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Silicon-based single-sided integrated absorption emitter for solar thermal photovoltaic cell and preparation method of silicon-based single-sided integrated absorption emitter

A photovoltaic cell and solar thermal technology, applied in the field of solar thermal photovoltaic, can solve problems such as difficult realization and complex structure, and achieve the effects of improved light absorption, enhanced light trapping effect, and high solar energy conversion efficiency

Active Publication Date: 2020-06-05
NANJING UNIV
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Problems solved by technology

However, the current design of single-sided integrated selective absorbers is mostly complex in structure and fine in size, and requires high-precision lithography methods, which is difficult to realize

Method used

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  • Silicon-based single-sided integrated absorption emitter for solar thermal photovoltaic cell and preparation method of silicon-based single-sided integrated absorption emitter
  • Silicon-based single-sided integrated absorption emitter for solar thermal photovoltaic cell and preparation method of silicon-based single-sided integrated absorption emitter
  • Silicon-based single-sided integrated absorption emitter for solar thermal photovoltaic cell and preparation method of silicon-based single-sided integrated absorption emitter

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Embodiment Construction

[0024] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as Figure 1-4 As shown, this embodiment provides a silicon-based single-sided integrated absorbing emitter for solar thermal photovoltaic cells, including a top solar concentration system, a selective absorbing emitter at the bottom, and surrounding selective absorbing emitters. A narrow bandgap photovoltaic cell and a heat storage layer under the selective absorption emitter; the selective absorption emitter includes a silicon wafer substrate and several fan-shaped cross-sections arranged on the silicon wafer substrate at different depth levels The fan-shaped sidewall nanohole array, the selective absorption emitter can efficiently absorb light in the visible light band and realize narrow-band light absorption with adjustable wavelength position in the range of 1um to 2.5um, while suppressing optical absorption in other spectral b...

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Abstract

The invention discloses a silicon-based single-sided integrated absorption emitter for a solar thermal photovoltaic cell. The silicon-based single-sided integrated absorption emitter comprises a top-layer solar concentrating system, a selective absorption emitter at the bottom, a narrow-band-gap photovoltaic cell surrounding the selective absorption emitter and a heat storage layer at the lower part of the selective absorption emitter; and the selective absorption emitter comprises a silicon wafer substrate and a plurality of fan-shaped side wall nanopore arrays which are arranged on the silicon wafer substrate and have different depth levels. The silicon-based semiconductor metal composite structure easy to prepare without photoetching provided by the invention can be applied to a single-sided integrated absorption emitter of a solar thermal photovoltaic system by utilizing the unique optical characteristics of the silicon-based semiconductor metal composite structure, and higher solar conversion efficiency is obtained.

Description

technical field [0001] The invention relates to a silicon-based semiconductor-metal composite structure that can be used as a single-sided integrated absorption emitter and a preparation method thereof, belonging to the field of solar thermal photovoltaics. Background technique [0002] Solar thermal photovoltaic technology is a technology that uses solar heat sources to heat a radiator, and then converts the infrared radiation of the radiator into electricity. Compared with other solar conversion systems, solar thermal photovoltaic technology can supplement other energy sources at the same time to work for a long time, and is integrated with the heat storage system. This technology can break through the theoretical limit of single-junction solar cells and achieve 85.4% high-efficiency photoelectricity. conversion efficiency. Among them, spectrally selective absorbers and emitters are the core devices of solar thermal photovoltaic systems. In order to maximize the use of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/054H01L31/055H01L31/18
CPCH01L31/054H01L31/055H01L31/18Y02E10/52Y02P70/50
Inventor 徐骏侯国智王朝晔
Owner NANJING UNIV
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