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Unravel the Charge-Carrier Dynamics in Simple Dimethyl Oxalate-Treated Perovskite Solar Cells with Efficiency Exceeding 22%

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Energy & Environmental Materials 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 Pb^(2+).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

Further evidence for paternal DNA transmission in gynogenetic grass carp

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Science China(Life Sciences) 2020年第9期63卷 1287-1296页

作者： Zhuangwen Mao Yeqing Fu Shi wang yude wang Kaikun Luo Chun Zhang Min Tao Shaojun Liu State Key Laboratory of Developmental Biology of Freshwater Fish Hunan Normal UniversityChangsha 410081China College of Life Sciences Hunan Normal UniversityChangsha 410081China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081China

Gynogenesis is an important breeding method in aquaculture and has been widely applied to many fish *** gynogenetic progenies are to inherit paternal partial genomic DNA,this will increase genetic variation and will provide a useful outcome for *** this study,we investigated the genetic variation in homeobox(Hox)gene clusters(Hox A4 a,Hox A9 a,Hox A11 b,Hox B1 b,Hox C4 a,Hox C6 b,and Hox D10 a)among koi carp(Cyprinus carpio haematopterus,KOC;the stimulation sperm source),grass carp(Ctenopharyngodon idellus),and gynogenetic grass carp(GGC).We found paternal DNA(a special DNA fragment and Hox C6 b)derived from KOC and a recombinant gene belonging to Hox C6 b in *** are the first to report the recombinant Hox C6 b in *** study provides further evidence for paternal DNA transmission to gynogenetic progenies,which is a finding with great significance for the genetic breeding of fish.

关键词： Ctenopharyngodon idellus Cyprinus carpio haematopterus gynogenesis Hox genes DNA fragment recombinant gene

Gas sensors based on TiO_(2) nanostructured materials for the detection of hazardous gases: A review

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Nano Materials Science 2021年第4期3卷 390-403页

作者： Xu Tian Xiuxiu Cui Tingrun Lai Jie Ren Zhichao Yang Mingjing Xiao Bingsen wang Xuechun Xiao yude wang School of Materials and Energy Yunnan University650091KunmingPR China National Center for International Research on Photoelectric and Energy Materials Yunnan University650091KunmingPR China Key Lab of Quantum Information of Yunnon Province Yunnon University650091KunmingPR China

Hazardous gases have been strongly associated with being a detriment to human life within the environment The development of a reliable gas sensor with high response and selectivity is of great signifcance for detecting different hazardous ***_(2) nanomaterials are promising candidates with great potential and excellent per-formance in gas sensor applications,such as hydrogen,acetone,ammonia,and ethanol *** review begins with a detailed discussion of the di ferent dimensional morphologies of TiO_(2),whitch affect the gas sensing performance of TiO_(2) *** diverse morphologies of TiO_(2) can easily be tuned by regulating the manufacturing ***,they exhibit unique characteristics for detecting gases,including large specific suface area,superior elecron tr ansport rates,extraordinary pemmeability,and active reaction sites,which offer new opportunities to improve the gas sensing *** addition,a variety of efforts have been made to functional TiO_(2) nanomaterials to further enhance sensing properties,including TiO_(2)-based composites and light-assisted gas *** enhanced gas sensing mechanisms of multi-component composite nano-materials based on TiO_(2) include loaded noble metals,doped elements,constructed heterojunctions,and com-pounded with other functional ***,several studies have been summarized to demonstate the compar ative sensing properties of TiO_(2)-based gas sensors.

关键词： Gas sensor TiO_(2)nanomaterials TiO_(2)-Based composites Gas sensing mechanisn

SnO_(2)nanostructured materials used as gas sensors for the detection of hazardous and flammable gases:A review

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Nano Materials Science 2022年第4期4卷 339-350页

作者： Yulin Kong Yuxiu Li Xiuxiu Cui Linfeng Su Dian Ma Tingrun Lai Lijia Yao Xuechun Xiao yude wang School of Materials and Energy Yunnan University650091KunmingPeople's Republic of China State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Kunming Institute of Precious Metals650106KunmingPeople's Republic of China National Center for International Research on Photoelectric and Energy Materials Yunnan University650091KunmingPeople's Republic of China Key Lab of Quantum Information of Yunnan Province Yunnan University650091KunmingPeople's Republic of China

