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Resist Thermal Shock Through Viscoelastic Interface Encapsulation in Perovskite Solar Cells

ENERGY & ENVIRONMENTAL MATERIALS 2024年第6期7卷 238-245页

作者： Ma, Sai Tang, Jiahong yuan, guizhou Zhang, Ying Wang, Yan Wu, Yuetong Zhu, Cheng Wang, Yimiao Wu, Shengfang Lu, Yue Chi, Shumeng Song, Tinglu Zhou, Huanping Sui, Manling Li, Yujing Chen, Qi Beijing Inst Technol Sch Mat Sci & Engn Beijing Key Lab Construct Tailorable Adv Funct Mat MIIT Key Lab Low Dimens Quantum Struct & DevicesE Beijing 100081 Peoples R China Beijing Univ Technol Coll Mat Sci & Engn Beijing Key Lab Microstruct & Properties Solids Beijing 100124 Peoples R China Jiangnan Univ Anal & Testing Ctr Wuxi 214122 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China

Enhancing the lifetime of perovskite solar cells (PSCs) is one of the essential challenges for their industrialization. Although the external encapsulation protects the perovskite device from the erosion of moisture and oxygen under various harsh conditions. However, the perovskite devices still undergo static and dynamic thermal stress during thermal and thermal cycling aging, respectively, resulting in irreversible damage to the morphology, component, and phase of stacked materials. Herein, the viscoelastic polymer polyvinyl butyral (PVB) material is designed onto the surface of perovskite films to form flexible interface encapsulation. After PVB interface encapsulation, the surface modulus of perovskite films decreases by nearly 50%, and the interface stress range under the dynamic temperature field (-40 to 85 degrees C) drops from -42.5 to 64.8 MPa to -14.8 to 5.0 MPa. Besides, PVB forms chemical interactions with FA+ cations and Pb2+, and the macroscopic residual stress is regulated and defects are reduced of the PVB encapsulated perovskite film. As a result, the optimized device's efficiency increases from 22.21% to 23.11%. Additionally, after 1500 h of thermal treatment (85 degrees C), 1000 h of damp heat test (85 degrees C & 85% RH), and 250 cycles of thermal cycling test (-40 to 85 degrees C), the devices maintain 92.6%, 85.8%, and 96.1% of their initial efficiencies, respectively. Viscoelastic PVB material is innovatively designed to form a flexible interface encapsulation. The Surface modulus and interface stress concentration zone are effectively alleviated. The stability breakthroughs in IEC 61215 (thermal treatment at 85 degrees C, damp heat test (85 degrees C & 85% RH), thermal cycling test (-40 to 85 degrees C)) has achieved through the systemic encapsulation by combining internal and external encapsulation. image

关键词： device stability perovskite solar cells stress field surface modulus thermal shock STABILITY

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Gelation of Hole Transport Layer to Improve the Stability of Perovskite Solar Cells

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Nano-Micro Letters 2023年第10期15卷 305-316页

作者： Ying Zhang Chenxiao Zhou Lizhi Lin Fengtao Pei Mengqi Xiao Xiaoyan Yang guizhou yuan Cheng Zhu Yu Chen 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 100081People’s Republic of China

To achieve high power conversion efficiency(PCE) and long-term stability of perovskite solar cells(PSCs), a hole transport layer(HTL) with persistently high conductivity, good moisture/oxygen barrier ability, and adequate passivation capability is important. To achieve enough conductivity and effective hole extraction, spiro-OMe TAD, one of the most frequently used HTL in optoelectronic devices, often needs chemical doping with a lithium compound(LiTFSI). However, the lithium salt dopant induces crystallization and has a negative impact on the performance and lifetime of the device due to its hygroscopic nature. Here, we provide an easy method for creating a gel by mixing a natural small molecule additive(thioctic acid, TA) with spiro-OMe TAD. We discover that gelation effectively improves the compactness of resultant HTL and prevents moisture and oxygen infiltration. Moreover, the gelation of HTL improves not only the conductivity of spiro-OMe TAD, but also the operational robustness of the devices in the atmospheric environment. In addition, TA passivates the perovskite defects and facilitates the charge transfer from the perovskite layer to HTL. As a consequence, the optimized PSCs based on the gelated HTL exhibit an improved PCE(22.52%) with excellent device stability.

