High-performance bifacial perovskite solar cells enabled by single-walled carbon nanotubes.

Bifacial perovskite solar cells have shown great promise for increasing power output by capturing light from both sides. However, the suboptimal optical transmittance of back metal electrodes together with the complex fabrication process associated with front transparent conducting oxides have hindered the development of efficient bifacial PSCs. Here, we present a novel approach for bifacial perovskite devices using single-walled carbon nanotubes as both front and back electrodes.

Interfacial Chemical Bridging Constructed by Multifunctional Lewis Acid for Carbon Nanotube/Silicon Heterojunction Solar Cells with an Efficiency Approaching 17.7.

Single-wall carbon nanotube/silicon (SWCNT/Si) heterojunction shows appealing potential for use in photovoltaic devices. However, the relatively low conductivity of SWCNT network and interfacial recombination of carriers have limited their photovoltaic performance. Herein, a multifunctional Lewis acid (p-toluenesulfonic acid, TsOH) is used to significantly reduce the energy loss in SWCNT/Si solar cells.

Fermi-Level Depinning in Metal/Ge Junctions by Inserting a Carbon Nanotube Layer.

Germanium (Ge)-based devices are recognized as one of the most promising next-generation technologies for extending Moore's law. However, one of the critical issues is Fermi-level pinning (FLP) at the metal/n-Ge interface, and the resulting large contact resistance seriously degrades their performance. The insertion of a thin layer is one main technique for FLP modulation; however, the contact resistance is still limited by the remaining barrier height and the resistance induced by the insertion layer.

[Oxidation stress and toxicity of TBBPA pollution on polychaete tubifex (Monopylephorus limosus)].

Using the indoor simulating method of dynamic and static exposure respectively, the toxic effects of TBBPA on the antioxidant enzyme defense systems and Glutathione-S-transferase (GST) activity of tubifex Monopylephorus limosus were examined. The activity of superoxide dismutase (SOD) and catalase (CAT) with time was also examined. The results showed that after an 8 d exposure, the SOD activity was enhanced at first and then inhibited gradually, at last enhanced again.

[Researching progresses in environmental pollution behavior, toxic effects and mechanisms of PFOS/PFOA].

It has been validated that perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) can be considered as emerging persistent organic pollutants. In recent years, there are increasing distribution of PFOS/PFOA in environmental systems, and accumulation and toxic effects of PFOS/PFOA in living organisms. Thus, environmental pollution and biological exposure of PFOS/PFOA were firstly analyzed on the basis of their pollution levels, exposure to wild animals, exposure to human bodies, and changing trends in pollution and exposure.