Journal
CHEMICAL ENGINEERING JOURNAL
Volume 420, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127579
Keywords
Ligand; Additive engineering; Defect; Stability; MAPbI(3)
Categories
Funding
- National Natural Science Foundation of China NSFC [51702038]
- Sichuan Science & Technology Program [2020YFG0061]
- Recruitment Program for Young Professionals
- Opening Project of Shanxi Province Key Laboratory of Functional Nanocomposites [NFCM201801]
- National Key Research and Development Program of China [2017YFA0206600]
- National Natural Science Foundation of China [51773045, 21772030, 51922032, 21961160720]
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This research utilized 5-(ethylthio)-1H-tetrazole (ETT) to improve the quality of perovskite films, resulting in increased power conversion efficiency and enhanced moisture stability in metal hybrid perovskite solar cells (PSCs).
The commercialization process of metal hybrid perovskite solar cells (PSCs) is hindered by the poor quality of perovskite films, imperfect carrier extraction, and inferior stability. Organic or inorganic molecules have been widely used to overcome these limitations. Herein, 5-(ethylthio)-1H-tetrazole (ETT) is applied for the deposition of perovskite films with high crystallinity and smooth surface. Due to the interaction between the lone pair electrons of tetrazole and Pb2+, the surface defects of perovskite films were passivated, thus leading to facilitated charge transport and inhibited carrier recombination. The improved crystallinity and defect passivation enabled a power conversion efficiency over 20% in the ETT-modified inverted MAPbI3 PSC device, along with notably enhanced moisture stability. Our work provides a feasible strategy for the crystallization modulation and humidity stability enhancement of PSCs.
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