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Alcohol-dispersed polymer complex as an effective and durable interface modifier for n-i-p perovskite solar cells

Journal of Energy Chemistry 2024年第6期93卷 243-252,I0007页

作者： Chang Shi Jiangling Li Shuping Xiao Ziyi Wang Wuchen Xiang Rui Wu Yang Liu Yinhua Zhou Weijun Ke guojia Fang Pingli Qin Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205HubeiChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074HubeiChina School of Physics and Technology Key Laboratory of Artificial Micro-and Nano-structures of the Ministry of Education and School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina

Abundant interfacial defects remain a significant challenge that hampers both the efficiency and stability of perovskite solar cells(PSCs).Herein,an alcohol-dispersed conducting polymer complex,denoted as PEDOT:F(Poly(3,4-ethylene dioxythiophene):Perfluorinated sulfonic acid ionomers),is introduced into the interface between perovskite and hole transporting layer in regular-structured ***:F serves as a multi-functional interface layer(filling grain boundaries and covering perovskite's grain-surface)to achieve a robust interaction with organic groups within perovskites,which could induce a structural transformation of PEDOT to increase its conductivity for the efficient ***,the strong interaction between PEDOT and perovskites could promote an effective coupling of undercoordinated Pb~(2+)ions with the lone electron pairs near O&S atoms in PEDOT molecules,thereby enhancing defect ***,PEDOT:F with inherent hydrophobic properties prevents effectively moisture invasion into perovskites for the improved long-term stability of the ***,the PEDOT:F-based PSCs achieved a champion efficiency of 24.81%,and maintained ca.92%of their initial efficiency after 7680 h of storage in a dry air environment,accompanied by the enhanced photothermal stability.

关键词： Alcohol-dispersed conducting polymer complex Interface passivation Grain boundaries Device stability Perovskite solar cells

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Tail states suppression via surface-modification of wide-bandgap perovskites for high-efficiency all-perovskite photovoltaic tandems

Tail states suppression via surface-modification of wide-ban...

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第十一届新型太阳能材料科学与技术学术研讨会

作者： guojia Fang Xuzhi Hu School of Electronic and Electrical Engineering Wuhan Textile University

As an essential light-absorbing material in perovskite-based tandem solar cells,widebandgap（WBG） perovskite has garnered extensive ***,due to severe non-radiative recombination from tail states,as well as photoinduced phase segregation and unoptimized charge transfer,WBG perovskite solar cells（PSCs） typically display significant open-circuit voltage（VOC） loss and low fill factor（FF）.In this work,we report to modify the 1.68 eV WBG perovskite film upon optimized surface passivation with 1,3-propanediammonium iodide（PDAI）.Time-resolved microwave conductivity measurement is employed to analyze the tail states,mobilities of charge carriers and the rate constants of recombination in perovskite *** results indicate that the optimized surface modification strategy not only enhances film quality,boosts carrier transport,but also suppresses tail states and therefore diminishes non-radiative recombination,consequently elevating the VOC and FF of the ***,the PDAI-assisted WBG PSCs deliver an optimal efficiency of 21.48 %,accompanied by a V of 1.243 ***,the integration of a narrow-bandgap tin–lead PSC with a semi-transparent WBG PSC results in a four-terminal perovskite/perovskite tandem solar cell,showcasing an efficiency surpassing 28 %.Our research offers a practical approach for producing efficient WBG PSCs and tandem solar cells.

关键词： Perovskite solar cell Tandem Wide bandgap Charge carrier transport

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Tailoring Perovskite Surface Potential and Chelation Advances Efficient Solar Cells

Tailoring Perovskite Surface Potential and Chelation Advance...

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第十一届新型太阳能材料科学与技术学术研讨会

作者： Haibing Wang guojia Fang Wenlong Shao School of Electronic and Electrical Engineering Wuhan Textile University

Modifying perovskite surface using various organic ammonium halide cations has proven to be an effective approach for enhancing the overall performance of perovskite solar ***,the impact of the structural symmetry of these ammonium halide cations on perovskite interface termination has remained ***,this work investigates the influence of symmetry on the performance of the devices,using molecules based on symmetrical bis（2-chloroethyl）ammonium cation(B（CE）A) and asymmetrical 2-chloroethylammonium cation（CEA） as interface layers between the perovskite and hole transport *** results reveal that the symmetrical B（CE）A cations lead to a more homogeneous surface potential and more comprehensive chelation with uncoordinated Pb compared to the asymmetrical cations,resulting in a more favorable energy band alignment and strengthened defect *** strategy,leveraging the spatial geometrical symmetry of the interface cations,promotes hole carrier extraction between functional layers and reduces nonradiative recombination on the perovskite ***,perovskite solar cells processed with the symmetrical B（CE）A cations achieve a power conversion efficiency（PCE） of 25.60% and retain ≈91% of their initial PCE after 500 h of maximum power point operation.

