Lead acetate (PbAc2)-derived and chloride-doped MAPbI3 solar cells with high fill factor resulting from optimized charge transport and trap state properties

[Display omitted] •Improved charge transport (carrier mobility almost 4 times improved) is demonstrated in PbAc2-derived MAPbI3 films via MAClor CdCl2 addition.•Chloride additives influence the crystallization in PbAc2-based precursor system.•Some Cl ions remain in the final MAPbI3 films, passivatin...

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Bibliographic Details
Published in:Solar energy 2021-11, Vol.228, p.129-139
Main Authors: Tsiba Matondo, Jadel, Malouangou, Maurice Davy, Wu, Jiawei, Bai, Luyun, Yang, Yifan, Zhang, Yujing, Pan, Jiahong, Cai, Molang, Mbumba, Manala Tabu, Waleed Akram, Muhammad, Guli, Mina
Format: Article
Language:English
Subjects:
Additives
Boundaries
Carrier mobility
Carrier transport
Charge carrier transport
Charge transport
Chloride ions
Chlorides
Crystallites
Crystals
Current carriers
Defect state passivation
Fill factor
Grain boundaries
Iodides
Lead acetate
Lead acetates
Low temperature
Perovskite solar cell
Perovskites
Photovoltaic cells
Photovoltaics
Pinholes
Solar cells
Solar energy
Trap states
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Summary:[Display omitted] •Improved charge transport (carrier mobility almost 4 times improved) is demonstrated in PbAc2-derived MAPbI3 films via MAClor CdCl2 addition.•Chloride additives influence the crystallization in PbAc2-based precursor system.•Some Cl ions remain in the final MAPbI3 films, passivating the carrier trap states.•Device FF is correlated to the charge transport in the MAPbI3 layer and improved values up to 82% are achieved.•Cl-doping improves the PbAc2-based MAPbI3 films and device ambient stability. Lead acetate (PbAc2) offers exceptional advantages as lead (Pb2+) source for solution processing of homogeneous and pinholes-free MAPbX3 perovskite films over large areas at low temperatures for photovoltaic applications. However, PbAc2-derived MAPbI3 films usually exhibit small crystallites (
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2021.09.010