ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Xiangjie Chen,Hongbing Ran,Yue Zhao,Yulin Wang,Xu Han,Yiwen Tang,Shiyu Wang
The abundant defects on the perovskite surface greatly impact the efficiency improvement and long-term stability of carbon-based perovskite solar cells. Molecules with electron-donating or electron-withdrawing functional groups have been cited for passivating various defects. However, few studies have investigated the potential adverse effects arising from the synergistic interactions among functional groups. Herein, we investigate the correlation between functional group configurations and passivation strength as well as the potential adverse impacts of strong electrostatic structures by methodically designing three distinct interface molecules functionalized with different ending groups, which both belong to biguanide derivatives, including 1-(3,4-dichlorophenyl) biguanide hydrochloride (DBGCl), metformin hydrochloride (MFCl), and biguanide hydrochloride (BGCl). The results indicate that DBGCl establishes comparatively mild active sites, not only passivates defects but also aids in forming a surface with a uniform potential. Conversely, MFCl exerts a more pronounced adverse effect on the perovskite surface, which is attributable to the electronic state perturbations induced by its functional groups. Due to the lack of hydrophobic groups, devices treated with BGCl demonstrate insufficient moisture resistance. Devices passivated with DBGCl demonstrate superior average efficiency, showcasing a 12% enhancement relative to the pristine. Furthermore, DBGCl-treated devices exhibit enhanced stability in three different environments, respectively, achieving the highest PCE retention rates under nitrogen conditions (25 °C), room-temperature air conditions (25 °C, RH = 40 ± 2%), and high-temperature air conditions (65 °C, RH = 40 ± 2%).
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Xinwen Sun,Weiwei Meng,Kwan Ho Ngai,Zhiguo Nie,Chuhao Luan,Wenjun Zhang,Shiang Li,Xinhui Lu,Bo Wu,Guofu Zhou,Mingzhu Long,Jianbin Xu
Suppressing trap-assisted nonradiative losses through passivators is a prerequisite for efficient perovskite light-emitting diodes (PeLEDs). However, the complex bonding between passivators and perovskites severely suppresses the passivation process, which still lacks comprehensive understanding. Herein, the number, category, and degree of bonds between different functional groups and the perovskite are quantitatively assessed to study the passivation dynamics. Functional groups with high electrostatic potential and large steric hindrance prioritize strong bonding with organic cations and halides on the perfect surface, leading to suppressed coordination with bulky defects. By modulating the binding priorities and coordination capacity, hindrance from the intense interaction with perfect perovskite is significantly reduced, leading to a more direct passivation process. Consequently, the near-infrared PeLED without external light out-coupling demonstrates a record external quantum efficiency of 24.3% at a current density of 42 mA cm −2 . In addition, the device exhibits a record-level-cycle ON/OFF switching of 20 000 and ultralong half-lifetime of 1126.3 h under 5 mA cm −2 . An in-depth understanding of the passivators can offer new insights into the development of high-performance PeLEDs.
研究领域:
材料科学
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光电子学
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半导体物理
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DOI
PubMed
高影响因子
Small
·
2024
·Vol. 20
·期 34
·2401669
·
IF 13
Hao Kong,Chenxu Zhao,Huifang Han,Huijing Liu,Pengchen Zou,Yao Fu,Kun Lang,Fan Shen,Xuewei Liu,Jia Xu,Jianxi Yao
The anti-solvent-free fabrication of high-efficiency perovskite solar cells (PSCs) holds immense significance for the transition from laboratory-scale to large-scale commercial applications. However, the device performance is severely hindered by the increased occurrence of surface defects resulting from the lack of control over nucleation and crystallization of perovskite using anti-solvent methods. In this study, 2-(naphthalen-2-yl)ethylamine hydriodide (NEAI) is employed as the surface passivator for perovskite films without using any anti-solvent. Naphthalene demonstrates strong π-π conjugation, which aids in the efficient extraction of charge carriers. Additionally, the naphthalene-ring moieties form a tight attachment to the perovskite surface. After NEAI treatment, FA and I vacancies are selectively occupied by NEA + and I − in NEAI respectively, thus effectively passivating the surface defects and isolating the surface from moisture. Ultimately, the optimized NEAI-treated device achieves a promising power conversion efficiency (PCE) of 24.19% (with a certified efficiency of 23.94%), featuring a high fill factor of 83.53%. It stands out as one of the reported high PCEs achieved for PSCs using the spin-coating technique without the need for any anti-solvent so far. Furthermore, the NEAI-treated device can maintain ≈87% of its initial PCE after 2000 h in ambient air with a relative humidity of 30% ± 5%.
