守护明天“未”爱前行——三原县池阳小学开展关爱未成年人主题教育活动

为全面贯彻《中华人民共和国未成年人保护法》,进一步加强对未成年人的关爱力度,增强孩子们知法、懂法、学法、守法的法治意识,近日池阳小学的优秀学生代表以及部分“五类”学生前往“三原县未成年人救护中心”开展了“守护明天‘未’爱前行”的主题教育活动。本次活动首先进行了揭牌仪式,确定该基地为三原县池阳小学“未成年人思想道德建设教育实践基地”,其次通过参观场所、法治专题教育、绘画说法等互动活动环节,一是让孩子们深切的感受到来自社会各界的关注。二是对未成年人保护法有了一个深刻的认识和学习。三是引导孩子们从现在开始、从小开始力争做一名遵纪守法的优秀小公民。

李清照晚年再嫁悲剧——从易安居士与池阳有关的人和事说起

生活在两宋之际动荡年代的一代词宗李清照,是一位经历坎坷极具争议的非凡女子。千年以来研究李清照的学者如云成果丰硕。在前人研究成果的基础上,从李清照与古池阳这一特定地域时空,联系她连遭夫君暴亡、晚年再嫁、百日离异的人生悲剧作深入、具体的考证和探讨获得了一些新的发现,为进一步研究李清照坎坷人生和古池阳(池州)这一地域文化提供一些新的视角、新的史料和新的线索,以正某些差误。

为什么石油资源分布贫富会如此悬殊——访石油地质学家、西北大学地质学系刘池阳教授

石油是当今世界上最重要的不可再生化石能源之一。目前国内外油气勘探、发现和开采的实践揭示了一个令人迷惑不解的现象——在全球的不同空间尺度,石油资源分布的贫富差距极为悬殊。为进一步了解和解答这方面的问题,我特意采访了含油气盆地和石油地质学家——西北大学地质学系刘池阳教授。

池阳宫灯的前世今生

2023岁暮的上海艺术品拍卖市场,上海工美“海上世家”拍卖专场中的“西汉池阳宫铜行灯”成为关注的聚焦点。池阳宫铜行灯,汉宣帝甘露四年造,扁圆形,附三蹄足,侧有长柄,通高7.9厘米,直径11厘米,柄长13厘米,足高3.8厘米,铜灯外壁上团刻铭文十四行二十九字:“池阳宫铜行灯,重二斤六两,甘露四年工虞德造,守属阳,澂邑丞圣,佐博临”,一足底下刻一“莊”字,皆为小篆文字,字体方正,如秦诏版之风格,凿刻坚挺有力,极富美感。

盏池阳宫灯,半部金石逸史

乾嘉以降,关于古灯具的传拓,是金石名家极风雅之事。如僧六舟为“竟宁雁足灯”作全形拓,亦作《剔灯图》,诸家又题跋咏唱,饱有文人意趣。高等级的古灯多沥有“铭文”,详细记载器物名称、重量、尺寸、制作时间及监造信息等,对于考古学、金石学、文字学等意义甚大。其样式亦颇多,除雁足灯外,另有桂宫行灯、池阳宫灯、长信宫灯、平阳家灯、开封行灯、宜子孙行灯等,亦是制作精巧,造型丰富,殊堪玩味。

Construction of a broadband impedance spectrum and synchronous DC voltammetry measurement system for solar cells

The current impedance spectroscopy measurement techniques face difficulties in diagnosing solar cell faults due to issues such as cost,complexity,and accuracy.Therefore,a novel system was developed for precise broadband impedance spectrum measurement of solar cells,which was composed of an oscilloscope,a signal generator,and a sampling resistor.The results demonstrate concurrent accurate measurement of the impedance spectrum(50 Hz-0.1 MHz)and direct current voltametric characteristics.Comparative analysis with Keithley 2450 data yields a global relative error of approximately 6.70%,affirming the accuracy.Among excitation signals(sine,square,triangle,pulse waves),sine wave input yields the most accurate data,with a root mean square error of approximately 13.3016 and a global relative error of approximately 4.25%compared to theoretical data.Elevating reference resistance expands the half circle in the impedance spectrum.Proximity of reference resistance to that of the solar cell enhances the accuracy by mitigating line resistance influence.Measurement error is lower in high-frequency regions due to a higher signal-to-noise ratio.

