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Balancing Energy-Level Difference for Efficient n-i-p Perovskite Solar Cells with Cu Electrode

Energy Material Advances 2022年第1期2022卷 157-164页

作者： Ziqi Xu Nengxu Li xiuxiu niu Huifen Liu Guilin Liu Qi Chen Huanping Zhou Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationBIC-ESATSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China China Automotive Technology and Research Center Co. Ltd.TianjinChina Experimental Centre for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China School of Science Jiangnan UniversityWuxiJiangsu 214122China

Developing low cost and stable metal electrode is crucial for mass production of perovskite solar cells(PSCs).As an earthabundant element,Cu becomes an alternative candidate to replace noble metal electrodes such as Au and Ag,due to its comparable physiochemical properties with simultaneously good stability and low ***,the undesirable band alignment associated with the device architecture impedes the exploration of efficient Cu-based n-i-p ***,we demonstrated the ability of tuning the Fermi level(E_(F))of hole transport layer(HTL)to reduce the energy level difference(Schottky barrier)between HTLs and ***,we identified that the balance of energy level difference between HTL and adjacent layers(including perovskite and Cu)is crucial to efficient carrier transportation and photovoltaic performance improvement in the *** the optimized condition,we achieve a device power conversion efficiency(PCE)of 20.10%,which is the highest on the planar n-i-p PSCs with Cu ***,the Cu-based PSCs can maintain 92%of their initial efficiency after 1000 h storage,which is comparable with Au-based *** present work not only extends the understanding on the band alignment of neighboring semiconductor functional layer in the device architecture to improve the resulting performance but also suggests great potential of Cu electrode for application in PSCs community.

关键词： perovskite alignment electrode

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Vacancy healing for stable perovskite solar cells via bifunctional potassium tartrate

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Journal of Energy Chemistry 2024年第1期88卷 64-70,I0002页

作者： Jing Dou Yue Ma xiuxiu niu Wentao Zhou Xueyuan Wei Jie Dou Zhenhua Cui Qizhen Song Tinglu Song Huanping Zhou Cheng Zhu Yang Bai Qi Chen Experimental Centre for Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationBIC-ESATSchool of Materials Science and EngineeringPeking UniversityBeijing 100871China

Perovskite solar cell has gained widespread attention as a promising technology for renewable ***, their commercial viability has been hampered by their long-term stability and potential Pb leakage. Herein, we demonstrate a bifunctional passivator of the potassium tartrate(PT) to address both challenges. PT minimizes the Pb leakage in perovskites and also heals cationic vacancy defects, resulting in improved device performance and stability. Benefiting from PT modification, the power conversion efficiency(PCE) is improved to 23.26% and the Pb leakage in unencapsulated films is significantly reduced to 9.79 ppm. Furthermore, the corresponding device exhibits no significant decay in PCE after tracking at the maximum power point(MPP) for 2000 h under illumination(LED source, 100 mW cm^(-2)).

关键词： Perovskite Potassium tartrate Lead leakage Long-term stability

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Improved interfacial adhesion for stable flexible inverted perovskite solar cells

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Journal of Energy Chemistry 2023年第1期76卷 288-294,I0008页

作者： Jie Dou Qizhen Song Yue Ma Hao Wang Guizhou Yuan Xueyuan Wei xiuxiu niu Sai Ma Xiaoyan Yang Jing Dou Shaocheng Liu Huanping Zhou Cheng Zhu Yihua Chen Yujing Li Yang Bai Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low-dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Peking UniversityBeijing 100871China

Flexible perovskite solar cells have attracted widespread attention due to their unique advantages in lightweight,high flexibility,and easy deformation,which are suitable for portable ***,the inverted(p-i-n)structured devices suffer from poor stability largely due to the low adhesion at the brittle interface(the hole transport layer/perovskite).Herein,zeolitic imidazolate framework-67(ZIF-67)is applied to inverted structured cells to optimize the interface and prolong the device *** a result,the flexible devices based on ZIF-67 obtain the champion power conversion efficiency of 20.16%.Over 1000 h under continuous light irradiation,the device retains 96%and 80%of its original efficiency without and with bias,***,devices show mechanical endurance with over 78%efficiency retention after 10,000 cycles of consecutive bending cycles(R=6 mm).The introduction of ZIF-67 suppresses the cracking in device bending,which results in improved environmental stability and bending durability.

