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Perovskite solar cell based on composite hole transport layer and preparation method thereof

A technology of hole transport layer and perovskite, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of slow extraction speed, low mobility, and poor energy level matching, so as to improve the interface, Effect of improving electrical conductivity and improving energy conversion efficiency

Pending Publication Date: 2020-08-07
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, the trans structure based on the PEDOT:PSS hole transport layer is suitable for the preparation of flexible batteries, but the perovskite solar cells with PEDOT:PSS as the hole transport layer also have some disadvantages, and the mobility of PEDOT:PSS is also low, making the hole At the same time, the energy level matching between PEDOT:PSS and the perovskite active layer is not very good, which further reduces the photoelectric conversion efficiency of titanium solar cells.

Method used

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  • Perovskite solar cell based on composite hole transport layer and preparation method thereof
  • Perovskite solar cell based on composite hole transport layer and preparation method thereof
  • Perovskite solar cell based on composite hole transport layer and preparation method thereof

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preparation example Construction

[0037] Further, a method for preparing a composite hole transport layer is provided, comprising the following steps:

[0038] Step 1: Coating the aqueous solution of PEDOT:PSS on the substrate, forming the PEDOT:PSS layer 31 after annealing, the weight ratio of PEDOT and PSS in the aqueous solution of PEDOT:PSS is 1:2~1:8, preferably 1:6;

[0039] Step 2: coating the amphiphilic molecule solution on the PEDOT:PSS layer 31 to form a hole modification layer 32, the solute concentration in the amphiphilic molecule solution is 0.1mg / ml~1mg / ml, preferably The concentration is 0.25mg / ml-0.75mg / ml.

[0040] further, figure 1 A perovskite solar cell based on a composite hole transport layer is provided, which sequentially includes a transparent substrate 1, a transparent electrode 2, a composite hole transport layer, a perovskite active layer 4, an electron transport layer 5, a hole Barrier layer 6, counter electrode 7. A transparent electrode 2 is arranged on the upper surface of...

Embodiment 1

[0049] In order to further illustrate the role of the amphiphilic molecule as the hole modifying layer 32 to prepare the composite hole transport layer, the amphiphilic molecule in this embodiment selects glycerol monostearate (C21H42O4), and its molecular schematic diagram is as follows figure 2 As shown, one end contains a polar group (hydrophilic end) and one end contains a non-polar group (hydrophobic end), and the amphiphilic molecule also includes an ester group.

[0050] This embodiment provides a specific composite hole transport layer and its preparation method.

[0051] The composite hole transport layer includes a PEDOT:PSS layer 31 and glyceryl monostearate (abbreviated as: GMS), the thickness of the PEDOT:PSS layer 31 is 40nm; the thickness of the GMS layer is 8nm.

[0052] The preparation method is as follows: prepare the transparent electrode 2 (here ITO) deposited on the upper surface of the transparent substrate 1 (here is transparent glass) as the base of th...

Embodiment 2

[0055] Based on Example 1, this embodiment provides a method for preparing a perovskite solar cell based on a composite hole transport layer, comprising the following steps:

[0056] The preparation method is as follows:

[0057] (1) Preparatory work: prepare the transparent electrode 2 (here ITO) deposited on the upper surface of the transparent substrate 1 (here is transparent glass) as the base of the hole transport layer, respectively use deionized water, ethanol, acetone, isopropyl Wash the substrate with alcohol or ethanol, dry the substrate with nitrogen after cleaning, and then treat the substrate with ultraviolet and ozone for 15 minutes.

[0058] (2) Preparation of PEDOT:PSS / GMS composite hole transport layer: place the substrate on a spin coater, filter the PEDOT:PSS aqueous solution of CLEVIOS_P_VP_AI_4083 from Heraeus Company with a 0.45 μm filter membrane, and in the aqueous solution of PEDOT:PSS The weight ratio of PEDOT and PSS is 1:6, and then evenly coat the...

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Abstract

The invention provides a perovskite solar cell based on a composite hole transport layer and a preparation method thereof, and belongs to the technical field of perovskite solar cells. The composite hole transport layer comprises a PEDOT:PSS layer, and the PEDOT:PSS layer is provided with a hole modification layer, the hole modification layer is a film prepared from amphiphilic molecules, two endsof the amphiphilic molecules are respectively polar groups and non-polar groups, and the amphiphilic molecules further comprise ester groups. According to the perovskite solar cell provided by the invention, the conductivity of the PEDOT:PSS layer is improved, the interface energy level matching of the PEDOT:PSS and the perovskite active layer is improved, meanwhile, ester groups in amphiphilic molecules inhibit the defects generated on the interface, carrier capture sites are reduced, and the energy conversion efficiency of the perovskite solar cell is greatly improved.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a perovskite solar cell based on a composite hole transport layer and a preparation method thereof. Background technique [0002] The generalized perovskite has an ABX3 structure, generally a cubic or octahedral structure, A ions usually refer to organic cations, and the most commonly used ones are (methylamino), others such as (formamidine) and (Ethylamino) also has certain applications. B ions refer to metal cations, mainly Pb 2+ and Sn 2+ , X ion is a halogen anion, that is, I - 、Br - , Cl - Wait. Perovskite solar cells (PSCs), due to their excellent photoelectric properties, have the advantages of adapting to flexible substrates to prepare flexible devices, and can take into account both efficiency and cost. One of the big scientific and technological advances, it is one of the most promising materials in the third generation of solar cells. High-pe...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/114H10K85/1135H10K30/00Y02E10/549Y02P70/50
Inventor 章文峰林埔安黄跃龙
Owner SOUTHWEST PETROLEUM UNIV
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