Thermal co-evaporated MoOx:Au thin films and its application as anode modifier in perovskite solar cells

D. Mateus Torres-Herrera*, Paola M. Moreno-Romero, Dagoberto Cabrera-German, Hugo J. Cortina-Marrero, Mérida Sotelo-Lerma, Hailin Hu

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

11 Citas (Scopus)

Resumen

Molybdenum oxide (MoOx) has been used as a suitable interfacial modifier for emergent solar cells. However, the relatively low electrical conductivity of such material requires a thickness less than 10 nm of MoOx, which may lead to an uncovered surface and reduce the effect of interfacial modification. In this work, MoO3 and Au powder were co-evaporated and MoOx:Au composite coatings with a thickness of 10–20 nm were obtained. They are highly transparent, more compact and conductive, and contain a higher percentage of MoO2 compound than MoOx films without Au. The composite films were co-evaporated on top of the hole transport layer (Spiro-MMeOTAD) in perovskite solar cells (PSCs). The insertion of a MoOx:Au composite film, with a thickness of 14.3 nm and an atomic concentration of 34% of Au, improves photovoltaic performance and stability of PSCs after 1000 h of storage in ambient conditions. It is concluded that a relatively thick MoOx:Au layer can work as an interfacial modifier to reduce the humidity and oxygen diffusion into perovskite layer and, at the same time, improve the charge transport in PSCs.

Idioma originalInglés
Páginas (desde-hasta)136-144
Número de páginas9
PublicaciónSolar Energy
Volumen206
DOI
EstadoPublicada - ago. 2020

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© 2020 International Solar Energy Society

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