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Journal of Energy Chemistry 2023年第11期86卷 9-15,I0001页

作者： Qi Cao Yixin Zhang xingyu pu Junsong Zhao Tong Wang Kui Zhang Hui Chen Xilai He Jiabao Yang Cheng Zhang Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072ShaanxiChina School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243032AnhuiChina

Interfacial imperfections between the perovskite layer and the electron transport layer(ETL)in perovskite solar cells(PSCs)can lead to performance loss and negatively influence long-term operational ***,we introduce an interface engineering method to modify the interface between perovskite and ETL by using multifunctional carbon dots(CDs).C=O in the CDs can chelate with the uncoordinated Pb2+in the perovskite material,inhibit interfacial recombination,and enhance the performance and stability of *** addition,–OH in CDs forms hydrogen bonds with I-and organic cation in perovskite,inhibiting light-induced I2release and organic cation volatilization,causing irreversible degradation of perovskite films,thereby enhancing the long-term operational stability of ***,we achieve the champion inverted device with an efficiency of 24.02%.The CDs-treated PSCs exhibit high operational stability,and the maximum power point tracking only attenuates by 12.5%after 1000 *** modification engineering supported by multifunctional quantum dots can accelerate the road to stable PSCs.

关键词： Interfacial engineering Carbon dots Non-radiative recombination

From macro to microarchitecture: reviews and trends of SRAM-based compute-in-memory circuits

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Science China(Information Sciences) 2023年第10期66卷 42-60页

作者： Zhaoyang ZHANG Jinwu CHEN Xi CHEN An GUO Bo WANG Tianzhu XIONG Yuyao KONG xingyu pu Shengnan HE Xin SI Jun YANG National Application Specific Integrated Circuit Center Southeast University

The rapid growth of CMOS logic circuits has surpassed the advancements in memory access,leading to significant “memory wall” bottlenecks, particularly in artificial intelligence applications. To address this challenge, compute-in-memory(CIM) has emerged as a promising approach to enhance the performance,area efficiency, and energy efficiency of computing systems. By enabling memory cells to perform parallel computations, CIM improves data reuse and minimizes data movement between the memory and the processor. This study conducts a comprehensive review of various domains of SRAM-based CIM macros and their associated computing paradigms. Additionally, it presents a survey of recent SRAM-CIM macros, with a specific focus on the key challenges and design tradeoffs involved. Furthermore, this research identifies potential future trends in SRAM-CIM macro-level design, including hybrid computing, precision enhancement, and operator reconfiguration. These trends aim to resolve the tradeoff between computational accuracy, energy efficiency, and support for diverse operators within the SRAM-CIM framework. At the microarchitecture level, two possible solutions for tradeoffs are proposed: chiplet integration and sparsity optimization. Finally,research perspectives are proposed for future development.

关键词： artificial intelligence (AI) compute-in-memory (CIM) static random access memory (SRAM)

Gadolinium-incorporated CsPbI_(2)Br for boosting efficiency and long-term stability of all-inorganic perovskite solar cells

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Journal of Energy Chemistry 2022年第7期31卷 9-17,I0001页

作者： xingyu pu Jiabao Yang Tong Wang Shuaici Cheng Qi Cao Junsong Zhao Hui Chen Yixin Zhang Tingting Xu Ilhom Tojiboyev Hadi Salari Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXian710072.ShaanxiChina Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710129ShaanxiChina School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129ShaanxiChina Institute Ion-Plasma and Laser Technologies Uzbekistan Academy of Sciences100125Durmon yuli 33TashkentUzbekistan Faculty of Physical Chemistry Shiraz UniversityShiraz 71345Iran