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2025
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IF 4.3
Baoyang Dai,Shanshan Yan,Zhimi Chen,Tucai Zheng,Jie Qin,Junhua Zhao,Wanting Jin,Chunhui Zhou,Li Wan,Xing Su,Chuanhua Gao
Perovskite quantum dots (QDs) exhibit unique advantages, including a wide color gamut, narrow full width at half-maximum, cost-effectiveness, and high-efficiency luminescence, positioning them as a significant focus in contemporary optoelectronic research. Nevertheless, the synthesis of QDs often introduces crystal defects, while conventional in situ ligands can detrimentally affect the optoelectronic properties of perovskites. To overcome these challenges, we synthesized a symmetrical silane-based passivating agent containing phosphorus–oxygen double bonds. This agent enabled the in situ passivation of perovskites, significantly improving their optical performance and stability. Results showed that postpassivation QDs demonstrated bright green photoluminescence (PL) at 525 nm, with a 28% enhancement in PL intensity, a 16% increase in photoluminescence quantum yield, and an average lifetime (τave) extended by 191.2 ns. Furthermore, the thermal stability at 80 °C improved by 3.75-fold, and the stability under 84% relative humidity conditions increased by 21%. 1,3-bis(3-diethoxyphosphorylpropyl)-1,1,3,3-tetramethyldisiloxane (SPE)-passivated perovskites are viable for practical applications.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
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2024
·
IF 5.8
Weifeng Wu,Mengke Li,Jiang Tian,Feng Li,Yun Liu
Acid mine drainage (AMD) is a harmful effluent from mining activities. Surface passivation technology can prevent AMD production by coating minerals with passivation films. Previous study reported a composite passivator comprising γ-mercaptopropyltrimethoxysilane (PropS-SH) and halloysite loaded with benzotriazole (BTA). However, two issues persist in this work: the organosilane-based passivator requires passivating pyrite at 50~100 °C, and the encapsulation method for the guest passivator in halloysite is limited. To address these challenges, a novel self-healing composite passivator (PLHP passivator) was synthesized, using PropS-SH and lawsone as the main passivation agents and halloysite loaded with 8-HQ as the nanofillers. Polyelectrolytes were employed as the encapsulant within the nanofillers. The formation of a hydrophobic coating on the PLHP coated pyrite surface was revealed by SEM and contact angle tests. The enhanced oxidation resistance of PLHP coated pyrite over raw pyrite and other coated pyrite was verified by electrochemical measurements and chemical leaching tests. Notably, the PLHP coatings could passivate pyrite at room temperature, exhibiting excellent long-term stability and self-healing ability. Furthermore, the incorporation of polyelectrolytes expanded the application range of guest passivator. This paper provides new insights into overcoming the limitations of organosilane-based passivation and self-healing methods in current technology.
