CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiangqiang Zhao,Dachang Liu,Zhipeng Li,Bingqian Zhang,Xiuhong Sun,Zhipeng Shao,Chen Chen,Xiao Wang,Lianzheng Hao,Xianzhao Wang,Caiyun Gao,Yimeng Li,Panyu Chen,Xiaoxu Zhang,Shuping Pang,Guanglei Cui,Li Wang
The material and microstructure of the carrier-selective layers in the perovskite solar cells are important to determining their efficiency and stability. Planar SnO 2 is the most commonly used inorganic electron transport layer, but there are few reports of its mesoporous structure because of the degradation of hole-blocking property after high temperature sintering. Here, the chemical bath deposition method was optimized to realize low-temperature in-situ deposition of mesoporous SnO 2 layer on FTO substrates. On one hand, the increased interface contact area improves electron injection from the perovskite layer to the SnO 2 , yielding an impressive increase of the power conversion efficiency from 22.09% to 24.11%. And on the other hand, thanks to the increased mechanical strength of the interface, the device with mesoporous SnO 2 retains 90% of its initial power conversion efficiency after 1000 h operation under continuous one-sun illumination.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Mengjia Li,Jike Ding,Zuolin Zhang,Quanxing Ma,Chao Li,Menghan Lu,Hong Zhang,Thierry Pauporté,Wenlong Mo,Jian-Xin Tang,Jiangzhao Chen,Cong Chen
The instability of perovskite precursor solution induced by deprotonation of organic cations and oxidation of iodide ions substantially deteriorates the reproducibility and reliability of the photovoltaic performance of perovskite solar cells (PSCs). The above decomposition reactions can be conquered via the synergistic engineering of organic functional groups. However, how spatial conformation and type of weak acid functional groups impact the stability of perovskite precursor solution remains to be investigated. Herein, it is uncovered that the position of functional groups on the benzene and the type of weak acid functional groups remarkably influence the acid dissociation constant (p K a ) and thus the stability of perovskite inks. The p K a plays a decisive role in suppressing the deprotonation of organic cations and following the amine-cation addition-elimination reaction. The 4-hydrazinobenzenesulfonic acid (4-HBSA) with the lowest p K a is optimal in stabilizing perovskite inks and mitigating nonradiative recombination through defect passivation. This breakthrough enables the inverted PSCs to deliver a power conversion efficiency (PCE) of 26.79% (certified 26.36%, the highest PCE value for PSCs prepared in ambient conditions) using vacuum flash evaporation technology. The modulated PSC could maintain 92% of its initial efficiency after 2000 h of continuous maximum power point tracking.
研究领域:
材料科学
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光伏技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 1
·2201778
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IF 10.05
Qiangqiang Wang,Shuo Ding,Siliang He,Ting Zhang,Lei Qian,Peng Xiao,Tao Chen,Chaoyu Xiang
Although organic metal halide perovskite light-emitting diodes (PeLEDs) have been developed rapidly in recent years, their commercialization and further applications are still hindered by ion migration-induced inferior operational stability. Although the formation of a quasi-2D structure is a well-known solution that can efficiently suppress ion migration, the operation lifetime improvement is still limited. In this study, long-chain phenylbutanammonium is used to replace the commonly used phenethylammonium as the L-site cations. With large steric hindrance, ion migration inside the PeLEDs is effectively suppressed. Consequently, the PeLED with near-infrared emission at 763 nm exhibited an operational lifetime ( T 90 ) of up to 5.3 h, which is 53-fold higher than that of the control device. This study demonstrates the feasibility of significant stability improvement using a simple cation engineering strategy for PeLEDs.
