Flexible CuInSe₂ Nanocrystal Solar Cells on Paper

Solar cells on paper have the potential to be inexpensive and portable due to several unique features of the substrate: paper is cheap, flexible, lightweight, biodegradable, and manufactured by roll-to-roll processing. Here, we report the first nanocrystal photovoltaic devices (PVs) made on paper. Using spray-deposited CuInSe₂ nanocrystals as the absorber material on substrates composed of bacterial cellulose nanofibers synthesized by the microorganism <i>Gluconacetobacter hansenii</i>, these devices demonstrate exceptional electrical and mechanical integrity. There is no significant loss in PV device performance after more than 100 flexes to 5 mm radius, and the devices continue to perform when folded into a crease. The practical use of these paper PVs is demonstrated with a prototype device powering liquid crystal displays (LCDs) mounted to various kinds of surfaces

Wnt signalling requires MTM-6 and MTM-9 myotubularin lipid-phosphatase function in Wnt-producing cells

This paper identifies the myotubularin lipid-phosphatases MTM-6/9 to be important for MIG-14/Wntless recycling, establishing them as novel and essential components for Wnt signalling