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Highly stable perovskite solar cells with a novel Ni-based metal organic complex as dopant-free hole-transporting material

能源与环境材料（英文） 2023年第5期6卷 219-227页

作者： Rongjun Zhao Tai Wu Rongshan Zhuang Yong Hua Yude Wang yunnan Key Laboratory for Micro/Nano Materials & technology School of Materials and EnergyYunnan UniversityKunming 650504China Key Lab of Quantum Information of yunnan province Yunnan UniversityKunming 650504China

Understanding the effect of additive on the interfacial charge-carrier transfer dynamics is very crucial to obtaining highly efficient perovskite solar cells(PSCs).Herein,we designed a simple additive,dimethyl oxalate(DO),functioning as an effective defect passivator of perovskite grain boundaries via the coordination interaction between the carbonyl(C=O)and the exposed Pb2+.The modification with DO produces pinhole-free and compact perovskite films,enhancing the transportation capability of *** a consequence,the DO-treated PSCs exhibited a power conversion efficiency(PCE)of 22.19％,which is significantly higher than that of the control device without additive(19.58％).More importantly,detailed transient absorption characterization reveals that the use of additive can decrease the hot-carrier cooling dynamics,improve the carrier transfer,and eliminate nonradiative recombination in *** present work provides a profound understanding the additives effect on the carrier dynamics in PSCs toward the Shockley-Queisser limit.

关键词： additive engineering carrier dynamics defect passivation Perovskite solar cell

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Journal of Energy Chemistry 2022年第2期31卷 312-318页

作者： Tai Wu Linqin Wang Rongjun Zhao Rongshan Zhuang Kanghong Zhao Gaoyuan Liu Jing Huang Licheng Sun Yong Hua yunnan Key Laboratory for Micro/Nano Materials&technology International Joint Research Center for Optoelectronic and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091YunnanChina Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina Department of Applied Physics KTH-Royal Institute of Technology16440 StockholmSweden

Hole-transporting material(HTM)plays a paramount role in enhancing the photovltaic performance of perovskite solar cells(PSCs).Currently,the vast majority of these HTMs employed in PSCs are organic small molecules and polymers,yet the use of organic metal complexes in PSCs applications remains less *** date,most of reported HTMs require additional chemical additives(***-TFSI,t-TBP)towards high performance,however,the introduction of additives decrease the PSCs device ***,an organic metal complex(Ni-TPA)is first developed as a dopant-free HTM applied in PSCs for its facile synthesis and efficient hole extract/transfer ***,the dopant-free Ni-TPAbased device achieves a champion efficiency of 17.89%,which is superior to that of pristine Spiro-OMeTAD(14.25%).Furthermore,we introduce a double HTM layer with a graded energy bandgap containing a Ni-TPA layer and a CuSCN layer into PSCs,the non-encapsulated PSCs based on the Ni-TPA/CuSCN layers affords impressive efficiency up to 20.39%and maintains 96%of the initial PCE after 1000 h at a relative humidity around 40%.The results have demonstrated that metal organic complexes represent a great promise for designing new dopant-free HTMs towards highly stable PSCs.

关键词： Perovskite solar cell Hole transporting material Organic metal complex Dopant-free

Genomics Approaches to Domestication Studies of Horticultural Crops

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Horticultural Plant Journal 2019年第6期5卷 240-246页

作者： Zhongmin Yang Guixiang Li Denise Tieman Guangtao Zhu Key Lab for Potato Biology in Universities of yunnan The CAAS-YNNU Joint Academy of Potato SciencesYunnan Normal UniversityKunming 650500China Horticultural Sciences Department Plant Innovation CenterUniversity of FloridaGainesvilleFlorida 32611USA

The majority of crops we eat today are derived from the domestication of their wild progenitors. Crop domestication satisfies the human need for food and nutrition. Characterization of the history and genetic basis of crop domestication is essential for us to conduct modern breeding practices. Genomics provide unprecedented opportunities for us to study domestication. In this review, the typical domestication syndromes of horticultural crops will be introduced. Using the tomato as a typical example, we will discuss how genetic and genomic data were used to decipher the origins, progenitors, and domestication processes of this crop. In the domestication exploration of the genetic basis especially,genome-scaled diversity scanning approaches have gained great popularity. Combining these approaches with QTL(Quantitative trait locus)-mapping, GWAS(Genome wide association study), metabolomics and homology-based searches as well as pan-genomics have demonstrated tremendous advantages and significantly contribute to our understanding of domestication. Genomics studies will accelerate domestication research and further breeding of crops.