关键词： Perovskite solar cell Hole transport layer Gelation Humidity stability Aggregation of LiTFSI

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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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Research on the Competition Degree and Competition Strategy of China's Processing Industries of Agricultural Products Based on the Potter Model——Taking "LaoGanMa" as an Example

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Asian Agricultural Research 2011年第2期3卷 138-140,144页

作者： yuan Jia-Ju guizhou College of Finance and Economics,Guiyang 550004,China

By using Porter's Five Forces Model,and from 5 aspects of individual farmer,purchaser,new entrant,substitute and the enterprise of the same trade,I analyze the leading enterprise in guizhou Province-LaoGanMa,so as to reveal the commonality and particularity reflected from the competition degree of LaoGanMa as follows:LaoGanMa has absolute dominance over material purchase;the purchasers' recognition on the quality of LaoGanMa,bearing capacity of sales price and habitual consumption allay consumers' ability to bargain;as for the problems of substitutes,the threat of new entrants and competition of the same trading,LaoGanMa has not done *** thesis formulates the competitive strategy conducive to development,like differentiation strategy,Cost-leadership strategy and brand strategy,in order to promote the development of processing industries of agricultural products.

关键词： Potter Model Competition degree Competition strate

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Impeded degradation of perovskite solar cells via the dual interfacial modification of siloxane

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Science China Chemistry 2022年第11期65卷 2299-2306页

作者： Xiao Zhang Changsu Cao Yang Bai Cheng Zhu Huachao Zai Sai Ma Yihua Chen Zhenhua Cui Congbo Shi Chenyue Wang Chenxiao Zhou guizhou yuan Ziyan Gao Jiawang Hong Jie Dou Hao Wang Huanping Zhou Hai Xiao Jun Li Qi Chen Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing 100084China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

It is challenging to improve the long-term stability of perovskite solar cells(PSCs) without sacrificing efficiency. The perovskite absorbers degrade from the film surface/interfaces, which follows entangled mechanisms that have not been fully revealed ***, we decouple and elaborate two distinctive pathways regarding film degradation based on ***, a dual interfacial modification strategy has been developed for improving the material’s intrinsic stability, thus leading to the film degrading in a more retardant pathway. The corresponding PSCs achieve a stable power output efficiency of 23.75%.More importantly, the unencapsulated PSCs devices retain over 93% of their initial PCE after the maximum power point(MPP)tracking under the continuous 1-sun illumination and show significantly improved stability after aged under the thermal treatment or stored in ambient atmosphere for over 1500 hours without obvious PCE decay. This work shows the importance of modulating the degradation pathway on stability improvement, and at the same time, proposes a strategy for designing perovskite-based optoelectronics with excellent performance and stability.

关键词： perovskite solar cells stability degradation kinetics

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图书馆管理行为融入投资决策模式的思考

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贵图学刊 2011年第3期 64-65,63页

作者：袁吉文贵州民族学院图书馆贵州贵阳550025

投资决策追求投资回报率,它以资金的盈亏直观评价投资决策的优劣。图书馆管理行为,同样追求以最小的成本付出,取得较大的管理效果。股票投资是常见的一种投资决策行为,本文以股票投资为例,探讨图书馆管理行为的规范化、科学化。

关键词：图书馆管理投资决策模式股票投资

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浅谈ILASII系统的现刊记到工作

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贵图学刊 2010年第3期 29-30,49页

作者：袁丽佳贵州省图书馆贵州贵阳550003

现刊记到是期刊管理的日常工作,也是期刊管理的基础工作之一。本文结合我馆工作实际,对ILASII系统的中文现刊记到工作的特点进行了简要总结,对中文现刊记到工作的流程进行了梳理,并对中文期刊中经常出现的多版化、刊名变更、合刊、停刊... 详细信息

现刊记到是期刊管理的日常工作,也是期刊管理的基础工作之一。本文结合我馆工作实际,对ILASII系统的中文现刊记到工作的特点进行了简要总结,对中文现刊记到工作的流程进行了梳理,并对中文期刊中经常出现的多版化、刊名变更、合刊、停刊或休刊、创刊号与增刊等问题指出了注意事项。

关键词： ILASII系统现刊记到期刊管理

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贵州凤仙花属二新种(英文)

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植物分类学报 1996年第1期34卷 98-101页

作者：熊源新贵州农学院贵阳550025

1 匙叶凤仙新种图1 Impatiens spathulata Y. X. Xiong, sp. nov. Species habitu I. pritzelii Hook. f. similis, a qua foliis obovatis, oblanceolatis,spathulatis vel oblongis; vexillo elliptico, alis brevioribus, lobis di... 详细信息

关键词：凤仙花属凤仙花科新种

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