研究领域:
环境科学
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材料化学
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DOI
高影响因子
Light-Science & Applications
·
2025
·Vol. 14
·期 1
·1-9
·
IF 23.4
Liu Nian,Liu Zhengzheng,Huang Yuanlong,Du Peipei,Zhang Xiang,Leng Yuxin,Luo Jiajun,Du Juan,Tang Jiang
Vacuum-deposited perovskite light-emitting diodes (PeLEDs) have demonstrated significant potential for high-color-gamut active-matrix displays. Despite the rapid advance of green PeLEDs, red ones remain a considerable challenge because of the inferior photophysical properties of vacuum-deposited red-light-emitting materials. Here, a rationally designed fluorine-modified phosphine oxide additive was introduced to in-situ passivate vacuum-deposited perovskites. The highly polar 2-F-TPPO incorporated perovskite films demonstrated enhanced photoluminescence quantum yield (PLQY), suppressed defects, and improved crystallinity. When implemented as active layers in PeLEDs, an external quantum efficiency (EQE) of 12.6% with an emission wavelength of 640 nm is achieved, which was 6 times higher compared to the previously reported most efficient vacuum-deposited red PeLEDs (EQE below 2%). Our findings lay the foundations for the further exploration of high-performance vacuum-deposited PeLEDs toward full-color perovskite displays.
研究领域:
材料科学
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光电技术
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DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Lihui Liu,Yun Wang,Chenxi Liu,Jian Chen,Zijie Hou,Xuejing Liu,Kun Cao,Wei Shen,Shufen Chen
Metal halide perovskite light-emitting diode (PeLED) is the most promising candidate for next-generation display technology. However, the development of the blue PeLEDs is far behind the expectations. Mixed-halide perovskites demonstrate to be the most facile method to realize blue emission, which confronts serious spectra stability problem arising from the halide segregation. Here, a polymerizable passivator is introduced into the Cl/Br-mixed perovskites, which can simultaneously cross-link perovskite grains by interconnecting halides through hydrogen bonding, and transport the carriers through its π-conjugated backbone. Consequently, this cross-linked blue perovskite film demonstrates a significantly improved spectra stability under various external stimuli of high humidity, UV radiation, and electrical field, and the corresponding PeLED yields a decent external quantum efficiency of 12.0% at high brightness of 3390 cd m −2 with the emission at 478 nm. Notably, this work provides a unique cross-link agent with in situ polymerizability to address the ion migration and phase segregation issues without sacrificing the conducting capacity in mixed-halide perovskites.
研究领域:
材料科学
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光电技术
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化学工程
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2024
·
IF 8.2
Binyuan Gao,Zebin Han,Haina Cheng,Hongbo Zhou,Yuguang Wang,Zhu Chen
Acid mine drainage (AMD) induced by pyrite oxidation is a notorious and serious environmental problem, but the management of AMD in an economical and environmentally friendly way remains challenging. Here, lignin, a natural polymer and abundant waste, was employed as both a bactericide and passivator to prevent AMD formation. The addition of lignin to a mimic AMD formation system inoculated with Acidithiobacillus ferrooxidans at a lignin-to-pyrite weight ratio of 2.5: 10 reduced the combined abiotic and biotic oxidation of pyrite by 68.4 % (based on released SO 4 2− ). Morphological characterization of Acidithiobacillus ferrooxidans revealed that lignin could act on the cell surface and impair the cell integrity, disrupting its normal growth and preventing biotic oxidation of pyrite accordingly. Moreover, lignin can be used alone as a passivator to form a coating on the pyrite surface, reducing abiotic oxidation by 71.7 % (based on released SO 4 2− ). Through multiple technique analysis, it was proposed that the functional groups on lignin may coordinate with iron ions on pyrite, promoting its deposition on the surface. In addition, the inherent antioxidant activity of lignin may also be actively involved in the abatement of pyrite oxidation via the reduction of iron. Overall, this study offered a “treating waste with waste” strategy for preventing AMD formation at the source and opened a new avenue for the management of AMD.
