of SnO 2 film and reducing the charge recombination of pre-buried interface. Besides, the sulfonate and diphenysulfone groups also passivate the uncoordinated Pb 2+ in perovskite to increase the crystallinity of perovskite and reduce non-radiative recombination. After SDCDPS modification, the power conversion efficiency of perovskite solar cells significantly increased from 18.2% to 21.2% with hysteresis factor decreasing from 10.4% to 3.35%. Also, the modified device shows well stability due to the enhancement of perovskite crystallization and the reducing defects. Under relative humidity of ∼60%, the PCE of the unencapsulated device modified by SDCDPS remains at 81% of the initial device after 720h. This work offers a dependable method for enhancing the quality of the buried interface in PSC and to pursue productive and consistent devices.
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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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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qi Fu,Jiaxin He,Jiajun Zheng,Yanjun Xing,Qiuxiang Wang,Jiaxing Xiong,Wendong Zhu,Rong Xuan,Anan Fu,Xinlei Gan,Like Huang,Xiaohui Liu,Yuejin Zhu,Jing Zhang
Silver nanowire (Ag NW)-based transparent back electrodes prepared via all solution-process are promising for bifacial and semitransparent perovskite solar cells (PSCs). However, the inadequate electrical contact between the silver nanowires themselves and the contact with substrate leads to reduced overall solar cell performance; meanwhile, serious corrosion of Ag NW in ambient environment restricting the further applications. In this work, polyvinylpyrrolidone (PVP) as a binder in Ag NW electrode significantly enhances the conductivity and transparency at the same time improving the interface electric contact. The PSC with PVP modified Ag NW electrode demonstrated frontside and backside efficiency approaching 18 % and 14.1 % (AM1.5, 1 Sun), respectively, which achieves 82 % efficiency with normal Ag device and bifacial factor of 79 %. The long-term storage stability of PSC is also improved by PVP protection. The final device structure is ITO/Ni O x /MeO/(FA0.92MA0.08)0.95Cs0.05Pb(I0.9Br0.1)3/PEAI/PC61BM/BCP/ Ag NW. This work highlights the method to fabricate robust transparent Ag NW electrode for bifacial perovskite solar cells .
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuang Wei,Kexin Li,Sheng Zhong,Ruirui Zhang,Guosheng Wang,Ruixia Liu
Selective conversion of inert C–H bonds in alkanes into high-value-added functional groups (alcohols, ketones, carboxylic acids, etc.) plays a vital role in establishing a green and sustainable chemical industry. Catalytic selective oxidation of cyclohexane to KA oil (cyclohexanol and cyclohexanone) is a typical representative of alkane functionalization. In this work, hollow cage-like Co3O4 (Co3O4-C) and particle Co3O4 (Co3O4-P) were synthesized by calcining two types of Prussian blue analogues (PBAs), which were used to catalyze the selective oxidation of cyclohexane. The Co3O4-C predominantly exposed (311) crystal plane is easier to adsorb cyclohexane than Co3O4-P, which is beneficial to shorten the induction period, accelerate the reaction rate, and improve the conversion. Consequently, Co3O4-C displayed a 10% conversion of cyclohexane within 1 h, and the KA oil selectivity reached 90%. The Co3O4-P exposed (220) crystal plane has a higher molar percentage of oxygen vacancies and more active oxygen species, as well as a strong cyclohexanone adsorption capacity, which is conducive to the deep oxidation of cyclohexanone to adipic acid and other diacid products. The mechanism analysis of cyclohexane oxidation catalyzed by PBA-based Co3O4 shows that it exemplifies the feasibility to tailor the surface of catalysts by modulating the PBAs, which ultimately influences their reaction performance for accelerating the reaction and maintaining high cyclohexane conversion and KA oil selectivity.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yuetian Du,Dong Wang
Although considerable progress has been made in developing different types of vitrimers, ongoing challenges remain in tuning their mechanical and rheological properties, self-healing, and adhesion. Here, we demonstrate a one-pot method to produce a novel double-network epoxy vitrimer using an aliphatic amine cross-linker with a siloxane covalent bond and an aromatic amine cross-linker with a disulfide covalent bond. When a controlled two-stage curing process is employed, the markedly different reactivities of aliphatic amine and aromatic amine with epoxy allow for sequential cross-linked network formation, leading to the development of a double network that incorporates two types of dynamic covalent bonds. As a result, the produced vitrimers exhibit controllable mechanical, thermal, and rheological properties, as well as recyclability. This is evidenced by a tensile strength as high as 72 MPa, while maintaining ∼10% elongation at break, a wide glass-transition temperature range from 91 to 171 °C, and an adjustable two-stage stress relaxation. These characteristics suggest opportunities to develop high-performance cross-linked polymers with specific responses to time and temperatures.