关键词： Perovskite solar cells defects passivation symmetrical molecules

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Considerable impact of major air pollutants on hypertension in Guizhou province,southwest China

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Chinese Medical Journal 2024年第4期137卷 496-498页

作者： Ping Yuan guojia Qi Xiu Dai Xiangyuan Chu Zhijun Liu Guoqin Liu Xiuquan Shi Department of Epidemiology and Health Statistics School of Public HealthZunyi Medical UniversityZunyiGuizhou 563006China School of Management Zunyi Medical UniversityZunyiGuizhou 563006China Center for Injury Research and Policy&Center for Pediatric Trauma Research The Research Institute at Nationwide Children’s HospitalThe Ohio State University College of MedicineColumbusOH 43210USA

To the Editor:Air pollution can lead to respiratory and cardiovascular diseases(CVDs),and its impact on human health is very *** particles less than 0.1µm can pass through the blood brain barrier,reach the brain,and enter the central nervous system,causing physiological and pathological changes.A study shows that long-term exposure to fine particulate matter(PM_(2.5))will increase the risk of CVDs among Chinese residents.^([1])Another study found that a short time exposure to low concentrations of air pollutants may also lead to the onset of acute coronary syndrome within one hour.^([2])A meta-analysis based on seven databases showed that environmental air pollution was positively correlated with elevated blood pressure and hypertension.^([3])Mounting evidence indicates that air pollution can cause cardiovascular and cerebrovascular diseases and affect human health furtherly.

关键词： pollution impact Guizhou

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双模态超声深度学习预测模型诊断乳腺癌的应用

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中国临床研究 2024年第3期37卷 365-369,374页

作者：李晓洁赵国家任金河锦州医科大学临沂市人民医院研究生培养基地山东临沂276000 临沂市人民医院超声医学科山东临沂276000

目的采用基于乳腺超声灰阶图像和弹性图像的深度学习(DL)技术构建一个预测模型,并探讨该模型在乳腺病灶良恶性鉴别中的诊断效能。方法回顾性收集2020年5月至2021年4月于临沂市人民医院乳腺外科接受手术治疗患者的乳腺病灶共1 000个,... 详细信息

目的采用基于乳腺超声灰阶图像和弹性图像的深度学习(DL)技术构建一个预测模型,并探讨该模型在乳腺病灶良恶性鉴别中的诊断效能。方法回顾性收集2020年5月至2021年4月于临沂市人民医院乳腺外科接受手术治疗患者的乳腺病灶共1 000个,包括超声图像及相关临床病理资料,选择每个病灶最大切面的超声灰阶图像及弹性图像,按照7∶2∶1的比例随机将病灶分为训练集、验证集和测试集;应用训练集和验证集的病灶图像基于神经网络构建预测模型,应用测试集病灶图像检测模型的诊断效能;邀请四位超声医生分别阅读测试集病灶的超声图像,比较模型与不同年资医生之间的诊断效能。结果 DL预测模型对乳腺病灶诊断的受试者工作特征曲线(ROC)曲线下面积(AUC)值(0.907)高于所有医生,差异有统计学意义(P0.05)。结论基于双模态超声DL预测模型可以显著提高医生对乳腺病灶良恶性鉴别的诊断效能。

关键词：深度学习神经网络乳腺癌超声灰阶图像弹性成像预测模型人工智能

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Tailoring component incorporation for homogenized perovskite solar cells

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Science Bulletin 2024年第16期69卷 2555-2564页

作者： Wenhan Yang Junmin Xia Yuexin Lin Hao Gu Fengqiang Ma Yumin Ren Fenqi Du Dejian Yu Jinfeng Liao Yiwang Chen guojia Fang Shengchun Yang Chao Liang MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao 999078China Shandong Zhixin Intelligent Equipment Co. LTDJinan 250101China School of Chemistry Xi’an Jiaotong UniversityXi’an 710049China National Engineering Research Center for Carbohydrate Synthesis Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationJiangxi Normal UniversityNanchang 330022China Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China

Deep-level traps at the buried interface of perovskite and energy mismatch problems between the perovskite layer and heterogeneous interfaces restrict the development of ideal homogenized films and efficient perovskite solar cells(PSCs)using the one-step spin-coating ***,we strategically employed sparingly soluble germanium iodide as a homogenized bulk in-situ reconstruction inducing material preferentially aggregated at the perovskite buried interface with gradient doping,markedly reducing deep-level traps and withstanding local lattice strain,while minimizing non-radiative recombination losses and enhancing the charge carrier lifetime over 9μ***,this gradient doping assisted in modifying the band diagram at the buried interface into a desirable flattened alignment,substantially mitigating the energy loss of charge carriers within perovskite films and improving the carrier extraction *** a result,the optimized device achieved a champion power conversion efficiency of 25.24% with a fill factor of up to 84.65%,and the unencapsulated device also demonstrated excellent light stability and humidity *** work provides a straightforward and reliable homogenization strategy of perovskite components for obtaining efficient and stable PSCs.