研究领域:
环境科学
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化学工程
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材料科学
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微生物学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Junshuai Zhang,Jialong Duan,Qiaoyu Zhang,Qiyao Guo,Furi Yan,Xiya Yang,Yanyan Duan,Qunwei Tang
Intramolecular structure of interfacial passivator highly determines the bond strength with detrimental defects located at perovskite surfaces and grain boundaries. Herein, we investigate the steric-charge-dependence of various π-conjugated pyridine derivatives on electron-donating ability to passivate inorganic CsPbIBr 2 perovskite film. The primary results demonstrate that the photovoltaic performances tightly correlate with the multidentate coordination sites and structure-steric hindrance because of their synergistic regulation on intramolecular electron-cloudy density and charge extraction. Comparing to pyridine and terpyridine treated devices, the bipyridine passivated device delivers an increased efficiency of 11.04% with a high open-circuit voltage of 1.301 V and improved stability after persistent irradiation over 20 h and storage for 60 days, which is one of the highest efficiencies for carbon-based all-inorganic CsPbIBr 2 solar cells. This work provides a direction to choose ideal passivator for high-efficiency perovskite optoelectronics.
研究领域:
材料科学
·
光伏技术
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有机-无机杂化材料
·
能源材料
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Lihang Ma,Yi-bo Hu,Shuhan Li,Ting Du,Xinran Xiong,Yuanhuan Wu,Xiao-yan Li,Ming-Lai Fu,Baoling Yuan
Nanoscale zerovalent iron synthesized using borohydride (B-NZVI) has been widely applied in environmental remediation in recent decades. However, the contribution of boron in enhancing the inherent reactivity of B-NZVI and its effectiveness in removing hexavalent chromium [Cr(VI)] have not been well recognized and quantified. To the best of our knowledge, herein, a core–shell structure of B-NZVI featuring an Fe–B alloy shell beneath the iron oxide shell is demonstrated for the first time. Alloyed boron can reduce H+, contributing to more than 35.6% of H2 generation during acid digestion of B-NZVIs. In addition, alloyed B provides electrons for Fe3+ reduction during Cr(VI) removal, preventing in situ passivation of the reactive particle surface. Meanwhile, the amorphous oxide shell of B-NZVI exhibits an increased defect density, promoting the release of Fe2+ outside the shell to reduce Cr(VI), forming layer-structured precipitates and intense Fe–O bonds. Consequently, the surface-area-normalized capacity and surface reaction rate of B-NZVI are 6.5 and 6.9 times higher than those of crystalline NZVI, respectively. This study reveals the importance of alloyed B in Cr(VI) removal using B-NZVI and presents a comprehensive approach for investigating electron pathways and mechanisms involved in B-NZVIs for contaminant removal.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境修复
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产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 20
·2200417
·
IF 29.698
Yao Dong,Wenjian Shen,Wei Dong,Cong Bai,Juan Zhao,Yecheng Zhou,Fuzhi Huang,Yi-Bing Cheng,Jie Zhong
The interfacial properties for the buried junctions of the perovskite solar cells (PSCs) play a crucial role for the further enhancement of the power conversion efficiency (PCE) and stability of devices. Delicate manipulation of the interface properties such as the defect density, energy alignment, perovskite film quality, etc., guarantees efficient extraction and transport of photogenerated carriers. Herein, chlorobenzenesulfonic potassium salts are presented as a novel multifunctional agent to modify the buried tin oxide (SnO 2 )/perovskite interface for regular PSCs. The increasing number of carbon-chlorine bonds (C Cl) in 2,4,5-trichlorobenzenesulfonic potassium (3Cl-BSAK) exhibit efficient interaction with uncoordinated Sn, effectively filling oxygen vacancies in the SnO 2 surface. Importantly, synergistic effects of the functional group-rich organic anions and the potassium ion are achieved for reduced defect density, carrier recombination, and hysteresis. A champion PCE of 24.27% and the open-circuit voltage ( V OC ) up to 1.191 V for modified devices are obtained. The unencapsulated devices maintain 80% of their initial PCE after aging at 80 °C for 800 h in the atmosphere and 95% after aging for 100 d. With 3Cl-BSAK decoration, a high efficiency semitransparent PSC with a PCE of 12.83% and an average visible light transmittance (AVT) over 27% is also obtained.
研究领域:
光伏技术
·
材料科学
·
能源材料
·
半导体界面
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）