Novel two-sided thin film solar cell and industrial manufacturing method thereof

Abstract

The invention belongs to the field of high-efficiency and low-cost thin film solar cells and particularly provides a novel two-sided thin film solar cell and an industrial manufacturing method thereof. Firstly, laser segmentation is conducted on TCO-1 (front electrode and electron transport materials (ETM)), an ABX3 (A=CH3NH3, B=Pd, Sn and the like, and X=I, Cl, Br and the like) perovskite absorbing layer (the thickness ranges from 200 nm to 400 nm, the band gap width is 1.5 eV and the electron affinity is 3.93 eV) is deposited on TCO-1 conducting glass (the band gap width is larger than 3.2 eV and the electron affinity is about 4.8 eV) obtained after laser segmentation in a dual-source coevaporation mode, samples are transferred into PECVD equipment, a gradient doped p / p<+> type hydrogenated silicon-based thin film (the thickness ranges from 5 nm to 30 nm, the band gap width ranges from 1.8 eV to 2.0 eV, and the electron affinity is 3.45 eV) is deposited, and a back-side electric field is established; after secondary laser segmentation is immediately conducted on the samples, the samples are transferred into vacuum equipment, TCO-2 (ITO or ZnO or the like) is deposited, and finally third laser segmentation is conducted on the samples obtained after the procedures so as to establish composite grid line electrodes. Finally, the high-efficiency and low-cost novel two-sided light-catching solar cell is obtained.

Description

technical field [0001] The present invention relates to a novel double-sided thin-film solar cell and its industrial manufacturing method, in particular to a P-type silicon-based thin film that replaces the expensive organic hole conductor (Spiro-OMeTAD) commonly used in the prior art and integrates the back metal The invention relates to a perovskite solar cell whose electrode is replaced by a window electrode such as an ITO transparent conductive film and a manufacturing method thereof, belonging to the field of high-efficiency and low-cost thin-film solar cells. Background technique [0002] A solar cell is a device that uses the photovoltaic effect to directly convert solar energy into electrical energy. Since the commercialization of terrestrial solar cells in the mid-1970s, silicon has dominated as the basic cell material, and it is certain that this situation will not change fundamentally for a long time to come. From the point of view of material physics, silicon ma...

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Problems solved by technology

As stated in the Chinese patent application document with publication number CN103700769A (application number 201310651418.4), this type of solar cell uses relatively expensive organic molecular conductive materials (Spiro-OMeTAD, P3HT, PTAA , TAPC, NPB, TPD, etc.) as the hole-conducting layer (HTM), and expensive gold (Au) or platinum (Pt) must be used as the metal back electrode, which greatly increases the cost of the battery

The literature "Etgar, L. et al. , J. Am. Chem. Soc. 134, 17396–17399 (2012)" reported perovskite thin-film solar cells that directly cancel hole transport materials, but the photoelectric conversion efficiency is low ( The highest efficiency is only 8%)

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