Nanolithographic self-assembly of colloidal nanoparticles

Technical Physics Letters - Methods of nanolithographic self-assembly of colloidal nanoparticles have been created, which are promising for the development of fractal nanolithography.     

Photosensitivity of a-Si:H/n-InSe heterocontacts

Rectifying photosensitive structures were obtained for the first time by bringing the surfaces of thin films of amorphous hydrogenated silicon deposited onto the silica-glass substrates into direct optical contact with the InSe natural-cleavage surface. Spectral dependences of the quantum efficiency of the obtained heterocontacts were studied, and the prospects for the use of the new a-Si:H/n-InSe heterocontacts in solar cells were assessed.     

Chemical Binding of Carbon Dioxide on Zinc Oxide Powders Prepared by Mechanical Milling

Inorganic Materials - Based on X-ray photoelectron spectroscopy and X-ray diffraction data for zinc oxide powders prepared via mechanical milling in an attritor, we have identified inherent...     

Photoluminescence at the fundamental absorption edge of single-crystal silicon textured without masking

The extraction efficiencies of edge luminescence from single-crystal silicon have been compared for three structures: textured without masking, untextured, and textured with masking by the technology of high-efficiency solar cells. The highest efficiency was obtained for the structure textured without masking. For this structure, the efficiency of power conversion at a wavelength of ~0.66 μm and power of 75 mW into edge PL power emerging from the semiconductor was η ≈ 0.8% under the nonradiative recombination conditions described by the exponential photoluminescence (PL) decay time constant of ~0.11 ms. The directivity diagrams of the edge PL were measured for the three structures under study.     

Perovskite Photovoltaic Cell with Hole Transport Layer Based on a Polyaniline Complex

Technical Physics Letters - Perovskite solar cells with photoactive layer of methylammonium lead iodide and hole transport layer based on a polyaniline complex with...     

The Effect of Base Thickness on Photoconversion Efficiency in Textured Silicon-Based Solar Cells

A theory is developed, which describes the experimental external quantum efficiency, EQE(λ) as a function of photon wavelength for structured Si-based solar cells. Short-circuit current density as a function of base thickness, d, is calculated for the high-efficiency solar cells with the photoconversion efficiency η ≥ 25% The procedure allows one to carry out a complete optimization of such solar cells, in particular, to find the optimal base thickness, d_opt.     

Portable power source based on air-hydrogen fuel cells with free-breathing cathodes

Portable power source based on air-hydrogen fuel cells (FCs) operating in a free-breathing cathode regime has been developed. At a volume of 100 cm³, the source has a power capacity of 8.5 W h and generates a power of 2 W that is independent of the temperature within 5–40°C and the relative humidity of the ambient air within 40–98%. With respect to the specific energy characteristics, the proposed PTI type device exceeds other air-hydrogen FCs and in some respects is even superior to power sources based on air-methanol FCs.