Additive-assisted perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low device efficiency, high heating temperature, and long time consumption, so as to improve efficiency and stability, and increase steady-state output power , Eliminate the effect of positive and negative scanning differences

Active Publication Date: 2017-06-23
PEKING UNIV
View PDF4 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The photoelectric conversion efficiency of the device is relatively low, only about 14%;
[0005] (2) Under different forward and reverse scans, the device efficiency is quite different;
[0006] (3) The steady-state output characteristics of the device are not good
[0007] In addition, when using Pb(Ac) 2 .3H 2 In the process of O, triple crystallization water is introduced at the same time, and alkylamine ions are very sensitive to water, resulting in poor repeatability of the final device.
At the same time, the boiling point of water itself is higher than

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Additive-assisted perovskite solar cell and preparation method thereof
  • Additive-assisted perovskite solar cell and preparation method thereof
  • Additive-assisted perovskite solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The preparation of the above-mentioned perovskite solar cell comprises the following steps:

[0046] A) preparing a bottom charge collection layer on the bottom electrode layer;

[0047] B) Preparation of organic-inorganic perovskite active light-absorbing layer on the bottom charge collection layer by additive-assisted growth method, or deposition on the substrate consisting of bottom electrode / bottom charge collection layer / top electrode layer modified with / without top charge collection layer Perovskite active light-absorbing layer, thus completing the battery preparation;

[0048] C) For the case where the perovskite active light-absorbing layer is prepared directly on the bottom charge collection layer, the top charge collection layer and the top electrode layer are sequentially prepared on the surface of the organic-inorganic perovskite active light-absorbing layer to complete the preparation of the battery device.

[0049] Wherein, the preparation methods of the ...

Embodiment 1

[0069] Using glass as the substrate, deposit a transparent and conductive ITO layer on the surface of the glass plate, deposit PEDOT:PSS with a certain thickness such as 40nm on the surface of the ITO transparent electrode layer as the hole transport layer, and heat at 130°C for 20 minutes. 1mmol of Pb(Ac) 2 and 3mmol of MAI were dissolved in 1ml of DMF to prepare Pb(Ac) 2 :MAI mixed solution, this mixed solution is spin-coated on the conductive substrate ITO that has prepared PEDOT:PSS layer modification, and is heated at a certain temperature (such as 80 ℃) 5-10min, obtains CH 3 NH 3 PB 3 Perovskite active layer, the SEM test results of this film are as follows image 3 shown. The obtained films have high coverage and clear crystal grains. However, the flatness of the film surface is not good. followed by figure 2 As shown in the process, complete figure 1 The cells shown were fabricated at a standard solar intensity (AM1.5, 100mW / cm 2 ) under the irradiation of th...

Embodiment 2

[0073] Configure Pb(Ac) 2 : DMF solution of MAI (molar ratio 1:2.95~3.05), mix 0.1-0.5mol / L MABr additive into Pb(Ac) in volume ratio 1:100 (the solvent used for the additive is DMF) 2 : In the MAI solution, the MABr concentration obtained is Pb(Ac) 2 0.5-2mol% mixed perovskite solution. The mixed solution is spin-coated on the ITO transparent conductive bottom electrode layer modified by PEDOT:PSS, and heated at a certain temperature (such as 80°C) for 5-10min, and sintered into CH 3 NH 3 PB 3 The perovskite active layer, the SEM test results of the surface morphology of the active layer are as follows image 3 shown. From the comparison of the SEM surface morphology, it can be seen that after the addition of MABr additives, a smoother perovskite film was obtained. Such as figure 2 complete as shown figure 1 structure of solar cells, at a standard solar intensity (AM1.5, 100mW / cm 2 ) irradiation, test battery performance, the best device performance statistics are s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an additive-assisted perovskite solar cell and a preparation method thereof, and the solar cell sequentially comprises a bottom layer substrate, a bottom electrode layer, a bottom charge collection layer, an active light absorption layer, a top layer charge collection layer and a top electrode layer from the bottom to the top; At least one of the bottom electrode layer and the top electrode layer is transparent. The active light absorption layer is an additive-assisted growth perovskite semiconductor material APbX3, wherein A is at least one of alkylamine, acid amidine and alkali family elements, and X is at least one of iodine, bromine and chlorine. According to the invention, the method adjusts the thin film shape and crystallinity of a perovskite active layer through adding a little additive to anhydrous lead acetate perovskite solution, and improves the transmission and collection of carriers. The method improves the positive and negative sweep difference of the perovskite solar cell, guarantees the steady-state output, and improves the efficiency and repeatability of the cell.

Description

technical field [0001] The invention belongs to the field of organic-inorganic hybrid perovskite batteries, and in particular relates to an additive-assisted high-efficiency perovskite solar battery and a preparation method thereof. Background technique [0002] In recent years, the efficiency of solar cells based on organic-inorganic perovskites has been developed rapidly, especially with CH 3 NH 3 PB 3 For representative solar cells, the efficiency has rapidly increased from the initially reported 3.8% to over 20%. Currently, PbI 2 as the preparation of CH 3 NH 3 PB 3 The most commonly used source of lead, widely used in many preparation methods. In order to achieve low-cost preparation of high-efficiency perovskite solar cells, various thin-film deposition techniques have been developed in the past few years, among which one-step or two-step solution methods have become the focus of attention. In comparison, the one-step process is simpler than the two-step proces...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/30H10K30/15Y02E10/549Y02P70/50
Inventor 朱瑞罗德映赵丽宸胡芹刘易龚旗煌
Owner PEKING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap