Journal
ACS ENERGY LETTERS
Volume 6, Issue 7, Pages 2626-2634Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c01187
Keywords
-
Categories
Funding
- Swiss Government Excellence Scholarship [2017.1080]
- European Union's Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie project PerSisTanCe [841005]
- Swiss State Secretary for Education, Research and Innovation (SERI) [17.00105]
- European Union
- Adolphe Merkle Foundation
- Marie Curie Actions (MSCA) [841005] Funding Source: Marie Curie Actions (MSCA)
Ask authors/readers for more resources
Depositing PMMA in perovskite solar cells can increase fill factor and absolute efficiency, leading to a physical isolation mechanism that repairs perovskite defects. This approach offers a promising method for enhancing the performance of perovskite solar cells.
Passivation and interlayer engineering are important approaches to increase the efficiency and stability of perovskite solar cells. Thin insulating dielectric films at the interface between the perovskite and the charge carrier transport layers have been suggested to passivate surface defects. Here, we analyze the effect of depositing poly(methyl methacrylate) (PMMA) from a very low-concentration solution. Spatial- and time-resolved photoluminescence and atomic force microscopy analyses of samples with diverse morphologies demonstrate the preferential deposition of PMMA in topographic depressions of the perovskite layer, such as grain and domain boundaries. This treatment results in an increase in the fill factor of more than 4% and an absolute efficiency boost exceeding 1%, with a maximum efficiency of 20.4%. Based on these results, we propose a physical isolation mechanism rather than a chemical passivation of perovskite defects, which explains not only the data of this study but also most results found in earlier works.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available