Phenothiazine-Based Hole-Transporting Materials toward Eco-friendly Perovskite Solar Cells

Salunke, Jagadish; Guo, Xing; Lin, Zhenhua; R. Vale, João; R. Candeias, Nuno; Nyman, Mathias; Dahlström, Staffan; Österbacka, Ronald; Priimägi, Arri; Chang, Jingjing; Vivo, Paola (2019)
 
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Salunke, Jagadish
Guo, Xing
Lin, Zhenhua
R. Vale, João
R. Candeias, Nuno
Nyman, Mathias
Dahlström, Staffan
Österbacka, Ronald
Priimägi, Arri
Chang, Jingjing
Vivo, Paola
2019


doi:10.1021/acsaem.9b00408
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https://urn.fi/URN:NBN:fi:tty-201906281917

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Peer reviewed
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Organic hole-transporting materials (HTMs), AZO-I and AZO-II, were synthesized via Schiff base chemistry by functionalizing a phenothiazine core with triarylamine(s) through azomethine bridges. Substantial enhancements in the power conversion efficiency (PCE = 12.6% and 14% for AZO-I and AZO-II, respectively) and stability (68% or 91% of PCE retained after 60 days for AZO-I or AZO-II, respectively) of perovskite solar cells (PSCs) were achieved when switching from mono- (AZO-I) to disubstituted (AZO-II) HTMs. The extremely low production costs (9 and 12 $/g for AZO-I and AZO-II, respectively), together with the Pd-catalyst-free synthesis, make these materials excellent candidates for low-cost and eco-friendly PSCs.
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