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A novel dopant for spiro-OMeTAD towards efficient and stable perovskite solar cells

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Science China Materials 2021年第12期64卷 2915-2925页

作者： Zhipeng Lin Jing Li Hengyi Li Yanping Mo junye pan Chao Wang Xiao-Li Zhang Tongle Bu Jie Zhong Yi-Bing Cheng Fuzhi Huang Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Energy Materials and Surface Sciences Unit Okinawa Institute of Science and Technology Graduate UniversityOkinawa 904-0495Japan

2,2’,7,7’-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9’-spirobifluorene(spiro-OMeTAD), as the most commonly used hole transport material(HTM), plays a significant role in the normal structured(n-i-p) high-efficiency perovskite solar cells(PSCs). In general, it is prepared by a halogen solvent(chlorobenzene, CBZ) and needs an ion dopant(lithium bis(trifluoromethanesulfonyl)imide, Li-TFSI) to improve its conductivity and hole mobility. However, such a halogen solvent is not environmentally friendly and the widely used LiTFSI dopant would affect the stability of PSCs. Herein, we develop a non-halogen solvent-tetrahydrofuran(THF)-prepared spiro-OMeTAD solution with a new p-type dopant,potassium bis(fluorosulfonyl)imide(K-FSI), to apply into PSCs. By this strategy, high-hole-mobility spiro-OMeTAD film is achieved. Meanwhile, the potassium ions introduced by diffusion into perovskite surface passivate the interfacial defects. Therefore, a hysteresis-free champion PSC with an efficiency of 21.02% is obtained, along with significantly improved stability against illumination and ambient conditions. This work provides a new strategy for HTMs toward hysteresis-free high-efficiency and stable PSCs by substituting dopants.

关键词： perovskite solar cells spiro-OMeTAD K-FSI hysteresis-free

基于熵权法的城市韧性评估及障碍因子诊断——以河南省为例

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河南大学学报（自然科学版） 2023年第2期53卷 207-225页

作者：游谋邹泽铎潘俊业赵威孙浩航河南大学地理与环境学院/区域发展与规划研究中心/黄河中下游数字地理技术教育部重点实验室河南开封475004

以河南省18个省辖市为研究对象,通过构建河南省城市韧性水平评估指标体系,测度2004-2019年河南省城市韧性水平,分析其时空分异与演变,并引入障碍度模型诊断其障碍因子及障碍度.结果表明:(1)研究时段内河南省城市韧性水平总体得分以及经... 详细信息

以河南省18个省辖市为研究对象,通过构建河南省城市韧性水平评估指标体系,测度2004-2019年河南省城市韧性水平,分析其时空分异与演变,并引入障碍度模型诊断其障碍因子及障碍度.结果表明:(1)研究时段内河南省城市韧性水平总体得分以及经济韧性、社会韧性、生态韧性和工程韧性4个子系统得分均呈现出上升趋势;(2)在研究时段内河南省城市韧性水平的总体差异呈缩小的趋势;(3)中西部地区逐渐形成以高水平、中高水平为主的连绵分布区,东部和南部地区则形成以低水平、中低水平为主的连绵分布区;(4)河南省城市韧性水平的空间集聚效应呈现先减弱再逐渐增强的趋势;(5)子系统对河南省城市韧性水平的障碍度显著强度:工程韧性子系统>社会韧性子系统>经济韧性子系统>生态韧性子系统.实证研究结果可为河南省城市规划与实现城市可持续发展的政策制定提供有力支撑.

关键词：城市韧性综合评估障碍因子河南省

Novel two-step CdS deposition strategy to improve the performance of Cu2ZnSn(S,Se)4 solar cell

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Journal of Energy Chemistry 2020年第3期29卷 77-82页

作者： Lifang Teng junye Tong Gang Wang Lingling Wang Liping Chen Shaotong Wang Yinglin Wang Daocheng pan Xintong Zhang Yichun Liu Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology of Ministry of EducationNortheast Normal UniversityChangchun 130024JilinChina State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina

Kesterite Cu2ZnSn(S,Se)4(CZTSSe)solar cells have drawn worldwide attention for their promising photovoltaics performance and earth-abundant element composition,yet the record efficiency of this type of device is still far lower than its theoretical conversion *** band alignment and severe non-radiative recombination at CZTSSe/CdS heterojunction interfaces are the major causes limiting the current/voltage output and overall device ***,we propose a novel two-step CdS deposition strategy to improve the quality of CZTSSe/CdS heterojunction interface and thereby improve the performance of CZTSSe solar *** two-step strategy includes firstly pre-deposits CdS thin layer on CZTSSe absorber layer by chemical bath deposition(CBD),followed with a mild heat treatment to facilitate element inter-diffusion,and secondly deposits an appropriate thickness of CdS layer by CBD to cover the whole surface of pre-deposited CdS and CZTSSe *** solar energy conversion efficiency of CZTSSe solar cells with two-step deposited CdS layer approaches to 8.76%(with an active area of about 0.19 cm2),which shows an encouraging improvement of over 87.98%or 30.16%compared to the devices with traditional CBD-deposited CdS layer without and with the mild annealing process,*** performance enhancement by the two-step CdS deposition is attributed to the formation of more favorable band alignment at CZTSSe/CdS interface as well as the effective decrease in interfacial recombination paths on the basis of material and device *** two-step CdS deposition strategy is simple but effective,and should have large room to improve the quality of CZTSSe/CdS heterojunction interface and further lift up the conversion efficiency of CZTSSe solar cells.

