TY - JOUR
T1 - Thermal co-evaporated MoOx:Au thin films and its application as anode modifier in perovskite solar cells
AU - Torres-Herrera, D. Mateus
AU - Moreno-Romero, Paola M.
AU - Cabrera-German, Dagoberto
AU - Cortina-Marrero, Hugo J.
AU - Sotelo-Lerma, Mérida
AU - Hu, Hailin
N1 - Publisher Copyright:
© 2020 International Solar Energy Society
PY - 2020/8
Y1 - 2020/8
N2 - 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.
AB - 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.
KW - Interfacial modifier
KW - MoO:Au composite films
KW - Perovskite solar cells
KW - Thermal co-evaporation
UR - http://www.scopus.com/inward/record.url?scp=85085957243&partnerID=8YFLogxK
U2 - 10.1016/j.solener.2020.05.105
DO - 10.1016/j.solener.2020.05.105
M3 - Artículo
AN - SCOPUS:85085957243
SN - 0038-092X
VL - 206
SP - 136
EP - 144
JO - Solar Energy
JF - Solar Energy
ER -