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Double-sided perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of large differences in uniformity and low photoelectric conversion efficiency

Pending Publication Date: 2022-07-12
HUANENG NEW ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the double-sided module is often prepared by one-time soaking and pulling method. During the soaking and pulling process, the uniformity of the upper and lower layers of the glass is quite different, and the overall photoelectric conversion efficiency is low due to the series structure of the battery.

Method used

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  • Double-sided perovskite solar cell and preparation method thereof
  • Double-sided perovskite solar cell and preparation method thereof
  • Double-sided perovskite solar cell and preparation method thereof

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preparation example Construction

[0050] The invention provides a preparation method of a double-sided perovskite solar cell, comprising the following steps:

[0051] a) Sputter deposition of indium tin oxide on both sides of the glass to form a double-sided conductive substrate;

[0052] b) depositing a first charge transport layer by sputtering on both sides of the double-sided conductive substrate;

[0053] c) Decrease the composite layer group obtained in step b) first at a rate of 14-16 mm / s, then at a rate of 7-9 mm / s, and finally immerse it into the perovskite precursor solution at a rate of 3-5 mm / s , for soaking;

[0054] d) lifting the soaked composite layer group from the perovskite precursor solution by means of plane lifting, and performing annealing to form a perovskite active layer on both sides of the composite layer group;

[0055] The lifting process includes: first rising at a rate of 1-3 mm / s, then rising at a rate of 7-9 mm / s, and finally rising at a rate of 14-16 mm / s;

[0056] e) anneal...

Embodiment 1

[0155] Fabrication of bifacial perovskite solar cells:

[0156] 1) The vertical magnetron sputtering method was used to simultaneously sputter and deposit ITO on both sides of the 2.2mm thick glass to form a double-sided conductive substrate;

[0157] Parameters for sputter deposition of indium tin oxide on both sides of glass include:

[0158] Background vacuum -4 Pa, the target base distance is 30cm, the sputtering power is 400W, Ar gas and O 2 The flow ratio is 35:1;

[0159] The thickness of the indium tin oxide deposition is 200nm;

[0160] The optical transmittance of the double-sided conductive substrate is 89%, and the resistance is 15Ω;

[0161] 2) Using a vertical magnetron sputtering method, sputtering and depositing TiO on both sides of the double-sided conductive substrate 2 Electron transport layer; parameters for sputter deposition include:

[0162] Background vacuum -4 Pa; target base distance is 50cm, sputtering power is 350W, Ar gas and O 2 The flow ratio...

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Abstract

The invention relates to the technical field of solar cells, in particular to a double-sided perovskite solar cell and a preparation method thereof. The preparation method comprises the following steps: a) sputtering and depositing indium tin oxide on two surfaces of glass to form a double-surface conductive substrate; b) sputtering and depositing a first charge transport layer on both sides of the double-sided conductive substrate; c) immersing the obtained composite layer group into a perovskite precursor solution at a three-step specific rate, and soaking; d) lifting the soaked composite layer group out of the perovskite precursor solution by adopting plane lifting, annealing, and forming perovskite active layers on the two surfaces of the composite layer group; the lifting process rises at a three-step specific speed; e) after sputtering and depositing a second charge transport layer on the surface of the perovskite active layer, annealing; and f) sputtering and depositing a conductive electrode on the surface of the obtained second charge transport layer to obtain the double-sided perovskite solar cell. The double-sided perovskite solar cell is excellent in thickness uniformity, high in power generation power and cost-saving.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a double-sided perovskite solar cell and a preparation method thereof. Background technique [0002] Bifacial modules can effectively increase power generation and reduce system LCOE, which has incomparable advantages over traditional single-sided modules. However, for bifacial modules, it is challenging to prepare uniform bifacial perovskite and transport layers at one time. The non-uniform film layers of double-sided modules lead to different final output power of the modules. Usually, the system mismatch of double-sided modules is more than 3 times that of conventional modules, which requires more uniform preparation of each film layer. Try to avoid mismatch loss caused by inconsistency when designing and connecting strings to inverters. At present, the preparation of bifacial modules is usually performed by a one-time soaking and pulling method. During the soaking and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/15H10K30/151H10K30/10Y02P70/50
Inventor 李梦洁赵志国赵东明秦校军丁坤刘家梁熊继光
Owner HUANENG NEW ENERGY CO LTD