关键词： ZIF-67 Flexible perovskite solar cells Interfacial adhesion Stability

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Strain engineering in perovskite solar cells and its impacts on carrier dynamics

Strain engineering in perovskite solar cells and its impacts...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Cheng Zhu xiuxiu niu Yuhao Fu Lijun Zhang Huanping Zhou Qi Chen Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Materials Science & EngineeringBeijing Institute of Technology State Key Laboratory of Superhard Materials Key Laboratory of Automobile Materials of MOEand School of Materials Science and EngineeringJilin University Department of Materials Science and Engineering College of EngineeringPeking University

The mixed halide perovskites have emerged as outstanding light absorbers for efficient solar ***,it reveals inhomogeneity in these polycrystalline films due to composition separation,which leads to local lattice mismatches and emergent residual strains *** far,the understanding of these residual strains and their effects on photovoltaic device performance is *** we study the evolution of residual strain over the films by depth-dependent grazing incident X-ray diffraction *** identify the gradient distribution of in-plane strain component perpendicular to the ***,we reveal its impacts on the carrier dynamics over corresponding solar cells,which is stemmed from the strain induced energy bands bending of the perovskite absorber as indicated by first-principles ***,we modulate the status of residual strains in a controllable manner,which leads to enhanced PCEs up to 20.7%(certified) in devices via rational strain engineering.

关键词： residual strain GIXRD carrier dynamics band alignment

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Stress compensation based on interfacial nanostructures for stable perovskite solar cells

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Interdisciplinary Materials 2023年第2期2卷 348-359页

作者： Cheng Zhu Xi Wang Hangxuan Li Chenyue Wang Ziyan Gao Pengxiang Zhang xiuxiu niu Nengxu Li Zipeng Xu Zhenhuang Su Yihua Chen Huachao Zai Haipeng Xie Yizhou Zhao Ning Yang Guilin Liu Xueyun Wang Huanping Zhou Jiawang Hong Xingyu Gao Yang Bai Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Lowdimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina School of Aerospace Engineering Beijing Institute of TechnologyBeijingChina Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijingChina Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghaiChina Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangshaChina School of Science Jiangnan University WuxiWuxiJiangsuChina

The long-term stability issue of halide perovskite solar cells hinders their *** residual stress-strain affects device stability,which is derived from the mismatched thermophysical and mechanical properties between adjacent *** this work,we introduced the Rb_(2)CO_(3)layer at the interface of SnO_(2)/perovskite with the hierarchy morphology of snowflake-like microislands and dendritic *** a suitable thermal expansion coefficient,the Rb_(2)CO_(3)layer benefits the interfacial stress relaxation and results in a compressive stress-strain in the perovskite ***,reduced nonradiative recombination losses and optimized band alignment were *** enhancement of open-circuit voltage from 1.087 to 1.153 V in the resultant device was witnessed,which led to power conversion efficiency(PCE)of 22.7%(active area of 0.08313 cm^(2))and 20.6%(1 cm2).Moreover,these devices retained 95%of its initial PCE under the maximum power point tracking(MPPT)after 2700 *** suggests inorganic materials with high thermal expansion coefficients and specific nanostructures are promising candidates to optimize interfacial mechanics,which improves the operational stability of perovskite cells.

