posted on 2021-06-25, 20:13authored byHyunmin Jung, Geunjin Kim, Gyeong Sun Jang, Jihoo Lim, Moonyong Kim, Chan Su Moon, Xiaojing Hao, Nam Joong Jeon, Jae Sung Yun, Helen Hejin Park, Jangwon Seo
This report addresses indium oxide
doped with titanium and tantulum
with high near-infrared transparency to potentially replace the conventional
indium tin oxide transparent electrode used in semitransparent perovskite
devices and top cells of tandem devices. The high near-infrared transparency
of this electrode is possibly explained by the lower carrier concentration,
suggesting less defect sites that may sacrifice its optical transparency.
Incorporating this transparent electrode into semitransparent perovskite
solar cells for both the top and bottom electrodes improved the device
performance through possible reduction of interfacial defect sites
and modification in energy alignment. With this indium oxide-based
semitransparent perovskite top cell, we also demonstrated four-terminal
perovskite–silicon tandem configurations with improved photocurrent
response in the bottom silicon cell.