Effect of substrate temperature and oxygen plasma treatment on the properties of magnetron-sputtered CdS for solar cell applications

Cadmium sulfide(CdS)is an n-type semiconductor with excellent electrical conductivity that is widely used as an electron transport material(ETM)in solar cells.At present,numerous methods for preparing CdS thin films have emerged,among which magnetron sputtering(MS)is one of the most commonly used vacuum techniques.For this type of technique,the substrate temperature is one of the key deposition parameters that affects the interfacial properties between the target film and substrate,determining the specific growth habits of the films.Herein,the effect of substrate temperature on the microstructure and electrical properties of magnetron-sputtered CdS(MS-CdS)films was studied and applied for the first time in hydrothermally deposited antimony selenosulfide(Sb_(2)(S,Se)_(3))solar cells.Adjusting the substrate temperature not only results in the design of the flat and dense film with enhanced crystallinity but also leads to the formation of an energy level arrangement with a Sb_(2)(S,Se)_(3)layer that is more favorable for electron transfer.In addition,we developed an oxygen plasma treatment for CdS,reducing the parasitic absorption of the device and resulting in an increase in the short-circuit current density of the solar cell.This study demonstrates the feasibility of MS-CdS in the fabrication of hydrothermal Sb_(2)(S,Se)_(3)solar cells and provides interface optimization strategies to improve device performance.

宋池阳郡斋本文选鉴赏

国家图书馆藏有宋淳熙八年(1181)池阳郡斋刻本(以下简称"淳熙本",即习称的尤袤本)李善注《文选》3部,其中两部分别为陈清华郇斋和瞿氏铁琴铜剑楼旧藏,存世尚有其它诸部印本。兹以陈清华郇斋藏本为例(图1),行款版式为10行18至21字不等,小字双行19至22字不等,白口,左右双边,单鱼尾。版心上镌本版字数,中镌"文"和卷次及叶次,下镌刻工。卷端题"文选卷第一",次行低两格题"梁昭明太子撰"。

Electrochemical properties of magnesium alloy anodes discharged in seawater

Magnesium alloys can be developed as anode materials for seawater activated batteries. The electrochemical properties of AZ31, AP65 and Mg-3%Ga-2%Hg alloy anodes discharged in seawater were studied. The potentiodynamic polarization shows that the Mg-3%Ga-2%Hg alloy provides more negative corrosion potentials than AZ31 or AP65 alloy. The galvanostatic discharge results show that the Mg-3%Ga-2%Hg alloy exhibits good electrochemical properties as anodes in seawater. And the EIS studies reveal that the magnesium alloy anode/seawater interfacial process is determined by an activation controlled reaction. The Mg3Hg and Mg21Ga5Hg3 phases in Mg-3%Ga-2%Hg alloy improve its electrochemical properties better than the Mg17（Al,Zn）12 phase in AZ31 and Mg（Pb） solid solution phase in AP65 alloys.

Preparation, microstructure and dislocation of solar-grade multicrystalline silicon by directional solidification from metallurgical-grade silicon

A vacuum directional solidification with high temperature gradient was performed to prepare low cost solar-grade multicrystalline silicon （mc-Si） directly from metallurgical-grade mc-Si. The microstructure characteristic, grain size, boundary, solid-liquid growth interface, and dislocation structure under different growth conditions were studied. The results show that directionally solidified multicrystalline silicon rods with high density and orientation can be obtained when the solidification rate is below 60 μm/s. The grain size gradually decreases with increasing the solidification rate. The control of obtaining planar solid-liquid interface at high temperature gradient is effective to produce well-aligned columnar grains along the solidification direction. The growth step and twin boundaries are preferred to form in the microstructure due to the faceted growth characteristic of mc-Si. The dislocation distribution is inhomogeneous within crystals and the dislocation density increases with the increase of solidification rate. Furthermore, the crystal growth behavior and dislocation formation mechanism of mc-Si were discussed.

Influence of dye molecular structure on electron transfer in 2,9,16,23-tetracarboxy zinc phthalocyanine sensitized solar cell

2, 9, 16, 23-tetracarboxy zinc phthalocyanine （ZnTCPc） is synthesized and characterized by physicochemical and theoretical methods and it is used as a photosensitizer in dye-sensitized solar cells （DSSC）. The excited lifetime, band gap and frontier orbital distribution of ZnTCPc are investigated by fluorescence spectra, cyclic voltammetry and quantum calculation. The results show that the excited lifetime and band gap are 0. 1 ns and 1.81 eV, respectively. Moreover, it is found that the highest occupied molecular orbital （HOMO） location is not shared by both the zinc metal and the isoindoline ligands, and the lowest unoccupied molecular orbital（LUMO） location does not strengthen the interaction coupling between ZnTCPc and TiO：. As a result, the ZnTCPc-DSSC gains a short-circuit current density of 0. 147 mA/cm2, an open-circuit photovoltage of 277 mV, a fill factor of 0. 51 and an overall conversion efficiency of 0. 021%.