All-inorganic CsPbI_(2)Br perovskite solar cells(PSCs)have received extensive research interests ***,their low efficiency and poor long-term stability are still obstacles for further commercial ***,we demonstrate that high efficiency and exceptional long-term stability are realized by incorporating gadolinium(III)chloride(GdCl_(3))into the CsPbI_(2)Br perovskite *** incorporation of GdCl_(3) enhances the Goldschmidt tolerance factor of CsPbI_(2)Br perovskite,yielding a dense perovskite film with small grains,thus the a-phase CsPbI_(2)Br is remarkably ***,it is found that the GdCl_(3)-incorporated perovskite film achieves suppressed charge recombination and appropriate energy level alignment compared with the pristine CsPbI_(2)Br *** noticeable increment in efficiency from14.01%(control PSC)to 16.24%is achieved for GdCl_(3)-incorporated ***,the nonencapsulated GdCl_(3)-incorporated PSC exhibits excellent environmental and thermal stability,remaining over 91%or90%of the original efficiency after 1200 h aging at 40%relative humidity or 480 h heating at 85℃ in nitrogen glove box *** encapsulated GdCl_(3)-incorporated PSC presents an improved operational stability with over 88%of initial efficiency under maximum power point(MPP)tracking at 45℃ for1000 *** work presents an effective ion-incorporation approach for boosting efficiency and long-term stability of all-inorganic PSCs.

关键词： All-inorganic perovskite CsPbI_(2)Br Gadolinium incorporation Power conversion efficiency Long-term stability

Effective additive for enhancing the performance of Sb_(2)S_(3) planar thin film solar cells

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Journal of Materiomics 2021年第5期7卷 1074-1082页

作者： Hui Zhou Jian Han xingyu pu Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an710072China Northwestern Polytechnical University-Queen Marry University of London(NPU-QMUL)Joint Research Institute of Advanced Materials and Structures(JRI-AMAS)127 West Youyi RoadXi’anXi’an710072China

Sb_(2)S_(3) is a promising photovoltaic absorber with appropriate bandgap,excellent light absorption coefficient and great ***,the power conversion efficiency(PCE)of Sb_(2)S_(3) planar thin film solar cells is unsatisfactory for further commercial application due to low crystallinity and high resistivity of Sb_(2)S_(3) ***,we introduce an additive of 4-Chloro-3-nitrobenzenesulfonyl Chloride(CSCl)to alleviate these *** CSCl molecular contains two terminal Cl with lone pair electrons,which have the interaction with Sb ***,the Sb_(2)S_(3) film with enhanced crystallization and low trap states has been obtained and the resistivity is also ***,CSCl additive raises the Fermi level of the Sb_(2)S_(3) film,thereby enhancing the transport of electron from Sb_(2)S_(3) to TiO_(2).Consequently,the optimal PCE of Sb_(2)S_(3) solar cells is raised from 4.20%(control device)to 5.84%.Our research demonstrates a novel additive to enhance the photoelectric performance of Sb_(2)S_(3) solar cells.

关键词： Sb_(2)S_(3) Solar cells Additive engineering Carrier transport High performance

Multidentate anchoring through additive engineering for highly efficient Sb_(2)S_(3)planar thin film solar cells

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Journal of Materials Science & Technology 2021年第30期89卷 36-44页

作者： Jian Han xingyu pu Hui Zhou Qi Cao Shuangjie Wang Jiabao Yang Junsong Zhao Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Northwestern Polytechnical University-Queen Marry University of London(NPU-QMUL)Joint Research Institute of Advanced Materials and Structures(JRI-AMAS)Xi’an 710072China

Sb_(2)S_(3)is a promising candidate for the flexible solar cells or the top subcells in tandem solar cells due to its wide-bandgap,less toxic,acceptable cost and progressive power conversion efficiency(PCE).However,the poor quality and high trap states of Sb_(2)S_(3)films limit the device performance further ***,we adopt a multidentate ionic liquid,tetramethylammonium hexafluorophosphate([TMA][PF_(6)])as a novel additive to address this *** octahedral[PF_(6)]~-contains six different oriented fluorine atoms with the lone pair electrons,which could coordinate with Sb atoms due to the multidentate ***,the high-quality Sb_(2)S_(3)film with low trap states has been ***,the Fermi level of the Sb_(2)S_(3)film has been upshifted,thereby showing an effective charge *** a result,all photovoltaic parameters of the optimized Sb_(2)S_(3)devices are obviously enhanced,boosting the final PCE from 4.43(control device)to 6.83%.Our study about the multidentate anchoring is manifested to be an effective method to enhance the Sb_(2)S_(3)device performance.

