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Stability improvement under high efficiency—next stage development of perovskite solar cells

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Science China Chemistry 2019年第6期62卷 684-707页

作者： danni yu yue Hu Jiangjian Shi Haoying Tang Wenhao Zhang Qingbo Meng Hongwei Han Zhijun Ning He Tian School of Physical Science and Technology Shanghai Tech University Michael Gr?tzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of PhysicsChinese Academy of Sciences Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology

With efficiency of perovskite solar cells(PSCs) overpassing 23%, to realize their commercialization, the biggest challenge now is to boost the stability to the same level as conventional solar cells. Thus, tremendous effort has been directed over the past few years toward improving the stability of these cells. Various methods were used to improve the stability of bulk perovskites,including compositional engineering, interface adjustment, dimensional manipulation, crystal engineering, and grain boundary decoration. Diverse device configurations, carrier transporting layers, and counter electrodes are investigated. To compare the stability of PSCs and clarify the degradation mechanism, diverse characterization methods were developed. Overall stability of PSCs has become one central topic for the development of PSCs. In this review, we summarize the state-of-the-art progress on the improvement of device stability and discuss the directions for future research, hoping it provides an overview of the current status of the research on the stability of PSCs and guidelines for future research.

关键词： stability perovskite solar cell photoelectric device

High-member low-dimensional Sn-based perovskite solar cells

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Science China Chemistry 2023年第2期66卷 459-465页

作者： Hansheng Li Zihao Zang Qi Wei Xianyuan Jiang Mingyu Ma Zengshan Xing Jingtian Wang danni yu Fei Wang Wenjia Zhou Kam Sing Wong Philip C.Y.Chow yuanyuan Zhou Zhijun Ning School of Physical Science and Technology ShanghaiTech UniversityShanghai201210China Department of Physics Hong Kong University of Science and TechnologyHong Kong999077China Department of Mechanical Engineering The University of Hong KongHong Kong999077China Department of Physics Hong Kong Baptist UniversityHong Kong999077China

Sn-based perovskites are promising thin-film photovoltaic materials for their ideal bandgap and the eco-friendliness of Sn,but the performance of Sn-based perovskite solar cells is hindered by the short carrier diffusion length and large defect density in nominally-synthesized Sn-based perovskite *** we demonstrate that a long carrier diffusion length is achievable in quasi-2D Sn-based perovskite films consisting of high-member low-dimensional Ruddlesden-Popper(RP)phases with a preferred crystal orientation *** key to the film synthesis is the use of a molecular additive formed by phenylethylammonium cations and optimally mixed halide-pseudohalide anions,which favorably tailors the quasi-2D Sn-based perovskite crystallization *** high-member RP film structure effectively enhances device short-circuit current density,giving rise to an increased power conversion efficiency(PCE)of 14.6%.The resulting device demonstrates a near-unity shelf stability upon1,000 h in nitrogen.A high reproductivity is also achieved with a count of 50 devices showing PCEs within a narrow range from minimum 13.0%to maximum 14.6%.

关键词： Sn-based perovskite lead-free perovskite solar cells low-dimensional structure optoelectronics device

In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes

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Light(Science & Applications) 2023年第3期12卷 446-455页

作者： Hao Wang Weidong Xu Qi Wei Si Peng yuequn Shang Xianyuan Jiang danni yu Kai Wang Ruihua Pu Chenxi Zhao Zihao Zang Hansheng Li Yile Zhang Ting Pan Zijian Peng Xiaoqin Shen Shengjie Ling Weimin Liu Feng Gao Zhijun Ning School of Physical Science and Technology Shanghai Key Laboratory of High-resolution Electron MicroscopyShanghaiTech UniversityShanghaiChina Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’anChina Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköpingSweden

Regulation of perovskite growth plays a critical role in the development of high-performance optoelectronic ***,judicious control of the grain growth for perovskite light emitting diodes is elusive due to its multiple requirements in terms of morphology,composition,and ***,we demonstrate a supramolecular dynamic coordination strategy to regulate perovskite *** combined use of crown ether and sodium trifluoroacetate can coordinate with A site and B site cations in ABX_(3) perovskite,*** formation of supramolecular structure retard perovskite nucleation,while the transformation of supramolecular intermediate structure enables the release of components for slow perovskite *** judicious control enables a segmented growth,inducing the growth of insular nanocrystal consist of low-dimensional *** emitting diode based on this perovskite film eventually brings a peak external quantum efficiency up to 23.9%,ranking among the highest efficiency *** homogeneous nano-island structure also enables high-efficiency large area(1 cm^(2))device up to 21.6%,and a record high value of 13.6%for highly semi-transparent ones.

