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Photon-Management in Dünnschicht-Solarzellen

Stephan rer. nat. Fahr2012-02-15Common Library Network (Der Gemeinsame Bibliotheksverbund)

In dieser Arbeit wurden Maßnahmen vorgestellt, die die Ausbreitung des einfallenden Lichtes innerhalb von Dünnschichtsolarzellen derart modifizieren, dass dadurch deren Wirkungsgrad gesteigert wird. Die Stärke der vorgestellten numerischen Untersuchungen liegt dabei in der rigorosen Lösung der Maxwellschen Gleichungen…

Thin-Film Transistor TechnologiesSilicon and Solar Cell TechnologiesSilicon Nanostructures and Photoluminescence

REVIEW ON COMPUTATIONAL EXPLOSION MECHANICS

Ning Jianguo、Wang Meng2012-02-15Lixue yu shijian

Exact solution of explosion problem cannot be achieved in most cases because of its strong nonlinearity. And data gained from experiments are very limited because explosion is a strong physical course finished in short duration.Simulation of explosion mechanics and related research has greatly promoted rapid developme…

High-Velocity Impact and Material BehaviorStructural Response to Dynamic LoadsElectromagnetic Launch and Propulsion Technology

Mn对异丁烯选择氧化制甲基丙烯醛Mo-Bi-Fe-Co-Cs-K复合氧化物催化剂的促进作用及其机理

赖群萍、伊晓东、华卫琦 等 5 位作者2012-02-15分子催化

采用共沉淀法制备了系列异丁烯选择氧化制甲基丙烯醛(MAL)Mo-Bi基复合氧化物催化剂,在常压固定床流动反应体系上考察了Mn助剂及其添加方式对催化剂性能的影响,并结合对相关催化剂物相结构的表征,探讨了Mn的作用机理.研究表明,以Mn(NO3)2为前驱体将Mn引入Mo-Bi-Fe-Co-Cs-K复合氧化物可显著提高催化剂的异丁烯转化率,催化剂活性的改善源于Mn加入后有助于生成更多Bi3FeMo2O12物相,但该物相的增多对催化剂MAL选择性的影响不大.以MnMoO4为前驱体引入Mn可以进一步改善催化剂的性能,在400℃,空气∶异丁烯=10∶1(体积比)和GHSV=2 000 mL.g-1.h-1的反应条件下,异丁烯的转化率可达92.…

Polyoxometalates: Synthesis and ApplicationsCatalysis and Hydrodesulfurization StudiesChemical Synthesis and Reactions

Effects of slag and fly ash in concrete in chloride environment

R.B. Polder2012-02-15Research Repository (Delft University of Technology)

This paper addresses experience from The Netherlands with blast furnace slag and fly ash in concrete in chloride contaminated environments, both from the field and the laboratory. Use of slag produced in The Netherlands started in the 1930s and CEM III/B LH HS, with typically 70% slag, became the dominant cement type…

Concrete and Cement Materials ResearchConcrete Corrosion and DurabilityMagnesium Oxide Properties and Applications