Solar cell

Abstract

The invention provides a solar cell. The solar cell comprises a transparent substrate (10) and a transparent substrate (20), a transparent first electrode layer (11) and a transparent first electrode layer (21) which are formed on the transparent substrates, a photovoltaic conversion layer (13) and a photovoltaic conversion layer (23) which are formed on the first electrode layers, a nanometer particle layer (15) and a nanometer particle layer (25) which are formed on the photovoltaic conversion layers, a second electrode layer (16) and a second electrode layer (26) which are formed on the nanometer particle layers, and a backing plate (17) and a backing plate (28) which are formed on the second electrode layers. The nanometer particle layers are made of at least one of a mixture of molybdenum oxide and silver, titanium oxide, and a mixture of zinc oxide and silver. The nanometer particle layers are further formed between the second electrode layers and the backing plates. The nanometer particle layers are additionally arranged on shady faces of the photovoltaic conversion layers, due to the fact that the nanometer particle layers have a good scattering effect and are matched with the first electrode layers in front of the photovoltaic conversion layers, penetration times of light in the photovoltaic conversion layers are increased, and therefore the probability of being captured can be increased.

Description

technical field [0001] The invention relates to a solar cell, in particular to a thin-film solar cell capable of improving the light-harvesting effect. Background technique [0002] Research on solar cells as an important source of clean energy has been conducted for many years. Solar cells are generally characterized by solid-state crystalline structures that have an energy band gap between their valence electron bands and their conduction electron bands. When light is absorbed by the material, electrons occupying lower energy states are excited across the band gap to higher energy states. For example, when electrons in the valence band of a semiconductor absorb sufficient energy from photons of solar radiation, they can jump across the energy bandgap to a higher energy conduction band. Electrons excited to higher energy states leave unoccupied lower energy sites, or holes. Like free electrons in the conduction band, such holes can move between atoms in the crystal latti...

AI Technical Summary

Problems solved by technology

[0004] However, the above structure has very limited effect on improving the light-trapping effect.

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