关键词： structure perovskite enable

条件性基因敲除诱导剂他莫昔芬对小鼠肠道微生物群组成的影响

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复旦学报（自然科学版） 2024年第1期63卷 68-76页

作者：余丹妮孙璘复旦大学生命科学学院发育生物学研究所上海200438

他莫昔芬(Tamoxifen)作为一种选择性雌激素受体调节剂,在临床上应用于治疗乳腺癌,在生物遗传学领域研究中充当诱导型Cre-loxP条件性基因敲除系统的时空开关。肠道微生物与宿主基因紧密相连,与宿主肠道吸收、代谢、发育性疾病、肿瘤密切... 详细信息

他莫昔芬(Tamoxifen)作为一种选择性雌激素受体调节剂,在临床上应用于治疗乳腺癌,在生物遗传学领域研究中充当诱导型Cre-loxP条件性基因敲除系统的时空开关。肠道微生物与宿主基因紧密相连,与宿主肠道吸收、代谢、发育性疾病、肿瘤密切相关,利用他莫昔芬诱导特定基因敲除已成为探究微生物与宿主基因互作的主要研究方式。已有研究表明他莫昔芬引发雌激素受体介导的毒性,干扰宿主生物学功能,少有研究报道他莫昔芬本身是否对小鼠肠道微生物群的稳定性造成影响,本研究通过给野生型C57BL/6J小鼠注射他莫昔芬模拟条件性基因敲除以研究其影响及机制。研究结果发现,注射他莫昔芬组与对照组相比,小鼠体重、肠道组织结构与形态及肠道屏障功能无明显差异,但他莫昔芬对小鼠粪便和盲肠内容物中的微生物丰度产生影响。这些结果提示使用他莫昔芬诱导小鼠条件性基因敲除时需要注意肠道菌群改变带来的生理和病理表型,从而减少他莫昔芬带来的干扰。

关键词：他莫昔芬 Cre-loxP条件性基因敲除系统肠道微生物群

Band alignment towards high-efficiency NiOx-based Sn-Pb mixed perovskite solar cells

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Science China Materials 2021年第3期64卷 537-546页

作者： Hao Chen Zijian Peng Kaimin Xu Qi Wei danni yu Congcong Han Hansheng Li Zhijun Ning School of Physical Science and Technology ShanghaiTech UniversityShanghai201210China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai200050China School of Chemistry and Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Narrow-bandgap tin-lead(Sn-Pb)mixed perovskite solar cells(PSCs)play a key role in constructing perovskite tandem solar cells that are potential to overpass Shockley-Queisser limit.A robust,chemically stable and lowtemperature-processed hole transporting layer(HTL)is essential for building high-efficiency Sn-Pb solar cells and perovskite tandem solar ***,we explore a roomtemperature-processed NiOx(L-NiOx)HTL based on nanocrystals(NCs)for Sn-Pb *** comparison with hightemperature-annealed NiOx(H-NiOx)film,the L-NiOx film shows deeper valence band and lower trap density,which increases the built-in potential and reduces carrier recombination,leading to a power conversion efficiency of 18.77%,the record for NiOx-based narrow-bandgap ***,the device maintains about 96%of its original efficiency after 50 *** work provides a robust and room-temperatureprocessed HTL for highly efficient and stable narrow-bandgap PSCs.

关键词： band alignment NiOx Sn-Pb mixed perovskite solar cell

Studies on the Analgesic Activity and Acute Toxicities of Bidens alba(L.) DC

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Agricultural Biotechnology 2019年第3期8卷 174-176页

作者： Minggui yuAN Qiyun GAO Rong XIANG Ting HUANG danni yu Zhihong XU Xinyu PENG Institute of Animal Health Guangdong Academy of Agricultural Sciences/Key Laboratory of Livestock Disease Prevention of Guangdong Province/Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Techniques of Guangdong provinceMinistry of AgricultureChina/Chinese Traditional Medicine Engineering Technology Research Center of Guangdong ProvinceGuangzhou 510640China Huadu District People's Hospital of Guangzhou Guangzhou 510800China

[Objectives]This study was conducted to investigate the analgesic effects and acute toxicities of Bidens alba (L.) DC.[Methods]The alcohol extract of *** (L.) DC was extracted and separated with petroleum ether and chloroform *** acute toxicities of the two extracts on mice were measured,and then the analgesic effects were measured with writhing pain model induced by acetic acid.[Results]No mice died when the crude dosages of *** (L.) DC from petroleum ether extract and chloroform extract were 5 016 and 5 100 mg/kg,*** the petroleum ether extract was 60.0 mg/kg,the percentage of twisted mice induced by acetic acid was 40%,the analgesic rate was 77.5%,and the time of the first writhing was (294.0±165.8) s;when the chloroform extract was 20.0 mg/kg,the percentage of twisted animals was 55.6%,the analgesic rate was 51.5%,and the time of the first writhing was (273.8 ±153.4) s;and when the chloroform extract was 4.0 mg/kg,the percentage of twisted animals was 40%,and the analgesic rate was 62.1%,and the time of the first writhing was (370.6±231.3) s.[Conclusions]The petroleum ether extracts and chloroform extracts of *** (L.) DC have good analgesic effects and no acute toxicities.