关键词： Sb_(2)S_(3) Solar cells Additive engineering Multidentate anchoring Passivation

Tailoring the mercaptan ligands for high performance inverted perovskite solar cells with efficiency exceeding 21%

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Journal of Energy Chemistry 2021年第9期30卷 169-177页

作者： Shuangjie Wang Ziwei He Jiabao Yang Tongtong Li xingyu pu Jian Han Qi Cao Bingyu Gao Xuanhua Li Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Interface passivation engineering has been recognized as an effective way to simultaneously contribute to the optoelectronic characteristic and stability of perovskite solar cells(PSCs). Herein, a p-conjugated dual-ligand 1,4-phenylmercaptan(PHMT) is explored to rationally tailor the surface of perovskite *** experimental and theoretical results show that the PHMT presents planar structure and obvious electron delocalization characteristics, which allow it to anchor on the surface of perovskite with a certain orientation, thereby promoting the transport of interface charge. Moreover, the two sulfhydryl groups in PHMT reduce the trap density of the perovskite film by passivating under-coordinated lead ***, the PHMT-modified inverted device based on MAPbI_(3)(MA: methylammonium) achieves enhanced efficiency from 18.11%(control) to 21.11%, along with the ambient stability up to 3500 *** being placed at 85 °C for 500 h or illuminated for 600 h, the modified device remains over 89%or 86% of initial efficiency. This discovery opens a new window for the choice of passivators to improve the performance of PSCs.

关键词： Perovskite solar cells Stability Dual-ligand Passivation Mercaptan

Surface modification with ionic liquid for efficient CsPbI2Br perovskite solar cells

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Journal of Materiomics 2021年第5期7卷 1039-1048页

作者： xingyu pu Jian Han Shuangjie Wang Hui Zhou Qi Cao Jiabao Yang Ziwei He Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXián710072China Northwestern Polytechnical University-Queen Marry University of London(NPU-QMUL)Joint Research Institute of Advanced Materials and Structures(JRI-AMAS)Xián710072China

The presence of numerous trap states on the perovskite surface severely affects the performance of inorganic CsPbI_(2)Br perovskite solar *** modification has been proven to be an effective strategy to passivate the surface trap states of CsPbI_(2)Br ***,most modifiers behave high volatility and insulation,not enough to further develop the CsPbI_(2)Br solar ***,an ionic liquid of 1-viny-3-propionate ethyl imidazolium chloride([PEVIM]Cl)is applied to modify the CsPbI_(2)Br film surface,yielding a compact film with enhanced *** surface trap states of CsPbI_(2)Br film are effectively passivated via the interaction between carbonyl group of[PEVIM]Cl and uncoordinated metal cations of CsPbI_(2)Br perovskite,leading to charge recombination suppression and charge transport ***,the power conversion efficiency(PCE)of[PEVIM]Cl modified CsPbI_(2)Br device is obviously enhanced from 12.49% to 14.19% with an improved open-circuit voltage of 1.160 ***,the non-encapsulated device presents excellent thermal stability,still maintaining 91%PCE when heated at 85℃ in nitrogen atmosphere for 360 ***,the non-encapsulated device degrades only 11% PCE after stored at 50% relative humidity for 960 *** simple and efficient approach provides a promising direction to fabricate high-efficiency and stable inorganic perovskite devices.

