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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Nanoscale
·
2024
·Vol. 16
·期 18
·8931-8940
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IF 5.8
Rusong Sang,Yezi Hu,Zewen Shen,Guixia Zhao,Junrong Yue,Xiubing Huang
In light of the widespread use of fossil fuels and the resulting environmental pollution, it is crucial to develop efficient photocatalysts for renewable energy applications that utilize visible light. Organic photocatalysts based on β-ketoenamine offer several advantages, including facile preparation, high stability, structural controllability, and excellent photovoltaic properties. However, in previous studies, the synthesis of porous organic polymers (POPs) often involved long, high-temperature processes. In this study, POPs with donor (D)–acceptor (A) structure were constructed by utilizing various branched bridging groups and 2,4,6-triformylphloroglucinol, across multiple temperature gradients. Through adjustments in hydrothermal temperature, we successfully synthesized a series of POPs with varying enol–keto structure ratios. Among these POPs, the dimethoxybenzidine-POPs (DMDPOPs) with methoxy electron-rich branched chains exhibited superior photovoltaic performance, electron transfer rate, and photocatalytic activity compared to the dihydroxybenzidine-POPs (DHDPOPs) with electron-deficient hydroxyl branched chains. Notably, DMDPOP-30 demonstrated outstanding performance, achieving a conversion rate of 98% within 3 h. Additionally, other POPs exhibited favorable conversions (90%), further confirming the feasibility of this synthetic approach. Moreover, the synthesis of DMDPOP-30 was achieved under mild conditions at room temperature, highlighting its significant potential for practical applications.
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ACS Nano
·
2025
·
IF 16
Tongpeng Zhao,Ruiqin He,Tanghao Liu,Yanhao Li,De Yu,Yuxin Gao,Geyang Qu,Ning Li,Chunmei Wang,Huang Huang,Jiong Zhou,Sai Bai,Shumin Xiao,Zhaolai Chen,Yimu Chen,Qinghai Song
The power conversion efficiencies (PCEs) of polycrystalline perovskite solar cells (PC–PSCs) have now reached a plateau after a decade of rapid development, leaving a distinct gap from their Shockley-Queisser limit. To continuously mitigate the PCE deficit, nonradiative carrier losses resulting from defects should be further optimized. Single-crystal perovskites are considered an ideal platform to study the efficiency limit of perovskite solar cells due to their intrinsically low defect density, as demonstrated in bulk single crystals. However, current single-crystal perovskite solar cells (SC-PSCs) based on single-crystal thin film (SCTF) suffer from severe nonradiative carrier losses at the interface and in the bulk simultaneously due to the immature SCTF growth techniques. In this study, we show that the SC-PSCs can outperform state-of-the-art PC–PSCs, with MAPbI3 as an example, by suppressing carrier losses at the interface and in the bulk in device-compatible SCTFs through precisely controlling their growth.
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Dengkun Chen,Yusha Xie,Tao Chen,Tao Zhang,Yaosong Huang,Xiaoyan Qiu
Solution-processed NiO film is widely applied as the hole transport layer (HTL) of metal halide perovskite solar cells (PSCs). In general, a process temperature over 300 °C is necessary to improve the nucleation and crystallization of NiO grains. This temperature is higher than the glass transition temperature of most low-cost flexible substrates . In this paper, NiO nanoparticle water solution was prepared to spin-coat NiO films at a treatment temperature of 100 °C. The solar cell with the invert planar structure of ITO/NiO/CH 3 NH 3 PbI 3 /ZnO/Ag presented a power conversion efficiency of 11.24 %, which is comparable with that of similar CH 3 NH 3 PbI 3 solar cells with the NiO HTLs prepared at the high temperature. The water-processed NiO HTL greatly decreases the process temperature and simplifies the preparation process of PSCs, showing promising applications in low-cost flexible PSCs.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·
IF 3.8
Liao Zhengzheng,Hu Jinfang,Li Zhentao
CD-MONs (β-cyclodextrin-based microporous organic networks), derived from β-cyclodextrin, possess notable hydrophobic characteristics, a considerable specific surface area, and remarkable stability, rendering them highly advantageous in separation science. This research aimed to investigate the utility of CD-MONs in chromatography separation. Through a monomer-mediated technique, we fabricated an innovative CD-MON modified capillary column for application in open-tubular capillary electrochromatography (OT-CEC). The CD-MON-based stationary phase on the capillary’s inner surface was analyzed using Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). We assessed the performance of the CD-MON modified capillary column for separation purposes. The microstructure and pronounced hydrophobicity of CD-MON contributed to enhanced selectivity and resolution in separating diverse hydrophobic analytes, such as alkylbenzenes, halogenated benzenes, parabens, and polycyclic aromatic hydrocarbons (PAHs). The maximum column efficiency achieved was 1.5 × 10 5 N/m. Additionally, the CD-MON modified capillary column demonstrated notably high column capacity, with a methylbenzene mass loading capacity of up to 197.9 pmol, surpassing that of previously reported porous-material-based capillaries. Furthermore, this self-constructed column was effectively utilized for PAHs determination in actual environmental water samples, exhibiting spiked recoveries ranging from 93.2 to 107.9% in lake water samples. These findings underscore the potential of CD-MON as an effective stationary phase in separation science. Graphical Abstract