关键词： Homogenized perovskite films Lattice strain relaxation Deep-level traps Carrier extraction equilibrium Perovskite solar cells

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钽掺杂对多层Ta-DLC薄膜摩擦及腐蚀行为的影响

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表面技术 2024年第8期53卷 63-73页

作者：李超孙刚马国佳吴俊升张博威张昊泽北京科技大学新材料技术研究院北京100083 中国航发动力股份有限公司西安710021 中国航空制造技术研究院高能束流加工技术重点实验室北京100024 中国航空制造技术研究院先进表面工程技术航空重点实验室北京100024

目的解决316L不锈钢在苛刻海洋环境中易磨损、易腐蚀的问题。方法采用中频磁控溅射技术在316L不锈钢上沉积了Ta/TaN/TaCN/Ta-DLC薄膜。通过扫描电子显微镜、拉曼光谱、X射线光电子能谱、X射线衍射、纳米压痕、往复摩擦磨损试验和电化学... 详细信息

目的解决316L不锈钢在苛刻海洋环境中易磨损、易腐蚀的问题。方法采用中频磁控溅射技术在316L不锈钢上沉积了Ta/TaN/TaCN/Ta-DLC薄膜。通过扫描电子显微镜、拉曼光谱、X射线光电子能谱、X射线衍射、纳米压痕、往复摩擦磨损试验和电化学测试等手段,重点研究了DLC膜层中Ta元素掺杂含量对薄膜结构、组成成分、力学性能、摩擦学性能和耐腐蚀性能的影响规律。结果随着Ta元素含量(原子数分数)从2.04%增到4.16%,薄膜中的sp^(3)键含量呈现先升高后降低的趋势,当Ta原子数分数为3.60%时,薄膜中sp3键含量最高,且薄膜的硬度及弹性模量达到最大,分别为7.01 GPa和157.87 GPa。随着Ta元素含量的增加,薄膜的平均摩擦因数逐渐减小,在4.16%(原子数分数)时达到最小0.21。Ta元素含量对薄膜的结合力影响较小,且所有薄膜结合力总体在10 N左右。当Ta原子数分数为3.60%时,薄膜的腐蚀电流密度及钝化电流密度最小,分别为0.006μA/cm^(2)和0.63μA/cm^(2),比其他薄膜的低1~2个数量级,并且薄膜电阻及电荷转移电阻最大,展现出最为优异的耐腐蚀性能。结论Ta元素的掺杂提高了薄膜的耐摩擦性能,且适当的Ta元素掺杂能够提高Ta/TaN/TaCN/Ta-DLC薄膜的耐磨耐蚀性能。

关键词： DLC薄膜磁控溅射腐蚀摩擦磨损元素掺杂

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Effects of Microbial Fertilizers on Soil Improvement and Wheat Growth Characteristics in Saline-alkali Land

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Agricultural Biotechnology 2024年第4期13卷 76-81页

作者： Gen SONG Ziru LI Baohai ZHANG Zhenhua JIA Jirong CUI Dingxin GUO Lili HAN Yanhong WU Jianlong FENG Yan GAO Mingying LIU Chunguang SONG guojia JI Changsong WANG Zhiwei ZHANG Qinhuangdao Hemiao Biotechnology Co. Ltd.Qinhuangdao 066000China Hebei Normal University of Science&Technology Qinhuangdao 066000China Institute of Biology Hebei Academy of SciencesShijiazhuang 050081China Changli Bureau of Agriculture and Rural Affairs Qinhuangdao 066000China Huanghua Win-win Agricultural Materials Co. LTD.Huanghua 061100China

[Objectives]This study was conducted to further enrich the research on saline-alkali land improvement,and explore the effects of biological bacterial fertilizers containing Bacillus subtilis and Bacillus velezensis HM-3 in saline-alkali land improvement and crop growth promotion.[Methods]Wheat was planted in saline-alkali land in Huanghua City,Hebei Province,and a mixed application experiment was carried out using biological agents from Hemiao Biotechnology Co.,Ltd.[Results]Compared with the field of control check(CK),water-soluble salts and pH value in the experimental fields decreased,and living bacteria count in the soil ***,the economic characters of wheat in the experimental fields showed excellent performance,with yields increasing by 39.09%and 27.49%compared with the *** could be seen that the application of biological bacterial fertilizers achieved obvious effects of improving saline-alkali soil and increasing wheat yield.[Conclusions]In this study,the effects of biological bacterial fertilizers on saline-alkali land and wheat growth characters were clarified,providing some technical support and theoretical guidance for wheat planting in Huanghua saline-alkali land.