关键词： interfacial nanostructures long-term stability perovskite solar cells strain engineering thermal expansion coefficient

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Enhanced photochemical oxidation ability of carbon nitride by π-πstacking interactions with graphene

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Chinese Journal of Catalysis 2017年第2期38卷 278-286页

作者：郝强郝思濛牛秀秀李巽陈代梅丁浩中国地质大学(北京) 材料科学与工程学院北京100083

A one-pot method for the preparation of g-C3N4/reduced graphene oxide（rGO） composite photocatalysts with controllable band structures is *** photocatalysts are characterized by Fouirer transform infrared spectroscopy,X-ray diffraction,scanning electron microscope,transmission electron microscope,and Mott-Schottky *** valance band（VB） of g-C3N4 exhibits a noticeable positive shift upon hybridizing with rGO,and thus results in a strong photo-oxidation *** g-C3N4/rGO composites show a higher photodegradation activity for 2,4-dichlorophenol（2,4-DCP） and rhodamine B（RhB） under visible light irradiation（λ≥420 ran）.The g-C3N4/rGO-1sample exhibits the highest photocatalytic activity,which is 1.49 and 1.52 times higher than that of bulk g-C3N4 for 2,4-DCP and 1.52 times degradation,*** enhanced photocatalytic activity for g-C3N4 originates from the improved visible light usage,enhanced electronic conductivity and photo-oxidation ability by the formed strong π-π stacking interactions with rGO.

关键词： Graphitic carbon nitride Graphene oxide π–π stacking Photocatalyst Interaction

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Stress Compensation Based on Interfacial Nanostructures for Stable Perovskite Solar Cells

Stress Compensation Based on Interfacial Nanostructures for ...

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第十届新型太阳能材料科学与技术学术研讨会

The long-term stability issue of halide perovskite solar cells hinders their *** residual stress-strain affects device stability,which is derived from the mismatched thermophysical and mechanical properties between adjacent *** this work,we introduced the RbCO layer at the interface of SnO/perovskite with the hierarchy morphology of snowflake-like micro-islands and dendritic *** a suitable thermal expansion coefficient,the RbCO layer benefits the interfacial stress relaxation and results in a compressive stress-strain in the perovskite ***,reduced non-radiative recombination losses and optimized band alignment were *** enhancement of open-circuit voltage from 1.087 to 1.153 V in the resultant device was witnessed,which led to power conversion efficiency(PCE) of 22.7%(active area of 0.08313 cm),and 20.6%(1 cm).Moreover,these devices retained 95% of its initial PCE under the maximum power point tracking after 2700 *** suggests inorganic materials with high thermal expansion coefficients and specific nanostructures are promising candidates to optimize interfacial mechanics,which improves operational stability of perovskite cells.

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Recent Advances of Sensitive Electrochemical Sensing Platforms for Rapid Detection of Phthalate Acid Esters

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Instrumentation 2024年第2期11卷 9-23页

作者： xiuxiu Dong Lili Zhang Meicai Ge Minfu Wu Qijian niu Key Laboratory of Modern Agricultural Equipment and Technology(Jiangsu University) Ministry of EducationSchool of Agricultural EngineeringJiangsu UniversityZhenjiangJiangsu 212013China Nantong Huaxin Central Air-Conditioning CO. LTDNantongJiangsu 226014China Department of Food Science Foshan PolytechnicFoshanGuangdong 528137China

As a kind of plasticizer,phthalic acid esters(PAEs)are often added to plastics to enhance elasticity,transparency,durability and prolong service ***,it does not chemically bind to plastics and is easy to migrate to the *** is difficult to degrade in the environment,and it is also enriched in the human body through the food chain and respiration,which will lead to obvious adverse reactions such as decreased learning and memory function and neurobehavioral *** to the toxicity,universality and low concentration limitations of PAEs in the environment and food,it is essential to achieve rapid and sensitive detection of PAEs in soil,atmosphere,water and ***(EC)sensors have the advantages of simplicity,fast,low cost,portability,easy operation,high specificity and high sensitivity,so they are applied for the detection of *** there are a large number of studies on the detection of PAEs by EC sensors,there is no review on this *** this review,we introduce the detection of PAEs from classical EC sensors,electrochemiluminescence(ECL)sensors and photo-electrochemical(PEC)sensors in the past five *** review is beneficial to understanding the construction of EC sensors and the detection mechanism of *** also propose that the development of rapid,accurate and real-time detection methods of PAEs is key to assessing risk and preventing related diseases.

