Design of color tunable thin film polymer solar cells for photovoltaics printing

Color tunable thin film polymer solar cells have demonstrated the potentials of a wide applications in photovoltaics printing, which is significant for ink pollution reduction and energy saving. This work presents a new effective approach to realize color-tuning photovoltaic cells with optical microcavity structures. Aluminum-doped zinc oxide is utilized as electron transport layer material. With its high electrical conductivity, the thickness tuning range can be quite large, which means the cavity length has a wide variation range. It thus provides sufficient space for optical thin film design to obtain multi colors. By the transfer matrix method, device reflection and absorption spectra are numerically investigated. Based on that, the optical principles for color tunability are explored. In further step, the relationship between device photovoltaics performance and reflective colors are also discussed. Finally, the color coordinates and luminosities are calculated. As results, the colors of the devices designed are capable to cover a relatively large region in Commission Internationale de l′Eclairage(CIE) 1931 x, y chromaticity diagram, which is available to be integrated into the advertisement poster boards, building wall printing and other display applications.     

策略路由技术在校园网中应用

高校对网络的应用越来越广泛,同时也要求有较好的传输性能。为了解决网络带宽和传输性能的瓶颈,高校选择了多个网络服务提供商(ISP)。利用策略路由技术实现了链路的负载均衡和容错,保证了网络的可靠性。     

域的基本配置及常见故障排除

随着网内用户的不断增多,如何有效地组织管理用户及计算机,同时又能让用户灵活、安全、方便的访问资源,是网络管理员需要思考的一个问题。域提供了一种不错的管理手段,通过域不仅方便管理员管理,同时也兼顾用户的便利性。主要阐述域的基本配置以及在配置过程中经常碰到的几个问题和解决方法。