Improved Interconnecting Layer for Perovskite–Organic Tandem Solar Cells
journal contribution
posted on 2025-09-30, 17:14 authored by Yun Xiao, Tianyu Huang, Nan Chen, Peng Chen, Deying Luo, Xin Jiang, Xiaohan Jia, Juntao Hu, Dengke Wang, Pascal Kaienburg, Suhas Mahesh, Anna Jungbluth, Rui Su, Congmeng Li, Qiang Lou, Chen Yang, Bingjun Wang, Irfan Habib, Hao Ye, Hang Zhou, Hui Li, Lei Meng, Xiaojun Li, Hongyu Yu, Moritz Riede, Zheng-Hong Lu, Rui Zhu, Henry J. SnaithMonolithic perovskite–organic tandem solar cells
(POTSCs)
have attracted considerable attention in recent years due to their
compatible fabrication routes and advances in single-cell efficiencies.
To further boost the performance of POTSCs, reducing the voltage losses
that mainly arise from wide bandgap (WBG, >1.7 eV) perovskite subcells
and interconnecting layers (ICLs) is critical. Here, a new ICL with
a configuration of C<sub>60</sub>/YbO<sub><i>x</i></sub>/Au/MoO<sub><i>x</i></sub> is demonstrated for constructing
the monolithic POTSC. The YbO<sub><i>x</i></sub>-based ICL
benefits from an ohmic contact and high transparency, resulting in
improved POSTC performance. The champion device presents a PCE of
23.2% owing to a high <i>V</i><sub>OC</sub> of 2.11 V (approximately
equal to the sum of individual <i>V</i><sub>OC</sub>’s
of the subcells) without compromising the short-circuit current density
and fill factors. This work opens an avenue for developing efficient
ICLs in POTSCs.
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