Journal
ADVANCED ENERGY MATERIALS
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202301302
Keywords
defect passivation; electron density; perovskite photovoltaics; push-pull electron structures; solar cells
Ask authors/readers for more resources
5-chloro-2-hydroxypyridine derivatives with -NH2 and -F end groups (HNCLP and HFCLP) are chosen to realize the push-pull electronic structure configuration. The experimental results demonstrate that HNCLP with optimized electronic configuration significantly enhances the passivation ability of perovskite solar cells (PSCs), improves the crystal quality of the film, suppresses nonradiative recombination, and achieves an efficiency of 24.47%.
Targeted passivation of defects in perovskite is the primary consideration in the design of additives containing functional groups. However, the precise modulation of electron structure in functional groups and the structure-activity relationship between electronic configuration and performance of perovskite solar cells (PSCs) still need to be explored. In this study, 5-chloro-2-hydroxypyridine derivatives with -NH2 (HNCLP) and -F (HFCLP) end groups are selected to realize the push-pull electronic structure configuration. Density functional theory demonstrates that, compared with HFCLP, HNCLP with the electron-donating terminal of -NH2 has a long dipole moment and immobilize the interstitial I3-, and the N side of pyridine with high-density electron cloud enables strong passivation with undercoordinated Pb2+ ions. The experimental results confirm that HNCLP with optimized electronic configuration emerges strong passivation ability, greatly suppresses the nonradiative recombination of perovskite absorber, and remarkably improves the film crystal quality along with the extraction and transfer process of photogenerated carriers. The HNCLP-contained PSC exhibits a remarkable efficiency of 24.47%, and HNCLP helps to enhance the moisture-proof of perovskite film and device storage stability. Here, 5-chloro-2-hydroxypyridine derivatives with -F (HFCLP) and -NH2 (HNCLP) end groups are selected to realize the push-pull electronic structure configuration. The precise modulation of electron structure and the structure-activity relationship between electronic configuration and performance of the PSCs are explored.image
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