关键词： Kesterite Solar cell CdS Two-step deposition Heterojunction interface

Robust hydrogel sensors for unsupervised learning enabled sign-to-verbal translation

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InfoMat 2023年第7期5卷 70-80页

作者： Hude Ma Haiyang Qin Xiao Xiao Na Liu Shaolei Wang junye Li Sophia Shen Shuqi Dai Mengmeng Sun Peiyi Li Xiaofang pan Mingjun Huang Baoyang Lu Jun Chen Lidong Wu Fisheries Engineering Institute Chinese Academy of Fishery SciencesBeijingthe People's Republic of China Chinese Academy of Fishery Sciences Beijingthe People's Republic of China Jiangxi Key Laboratory of Flexible Electronics Flexible Electronics Innovation InstituteJiangxi Science and Technology Normal UniversityNanchangthe People's Republic of China College of Food Science and Technology Shanghai Ocean UniversityShanghaithe People's Republic of China Department of Bioengineering University of CaliforniaLos AngelesCaliforniaUSA College of Electronics and Information Engineering Shenzhen UniversityShenzhenthe People's Republic of China South China Advanced Institute for Soft Matter Science and Technology School of Molecular Science and EngineeringSouth China University of TechnologyGuangzhouthe People's Republic of China SKKU Institute of Energy Science and Technology Sungkyunkwan UniversitySuwonRepublic of Korea

Highly stretchable and robust strain sensors are rapidly emerging as promising candidates for a diverse of wearable *** main challenge for the practical application of wearable electronics is the energy consumption and device *** consumption mainly depends on the conductivity of the sensor,and it is a key factor in determining device ***,we design a liq-uid metal(LM)-embedded hydrogel as a sensing material to overcome the bar-rier of energy consumption and device aging of wearable *** sensing material simultaneously exhibits high conductivity(up to 22 S m�1),low elastic modulus(23 kPa),and ultrahigh stretchability(1500%)with excel-lent robustness(consistent performance against 12000 mechanical cycling).A motion monitoring system is composed of intrinsically soft LM-embedded hydrogel as sensing material,a microcontroller,signal-processing circuits,Bluetooth transceiver,and self-organizing map developed software for the visu-alization of multi-dimensional *** system integrating multiple functions including signal conditioning,processing,and wireless transmission achieves monitor hand gesture as well as sign-to-verbal *** approach provides an ideal strategy for deaf-mute communicating with normal people and broadens the application of wearable electronics.

关键词： hydrogel liquid metal sign-to-verbal translation strain sensor unsupervised learning

Li+&Ag+ and Li+&Cd2+ double-ion-doping strategy to improve the efficiency of Cu2ZnSn(S,Se)4 solar cells

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Li+&Ag+ and Li+&Cd2+ double-ion-doping strategy to improve t...

第七届新型太阳能电池材料科学与技术学术研讨会

作者： junye Tong Gang Wang Daocheng pan Lingling Wang Xintong Zhang Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology of Ministry of EducationNortheast Normal University State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

Ion doping strategy is a promising method to enhance the efficiency of CuZnSn(S,Se)(CZTSSe) solar cells,however,most of the reported works focus on studying the single ion doping in CZTSSe absorber ***,Li&Agand Li&Cd double-ion-doping strategy are applied to improve the microstructure and device *** found that the double-ion-doping strategy can obviously increase the grain size,reduce the thickness of fine-grain layers and enhance the device ***,the PCEs of Li&Agand Li&Cd doped CZTSSe solar cells are up to 8.87 % and 8.39 %,*** shows an encouraging improvement of over 43.5 % and 35.8 % enhancement compared with the traditional method(6.18 %),and significantly higher than single ion doping strategy(7.60 %,7.99 % and 7.11 % for Li,Ag,and Cd doped CZTSSe solar cells).This work provides a new solution to improve the microstructure and device performances of CZTSSe solar cells.

