Lateral multijunction photovoltaic cells

Abstract

Abstract. In this work, features of solar cells of lateral type were analyzed. The authors offered a design of a monolithic compact solar module with cells electrically connected in series and with a dispersion element (holographic grating). Simulation of a multistage converter was carried out. It has been shown that with increasing the number of cells n the maximum limited efficiency  increases. Its maximum values up to  ≈ 53.6% are reached for n = 15 (in the case of perfectly matched semiconductors and conditions AM0). With further increase of n , the efficiency decreases. For a set of concrete semiconductors  ≈ 45% the maximum efficiency for AM0 conditions may be achieved, when the number of cells equals 4. It has been shown that the calculation results agree with experimental data. The possibility of technical implementation of solar cells with using inkjet printers was investigated, too. Briefly discussed have been the properties of these printers, as well as metal, semiconductor and dielectric inks.

Luminescent converter of solar light into electrical energy. Review

“…Part of the photons is absorbed by absorption centers (4) of the plate and is emitted by the fluorescent centers (5). Each luminescent center radiates photons in all directions (6). If the absorption and luminescence spectra overlap, the fluorescent photons can be reabsorbed (7) and excite the Fig.…”

“…According to (6), narrowing the nanoparticle size distribution results in narrowing the luminescence band. Properly choosing the average QD size r leads to reduction of the overlap of the absorption and luminescence spectra, which allows reabsorption to be negligible.…”

“…A prism, diffraction grating or set of interferential filters can be used as the dispersion element. Each solar cell is illuminated with a corresponding band of sunlight [6]. The maximum value η = 43% under AM1.5 has been achieved by splitting the solar spectrum into three bands and each band illuminates cell with multiple junctions.…”