Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 1, Pages 546-555Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b16341
Keywords
chemical p-doping; heterogeneous reactions; hole transport materials; interfacial charge recombination; perovskite solar cells
Funding
- National Natural Science Foundation of China [21873025, 21571042, 51603055]
- Natural Science Foundation of Heilongjiang Province [QC2017055]
- China Postdoctoral Science Foundation [2016M601424, 2017T100236]
- Postdoctoral Foundation of Heilong-jiang Province [LBH-Z16059]
Ask authors/readers for more resources
Perovskite solar cells (PSCs) based on spiro-OMeTAD have achieved efficiencies greater than 20% in recent years; however, poorly designed dopants and ambiguous working mechanisms are still obstacles that restrict the process of commercialization. Various dopants have been introduced to modulate the electrical properties of spiro-OMeTAD, often accompanying some negative problems, such as complex synthetic routes and accelerated degradation of perovskite. Here, two novel metal organic complexes (Cu-2Cl and Cu-4Cl) with similar molecular fragments are designed and synthesized to investigate the effects on the chemical p-doping of spiro-OMeTAD. The unique coordination environment of copper ions and harmless oxidation byproducts make Cu-2Cl superior for oxidation of spiro-OMeTAD, and the possible synergetic mechanism of the heterogeneous reactions with Li-TFSI is also proposed. Utilizing Cu-2Cl-doped hole transport materials to fabricate PSCs will facilitate hole transport, reduce interfacial charge recombination, and passivate the trap states of perovskite, resulting in a champion efficiency of 20.97%. In addition, the intrinsic solid-state hydrophobic characteristics of Cu-2Cl nanoparticles well dispersed in the hole transport layer successfully suppress the invasion of water vapor, and the corresponding device retains 84% of its original efficiency after being stored for 720 h in ambient air condition.
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