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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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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 19
·28525-28537
·
IF 0
Qiu Rui,Chen Aiyin,Zhang Peng,Tang Xuejiao,Wang Cuiping,Sun Hongwen
Herein, novel catalysts of Fe-containing zeolite-A (Fe/zeolite-A) were synthesized by exchanging iron ions into zeolite-A framework, and short-chain organic acids (SCOAs) were employed as chelating agents. Reactive Brilliant Blue KN-R (KN-R) was used as a model pollutant to evaluate the performance of these catalysts based on the heterogeneous Fenton reaction. The results showed that Fe-OA/3A, which applied zeolite-3A as the supporter and oxalic as the chelating agent, presented the most prominent KN-R decolorization efficiency. Under the initial pH of 2.5, 0.4 mM KN-R could be totally decolorized within 20 min. However, the mineralization efficiency of KN-R was only 58.2%. Therefore, anthraquinone dyes were introduced to modify zeolite-3A. As a result, the mineralization efficiency of KN-R was elevated to 92.7% when using Alizarin Violet (AV) as the modifier. Moreover, the modified catalysts exhibited excellent stability, the KN-R decolorization efficiency could be maintained above 95.0% within 20 min after operating for nine cycles. The mechanism revealed that the Fe(II)/Fe(III) cycle was accelerated by AV-modified catalyst thus prompting the KN-R decolorization in Fenton-like system. These findings provide new insights for preparing catalysts with excellent activity and stability for dye wastewater treatment.
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Nanoscale
·
2024
·
IF 5.8
Zhiqiang Ming,Siyao Li,Xinyi Luo,Siman Liu,Danliang Zhang,Xiaoli Zhu,Anlian Pan,Xiao Wang
Quasi-2D perovskites have emerged as a promising candidate material for displays owing to their high photoluminescence quantum yields and low-cost solution synthesis. However, achieving pure red quasi-2D perovskite films with luminescence centered at 630 nm and a narrow emission band presents a critical challenge for high-definition displays. Herein, by incorporating 18-crown-6 as additives that simultaneously passivate defects and regulate phase distribution, full iodine-based quasi-2D perovskite films with a single red emission peak and spectral stability are designed. Additionally, through the introduction of an appropriate amount of chlorobenzene and enhancement of annealing temperature, resulting in a narrower phase distribution, the full width at half maximum (FWHM) of the emission peak is significantly reduced. After optimization of the process, we fabricated quasi-2D perovskite films with pure red emission, which exhibited a PL peak at 627.9 nm and a narrow FWHM of 45.1 nm. Based on these pure red perovskite films, diverse complex patterns such as fluorescent anti-counterfeiting labels are implemented for data storage and information encryption. This study provides an effective approach toward developing quasi-2D perovskites with high color purity for high-definition purposes.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 25
·2424645
·
IF 19
Zhefeng Liu,Rui Wang,Jianing Han,Tianhao Chen,Zichao Deng,Yalan Sun,Yongbin Zhao,Aihua Chen
Wearable blue-green photodetectors have attracted considerable attention in underwater and medical applications. However, semiconductor-based photodetectors generally suffer from inevitable performance deterioration because of elastic modulus mismatch between rigid inorganic materials and polymer matrixes. Besides, most of the photodetectors reported so far can't be used on both sides and the multiple functionalizations can only be realized by stacking different types of devices. Herein, an intrinsically flexible and size-customizable blue-green photodetector has been fabricated based on well-designed composite fabrics with oriented electrospun fibers, consisting of pseudo-stilbene azobenzene-containing cross–linked liquid crystalline polymers (NAzo-CLCP) and piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanogenerator. Taking advantage of the synergistic effect between liquid crystalline alignment and polymer networks, the NAzo-CLCP devices construct a consecutive and efficient conversion of illuminance – internal stress – electric signal. A responsivity of 233 mV W −1 is achieved in voltage signals and a comparable response time of 0.1 s in current signals compared to the reported wearable semiconductor-based photodetectors. Benefiting from the inherent flexibility and compatibility of the hydrophobic fabrics, the NAzo-CLCP devices exhibit robust stabilities under cyclic irradiations, humidity and temperature variations, and especially slightly dynamic conditions, fulfilling basic requirements for wearable electronics. For practical applications, a photodetector array for light positioning based on blue light and a bracelet for real-time health monitoring based on green light are developed. Profiting from the uniformity of the fabrics and the consistency of detection performance, the integrated bifunction of code transmission and health monitoring over a double-sided one-piece photodetector has been realized for the first time, providing extensive potential for wearable electronics based on the NAzo-CLCP fabrics.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Mengyao Liu,Meng Cai,Peng Gao,Xuanchen Xu,Zongwei Chen,Yajie Chen,Weiwei Chen,Yanlin Song,Junjie Ma,Chongxin Shan
