We applied the reduced graphene oxide/multi-walled carbon nanotubes/nickel oxide(RGO/MWCNTs/Ni O)nanocomposite as the counter electrode(CE) in dye-sensitized solar cells(DSSCs) on fluorine-doped tin oxide substrates by blade doctor method. Power conversion efficiency(PCE) of 8.13 % was achieved for this DSSCs device, which is higher than that of DSSCs devices using Ni O, RGO, and RGO/Ni O-CE(PCE = 2.71 %, PCE = 6.77 % and PCE = 7.63 %). Also, the fill factor of the DSSCs devices using the RGO/MWCNTs/Ni O-CE was better than that of other CEs. The electron transfer measurement of cyclic voltammetry and electrochemical impedance spectroscopy showed that RGO/MWCNTs/Ni O film could provide fast electron transfer between the CE and the electrolyte, and high electrocatalytic activity for the reduction of triiodide in a CE based on RGO/MWCNTs/Ni O in a DSSC.
Cu 2 O nanocrystallines (NC ) 直接被观察由在 situ 高分辨率的传播电子显微镜学。一个二阶段的氧化过程被观察：(1 ) 起始的氧化阶段被 Cu 2 经由稳固固体的转变的 O NC，导致一个新中间的 CuO x 阶段的形成。CuO x 阶段的可能的水晶结构被讨论。(2 ) 随后， CuO x 被 layer-by-layer 氧化转变成 CuO。这些结果将在理解铜氧化物的氧化机制帮助并且为改进他们的结构的差异并且利用他们的潜在的工业应用铺平道路。
Organolead trihalide perovskite materials have been attracting increasing attention due to their promising role in solid solar cells. Several advantages make them potential candidates for optoelectronics:(1) solution- or/and vapor-processed preparation at low temperature;(2) tunable optical bandgap, wide absorption spectrum but narrow photoluminescence peaks;(3) long car-rier life time, large diffusion length and high charge mobility;(4) various nanostructures via tuning capping agents and sol-vents. In this review, we summarize recent attempts toward efficient LEDs based on organolead trihalide perovskite materials. The strategies of materials science, device design and interface engineering are highlighted. Recent development and future perspectives are summarized for practical perovskite light technologies.
Ming PengWen WenSi ChenBuxin ChenKai YanHsienwei HuBin DongXue GaoXiao YuXiaoming JiangDechun Zou