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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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Advanced Energy Materials
·
2024
·
IF 24.4
Xuchao Guo,Zhiqin Ying,Xin Li,Meili Zhang,Shiqian Su,Jingming Zheng,Haojiang Du,Yihan Sun,Jun Wu,Linhui Liu,Yuheng Zeng,Xi Yang,Jichun Ye
Inverted perovskite solar cells (IPSCs) suffer from significant non-radiative recombination losses at the defective perovskite/C 60 interface, limiting the efficiency and stability of perovskite/silicon tandem solar cells. Despite silicon oxide (SiO X ) being a common passivation material in the silicon industry with higher electron selectivity than conventional atomic layer-deposited alumina, its application in IPSCs is limited by its tendency to damage sensitive perovskite during processing. Here, an oblique angle evaporation method is developed to deposit a conformal, ultra-thin SiO X layer without damaging the underlying perovskite. This SiO X interlayer not only chemically passivates under-coordinated Pb 2+ defects but also forms an n/n+ homojunction that provides effective field-effect passivation, concurrently reducing recombination and enhancing electron selectivity. As a result, extending this strategy to two-terminal monolithic perovskite/tunnel oxide passivating contact silicon tandem solar cells achieves a stabilized power conversion efficiency of 30.2%, representing one of the highest efficiencies reported for such tandems. More importantly, the robust inorganic nature of SiO X enables it to serve as a dense inner encapsulation, enhancing both light (ISOS-L-1) and thermal (ISOS-D-2I) device stabilities.
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Journal of Physical Chemistry C
·
2024
·
IF 3.3
Wenjing Zhai,Wenhao Zheng,Penghui Shi,Lin Huang,Xiaomin Cui,Peizhuo Chen,Yuxia Tang,Lin Lin,Zhibo Yan,Jun-Ming Liu
Silver bismuth iodide (Ag–Bi–I) is considered to be a potential photovoltaic material as an eco-friendly semiconductor with a suitable band gap and high stability. However, the reported highest PCE is still far below the ideal value, and the quality of the AgxBiyIx+3y film deserves to be further improved. Herein, we introduce a facile strategy to control the crystallization of AgBiI4 by adding Lewis base additives thiourea (TU) to the AgBiI4 precursor solution. The result indicates that coordination between TU and AgBiI4 precursor solution improves the crystallization, reduces the defect density, and increases the carrier mobility of the AgBiI4 film. The treatment of the TU additive boosts light absorption, reduces charge recombination, and facilitates charge extraction, resulting in improved photovoltaic performance of the AgBiI4 solar cell. Compared to the control device, the treatment of 0.9 mM TU increases the PCE (∼1.87%) of the solar cell by 19.9% and improves the air stability of the solar cell.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaomeng Ni,Jingjing Liu,Fangxian Xu,Jing Zhang,Sai Jiang,Bijun Fang,Huafei Guo,Ningyi Yuan,Jianning Ding,Shuai Zhang
Doping the light absorber layer of antimony chalcogenides with extrinsic ions is an effective approach for improving their photovoltaic quality. These dopant ions generally reside at positions other than the crystal lattice or form an alloy (e.g., AgSb(S,Se) 3 ) with a poor device performance. Therefore, incorporating such ions into an antimony chalcogenide lattice such that there is a positive influence on device quality would be highly useful. Herein, doping of Nd 3+ for Sb 2 (S,Se) 3 is carried out via a modified hydrothermal deposition process. Notably, these ions are incorporated into the crystal lattice and migrate to the CdS/Sb 2 (S,Se) 3 interface after doping, which are characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry. Nd 3+ doping produces benign effects on the crystal orientation, film morphology, optoelectronic properties, and defect passivation of the Sb 2 (S,Se) 3 films. Consequently, all the photoelectrical parameters of Sb 2 (S,Se) 3 solar cells doped with Nd 3+ are enhanced, delivering a remarkable efficiency of 8.24 %. Furthermore, the best device stored in air only shows a slight decrease in efficiency in the 2400-h aging test. Overall, this study provides an effective doping strategy to improve the photovoltaic quality of Sb 2 (S,Se) 3 films.
