Green Solvent Ethanol-Based Inks for Industrially Applicable Deposition of High-Quality Perovskite Films for Optoelectronic Device Applications

被引:7
|
作者
Rezaee, Ehsan [1 ]
Kutsarov, Dimitar I. [1 ]
Zhang, Jing [1 ]
Koutsourakis, George [2 ]
Li, Bowei [1 ]
Castro, Fernando A. [2 ]
Silva, S. Ravi P. [1 ]
机构
[1] Univ Surrey, Adv Technol Inst ATI, Dept Elect & Elect Engn, Guildford GU2 7XH, Surrey, England
[2] Natl Phys Lab, Hampton Rd, Teddington TW11 0LW, England
基金
英国工程与自然科学研究理事会; 欧盟地平线“2020”;
关键词
bar-coating; green solvents; large areas; perovskites; scales; SCALABLE FABRICATION; SOLAR-CELLS; EFFICIENCY;
D O I
10.1002/smtd.202300564
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Incontrovertibly there is an increasing demand for the development of benign inks suitable for fabrication of high-performing perovskite-based thin film functional layers. Nevertheless, most reported perovskite precursors rely on the use of highly toxic solvents such as acetonitrile, 2-methoxyethanol, dimethylformamide, and many others. Hence, there is a strong imperative for the development of novel and greener inks, which will facilitate smoother commercialization of technologies based on functional perovskite films. Therefore, four perovskite precursors are studied, some of which consist of up to 90% ethanol. All inks are developed to fulfill the requirements of a high-throughput deposition compatible with roll-to-roll techniques at room temperature, assisted by an air knife for instant solvent removal. Two of the inks are particularly suitable for the fabrication of high-quality and densely packed multi-crystalline (CH3NH3)PbI3 layers, as confirmed by numerous nanoscale spectroscopic and material characterization techniques. Additionally, large-area photoluminescence (PL) imaging is demonstrated to improve the quality of the deposited perovskite films, with a route to enhance deposition uniformity when upscaling for manufacture. The genuine potential of the developed greener perovskite inks is demonstrated with the fabrication of solar cells with power conversion efficiencies above 19.5%.
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页数:10
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