SnO_(2)has been extensively used in the detection of various *** a gas sensing material,SnO_(2)has excellent physical-chemical properties,high reliability,and short adsorption-desorption *** application of the traditional SnO_(2)gas sensor is limited due to its higher work-temperature,low gas response,and poor *** can significantly impact gas-sensitive properties due to the quantum size,surface,and small size effects of *** applying nanotechnology to the preparation of SnO_(2),the SnO_(2)nanomaterial-based sensors could show better performance,which greatly expands the application of SnO_(2)gas *** this review,the preparation method of the SnO_(2)nanostructure,the types of gas detected,and the improvements of SnO_(2)gas-sensing performances via elemental modification are introduced as well as the future development of SnO_(2)is discussed.

关键词： SnO_(2)nanostructured materials Gas sensor Preparation methods Gas-sensing performances

An improved hybrid bream derived from a hybrid lineage of Megalobrama amblycephala(♀)×Culter alburnus(♂)

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Science China(Life Sciences) 2022年第6期65卷 1213-1221页

作者： Dingbin Gong Min Tao Lihui Xu Fangzhou Hu Zehong Wei Shi wang yude wang Qingfeng Liu Chang Wu Kaikun Luo Chenchen Tang Rong Zhou Chun Zhang Yuequn wang Shaojun Liu State Key Laboratory of Developmental Biology of Freshwater Fish Hunan Normal UniversityChangsha 410081China College of Life Sciences Hunan Normal UniversityChangsha 410081China

Distant hybridization is an important technique in fish genetic *** this study,based on the establishment of an allodiploid fish lineage(BT,2n=48,F_(1)–F_(6))derived from distant hybridization between female Megalobrama amblycephala(BSB,2n=48)and male Culter alburnus(TC,2n=48),and the backcross progeny(BTB,2n=48)derived by backcrossing female F_(1) of BT to male BSB,an improved hybrid bream(BTBB,2n=48)was obtained by backcrossing BTB(♀)to BSB(♂).Moreover,the morphological and genetic characteristics of BTBB individuals were investigated;BTBB was similar to BSB in appearance but had a higher body height than *** study results regarding chromosome numbers and DNA content indicated that BTBB is a diploid hybrid *** 5S rDNA and Hox gene of BTBB were inherited from the original *** development in BTBB was *** the other hand,BTBB had a faster growth rate,higher muscle protein level,and lower muscle carbohydrate level than ***,bisexual fertile BTBB is promoted and can be applied as a high-quality fish,and it can also be used as a new fish germplasm resource to develop high-quality fish ***,this study is of great significance for fish genetic breeding.

关键词： distant hybridization Megalobrama amblycephala backcrossing improved germplasm resources

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Syntheses, Crystallographic and Magnetic Properties of Nd_3Fe_(29-x)Cr_x and Other Associated Compounds

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Journal of Materials Science & Technology 2000年第3期16卷 261-268页

作者： Xiufeng HAN and Terunobu Miyazaki (Department of Applied Physics, Faculty of Engineering, Tohoku University, Sendai 980-77, Japan) Qiyuan wang, Jun wang, yude ZAN and Lanying LIN (Material Science Center, Institute of Semiconductors, Chinese Academy of Sc Department of Applied Physics Faculty of Engineering Tohoku University Sendai 980-77 Japan Material Science Center Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

A systematic study of syntheses and magnetic properties of the Nd_3Fe_(29-x)Cr_x (x=4.5, 4.7, 5.0, and 5.5) compounds has been performed. The single-phase compounds of Nd_3Fe_(29-x)Cr_x can be formed in the range 4.5≤ x ≤ 5.5. The Curie temperature T_C, the saturation magnetization M_s at 4.2 K, the anisotropy field H_A at 4.2 K and room temperature. and the intra-sublattice exchange coupling parameter j_(FeFe) at 4.2 K for the Nd_3Fe_(29-x)Cr_x compounds decrease with increasing Cr composition from x=4.5 to 5.5, respectively. Nitrogenation and carbonation, unlike hydrogenation. result mainly in improvements of the Curie temperature, the saturation magnetization and the anisotropy field at 4.2 K and room temperature for the Nd_3Fe_(29-x)Cr_x compounds compared with their parent compounds.