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ORGANIC ELECTRONICS
·
2024
·
IF 2.7
Rufeng Wang,Jian Ni,Jiayi Guan,Zhiwei Yang,Jun Li,Shuai Zhang,Sen Li,Tiantian Li,Juan Li,Hongkun Cai,Jianjun Zhang
Solution-processed CsPbI 3 perovskite quantum dots (PQDs) have attracted enormous attention in both photovoltaic and electroluminescent applications in recent years. However, the surface defects of CsPbI 3 PQDs in the ligand exchange procedure still suffer the challenge of imperfect passivation , leading to poor device performance and ambient stability. In this work, we propose a modified surface ligand management to deposit CsPbI 3 PQD films using a layer-by-layer (LBL) solid-state exchange strategy, and its applications in photovoltaic and electroluminescent devices are studied. The conjugated phenethylammonium iodide (PEAI) ligand, acting as a short-chain ligand with a phenyl group (PEA + ion) for encapsulating the CsPbI 3 PQDs during the LBL procedure, which can both realize enhanced inter-dot coupling and defects passivation compared with conventional post-treatments. We further demonstrate the balanced transport and injection of electrons and holes within the PEAI-LBL based CsPbI 3 PQD films. With this approach, the CsPbI 3 PQD solar cells based on PEAI-LBL yielded a champion power conversion efficiency (PCE) of up to 14.18% with a high open voltage of 1.23 V, along with obviously electroluminescent red emission properties in one device. Meanwhile, the unencapsulated devices exhibited excellent stability under a high-humidity environment. This strategy should accelerate advancement in utilizing PQDs for bifunctional optoelectronic applications .
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Limin Lai,Guiyuan Liu,Yibo Zhou,Xiaoyu He,Ying Ma
Two-dimensional (2D) perovskites have been widely adopted for improving the performance and stability of three-dimensional (3D) metal halide perovskite devices. However, rational manipulation of the phase composition of 2D perovskites for suitable energy level alignment in 2D/3D perovskite photodetectors (PDs) has been rarely explored. Herein, we precisely controlled the dimensionality of the 2D perovskite on CsPbI2Br films by tuning the polarity of the n-butylammonium iodide (BAI)-based solvents. In comparison to the pure n = 1 2D perovskite (ACN-BAI) formed by acetonitrile treatment, a mixture of n = 1 and n = 2 phases (IPA-BAI) generated by isopropanol (IPA) treatment guaranteed more robust defect passivation and favorable energy level alignment at the perovskite/hole transport layer interface. Consequently, the IPA-BAI PD exhibited a responsivity of 0.41 A W–1, a detectivity of 1.01 × 1013 Jones, and a linear dynamic range of 120 dB. Furthermore, the mixed-phase 2D layer effectively shielded the 3D perovskite from moisture. The IPA-BAI device retained 76% of its initial responsivity after 500 h of nonencapsulated storage at 10% relative humidity. This research provides valuable insights into the dimensional modulation of 2D perovskites for further enhancing the performance of 2D/3D perovskite PDs.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Potao Sun,Zhaoping Li,Wenxia Sima,Tao Yuan,Ming Yang,Kaisen Fan,Xiaoxiao Chen,Wenlong Pang
The long-term operation of power equipment and power electronics can cause local overheating and discharges in the insulation material, resulting in irreversible insulation damage. Further development of such damage can eventually lead to equipment failure, but this problem is very difficult to solve. In this paper, inspired by how the petals of morning glory change color with the environment due to the presence of pigmented globules, a dual-function heat alert in the form of a self-healing (HASH) microcapsule with a nested structure is prepared by using microfluidic technology. By combination of the microcapsule with the insulation material, the local overheating in equipment can be detected promptly under live operating conditions without manual external intervention, and the defects that occur can be repaired autonomously. These HASH microcapsules can be pre-embedded in places at which the material is prone to overheating using artificial magnetic targeting. The doping of the matrix material with microcapsules does not cause any deterioration in its electrical or mechanical properties. This technology is expected to be applied to electrical equipment and electronic devices to allow for the early detection of local overheating and the autonomous repair of defects, thereby ensuring the safety of the equipment and improving its service life.
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