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Sb-tin dioxide nano-precursor and method for preparing perovskite solar cell by using same as electron transport layer

An electron transport layer and solar cell technology, applied in the field of solar cells, can solve problems such as instability and hinder commercial application, and achieve the effects of simple preparation method, balanced transmission of photogenerated electrons and holes, and wide application range.

Active Publication Date: 2019-10-08
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, the photoelectric conversion efficiency of organic-inorganic hybrid perovskite solar cells has rapidly increased from the initial 3.8% to 23.7%, but there are still key technical problems in the preparation of large-area, high-efficiency perovskite solar cell devices; in addition, perovskite The instability of solar cells to humidity, temperature, etc. is still a bottleneck hindering their commercial application

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  • Sb-tin dioxide nano-precursor and method for preparing perovskite solar cell by using same as electron transport layer
  • Sb-tin dioxide nano-precursor and method for preparing perovskite solar cell by using same as electron transport layer
  • Sb-tin dioxide nano-precursor and method for preparing perovskite solar cell by using same as electron transport layer

Examples

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Embodiment 1

[0032] A non-chloride based Sb-SnO 2 The preparation method of the perovskite solar cell of the electron transport layer, the process is as follows:

[0033] (1) Select the deposited ITO electrode glass sheet, wash it repeatedly with detergent to remove the oil on the surface of the glass sheet; divide the ITO conductive glass into regular small pieces of 3 cm × 3 cm, and ultrasonicate in deionized water for 50 min, and in acetone for 30 min. min, ultrasonic in isopropanol for 30 min; the resulting ITO glass sheet was dried in an oven at 80 °C for 30 min to obtain an ITO electrode.

[0034] (2) Preparation of Sb-SnO 2 Electron transport layer: weigh 10 g Sn powder and 0.36 g Sb 2 o 3 powder (wherein the molar percentage of Sb to Sn is 3 mol%), the above two powders are added to the double-necked round bottom flask in turn, add 15 ml of deionized water, and keep stirring (in order to ensure more heat in the reaction process Make the solution overflow the flask, and the whol...

Embodiment 2

[0044] For Sb-SnO 2 Electron transport layer, gradually increase the molar percentage of Sb (the molar ratio of Sb to Sn, the molar ratio is 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 mol%), the corresponding perovskite solar energy The photoelectric conversion efficiency of the battery presents a trend of first increasing and then declining, and the others are the same as in Example 1; 2 The Sb mol% change relationship curve in the electron transport layer is as follows Figure 4 As shown in (a); it shows that the introduction of an appropriate amount (2.0~4.0 mol%) of Sb can significantly improve the Sb-SnO2 Electron mobility, photoelectric conversion efficiency increased from 16.32% to the maximum efficiency of 21.25% (in terms of Sn molar ratio, Sb addition is 3.0 mol%), improving photoelectric conversion efficiency. (b) is Sb-SnO 2 / MA 0.7 FA 0.3 PB 3 The photoelectric conversion efficiency retention rate with the illumination time, after the perovskite solar cell ...

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Abstract

The invention discloses an Sb-SnO2 nano-precursor and a method for preparing a perovskite solar cell by using the same as an electron transport layer. The preparation process of the solar cell comprises the steps that (1) an Sb-SnO2 electron transport layer is deposited on a clean ITO electrode; (2) a C60-SAM interface passivation layer is deposited on the Sb-SnO2 electron transport layer; (3) anMA0.7FA0.3PbI3 photosensitive layer is deposited on the C60-SAM interface passivation layer; (4) a Spiro-OMeTAD hole transport layer is deposited on the photosensitive layer; and (5) an Au counter electrode is evaporated on the Spiro-OMeTAD hole transport layer. The average photoelectric conversion efficiency in the laboratory stage reaches 20.83%. The optimal photoelectric conversion efficiency exceeds 21.0%. After an optimized device continuously irradiate for 70 hours without packaging, the photoelectric conversion efficiency is stilled maintained at 75% of the initial efficiency.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a Sb-SnO 2 A nano-precursor and a method for preparing a perovskite solar cell using it as an electron transport layer. Background technique [0002] Solar cells are a green new technology that converts solar energy into electric energy on a large scale. The development of solar cells can alleviate environmental pollution, solve the traditional energy crisis, and promote sustainable energy development. Among them, crystalline silicon solar cells have made great achievements in terms of conversion efficiency and preparation cost. It has made remarkable progress and has occupied most of the application market. At present, the research of solar cells presents the following new directions: 1. Develop top or bottom cells that match crystalline silicon cells, and construct stacked cells with a theoretical efficiency exceeding 33%; 2. Develop new types of solar cells such as flexib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/42B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H10K71/00H10K30/35H10K2102/00Y02E10/549
Inventor 刘向阳赵晓伟牛晨杨晓渡
Owner HENAN UNIVERSITY