Synthesis and properties of lead iodide for perovskite solar cells

DU Chen; MA Rui-xin; WANG Cheng-yan; WANG Shuo; WU Chao-rong

doi:10.13374/j.issn2095-9389.2019.04.005

Volume 41 Issue 4

Apr. 2019

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Article Navigation > Chinese Journal of Engineering > 2019 > 41(4): 454-460

DU Chen, MA Rui-xin, WANG Cheng-yan, WANG Shuo, WU Chao-rong. Synthesis and properties of lead iodide for perovskite solar cells[J]. Chinese Journal of Engineering, 2019, 41(4): 454-460. doi: 10.13374/j.issn2095-9389.2019.04.005

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DU Chen, MA Rui-xin, WANG Cheng-yan, WANG Shuo, WU Chao-rong. Synthesis and properties of lead iodide for perovskite solar cells[J]. Chinese Journal of Engineering, 2019, 41(4): 454-460. doi: 10.13374/j.issn2095-9389.2019.04.005

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Synthesis and properties of lead iodide for perovskite solar cells

doi: 10.13374/j.issn2095-9389.2019.04.005

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

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Corresponding author: MA Rui-xin, E-mail: maruixin@ustb.edu.cn
Received Date: 2018-04-10
Publish Date: 2019-04-15

Abstract

Abstract

Solar energy is an ideal renewable energy, and how to use solar energy efficiently is a hot topic for many researchers. So far, the development of solar cells has gone through three generations. The first generation used crystalline silicon cells; the second generation used thin-filmsolar cells. At present, the third generation utilizes new-type solar cells. As a part of the third-generation solar cells, perovskite solar cells have developed rapidly in recent years, making thema subject of a very vital research area. Lead iodide is a key raw material for organic-inorganic hybrid perovskite solar cells, and it is used by dissolving in dimethylformamide(DMF), thereby forming a film. Experimental results show that the reason for poor solubility of lead iodide in DMF is that oxides, such as H₂O, PbO, and PbO₂, tend to formoxide films on the surface of lead iodide crystals, which hinder its dissolution. Within a certain range, the solubility of lead iodide in DMF depends on the pH of the reaction solution during the synthesis process. After performing scanning electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy and other analytical tests, the optimal synthesis pH of lead iodide for the organic-inorganic hybrid perovskite solar cells is 2. Within a certain range, the pH value, dropping speed, and solution concentration of the reaction solution do not affect the microscopic morphology of lead iodide and its solubility in DMF. Simultaneously, results indicate that the recrystallization, thermal reaction, and low dropping speed reaction conditions led to the preferential growth of lead iodide on the(001)surface.
- perovskite solar cells,
- lead iodide,
- dimethylformamide,
- solubility,
- preparation process

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References(26)

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