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Modified electron transport layer and perovskite solar cell

A technology of electron transport layer and solar cell, which is applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems such as battery instability, achieve the goal of enhancing electron transport capacity, improving photocurrent and efficiency, and improving stability and lifespan Effect

Inactive Publication Date: 2015-05-20
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the strict battery stability test, ZnO and TiO 2 As the electron transport layer of the battery, the interface between the electrode and the electron transport layer degrades relatively quickly over time, and there is a problem of battery instability.

Method used

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  • Modified electron transport layer and perovskite solar cell
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  • Modified electron transport layer and perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the inverted organic solar cell structure in this embodiment includes a transparent conductive film 1 , a modification layer 2 , an electron transport layer 3 , an organic light absorption layer 4 , a hole transport layer 5 and an anode electrode 6 from bottom to top. A single specific material is given in this embodiment, which does not limit the choice of other materials, but is just an example to illustrate the present invention. The ITO conductive film 1 is ultrasonically cleaned with detergent, water, isopropanol and acetone, and after drying, a 1nm LiF modification layer 2 is evaporated in vacuum, and then a 30nm ZnO electron transport layer 3 is spin-coated on the solution, and annealed at 140 degrees. , followed by spin-coating PTB7-Th:PC70BM (ratio 1:1.5) mixed organic photoactive layer 4, followed by vacuum thermal evaporation of 7nm MoO 3 A hole transport layer 5 and a silver electrode 6 of 100 nm. The efficiency of organic solar ...

Embodiment 2

[0041] Such as figure 2 As shown, the structure of the perovskite battery in this embodiment includes a transparent conductive film 1, a modification layer 2, an electron transport layer 3, a perovskite light absorption layer 4, a hole transport layer 5 and an anode electrode 6 from bottom to top. A single specific material is given in this embodiment, which does not limit the choice of other materials, but is just an example to illustrate the present invention. The ITO conductive film 1 is ultrasonically cleaned with detergent, deionized water, isopropanol and acetone, dried, and then a 1nm LiF modification layer 2 is evaporated in vacuum, followed by a 15nm ZnO electron transport layer 3 deposited by magnetron sputtering, and then spun painted CH 3 NH 3 PB 3 The perovskite photoactive layer 4 is annealed at 60°C, then spin-coated with a Spiro-OMeTAD hole transport layer 5, and then coated with a 100nm silver electrode 6 by vacuum thermal evaporation. The perovskite batt...

Embodiment 3

[0043] Such as image 3 As shown, in this embodiment, the inverted organic solar cell structure includes, from bottom to top, a transparent conductive film 1, a doped electron transport layer 30, an organic light absorption layer 4, a hole transport layer 5 and a silver electrode 6 (anode) . A single specific material is given in this embodiment, which does not limit the choice of other materials, but is just an example to illustrate the present invention. The ITO conductive film 1 is ultrasonically cleaned with detergent, water, isopropanol and acetone. After drying, spin-coat the doped ZnO electron transport layer 3 containing 1% LiF, and then spin-coat PTB7-Th: PC70BM (ratio 1: 1.5) Mixed photoactive layer 4, followed by vacuum thermal evaporation of 5 nm of MoO 3 A hole transport layer 5 and a silver electrode 6 of 100 nm. The efficiency of the organic solar cell adopting this structure can reach more than 10%, and the cell efficiency is basically equal to that of the c...

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Abstract

The invention belongs to the field of photoelectric devices, and discloses a modified electron transport layer and a perovskite solar cell, the modified electron transport layer comprises a modified layer capable of decreasing the contact barrier between an electrode and an electron transport layer and the electron transport layer, moreover, the electron transport layer is coated with the modified layer, and the atoms or ions in the modified layer can diffuse to the electron transport layer and enhance the electrical conductivity of the electron transport layer. The invention also discloses the solar cell adopting the modified electron transport layer as an electron transport layer. The invention helps to decrease the series resistance of a perovskite cell and an organic solar cell in order to increase the efficiency of the cells, retards the deterioration of contact performance between the electron transport layer and the electrode, enhances the stability of the cell, and prolongs the life of the cell.

Description

technical field [0001] The invention belongs to the field of optoelectronic devices, in particular to a modified electron transport layer that enhances the efficiency and stability of a thin film solar cell, and the modified electron transport layer is used as an electron transport layer of a perovskite solar cell or an organic solar cell and hole blocking layer. Background technique [0002] Perovskite cells and organic solar cells are rapidly developing thin-film solar cells in recent years, which have the advantages of low cost, light weight, and flexible printing. The efficiency of single-junction organic solar cells has exceeded 10%, which has preliminary commercial application value. The current efficiency of perovskite solar cells is close to 20%, and it has commercial application value from the perspective of efficiency. However, these two batteries have disadvantages such as poor stability and short life, which hinder their commercial application. The commonly us...

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/46
CPCY02E10/549
Inventor 陈晓红陆浙蒋紫曜贾祥坤林宣怀王晋峰朴贤卿孙卓
Owner EAST CHINA NORMAL UNIV
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