关键词： Saline-alkali land Soil improvement Wheat Yield

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简便枕大池二次注血法建立脑血管痉挛模型的效果分析

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中华神经医学杂志 2024年第4期23卷 387-391页

作者：阎泉文渊丰程鹏房泰鞍杜郭佳新疆医科大学第一附属医院神经外科乌鲁木齐830000

目的探讨简便枕大池二次注血法建立脑血管痉挛模型的效果。方法25只SD大鼠按随机数字表法分为假手术组、蛛网膜下腔出血(SAH)后1 d组、SAH后3 d组、SAH后5 d组、SAH后7 d组,每组5只。后4组大鼠采用简便枕大池二次注血法,即穿刺尾动脉获... 详细信息

目的探讨简便枕大池二次注血法建立脑血管痉挛模型的效果。方法25只SD大鼠按随机数字表法分为假手术组、蛛网膜下腔出血(SAH)后1 d组、SAH后3 d组、SAH后5 d组、SAH后7 d组,每组5只。后4组大鼠采用简便枕大池二次注血法,即穿刺尾动脉获取自体血0.2 mL后直接穿刺寰枕膜注射自体血,48 h后重复上述操作建立脑血管痉挛模型。采用改良神经功能缺损程度评分评估各组大鼠神经功能缺损程度,采用HE染色检测各组大鼠基底动脉(BA)的直径和横截面积。比较各组大鼠造模前体质量、2次注血前体质量差、神经功能缺损程度评分、BA直径和横截面积的差异。结果(1)5组大鼠造模前体质量的差异无统计学意义(P>0.05)。与假手术组比较,SAH后1 d组、SAH后3 d组、SAH后5 d组、SAH后7 d组大鼠2次注血时体质量差较大,差异有统计学意义(P<0.05)。(2)与假手术组比较,SAH后1 d组、SAH后3 d组、SAH后5 d组、SAH后7 d组大鼠神经功能缺损程度评分较高,差异均有统计学意义(P<0.05)。(3)与假手术组比较,SAH后3 d组、SAH后7 d组大鼠BA直径较短,且SAH后7 d组大鼠BA直径短于SAH后1 d组、SAH后5 d组,差异均有统计学意义(P<0.05)。与假手术组比较,SAH后1 d组、SAH后3 d组、SAH后5 d组、SAH后7 d组大鼠BA横截面积均较小,且SAH后7 d组大鼠BA横截面积小于SAH后1 d组、SAH后3 d组、SAH后5 d组,差异均有统计学意义(P<0.05)。结论采用简便枕大池二次注血法建立SAH后脑血管痉挛模型,具有操作简化、造模时间短、微创等优点,且以注血后7 d最合适。

关键词：蛛网膜下腔出血脑血管痉挛枕大池二次注血法动物模型

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结合深度图和红通道最小强度先验的水下图像复原

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计算机辅助设计与图形学学报 2024年第6期36卷 904-914页

作者：李月梅侯国家王国栋潘振宽黄宝香青岛大学计算机科学技术学院青岛266071

针对水下图像雾化、模糊等问题,提出结合深度图和红通道最小强度先验的水下图像复原变分方法.基于完整的水下成像模型,首先设计了一种自适应加权融合亮度、梯度及色差等信息的场景深度估计方法,计算3个通道的透射率;然后根据前向散射分... 详细信息

针对水下图像雾化、模糊等问题,提出结合深度图和红通道最小强度先验的水下图像复原变分方法.基于完整的水下成像模型,首先设计了一种自适应加权融合亮度、梯度及色差等信息的场景深度估计方法,计算3个通道的透射率;然后根据前向散射分量建立变分模型的数据项,对拟复原图像引入红通道最小强度先验作为变分能量方程规则项,借助图像金字塔,采用粗尺度到细尺度逐步优化策略进行模糊核估计;最后利用交替方向乘子法迭代求解,解决变分模型带来的非光滑优化问题.在UIEB数据集上进行了定性和定量实验,通过UCIQE,FADE和CPBD客观评价指标对比,结果表明,所提方法的评价结果比经典方法平均分别提升15%以上,复原后的图像具有更高的清晰度和更丰富的边缘信息.

关键词：完整水下成像模型深度图红通道最小强度先验变分模型交替方向乘子法

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