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Trace Sn-doped perovskite membrane repair preparation method and all-inorganic perovskite solar cell

A technology of perovskite and inorganic calcium, applied in circuits, electrical components, final product manufacturing, etc., can solve the problems of worrying about the quality of perovskite films, affecting the efficiency of interface charge extraction, and limitations.

Active Publication Date: 2019-08-27
深圳市运通天下科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, CsPbBr produced by traditional one-step or two-step 3 The quality of perovskite film is worrying
Furthermore, CsPbBr with a conduction band (CB) of -3.3eV and a valence band (VB) of -5.6eV 3 The wide bandgap energy level of perovskite material 2.3eV limits its charge transport ability, and TiO 2 / CsPbBr 3 and CsPbBr 3 The existence of a high-energy barrier between the / Carbon interface seriously affects the extraction efficiency of interfacial charges. Based on these problems, it usually leads to the CsPbBr 3 Perovskite solar cells have an efficiency (PCE) of less than 10%

Method used

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  • Trace Sn-doped perovskite membrane repair preparation method and all-inorganic perovskite solar cell
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  • Trace Sn-doped perovskite membrane repair preparation method and all-inorganic perovskite solar cell

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Embodiment 1

[0040] This embodiment is an all-inorganic perovskite solar cell, which sequentially includes a layered conductive glass layer, an electron transport layer, an all-inorganic perovskite layer and a carbon electrode layer.

[0041] Use the sol-gel method to coat a layer of dense titanium dioxide film on the conductive glass as an electron transport layer. After heat treatment at 400-450°C, perform titanium tetrachloride hydrolysis reaction treatment on the dense titanium dioxide film, and place it in a box-type resistance furnace after drying. Sintering at 450-500°C for later use.

[0042] Dissolve lead bromide and tin bromide in DMF solution to form base solution, the molar concentration of lead bromide is 1mol / L, and the molar concentration of tin bromide is 0.001mol / L. Cesium bromide was dissolved in DMSO to form a modification solution, and the molar concentration of cesium bromide was 1mol / L. The substrate solution was spin-coated onto the electron transport layer to form ...

Embodiment 2

[0046] This embodiment is an all-inorganic perovskite solar cell, which sequentially includes a layered conductive glass layer, an electron transport layer, an all-inorganic perovskite layer and a carbon electrode layer.

[0047] Use the sol-gel method to coat a layer of dense titanium dioxide film on the conductive glass as an electron transport layer. After heat treatment at 400-450°C, perform titanium tetrachloride hydrolysis reaction treatment on the dense titanium dioxide film, and place it in a box-type resistance furnace after drying. Sintering at 450-500°C for later use.

[0048] Dissolve lead bromide and tin bromide in the DMF solution to form a base solution, the molar concentration of lead bromide is 1mol / L, and the molar concentration of tin bromide is 0.002mol / L. Cesium bromide was dissolved in DMSO to form a modification solution, and the molar concentration of cesium bromide was 1mol / L. The substrate solution was spin-coated onto the electron transport layer to...

Embodiment 3

[0052] This embodiment is an all-inorganic perovskite solar cell, which sequentially includes a layered conductive glass layer, an electron transport layer, an all-inorganic perovskite layer and a carbon electrode layer.

[0053] Use the sol-gel method to coat a layer of dense titanium dioxide film on the conductive glass as an electron transport layer. After heat treatment at 400-450°C, perform titanium tetrachloride hydrolysis reaction treatment on the dense titanium dioxide film, and place it in a box-type resistance furnace after drying. Sintering at 450-500°C for later use.

[0054] Dissolve lead bromide and tin bromide in DMF solution to form base solution, the molar concentration of lead bromide is 1mol / L, and the molar concentration of tin bromide is 0.003mol / L. Cesium bromide was dissolved in DMSO to form a modification solution, and the molar concentration of cesium bromide was 1mol / L. The substrate solution was spin-coated onto the electron transport layer to form ...

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Abstract

The invention discloses a trace Sn-doped perovskite membrane repair preparation method and an all-inorganic perovskite solar cell. The preparation method comprises the following steps of dissolving tin halide and lead halide into a DMF solution to form a substrate solution; spin-coating the substrate solution onto the surface of a substrate, and drying the substrate solution on the surface of thesubstrate to enable the surface of the substrate to form a substrate layer; dissolving cesium halide into DMSO to form a modified solution, wherein the modification solution is spin-coated on the substrate layer repeatedly, the heating is performed after each spin coating is completed, and the modification solution and the substrate layer are gradually reacted to form the all-inorganic perovskitelayer. The tin halide has a damage effect on a film formed by the original lead halide, so that the substrate layer becomes a loose porous structure, the reaction of cesium halide and lead halide is facilitated, and the reaction area between cesium halide and lead halide is increased; and after cesium halide reacts, the pores are gradually filled up, and the obtained all-inorganic perovskite layerhas fewer needle holes and shows more excellent charge extraction capacity and charge transfer capability.

Description

[0001] 【Technical field】 [0002] The invention relates to a preparation method for repairing a trace Sn-doped perovskite film and an all-inorganic perovskite solar cell, belonging to the field of perovskite preparation methods. [0003] 【Background technique】 [0004] Perovskite solar cells have received unprecedented attention since their discovery, and their efficiency has grown from 3.8% to 23.7% since 2009. However, the vast majority of perovskite solar cells suffer from poor environmental stability. Among them, with CsPbBr 3 The all-inorganic perovskite solar cell with the perovskite light-absorbing layer structure is the best among the known perovskite solar cells with both efficiency and stability. Under unencapsulated conditions, it can maintain more than 85% of its original efficiency in the atmosphere for more than three months. Because CsPbBr 3 Perovskite has excellent environmental stability, so it can be prepared in the atmospheric environment, which is an adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/032
CPCH01L31/18H01L31/0321Y02P70/50
Inventor 诸跃进郭海燕裴越
Owner 深圳市运通天下科技有限公司
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