Electron transport properties of TiO_2 shell on Al_2O_3 core in dye-sensitized solar cells

The performance of dye-sensitized solar cells （DSSCs） is strongly affected by the properties of semiconductor nanoparticles. In this work, we used TiO2 particles prepared by TiC14 hydrolysis n times on A1203 films （A/T（n））, and investigated morphology, photoelectric, and electron transport properties of A/T（n）. The TiO2 shell was composed of 10-20 nm nanoparticles and the number of nanoparticles increased with increasing TIC14 treatment times. The highest photoelectric conversion efficiency of 3.23% was obtained as A/T（4）. IMPS results indicated that electron transport rate was high enough to conduct current, and was not the dominating effect to limit the Jsc. Jsc was mainly determined by dye loading on TiO2 and the interconnection of TiO2. These may provide a new strategy for preparing semiconductor working electrodes for DSSC.

空间站核心舱太阳翼在轨维修地面验证技术研究

核心舱太阳翼在轨顺利展开且工作良好是我国空间站长期在轨飞行的基础。为在地面充分验证核心舱太阳翼在轨出现故障后,航天员在轨维修排除故障方案的合理性,对航天员出舱维修姿态进行仿真,研究在轨维修地面验证技术。通过地面操作试验验证仿真姿态,确认各项操作符合可视、可达、可操作要求,为我国后续飞行器太阳翼的在轨维修地面验证奠定基础。

空间站核心舱太阳翼火工品故障的维修方法

根据载人航天三步走的发展战略,我国将建造长期有人驻留的空间站。电源系统是空间站长期运行的能源保障,核心舱太阳翼的顺利展开是电源系统长期运行的基础。太阳翼火工品解锁故障会导致核心舱太阳翼无法展开,严重影响核心舱后续飞行任务。为确保核心舱太阳翼在火工品解锁故障条件下依然能展开到位,根据太阳翼火工品设计状态,开展了火工品解锁故障条件下的维修工具和维修流程研究,设计并制定航天员出舱检测和排除故障方案,为我国维修后续载人飞行器太阳翼技术奠定了基础。