Effect of KOH treatment on structural and photovoltaic properties of ZnO nanorod arrays

ZnO nanorod arrays （NRs） were synthesized on the fluorine-doped SnO2 transparent conductive glass （FTO） by a simple chemical bath deposition （CBD） method combined with alkali-etched method in potassium hydroxide （KOH） solution. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and current-voltage （I-V） curve were used to characterize the structure, morphologies and optoelectronic properties. The results demonstrated that ZnO NRs had wurtzite structures, the morphologies and photovoltaic properties of ZnO NRs were closely related to the concentration of KOH and etching time, well-aligned and uniformly distributed ZnO NRs were obtained after etching with 0.1 mol/L KOH for 1 h. ZnO NRs treated by KOH had been proved to have superior photovoltaic properties compared with high density ZnO NRs. When using ZnO NRs etched with 0.1 mol/L KOH for 1 h as the anode of solar cell, the conversion efficiency, short circuit current and open circuit voltage, compared with the unetched ZnO NRs, increased by 0.71%, 2.79 mA and 0.03 V, respectively.

Electricity generation during wastewater treatment by a microbial fuel cell coupled with constructed wetland

A membrane-less constructed wetland microbial fuel cell （CW-MFC） is constructed and operated under continuous flow with a hydraulic retention time （HRT） of 2 d. Fed with glucose, the CW-MFC generates a stable current density of over 2 A/m3 with a resistor of 1 kΩ and has a chemical oxygen demand （COD） removal efficiency of more than 90% after the startup of 2 to 3 d. A series of systems with the electrode spacings of 10, 20, 30 and 40 cm are compared. It is found that the container with the electrode spacing of 20 cm gains the highest voltage of 560 mV, the highest power density of 0. 149 W/m 3, and the highest Coulombic efficiency of 0.313%. It also has the highest COD removal efficiency of 94. 9%. In addition, the dissolved oxygen （DO） concentrations are observed as the lowest level in the middle of all the CW-MFC reactors. The results show that the more COD is removed, the greater power is generated, and the relatively higher Coulombic efficiency will be achieved. The present study indicates that the CW-MFC process can be used as a cost-effective and environmentally friendly wastewater treatment with simultaneous power generation.

Doped-Chamber Deposition of Intrinsic Microcrystalline Silicon Thin Films and Its Application in Solar Cells

A series of microcrystalline silicon thin films were fabricated by very high frequency plasma enhanced chemical vapor deposition （VHF-PECVD） at different silane concentrations in a P chamber. Through analysis of the structural and electrical properties of these materials,we conclude that the photosensitivity slightly decreased then increased as the silane concentration increased,while the crystalline volume fraction indicates the opposite change. Results of XRD indicate that thin films have a （220） preferable orientation under certain conditions. Microcrystalline silicon solar cells with conversion efficiency 4. 7% and micromorph tandem solar cells 8.5% were fabricated by VHF-PECVD （p layer and i layer of microcrystalline silicon solar cells were deposited in P chamber）, respectively.

一封司法局的来信

3月7日,池州石油收到一封来至江苏苏州市司法局的信函,揭开了池阳加油站春节期间做好事不留名、不为人知的故事。加油员谢华和站长纪漫星将拣到的一部三星I9220手机通过快递邮寄给失主,他们拾物不昧、助人为乐、不图回报的美德赢得了省外客户的高度赞誉。

Proton Irradiation and Thermal Annealing of GaAs Solar Cells

The investigation on proton irradiation and thermal annealing of AlGaAs/GaAs solar cells has been reported.The energy of the proton irradiation is 325keV and the fluences are ranging from 5×10 10 to 1×10 13 cm -2 .It is demonstrated that the irradiation-induced degradation in the photovoltaic performance of the solar cells exists mainly in the short circuit current and the irradiation damage can be partly recovered by low temperature annealing at 200℃.In addition,it is found that the borosilicate cover glass has an obvious protection effect against the proton irradiation.