关键词： Kesterite Solar cell Ion doping Thin film Solution process

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共轨管磨粒流加工大涡数值模拟

机械设计与研究 2016年第3期32卷 106-109,128页

作者：赵京鹤尹延路李俊烨潘毓学长春光华学院机械工程学院长春130033 长春理工大学机电学院长春130022

以磨粒流加工共轨管为研究对象,以大涡模拟的方法对磨粒流加工共轨管进行数值分析。通过对磨粒流加工共轨管过程中磨粒流的流动形态进行数值模拟,可获得在不同温度和进出口压力条件下共轨管各个支路的静态压强、动态压强和速度分布。以... 详细信息

以磨粒流加工共轨管为研究对象,以大涡模拟的方法对磨粒流加工共轨管进行数值分析。通过对磨粒流加工共轨管过程中磨粒流的流动形态进行数值模拟,可获得在不同温度和进出口压力条件下共轨管各个支路的静态压强、动态压强和速度分布。以此来分析温度以及进出口压力对磨粒流加工效果的影响,为磨粒流加工工艺的研究提供更加准确的依据。

关键词：磨粒流加工共轨管大涡模拟

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模块化人工湿地防堵塞结构设计研究

黄河水利职业技术学院学报 2023年第3期35卷 12-16页

作者：靳晓颖苏俊叶潘晓丹黄河水利职业技术学院河南开封475004 开封市祥符区水利局柳园口灌区管理处河南开封475004 豫西黄河河务局济源黄河河务局河南济源459000

潜流人工湿地在国家全域推进海绵城市建设进程中有较高的推广应用价值,但该湿地在运行过程中易出现堵塞问题。在分析人工湿地防堵塞结构设计要点的基础上,设计了一种填料可替换的双层种植套筒活水式模块化人工湿地,探讨了该类湿地的结... 详细信息

潜流人工湿地在国家全域推进海绵城市建设进程中有较高的推广应用价值,但该湿地在运行过程中易出现堵塞问题。在分析人工湿地防堵塞结构设计要点的基础上,设计了一种填料可替换的双层种植套筒活水式模块化人工湿地,探讨了该类湿地的结构组成、运行方式,分析了其优势和应用前景。

关键词：模块化人工湿地潜流人工湿地堵塞问题双层种植套筒填料替换植物收割停床休作

轴不对称支撑的手性N-O酰胺化合物催化亚胺硅氢化反应的过渡态研究

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高等学校化学学报 2015年第2期36卷 325-329页

作者：潘威马文广杨晓东郑昀晔宋碧清牛永志古吉胡栋宝杨芹朱华结玉溪中烟种子公司研发部玉溪653100 河北大学中国手性中心药物化学与分子诊断教育部重点实验室保定071002

利用Hartree-Fock(HF)算法和密度泛函理论(DFT)探讨了新型轴手性氮氧酰胺类配体催化亚胺C=N双键不对称硅氢化反应的过渡态.研究发现,H在Si原子上,反应经过渡态TS-2,能垒较低,由此得到产物(-)-N-(1-phenylethyl)aniline的e.e.值与实验结... 详细信息

利用Hartree-Fock(HF)算法和密度泛函理论(DFT)探讨了新型轴手性氮氧酰胺类配体催化亚胺C=N双键不对称硅氢化反应的过渡态.研究发现,H在Si原子上,反应经过渡态TS-2,能垒较低,由此得到产物(-)-N-(1-phenylethyl)aniline的e.e.值与实验结果相吻合.同时,本文还尝试采用合理的简化模型计算反应过渡态,其结果与使用全部分子用于过渡态能量计算的结论一致.

关键词：硅氢化反应过渡态密度泛函理论绝对构型手性氮氧酰胺化合物

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车用热泵系统结霜化霜实验研究

制冷学报 2020年第6期41卷 47-54页

作者：潘乐燕王天英牛凤仙刘江施骏业张耘李万勇陈江平上海交通大学上海200020 上海汽车集团股份有限公司技术中心上海201800

针对车用热泵系统在冬季室外换热器易结霜的问题,本文设计并搭建了实验系统对室外换热器结霜和化霜特性进行了研究,总结出了在实车上判断结霜以及化霜完成的方法,最后比较了∅2.1 mm和∅3.0 mm两种阀口直径的电子膨胀阀对化霜时间的影响... 详细信息

针对车用热泵系统在冬季室外换热器易结霜的问题,本文设计并搭建了实验系统对室外换热器结霜和化霜特性进行了研究,总结出了在实车上判断结霜以及化霜完成的方法,最后比较了∅2.1 mm和∅3.0 mm两种阀口直径的电子膨胀阀对化霜时间的影响。实验结果表明:换热器结霜程度可通过吸气温度或吸气压力相对于无霜状态下的变化率来判断,化霜完成可通过室外换热器出口温度大于0℃来判断。在不同环境温度及不同霜层的化霜工况中,电子膨胀阀阀口直径对化霜时间的影响并非一致,较大阀口直径电子膨胀阀前期化霜效果好,但后期因为阀口直径较大压缩机排气压力升速缓慢,导致室外换热器入口温度增速变缓反而不如较小阀口直径电子膨胀阀。因此在实际整车应用中,可选用较大阀口直径的电子膨胀阀结合智能控制,使总体化霜效果达到最优。

关键词：热泵电动车结霜化霜化霜效率