关键词： Fe Crystallographic and Magnetic Properties of Nd3Fe x)Cr_x and Other Associated Compounds Syntheses Nd

基于Contourlet变换和Hu不变矩的图像检索算法

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红外与激光工程 2014年第1期43卷 306-310页

作者：杨舒王玉德曲阜师范大学物理工程学院山东曲阜273165

文章提出一种基于Contourlet变换和Hu不变矩的图像检索算法。首先,对每幅图像进行Contourlet变换,得到低频子带与高频方向子带,把计算得到的低频子带的Hu不变矩和各个高频方向子带的均值与标准差作为图像的特征向量,利用Manhattan距离... 详细信息

文章提出一种基于Contourlet变换和Hu不变矩的图像检索算法。首先,对每幅图像进行Contourlet变换,得到低频子带与高频方向子带,把计算得到的低频子带的Hu不变矩和各个高频方向子带的均值与标准差作为图像的特征向量,利用Manhattan距离进行相似度度量,完成基于内容的图像检索。为对该文提出的算法的检索效果进行检验,分别与基于Contourlet变换特征的检索算法和基于Hu不变矩特征的检索算法等方法进行了对比实验研究。结果表明,该算法有效地融合了图像的纹理特征与低频子带的形状特征,较好地实现了基于内容的图像检索,平均查准率达到73.94%。

关键词：图像检索 Contourlet变换 Hu矩均值和标准差 Manhattan距离

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复杂背景下甜瓜果实分割算法

农业工程学报 2014年第2期30卷 176-181页

作者：王玉德张学志曲阜师范大学物理工程学院曲阜273165

为解决复杂背景下甜瓜果实与背景图像分割的问题,该文提出了一种融合颜色特征和纹理特征的图像分割算法。首先,把采集到的甜瓜果实图像从RGB色彩空间分别转换到CIELAB和HSV色彩空间,应用a*b*分量建立角度模型,根据甜瓜果实的颜色特点选... 详细信息

为解决复杂背景下甜瓜果实与背景图像分割的问题,该文提出了一种融合颜色特征和纹理特征的图像分割算法。首先,把采集到的甜瓜果实图像从RGB色彩空间分别转换到CIELAB和HSV色彩空间,应用a*b*分量建立角度模型,根据甜瓜果实的颜色特点选取阈值并对图像作二值化处理;为降低光照分布不均匀对图像分割的影响,采用HSV空间的HS颜色分量对果实图像进行阈值分割。在以上2种色彩空间分割的基础上,融合角度模型分割和HS阈值分割的结果,得到基于颜色特征的分割结果。然后,再按照图像的纹理特征对图像进行分割处理,融合按照颜色特征和纹理特征的分割结果。最后,为解决分割结果中的分割误差和边缘毛刺问题,以颜色特征分割的果实区域为限定条件,对按照融合特征分割的果实区域进行约束性区域生长,得到最终的图像分割结果。为了对该文提出算法的分割效果进行检验,采用超绿阈值分割算法和归一化差异指数算法(NDI)对试验图像进行分割,3种算法的平均检出率分别为83.24%、43.12%、99.09%。对比3种分割算法的检出率和误检率,可以看出,该文提出的算法试验结果明显优于超绿阈值分割算法和归一化差异指数(NDI)分割算法。

关键词：水果图像分割图像融合特征提取约束区域生长

也谈研究生论文的选题原则——兼论研究生论文与本科生论文的区别

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学位与研究生教育 2006年第10期 36-38页

作者：王玉德华中师范大学历史文化学院

把本科生论文与研究生论文进行比较,认为研究生论文选题除了通常的论文选题要求之外,还应当从研究生的角度提出具体的原则,如专业性原则、深度性原则、规范性原则、成果性原则、持续性原则、道德性原则。

关键词：研究生学术论文选题原则