Stable and high-efficiency two-dimensional layered perovskite solar cell and preparation method therefor

A solar cell, two-dimensional layered technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as unfavorable large-scale production, low device efficiency, poor repeatability, etc., to achieve large-scale commercial applications, short-circuit The effect of current increase

Active Publication Date: 2018-08-03
NANJING TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the traditional two-dimensional layered perovskite film preparation method, the obtained perovskite grains will grow in the direction that is not conducive to carrier transport, making the device efficiency extremely low
At present, the most efficient two-dimensional layered perovskite solar cells need to prepare the perovskite film by preheating the substrate. In this method, the substrate temperature is difficult to control during the spin coating process, the repeatability is poor, and the operator's high technical requirements
At the same time, the uneven substrate temperature will directly lead to uneven thickness and poor uniformity of the prepared perovskite film.
Moreover, the current preparation process of two-dimensional layered perovskites is basically carried out in an inert atmosphere, which is not conducive to large-scale industrial production.

Method used

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  • Stable and high-efficiency two-dimensional layered perovskite solar cell and preparation method therefor
  • Stable and high-efficiency two-dimensional layered perovskite solar cell and preparation method therefor
  • Stable and high-efficiency two-dimensional layered perovskite solar cell and preparation method therefor

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Embodiment 1

[0022] The present invention provides an efficient and stable two-dimensional layered perovskite solar cell, the structure of which is a conductive transparent substrate (ITO, PET, etc.), a hole transport layer (PEDOT: PSS, CuI, CuSCN, NiO X , RGO, GO, etc.), two-dimensional layered perovskite active layer A’ 2 A n-1 M n X 3n+1 (n=1~∞), electron transport layer (PCBM, ZnO, etc.), interface modification layer (LiF, MoO 3 , BCP, C 60 Etc.), metal electrodes (Au, Ag, Al, etc.).

[0023] The method for preparing a two-dimensional layered perovskite solar cell in air provided by the present invention has the following main operation steps:

[0024] Step 1: Dry the conductive transparent substrate processed by the cleaning process with nitrogen and make it hydrophilic.

[0025] Step 2: Depositing a hole transport layer through a solution spin coating process on the conductive transparent substrate obtained through the processing of Step 1.

[0026] Step 3: Place the device processed in Step ...

Embodiment 2

[0035] The structure of the two-dimensional layered perovskite solar cell in the embodiment of the present invention is as figure 1 As shown, they are arranged in sequence: ITO transparent conductive glass, hole transport layer (PEDOT:PSS), two-dimensional layered perovskite active layer (BA 2 MA 3 Pb 4 I X Cl 13-x ), electron transport layer (PCBM), interface modification layer (LiF), metal electrode (Al).

[0036] 1. Treatment of conductive transparent substrate of two-dimensional layered perovskite solar cell

[0037] (1) The ITO transparent conductive glass was ultrasonically treated with detergent for 20 minutes, and deionized water, acetone, and ethanol were ultrasonicated for 10 minutes respectively; (2) The cleaned ITO transparent conductive glass was treated in an ultraviolet ozone machine for 20 minutes.

[0038] 2. Preparation of hole transport layer for two-dimensional layered perovskite solar cells

[0039] (1) First filter the hole transport layer material PEDOT:PSS with ...

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Abstract

The invention discloses a method for preparing a stable and high-efficiency two-dimensional layered perovskite solar cell, and the method is characterized in that the method achieves the growth of micron-order perovskite crystalline grains in the air through the continuous heating in the whole spin coating process, and achieves the preparation of a flat high-quality perovskite film and a stable and high-efficiency perovskite photovoltaic device. A continuous heating method in the whole spin coating process, which is disclosed by the invention, enables a solvent to quickly volatilize to speed up the growth and conversion of the crystalline grains, also facilitates the growth of two-dimensional layered perovskite in a direction perpendicular to a substrate, and finally forms a flat and denseuniform perovskite film. The method disclosed by the invention does not need inert atmosphere for protection, facilitates the preparation of the large-area perovskite, and reduces the cost.

Description

Technical field [0001] The invention relates to the field of perovskite solar cells, and more specifically to a stable and efficient two-dimensional layered perovskite solar cell and a preparation method thereof. Background technique [0002] In recent years, perovskite solar cells have developed rapidly in the field of photovoltaic technology. The photoelectric efficiency of perovskite solar cells has increased from 3.8% at the beginning to 22.7% in just a few years. This growth rate is unprecedented in the field of photovoltaics. Perovskite material itself has the advantages of strong light absorption, high carrier mobility, long carrier diffusion distance, adjustable band gap, etc., making perovskite materials expected to become the most ideal solar cell materials, and even achieve 33% energy conversion efficiency. At the same time, perovskite solar cells can be prepared by a simple low-temperature solution method, and bendable flexible devices can be fabricated on a flexible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/30H10K30/152H10K30/15Y02E10/549
Inventor 陈永华李陶陶夏英东黄维
Owner NANJING TECH UNIV
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