研究领域:
材料科学
·
光电子学
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半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2019
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IF 15.548
Xiaodong Li,Sheng Fu,Shiyu Liu,Yulei Wu,Wenxiao Zhang,Weijie Song,Junfeng Fang
Operational stability remains the foremost concern delaying the commercialization of perovskite solar cells (PSCs). Ions diffusion from iodine-rich perovskite layer to metal electrode is one main reason for the irreversible devices degradation. Here we introduce chemically crosslinked TMTA (trimethylolpropane triacrylate) at both bulk perovskite layer and perovskite/PCBM interface to suppress the ions diffusion toward electrode. The TMTA in perovskite layer suppresses ions migration along grain boundaries and TMTA at perovskite/PCBM interface blocks ions diffusion toward electrode, owing to its continuous network structure and chemically inert nature. Diffusion experiment, permeation experiment and resistive random-access memory (RRAM) investigation confirm the effectively blocked ions diffusion in PSCs with TMTA whether under heat, light or electric field conditions. The resulting PSCs exhibit 7-fold improvement in operational stability at elevated temperature of 60 °C, retaining ~80% of initial efficiency after maximum power point tracking for 1000 h under continuous illumination. The PSCs with TMTA also exhibit good thermal stability and retain over 90% of the initial efficiency after aging at 60 °C for 1000 h.
研究领域:
材料科学
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光伏技术
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纳米材料
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能源化学
·
器件物理
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Meng Hao,Yang Yusen,Shen Tianyao,Liu Wei,Wang Lei,Yin Pan,Ren Zhen,Niu Yiming,Zhang Bingsen,Zheng Lirong,Yan Hong,Zhang Jian,Xiao Feng-Shou,Wei Min,Duan Xue
The metal-support interaction (MSI) in heterogeneous catalysts plays a crucial role in reforming reaction to produce renewable hydrogen, but conventional objects are limited to single metal and support. Herein, we report a type of RhNi/TiO 2 catalysts with tunable RhNi-TiO 2 strong bimetal-support interaction (SBMSI) derived from structure topological transformation of RhNiTi-layered double hydroxides (RhNiTi-LDHs) precursors. The resulting 0.5RhNi/TiO 2 catalyst (with 0.5 wt .% Rh) exhibits extraordinary catalytic performance toward ethanol steam reforming (ESR) reaction with a H 2 yield of 61.7%, a H 2 production rate of 12.2 L h −1 g cat −1 and a high operational stability (300 h), which is preponderant to the state-of-the-art catalysts. By virtue of synergistic catalysis of multifunctional interface structure (Rh-Ni δ − -O v -Ti 3+ ; O v denotes oxygen vacancy), the generation of formate intermediate (the rate-determining step in ESR reaction) from steam reforming of CO and CH x is significantly promoted on 0.5RhNi/TiO 2 catalyst, accounting for its ultra-high H 2 production.
研究领域:
催化
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Shilong Feng,Zan Zhang,Xinrong Li,Mengke Li,Yi Feng,Xiaojie Zhang
Proton exchange membranes (PEMs) serve as multifunctional ionic transport platforms for electrochemical systems, necessitating optimization of the proton conduction efficiency, mechanical integrity, and long-term operational stability. This work presents an approach of introducing sulfonic groups that incorporate sulfonated amide organic frameworks (SAOF) into nonsulfonated poly(ether sulfone) (PES) to create rigid proton transport nanoarchitectures. The sulfonated zwitterionic SAOF facilitates sulfonic acid groups and amide structures to function as hydrogen bonds, enabling Grotthuss-dominated dual-mechanism proton migration with low activation energy. Moreover, the reconfigurable hydrogen bonds and sulfonic acid groups of SAOF enhance the hydrophilic nanodomains, allowing the PES-SAOF hybrid membrane to surpass conventional conductivity–swelling trade-offs. The PES-SAOF-20% membrane attains a proton conductivity of 0.19 S cm–1 at 80 °C and 100% relative humidity, exceeding the pristine PES membrane by 200%, while exhibiting a 6.8% loss in conductivity over 30 days of continuous operation.
研究领域:
材料科学
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化学工程
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电化学
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高分子科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xin Zhang,Licai Chen,Yunliang Zhao,Yupeng Sun,Renbo Gao,Yanhui Miao,Shuai Cheng,Songliang Ma,Haoyu Bai,Tingting Zhang
Interfacial polymerization (IP) is a common approach for preparing selective nanofiltration (NF) membranes for efficient lithium extraction from salt-lake brines, yet controlling the structure and thickness of the polyamide (PA) selective layer remains challenging. In this study, a two-dimensional montmorillonite (2D MMT) layer was incorporated into the IP process to regulate interfacial reaction behavior. The 2D MMT layer was conducive to enriching amine monomers and inhibiting diffusion rate, thereby resulting in a thinner PA selective layer and the reduced water transport resistance. At the same time, the increased density of amine groups on the membrane surface implied that the membrane has a higher positively charge, which is more favorable for the Mg 2+ /Li + selective separation. As-optimized 2D MMT modified PA membrane demonstrated a high Mg 2+ /Li + selectivity of 35.45, nearly 6 times as high as that of the bare PA membrane. In addition, the stronger hydrophilicity of the 2D MMT modified PA membrane effectively retarded contamination, contributing to the long-term operational stability of the membrane and prolonging service life. This work provides a versatile strategy for enhancing NF membrane performance by employing 2D clay nanosheets to modulate the IP process. As-modified 2DMMT-PA membrane is suitable for practical applications in sustainable lithium resource recovery.
研究领域:
膜科学
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材料工程
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分离技术
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环境工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-12
·
IF 17.694
Liu Yongjie,Tao Chen,Cao Yu,Chen Liangyan,Wang Shuxin,Li Pei,Wang Cheng,Liu Chenwei,Ye Feihong,Hu Shengyong,Xiao Meng,Gao Zheng,Gui Pengbing,Yao Fang,Dong Kailian,Li Jiashuai,Hu Xuzhi,Cong Hengjiang,Jia Shuangfeng,Wang Ti,Wang Jianbo,Li Gang,Huang Wei,Ke Weijun,Wang Jianpu,Fang Guojia
Formamidinium lead iodide (FAPbI 3 ) perovskites are promising emitters for near-infrared light-emitting diodes. However, their performance is still limited by defect-assisted nonradiative recombination and band offset-induced carrier aggregation at the interface. Herein, we introduce a couple of cadmium salts with acetate or halide anion into the FAPbI 3 perovskite precursors to synergistically passivate the material defects and optimize the device band structure. Particularly, the perovskite analogs, containing zero-dimensional formamidinium cadmium iodide, one-dimensional δ-FAPbI 3 , two-dimensional FA 2 FA n-1 Pb n I 3n+1 , and three-dimensional α-FAPbI 3 , can be obtained in one pot and play a pivotal and positive role in energy transfer in the formamidinium iodide-rich lead-based perovskite films. As a result, the near-infrared FAPbI 3 -based devices deliver a maximum external quantum efficiency of 24.1% together with substantially improved operational stability. Combining our findings on defect passivation and energy transfer, we also achieve near-infrared light communication with device twins of light emitting and unprecedented self-driven detection.
研究领域:
材料科学
·
光电
·
半导体物理
✓ 已验证
DOI
PubMed
高影响因子
EcoMat
·
2022
·Vol. 4
·期 2
·e12184
·
IF 12.213
Baiqian Wang,Chen Chen,Xin Yang,Wensi Cai,Shuangyi Zhao,Ru Li,Wen Ma,Jiangzhao Chen,Zhigang Zang
Owing to the excellent optical properties, white light-emitting diodes (WLEDs) based on metal halide perovskites have attracted great attention as promising light source for solid-state lighting and wireless visible light communication (VLC). However, the instability and toxicity of classic hybrid lead halides hinder their practical applications. Here, a pressure-assisted cooling method is developed to grow lead-free Cs 3 Cu 2 I 5 and CsCu 2 I 3 single crystals, which exhibit more excellent stability, larger size and uniform orientations in comparison with pressure-free cooling method. Then, both single crystals are used as the emitters of WLEDs without encapsulation, exhibiting a high Color Rendering Index of 91, a decent Commission Internationale de l'Eclairage coordinate of (0.33, 0.33), a proper Correlated Color Temperature of 5436 K, as well as an excellent 1350-h operating stability at atmosphere. Furthermore, the prepared WLEDs are utilized in wireless VLC, which possesses a −3 dB bandwidth of 10.1 MHz.
