Performance Enhancement in Powder-Fabricated Cu(ZnSn)Se Solar Cell by Roll Compression.

Despite the improved conversion efficiency of Cu(ZnSn)Se (CZTSe) solar cells, their roll-to-roll fabrication nonetheless leads to low performance. The selenization time and temperature are typically considered major parameters for a powder-based CZTSe film; meanwhile, the importance of the densification during the roll-to-roll process is often overlooked. The densification process is related to the porosity of the light-absorbing layer, where high porosity lowers cell performance.

Centrifugal microfluidic device for the high-throughput synthesis of Pd@AuPt core-shell nanoparticles to evaluate the performance of hydrogen peroxide generation.

We propose a novel high-throughput screening platform using a centrifugal microfluidic device for producing combinatorial tri-metallic catalysts. The centrifugal device was designed to perform 60 reactions under different conditions on a single device. As a model to search for an optimal tri-metallic catalyst, we synthesized a variety of Pd@AuPt nanoparticles (NPs), in which Pd nanocubes served as a core, and Au and Pt atoms formed a shell.

Strategies for the modification of adhesion at graphene/Al Interfaces: a first principles study.

Possibility of improving the adhesion at graphene/Al interfaces has been investigated by predicting interactions between monolayer graphene and Al (111) plane using first principles simulations. For the property modifications, either Ni atoms were adsorbed on one side of the graphene or the graphene is substitutionally doped with B. It was predicted that the adatoms or dopants modify local electronic or orbital structure, which subsequently promotes the bonding between the graphene and Al at local level thereby improving the bond strength at the interface.