关键词： Inorganic perovskites CsPbI_(2)Br Ionic liquid Surface modification High efficiency

溴化锂制冷蒸发器中钛椭圆管外降膜流动及传热特性

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化学工业与工程 2022年第1期39卷 97-105页

作者：彭德其蒲幸禹俞天兰李广吴淑英湘潭大学机械工程学院湖南湘潭411105 湖南工业大学机械工程学院湖南株洲412007 中车株洲电机有限公司湖南株洲412007

为了提高溴化锂中央空调系统中制冷蒸发器的耐腐蚀性,采用钛管代替铜管,并提出椭圆管代替圆管方式提高钛管外制冷剂蒸发效率,数值模拟研究椭圆系数E对椭圆钛管外制冷剂流动过程、液膜厚度分布及传热系数影响规律。结果表明:在椭圆系数E=... 详细信息

为了提高溴化锂中央空调系统中制冷蒸发器的耐腐蚀性,采用钛管代替铜管,并提出椭圆管代替圆管方式提高钛管外制冷剂蒸发效率,数值模拟研究椭圆系数E对椭圆钛管外制冷剂流动过程、液膜厚度分布及传热系数影响规律。结果表明:在椭圆系数E=1.0~1.7范围内,随着E增大,管外液膜平均厚度减薄、液膜速度增大、干壁面积减少、传热边界层也更薄,传热效果显著提升;相比于圆管,E=1.7的椭圆管外液膜平均厚度减少26.21%,平均液膜速度增大20.81%,干壁面积减少86.00%,管外平均传热系数提高8.67%;E=1.8~2.0范围内,随着E增大,管外液膜平均厚度增大、液膜干壁面积增大,均不利于强化传热。

关键词：溴化锂制冷降膜蒸发汽液两相流数值模拟椭圆管

民办高校学生禁毒防艾活动开展现状分析--以四川工商学院为例

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四川工商学院学术新视野 2022年第2期7卷 64-66,73页

作者：蒲星宇李玥四川工商学院教育学院四川眉山620000 四川工商学院校团委四川眉山620000

通过由共青团四川工商学院委员会组织进行的禁毒防艾相关活动开展情况的调查,文章从学生关于禁毒防艾的认识了解程度、防范意识及活动参与的程度等多方面进行分析,结合学校实际情况,探讨出更适合于四川工商学院开展禁毒防艾教育的主题活... 详细信息

通过由共青团四川工商学院委员会组织进行的禁毒防艾相关活动开展情况的调查,文章从学生关于禁毒防艾的认识了解程度、防范意识及活动参与的程度等多方面进行分析,结合学校实际情况,探讨出更适合于四川工商学院开展禁毒防艾教育的主题活动,不断培养和增强大学生群体的社会责任感和禁毒防艾意识。

关键词：民办高校禁毒防艾健康教育

超临界流体水平流动换热中浮升力效应分析与判据评价

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动力工程学报 2021年第6期41卷 474-480页

作者：蒲星宇李舟航昆明理工大学冶金节能减排教育部工程研究中心昆明650093 昆明理工大学冶金化工节能环保技术国家地方联合工程研究中心昆明650093

为了准确判断浮升力对换热模型精度的影响,收集整理了多种超临界流体(水、CO_(2)和R125等)水平流动换热的实验数据,对不同浮升力影响判断准则进行了评价,并提出了对浮升力判别式展开修正应遵循的原则。结果表明:目前被广泛认为适应性最... 详细信息

为了准确判断浮升力对换热模型精度的影响,收集整理了多种超临界流体(水、CO_(2)和R125等)水平流动换热的实验数据,对不同浮升力影响判断准则进行了评价,并提出了对浮升力判别式展开修正应遵循的原则。结果表明:目前被广泛认为适应性最好的判别式Gr_(q)/Gr_(th)仍存在拟气区表现效果不佳、拟液区与拟气区数值无一致性、其峰值对应的主流焓值与壁温差峰值对应的主流焓值无相关性等局限性;壁温差峰值处流体焓值也是衡量管内浮升力影响程度的重要因素。

关键词：超临界压力流体水平流动传热浮升力效应判据