Tailoring Femtosecond?Laser Processed Black Silicon for Reduced Carrier Recombination Combined with >95% Above?Bandgap Absorption

Picosecond carrier recombination dynamics in chalcogen-hyperdoped silicon

silicon Meng-Ju Sher, Christie B. Simmons, Jacob J. Krich, Austin J. Akey, Mark T. Winkler, Daniel Recht, Tonio Buonassisi, Michael J. Aziz, and Aaron M. Lindenberg Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 0213...

Near-infrared free carrier absorption in heavily doped silicon

Reduced Carrier Recombination in PbS - CuInS2 Quantum Dot Solar Cells

Energy loss due to carrier recombination is among the major factors limiting the performance of TiO2/PbS colloidal quantum dot (QD) heterojunction solar cells. In this work, enhanced photocurrent is achieved by incorporating another type of hole-transporting QDs, Zn-doped CuInS2 (Zn-CIS) QDs into the PbS QD matrix. Binary QD solar cells exhibit a reduced charge recombination associated with the...

Carbon black-intercalated reduced graphene oxide electrode with graphene oxide separator for high-performance supercapacitor

We present a general study on a high performance supercapacitor based on intercalated reduced graphene oxide with carbon black nanoparticles. Graphene oxide sheets were synthesized by oxidation and exfoliation of natural graphite and were reduced using hydroiodic acid in the presence of carbon black nanoparticles. Graphene paper was fabricated by one-step procedure via simultaneous reducing and...

Silicon-Processed Microneedles

A combination of surfaceand bulk-micromachining techniques is used to demonstrate the feasibility of fabricating microhypodermic needles. These microneedles, which may be built with on-board fluid pumps, have potential applications in the chemical and biomedical fields for localized chemical analysis, programmable drug-delivery systems, and very small, precise sampling of fluids. The microneedl...