Condensing beam-splitting photovoltaic system

Abstract

A condensing beam-splitting photovoltaic system mainly comprises a first condenser for condensing incident light into condensed light; a beam-splitting element for splitting the condensed light into transmitted light in a specific waveband and reflected light in other wavebands; a second condenser for condensing the reflected light into concentrated light; a collimating lens for collimating the condensed light generated by the first condenser and the projecting condensed light onto the beam-splitting element; a first photovoltaic cell for converting the concentrated light into photovoltaic energy; a second photovoltaic cell for converting the transmitted light into photovoltaic energy. By virtue of the splitting and condensing effect t of the first condenser, the beam-splitting element andthe second condenser, the photovoltaic cells having different PN junctions disposed at a rear end can obtain the matched solar spectral bands and the appropriate amount of solar radiant energy, suchthat the current output from each PN junction of the photovoltaic cells achieves a uniform output effect, thereby contributing to further improving the photoelectric conversion efficiency of the solarcell.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a light-concentrating and splitting photovoltaic system. Background technique [0002] After decades of development, solar power generation technology has established its important position in the field of new energy. Photovoltaic cells are the core devices of solar power generation, and their photoelectric conversion efficiency directly affects the performance of the entire power generation system. How to improve the photoelectric conversion efficiency of photovoltaic cells and the power generation efficiency of photovoltaic systems has always been the goal pursued by researchers in the field of solar power generation. [0003] As we all know, the core of a solar cell is a PN junction. A PN junction corresponds to a fixed band gap, which can only absorb photons in a specific wavelength range and has the highest absorption efficiency for light of a specific ...

AI Technical Summary

Problems solved by technology

[0005] Under the standard spectral distribution of AM1.5d, the current obtained by the Ga0.50In0.50P sub-cell and the Ga0.99In0.01As sub-cell are relatively matched, and the current obtained by the Ge sub-cell is relatively large. This current mismatch will cause the Ge sub-cell The optimal working condition cannot be achieved, so the long-wavelength light is not fully utilized

Images