关键词： phthalate acid esters electrochemical sensor determination

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Creation of aromatic maize by CRISPR/Cas

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Journal of Integrative Plant Biology 2021年第9期63卷 1664-1670页

作者： Yanxiao Wang Xiaoqin Liu xiuxiu Zheng Wenxia Wang Xunqing Yin Haifeng Liu Changle Ma Xiaomu niu Jian-Kang Zhu Fei Wang College of Life Sciences Shandong Normal UniversityJinan 250014China Bellagen Biotechnology Co.Ltd. Jinan 250000China Shanghai Center for Plant Stress Biology and Center for Excellence in Molecular Plant Sciences Chinese Academy of SciencesShanghai 201602China

Aroma is an important quality parameter for breeding in rice(Oryza sativa).For example,the aromatic rice varieties basmati and jasmine rice,with a popcorn-like scent,are popular worldwide and routinely command a price premium.2-acetyl-1-pyrroline(2AP)is a key flavor compound among over 200 volatiles identified in fragrant rice.A naturally fragrant germplasm exists in multiple plant species besides rice,which all exhibit lower activity of BETAINE ALDEHYDE DEHYDROGENASE 2(BADH2).However,no equivalent aromatic germplasm has been described in maize(Zea mays).Here,we characterized the two maize BADH2 homologs,ZmBADH2a and *** generated zmbadh2a and zmbadh2b single mutants and the zmbadh2a-zmbadh2b double mutant by CRISPR/Cas in four inbred lines.A popcorn-like scent was only noticeable in seeds from the double mutant,but not from either single mutant or in wild *** agreement,we only detected 2AP in fresh kernels and dried mature seeds from the double mutant,which accumulated between 0.028 and 0.723 mg/kg *** results suggest that ZmBADH2a and ZmBADH2b redundantly participate in 2AP biosynthesis in maize,and represent the creation of the world's first aromatic maize by simultaneous genome editing of the two BADH2 genes.

关键词： aromatic maize 2-acetyl-1-pyrroline 2AP CRISPR/Cas

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营销视域下的常人理论:内涵、效应与调用

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外国经济与管理 2024年第1期46卷 139-152页

作者：冉雅璇牛熠欣张蕴涵李秀秀张谱月中南财经政法大学工商管理学院湖北武汉430073 南京大学商学院江苏南京210008

常人理论是一种与专家理论相对的个人朴素理论,是个体基于日常观察和个人经验形成的一般性知识构想。常人理论在日常生活中发挥着重要的作用,帮助人们理解和解释周围的现象,并指导其决策和行为。本研究首先对常人理论的内涵进行了界定,... 详细信息

常人理论是一种与专家理论相对的个人朴素理论,是个体基于日常观察和个人经验形成的一般性知识构想。常人理论在日常生活中发挥着重要的作用,帮助人们理解和解释周围的现象,并指导其决策和行为。本研究首先对常人理论的内涵进行了界定,厘清了常人理论与隐喻、图式、刻板印象之间的差异,系统归纳了常人理论的操纵和测量方法;其次,通过深入探究产品质量、医疗健康和消费者幸福三大主题,总结了常人理论在营销视域下的效应;再者,分析了常人理论的调用过程,以两篇话题不同的文章为例,阐释了信息可及性、可诊断性和可应用性在该过程中的关键作用;最后在此基础上,提出了未来研究展望,包括关注外部环境变化、加强算法领域应用以及可解释性的测量方法,以期进一步加深对常人理论在营销中作用的理解,并为相关领域的研究和实践提供指导。

关键词：常人常人理论营销领域朴素信念个人建构

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