关键词： domestication syndrome crop origin genomic scanning domestication genes genetic analysis

High-speed imaging observation on molten bridges of AgNi10 electrical contact material

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Rare Metals 2023年第1期42卷 336-345页

作者： Jing-Hong Chen Song Chen Ming Xie Jie-Qiong Hu Sai-Bei Wang State Key Laboratory of advanced Technologies for Comprehensive Utilization of Platinum Metal Kunming Institute of Precious MetalsKunming650106China

The electrical contact-high-speed imaging experimental system was developed to investigate the molten bridge phenomena of AgNi10 electrical contact *** dimension of molten bridges was measured along with the measurement of waveforms in the contact voltage under the load of direct current(DC) 6 V(8-20 A)and breaking speed of 50.0 mm·s^(-1).A part of the observed results was presented as well as surface morphology of the contacts after electrical contact behavior,which shows some interesting and new *** bridges and arc could exist *** stable molten bridge looks like cylindrical shape and then becomes needle tip at its rupture,the diameter and length of molten bridges both increase with the increase in current and the growth gradient of the diameter is larger than that of the *** morphology and elemental distribution of the contact surface are changed by the behavior of electrical contact.

关键词： Molten bridge High-speed imaging Arc AgNi10 electrical contact material

Monolithic polyimine vitrimer/graphene aerogel composites

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Chinese Chemical Letters 2023年第2期34卷 529-533页

作者： Jinye Zhang Shichang Luo Yunlong Ma Ruiyang Li Yinghua Jin Li Qiu Wei Zhang yunnan Key Laboratory for Micro/Nano Materials&technology National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091China Department of Chemistry University of Colorado BoulderBoulderCO 80309United States

Graphene-polymer composites have attracted great attention as sensing materials due to their tailorable electrical conductivity, physicochemical properties, and sensitivity to geometric and functional ***, we report the first example of cylindrical monolithic polyimine vitrimer/graphene composites with excellent mechanical, compressive, rehealable and recyclable, and piezoresistive properties via simple infiltration of polymer monomers into the pores of graphene aerogel followed by thermal curing. The composites exhibit excellent durable compressibility(negligible reduction in the compression properties even after 3000 consecutive compression cycles), rapid recovery to the original size upon stress released,high compressive strength(up to 1.2 MPa), and high conductivity(up to 79 S/m). Excellent piezoresistive properties were observed, displaying consistent and reliable change of the electrical resistance with the compression ratio. Furthermore, rehealing with ~100% recovery of the compressive strength and electric conductivity was achieved under mild rehealing conditions, which is highly desired but has rarely been reported for electronic materials. The facile strategy for fabrication of rehealable monolithic polymer/GAs can open new possibilities for the sustainable development of composites with high electrical conductivity for various applications such as sensing, health monitoring, and movement detection.

关键词： Vitrimer Graphene aerogel Polyimine Rehealable Piezoresistive Monolithic

Inheritance of steroidal glycoalkaloids in potato tuber flesh

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Journal of Integrative Agriculture 2019年第10期18卷 2255-2263页

作者： PENG Zhen WANG Pei TANG Die SHANG Yi LI Can-hui HUANG San-wen ZHANG Chun-zhi The CAAS-YNNU Joint Academy of Potato Sciences Yunnan Normal UniversityKunming 650500P.R.China Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs Agricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518124P.R.China Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture and Rural Affairs Sino-Dutch Joint Laboratory of Horticultural GenomicsInstitute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081P.R.China

Potato (Solanum tuberosum L.) is the third most important food crop worldwide after wheat and rice in terms of human consumption. A critical domestication trait for potato was the decrease of toxic steroidal glycoalkaloids (SGAs) in tuber flesh. Here, we used a diploid F2 segregating population derived from a cross between S. tuberosum and the wild potato species Solanum chacoense to map the quantitative trait loci (QTLs) associated with the regulation of SGAs content in tuber flesh. In a three-year study, we identified two QTLs on chromosomes 2 and 8 affecting SGAs content in tuber flesh. The QTL on chromosome 8 harbors 38 genes that are co-expressed with the GLYCOALKALOID METABOLISM genes. These findings lay the foundation for exploiting the genes controlling SGAs content in tuber flesh and they provide a theoretical basis for the use of wild germplasm in potato breeding.