Bifacial perovskite solar cells present a promising strategy to enhance power output by capturing light from both sides. A micrometer-thick perovskite film is highly desired for extending the light absorption path under bifacial illumination conditions, thereby improving overall efficiency. However, this route intensifies the notorious “thick-thin dilemma,” a challenge posed by the reciprocal constraints between photon coupling and carrier dynamics. While thicker films excel at photon absorption, thinner films are more suitable for long-range electron transport. Here, these limitations s are addressed by engineering a novel “linear-graded-junction” to enhance carrier drift within the perovskite depletion region, avoiding the introduction of additional interface imperfections. A self-doping effect is initiated through Fick-diffusion engineering, which generates a strong built-in electric field and establishes a cascade-like energy band profile. This results in a remarkable 116% enhancement in carrier mobility and a 195% increase in diffusion length. Consequently, the resulting bifacial PSCs yield a power generation density of 26.03 mW cm −2 in all-inorganic perovskite on a scale of 3 µm without adding any organic additives, setting a new benchmark in thick-film PSCs. This approach holds promise for overcoming the long-standing thick-thin trade-off, significantly advancing the industrial viability of high-performance PSCs.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Tianhong Zhou,Shuming Chen
Quantum dot light-emitting diodes (QLEDs) exhibit pronounced thermal- and size-dependent charge injection, characterized by significantly enhanced current under elevated temperatures and reduce device areas. In this study, the underlying mechanisms are elucidated by examining the influence of thermal energy on carrier transport dynamics. This analysis reveals that hole transport is governed by a hopping mechanism, leading to markedly increased hole mobility at higher temperatures, which is a primary contributor to the thermal-dependent current enhancement. This improved hole injection promotes better charge balance and increase luminance. Furthermore, both thermal effect and lateral resistance is identified as key contributors to the size-dependent current behavior. Smaller-area QLEDs exhibit reduced lateral resistance and more pronounced thermal effect, resulting in higher current injection. By leveraging these thermally and geometrically enhanced hole injection characteristics, the application of QLEDs is demonstrated as multi-dimensional visual temperature sensors and realize significantly stronger emission from high-energy excitonic state (1P) transitions in small-area devices.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Meiqin Xiao,Simin Gong,Jonghee Yang,Yi Wang,Junyu Nie,Wenzhe Li,Jiang Cheng,Hongkang Xu,Wei Zhang,Junzhong Wang,Ping Chen
Ion migration, especially taking place at the interface of perovskite/charge transport layer, poses great threats to the stability of perovskite light–emitting diodes (PeLEDs). However, the existing strategies mitigating ion migration sacrifice efficient charge injection, thus limiting the PeLED performances. Herein, an interfacial layer of a biaxially charge-polarized molecule, bi-4-(N-carbazolyl)phenyl)phenylphosphine oxide (BCPO), is applied. The strong surface coordination of BCPO not only manifests a high-quality metal halide perovskites (MHPs) emitter with improved defect passivation and crystallinity but also establishes a rigorous vertical dipole alignment, inducing band-bending for favorable electron injection. Additionally, the in-plane geometry of the electron-withdrawing carbazolylphenyl units achieves intimate lateral electrostatic contact with the MHPs surface, realizing stronger chemical interaction that suppresses the escape of halide at the interface. Encouraged by these achievements, the optimized PeLEDs with BCPO demonstrate maximum external quantum efficiency of 25.8% and T 50-EL lifetime of 13.4 h, representing one of the best green PeLEDs reported. This work newly opens a synergistic strategy, combined with molecular structure design and interfacial engineering, for simultaneously realizing efficient and color-stable PeLEDs, which tackles the crucial challenges for their commercialization.
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