研究领域:
材料科学
·
光电
·
固态照明
·
可见光通信
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 48
·18147-18153
·
IF 8.067
Jiayu Zhang,Xikun Zou,Lei Jin,Jiamin Sun,Bohua Zhang,Wei Li,Haoran Zhang,Mingtao Zheng,Yingliang Liu,Xiaotang Liu,Xuejie Zhang,Bingfu Lei
It is very crucial to select appropriate plant lighting sources to supplement light for plants according to their different requirements for light during different growth periods. However, LED-driven plant lighting sources confront the challenges of long-term operation stability and modular light color switching requirements. Herein, red emitting, far-red emitting, and patterned multi-color emitting phosphor–sapphire composite (PSC) samples were fabricated by co-sintering CaAlSiN3:Eu2+/Gd2.4Lu0.6Ga4AlO12:Cr3+ and low-melting glass powder on sapphire plates. The phase, microstructure, and luminescent properties of these PSC specimens were systematically investigated. Notably, after 34 days of continuous operation, the luminescence intensity of the fabricated high power plant lighting LED device can maintain 93% of its initial integrated intensity, benefitting from robust resistance to light irradiation and thermal shock. Moreover, the emitting color of these modular high power LED devices can be easily switched by using different PSC samples depending on the light color need of the plants. All these results indicate that the PSC samples reported in this paper have merits of easy fabrication, low cost and long-lifetimes, showing promising applications in the field of plant growth lighting.
研究领域:
植物科学
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材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Zhang Weichuan,Liu Ziyuan,Zhang Lizhi,Wang Hui,Jiang Chuanxiu,Wu Xianxin,Li Chuanyun,Yue Shengli,Yang Rongsheng,Zhang Hong,Zhang Jianqi,Liu Xinfeng,Zhang Yuan,Zhou Huiqiong
Stability has been a long-standing concern for solution-processed perovskite photovoltaics and their practical applications. However, stable perovskite materials for photovoltaic remain insufficient to date. Here we demonstrate a series of ultrastable Dion−Jacobson (DJ) perovskites (1,4-cyclohexanedimethanammonium)(methylammonium) n −1 Pb n I 3 n +1 ( n ≥ 1) for photovoltaic applications. The scalable technology by blade-coated solar cells for the designed DJ perovskites (nominal n = 5) achieves a maximum stabilized power conversion efficiency (PCE) of 19.11% under an environmental atmosphere. Un-encapsulated cells by blade-coated technology retain 92% of their initial efficiencies for over 4000 hours under ~90% relative humidity (RH) aging conditions. More importantly, these cells also exhibit remarkable thermal (85 °C) and operational stability, which shows negligible efficiency loss after exceeding 5000-hour heat treatment or after operation at maximum power point (MPP) exceeding 6000 hours at 45 °C under a 100 mW cm −2 continuous light illumination.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
DOI
PubMed
高影响因子
Cell Reports Physical Science
·
2020
·
IF 0
Zijian Peng,Qi Wei,Hao Chen,Yawen Liu,Fei Wang,Xianyuan Jiang,Weiyan Liu,Wenjia Zhou,Shengjie Ling,Zhijun Ning
Summary Dissociation of organic molecules is one critical factor leading to degradation of perovskite solar cells. The much-improved thermal stability of formamidinium (FA) can significantly reduce molecular dissociation; however, FA-based perovskite suffers from high defect density, which affects efficiency and long-term stability. In this work, based on a precise ion-exchange reaction at the grain surface, we fabricate a Cs 0.15 FA 0.85 PbI 3 /Cs x FA 1-x PbI 3 heterostructure with a Cs-rich Cs x FA 1-x PbI 3 quasi-shell structure. The Cs-rich inorganic structure on the perovskite surface increases defect formation energy and reduces defect density, leading to a power conversion efficiency of 20.7%. The encapsulated device maintains 95% of its initial efficiency after 1,000 h of continuous operation, corresponding to a calculated lifetime approaching 2 years. The device can operate at 60°C for 250 h and at 85°C for over 3,000 min, which is one of the best operational stabilities for Cs x FA 1-x PbI 3 -based devices.
研究领域:
材料科学
·
太阳能
·
纳米技术
✓ 已验证
DOI
危险品化学品经营许可证（带存储）