关键词： steroidal glycoalkaloids domestication tuber flesh QTL mapping

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金包银复合键合丝的组织演变及变形行为

稀有金属材料与工程 2021年第10期50卷 3538-3542页

作者：康菲菲裴洪营周文艳罗建强吴永瑾俞建树王佳贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室云南昆明650106 中国电子科技集团公司第二十九研究所四川成都610036

采用金相显微镜、双束离子显微镜、高低温拉力仪及纳米压痕仪对不同真应变条件的金包银复合键合丝的组织和力学性能进行表征,研究了金包银复合键合丝的组织结构演变、力学性能及变形行为特点。结果表明:金包银复合键合丝的银合金芯材沿... 详细信息

采用金相显微镜、双束离子显微镜、高低温拉力仪及纳米压痕仪对不同真应变条件的金包银复合键合丝的组织和力学性能进行表征,研究了金包银复合键合丝的组织结构演变、力学性能及变形行为特点。结果表明:金包银复合键合丝的银合金芯材沿着拉伸方向从胞状树枝晶演变为纤维组织,靠近界面的过渡层始终保持细小的等轴晶或球状晶粒,金包覆层在变形过程中均匀连续。各组分在变形过程中尺寸变化不一致,拟合后的尺寸变化常数与试样直径的变化不成正比。显微硬度、抗拉强度、延伸率均随着变形量的增加而增大。在单轴拉伸过程中,金包银复合键合丝组分之间相互制约,使单向拉应变变为复杂的二维应力状态,交替变化的应力状态可抑制裂纹的形核,提高材料的塑性和韧性。

关键词：层状复合材料金包银键合丝组织演变变形行为

金丝的力学特征对球键合的微观组织和性能的影响

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稀有金属材料与工程 2022年第10期51卷 3632-3637页

作者：康菲菲周文艳俞建树季兴桥王佳陈绪波罗建强梁辰吴永瑾裴洪营贵研铂业股份有限公司稀贵金属综合利用新技术国家重点实验室云南昆明650106 中国电子科技集团第二十九研究所四川成都610036

用电子背散射衍射仪对具有不同力学特征金丝的微区组织进行表征,采用扫描电镜和光学显微镜观察线弧轮廓、热影响区和焊点形貌,并通过推拉力测试仪测量线弧拉力和焊球剪切力,分析金丝力学特征对球键合质量的影响。结果表明:半硬态1和半硬... 详细信息

用电子背散射衍射仪对具有不同力学特征金丝的微区组织进行表征,采用扫描电镜和光学显微镜观察线弧轮廓、热影响区和焊点形貌,并通过推拉力测试仪测量线弧拉力和焊球剪切力,分析金丝力学特征对球键合质量的影响。结果表明:半硬态1和半硬态2的金丝芯部保持纤维状组织,边缘晶粒为细小的等轴晶,沿径向微区组织形貌有明显差异。打火烧球后形成的热影响区长度短,球颈部的组织有明显的梯度性,键合后弧高较小。软态金丝的组织为粗大的等轴晶,沿径向分布均匀,键合拉力低,易发生滑球现象。半硬态2金丝与焊盘的结合力强,引线键合拉力高,综合键合质量优,是最适合球键合工艺的金丝。

关键词：金丝球键合工艺力学特征热影响区长度键合质量

Study on characteristics of Ni-W-B composites containing CeO_2 nano-particles prepared by pulse electrodeposition

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Journal of Rare Earths 2012年第1期30卷 43-47页

作者： WANG Junli XU Ruidong ZHANG Yuzhi Research Center for Analysis and Measurement Kunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy En-gineering Kunming University of Science and TechnologyKunming 650093China Key Laboratory of Inorganic Coating Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Ni-W-B composites containing CeO2 nano-particles on the surface of 45 steel were prepared by pulse electrodeposition,and the in-fluence of pulse frequency,pulse duty circle and heat treatment temperature on the structures and properties were *** results in-dicated that the pulse co-deposition of Ni,W,B and CeO2 nano-particles led to Ni-W-B/CeO2 composites possessing higher microhardness and better wear resistance when heat-treated at 400 oC for 1 *** microhardness of 636 HV and the deposition rate of 0.0281 mm/h of the as-deposited alloy were the highest at pulse frequency of 1000 Hz,pulse duty circle of 10% and pulse average current density of 10 A/*** composites were mainly in the amorphous state and were partially crystallized as-deposited,and the crystallization trend was strength-ened when heat-treated at 400 *** pulse duty cycle from 75% to 10% was favorable to the refinement in grain structures and im-provement of *** crystal sizes of the composites were smaller by means of pulse electrodeposition.

关键词： pulse electrodeposition composites characteristics rare earths