Photovoltaic Cells Based on Semiconductor Quantum Dots/Nanorods (Nanotubes) Array

半导体量子点/半导体纳米棒（管）阵列光伏电池 我们社会的能源是以煤，石油和天然气为基础。工业材料杂志在2003年指出可供人类使用的石化燃料存量，石油约只可再使用40年，天然气约可再使用60年，而煤炭则可再使用200年，因而这些燃料在不久的将来即将消耗殆尽。随着社会的发展，人类对能源的需求越来越大。如果大量使用石化燃料，除了燃料会被耗尽以外，化石燃料在燃烧的过程中产生大量的二氧化碳，其浓度在大气中的快速增长已经影响到了气候，同时对人类的生存环境的影响也与日俱增。能源的短缺和环境恶化将成为人类即将面临的越来越突出的问题，寻找清洁和可再生的能源已成为世界共同关注的问题。光伏太阳能电池作为一种可...Photovoltaic Cells Based on Semiconductor Quantum Dots/Nanorods (Nanotubes) Array The energy of our society is based on coal, oil and natural gas. Industrial Materials mentioned in 2003 that the remaining amount of fossil fuels available to humans are as follows, oil for 40 years, natural gas 60 years, and for coal it is 200 years, thus we would run out of these fuels in the near future. With the...学位：工学硕士院系专业：化学化工学院化学系_应用化学学号：2052007115101

高负载硫正极功能性黏结剂研究进展

锂硫电池是高能量密度二次电池的重要体系.但硫材料固有的绝缘属性以及硫正极在电化学循环中特殊的"固-液-固"反应历程,易导致材料利用率低、极化严重、溶解性多硫化锂"穿梭"以及剧烈体积变化等负面影响,造成高负载硫正极性能发挥和稳定循环的极大困难.近年来,作为非活性组分的黏结剂在锂硫电池中被赋予了丰富的功能,如有效捕捉溶解性多硫化锂以及维持电极/导电结构长期循环稳定性等,极大地推动了高负载硫正极的发展.本文从高负载硫正极用黏结剂的关键作用、研究现状、作用机制原位解析、现存挑战以及未来发展方向等方面,重点归纳和阐述近年来高负载硫正极用功能性黏结剂的重要研究进展.国家自然科学基金(21875155,51872193,51675275)资

Preparation and Photoeletrochemical Performance of CdS Quantum Dot Sensitized ZnO Nanorod Array Electrodes

Corresponding author. Email: [email protected]; Tel: +86-592-2189663[中文文摘]采用连续式离子层吸附与反应法制备了CdS量子点敏化的ZnO纳米棒电极.应用扫描电子显微镜(SEM)、X射线衍射(XRD)和透射电子显微镜(TEM)对CdS量子点/ZnO纳米棒电极的形貌、晶型和颗粒尺寸进行了分析和表征;采用光电流-电位曲线和光电流谱研究了不同CdS循环沉积次数及不同沉积浓度对复合电极的光电性能影响.结果表明,前驱体浓度都为0.1mol·L-1且沉积15次敏化后的ZnO纳米棒阵列电极光电性能最好.与单纯的ZnO纳米棒阵列电极和单纯的CdS量子点电极相比,其光电转换效率显著提高,单色光光子-电流转换效率(IPCE)在380nm处达到76%.这是因为CdS量子点可以拓宽光的吸收到可见光区,并且在所形成的界面上光生载流子更容易分离.荧光光谱实验进一步说明了光电增强的原因是,两者间形成的界面中表面态大大减少,有利于减少光生电子和空穴的复合. [英文文摘]We sensitized CdS quantum dots on a ZnO nanorod array electrode by the successive ionic layer adsorption and reaction method.Scanning electron microscopy(SEM),X-ray diffraction(XRD),and transmission electron microscopy(TEM) experiments were performed to characterize the morphology,crystalline phase,and grain size of the CdS quantum dot sensitized ZnO nanorod array electrodes.The effect of CdS deposition cycle number and the precursor concentration were studied by photocurrent-potential characteristics and photocurrent spectra. The results showed that the best photoelectrochemical performance was obtained at 0.1 mol·L-1 for both Cd2+ and S2- after 15 cycles. Meanwhile, the composite films exhibited a remarkably enhanced photoelectric conversion efficiency compared with the ZnO nanorods array films and with CdS quantum dot electrodes. The monochromatic incident photon-toelectron conversion efficiency (IPCE) was as high as 76% at 380 nm. This may be attributed to the broad light harvesting capability of CdS and the efficient separation of photogenerated carriers on its interface. The reason for this enhancement was further confirmed by a photoluminescent experiment. The results showed that sensitization with CdS quantum dots reduced the recombination of electron and hole pairs resulting in an enhancement in the photocurrent.国家自然科学基金(20433040

东北鼢鼠种群动态及其预测预报

１９９１～１９９２年在泰来县东方红林场对鼢鼠种群季节消长进行了研究，在此基础上，采用有效基数法对种群数量的预测预报做了初步探讨

Workshop on Contemporary Chinese History (中国当代史研究工作坊)

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