关键词： Bidens alba (L.) DC Mouse Analgesic effect Acute toxicity Petroleum ether Chloroform

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单向导湿纺织品的研究现状与应用

毛纺科技 2024年第11期52卷 133-138页

作者：于丹妮杨雪上海工程技术大学纺织服装学院上海201620

为进一步研究单向导湿纺织品和提高单向导湿纺织品的应用价值,对近些年单向导湿纺织品的功能研究和发展现状及应用进行综述,介绍了单向导湿纺织品的2个基本原理,并从纤维原料、织物结构和功能整理3个方面阐述了获得单向导湿纺织品的方... 详细信息

为进一步研究单向导湿纺织品和提高单向导湿纺织品的应用价值,对近些年单向导湿纺织品的功能研究和发展现状及应用进行综述,介绍了单向导湿纺织品的2个基本原理,并从纤维原料、织物结构和功能整理3个方面阐述了获得单向导湿纺织品的方法与研究进展,总结了单向导湿纺织品在服装领域、医疗卫生、油水分离上的应用前景,最后提出目前单向导湿纺织品在制备方法与多功能性方面的不足与展望。

关键词：单向导湿差动毛细效应润湿性差异表面改性织物结构

Surface heterojunction based on n-type low-dimensional perovskite film for highly efficient perovskite tandem solar cells

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National Science Review 2024年第5期11卷 244-253页

作者： Xianyuan Jiang Qilin Zhou yue Lu Hao Liang Wenzhuo Li Qi Wei Mengling Pan Xin Wen Xingzhi Wang Wei Zhou danni yu Hao Wang Ni Yin Hao Chen Hansheng Li Ting Pan Mingyu Ma Gaoqi Liu Wenjia Zhou Zhenhuang Su Qi Chen Fengjia Fan Fan Zheng Xingyu Gao Qingqing Ji Zhijun Ning School of Physical Science and Technology Shanghai Tech University Department of Modern Physics University of Science and Technology of China i-Lab CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Advanced Research InstituteChinese Academy of Sciences

Enhancing the quality of junctions is crucial for optimizing carrier extraction and suppressing recombination in semiconductor devices. In recent years, metal halide perovskite has emerged as the most promising next-generation material for optoelectronic devices. However, the construction of high-quality perovskite junctions, as well as characterization and understanding of their carrier polarity and density,remains a challenge. In this study, using combined electrical and spectroscopic characterization techniques,we investigate the doping characteristics of perovskite films by remote molecules, which is corroborated by our theoretical simulations indicating Schottky defects consisting of double ions as effective charge *** a post-treatment process involving a combination of biammonium and monoammonium molecules, we create a surface layer of n-type low-dimensional perovskite. This surface layer forms a heterojunction with the underlying 3D perovskite film, resulting in a favorable doping profile that enhances carrier extraction. The fabricated device exhibits an outstanding open-circuit voltage(VOC) up to 1.34 V and achieves a certified efficiency of 19.31% for single-junction wide-bandgap（1.77 eV） perovskite solar cells, together with significantly enhanced operational stability, thanks to the improved separation of carriers. Furthermore, we demonstrate the potential of this wide-bandgap device by achieving a certified efficiency of 27.04% and a VOCof 2.12 V in a perovskite/perovskite tandem solar cell configuration.

关键词： perovskite solar cells field effect transistors heterojunction

变链菌F-ATP酶β亚基基因的克隆与F-ATP酶活性分析

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天津医药 2007年第9期35卷 658-660页

作者：于丹妮江立天津医科大学第二医院口腔科 300211

目的:分析变链菌F-ATP酶β亚基基因的克隆片段对转化后大肠杆菌的F-ATP酶活性的影响。方法:采用PCR方法,以变链菌基因组DNA为模板扩增F-ATP酶β亚基5′末端序列,将克隆片段与载体pVA891酶切后连接,形成重组质粒;并转化大肠杆菌,对转化... 详细信息

目的:分析变链菌F-ATP酶β亚基基因的克隆片段对转化后大肠杆菌的F-ATP酶活性的影响。方法:采用PCR方法,以变链菌基因组DNA为模板扩增F-ATP酶β亚基5′末端序列,将克隆片段与载体pVA891酶切后连接,形成重组质粒;并转化大肠杆菌,对转化后大肠杆菌的F-ATP酶活性进行初步分析。结果:变链菌F-ATP酶β亚基基因的克隆片段通过构建重组质粒转化进入大肠杆菌,转化后大肠杆菌的F-ATP酶活性与未转化的亲代菌株进行比较差异有统计学意义(P<0.01)。结论:本研究从基因的角度进一步论证了F-ATP酶β亚基基因对细菌F-ATP酶活性具有影响。

关键词：链球菌变异质子转运ATP酶类基因克隆分子大肠杆菌