This was achieved in [ 47] and [ 48], using alumina and block-printing ink.
A physical model describing the charge transport in nitride and high-κ stacks is also presented, which allows gaining further insights into reliability issues related to charge localization and high-κ tunnel and blocking dielectrics, like the effects of the blocking alumina layer and the band-gap engineered tunnel dielectrics on the TANOS device retention.
Hence, protection of the TERS probes with an ultrathin insulating layer such as alumina can minimise or block such tip-sample interaction while still maintaining the plasmonic enhancement at the tip-apex allowing accurate measurement of the intrinsic local vibrational and excitonic properties of such 2-D materials.
Tan KW, Moore DT, Saliba M, Sai H, Estroff LA, Hanrath T, Snaith HJ, Wiesner U, "Thermally Induced Structural Evolution and Performance of Mesoporous Block Copolymer-Directed Alumina Perovskite Solar Cells," ACS Nano 8 5), 4730-4739 (2014).
In this work we employed in situ time-resolved grazing incidence wide-angle X-ray scattering (GIWAXS) to probe the structure of methylammonium lead tri-iodide/chloride (CH3NH3PbI3– x Cl x ) perovskites in mesoporous block copolymer-directed alumina (MBCP-Al2O3) during thermal annealing.
Here, we utilize in situ grazing incidence wide-angle X-ray scattering and scanning electron microscopy to investigate the structural evolution and film morphologies of methylammonium lead tri-iodide/chloride (CH3NH3PbI3– x Cl x ) in mesoporous block copolymer derived alumina superstructures during thermal annealing.
Mesoporous block copolymer-directed alumina (MBCP-Al2O3MBCP-Al2O3ms with interconnected porosity are generated when the organic components are removed by calcination as evidenced by the scanning electron microscopy (SEM) and atomic force microscopy (AFM) images in Figures 2 and S1 (Supporting Information), respectively.
Finally, we demonstrated by annealing the MBCP-Al2O3 perovskite films with a well-controlled temperature ramp in a dry environment that the perovskite capping film coverage and the power conversion efficiency of block copolymer-directed alumina perovskite solar cells can be greatly improved.
The effect of the boundary conditions has been experimentally quantified by performing indentation tests on structures built with cubic blocks made of alumina.
Stochastic reconstruction models have been employed to generate three-dimensional structures of porous alumina synthesized via sol gel, using poly(oxyethylene) block polymers as directing agents.
