Author
Listed:
- Jingnan Wang
(Chinese Academy of Sciences
School of Materials Science and Chemical Engineering Ningbo University
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences)
- Boxin Jiao
(Tsinghua University)
- Ruijia Tian
(Chinese Academy of Sciences)
- Kexuan Sun
(Chinese Academy of Sciences)
- Yuanyuan Meng
(Chinese Academy of Sciences)
- Yang Bai
(Chinese Academy of Sciences)
- Xiaoyi Lu
(Chinese Academy of Sciences)
- Bin Han
(Chinese Academy of Sciences)
- Ming Yang
(Chinese Academy of Sciences)
- Yaohua Wang
(Chinese Academy of Sciences)
- Shujing Zhou
(Chinese Academy of Sciences)
- Haibin Pan
(Chinese Academy of Sciences)
- Zhenhuan Song
(Chinese Academy of Sciences)
- Chuanxiao Xiao
(Chinese Academy of Sciences)
- Chang Liu
(Chinese Academy of Sciences
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences)
- Ziyi Ge
(Chinese Academy of Sciences
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences)
Abstract
The interfacial contact between NiOx and self-assembled monolayers (SAMs) in wide-bandgap (WBG) subcells limits the efficiency and stability of all-perovskite tandem solar cells (TSCs). The strongly acidic phosphoric acid (PA) anchors in common PA-SAMs corrode reactive NiOx, undermining device stability. Moreover, SAM aggregation leads to interfacial losses and significant open-circuit voltage (VOC) deficits. Here, we introduce boric acid (BA) as a milder anchoring group that chemisorbs onto NiOx via strong – $${{\rm{BO}}}_2{\mbox{-}}$$ BO 2 - –Ni coordination. A benzothiophene-fused head group enhances interfacial bonding through S–Ni orbital interactions, yielding higher binding energy than PA-SAMs. This design also promotes homogeneous SAM formation without aggregation. Resultantly, the WBG cell exhibits an improved PCE to 20.1%. When integrated with narrow bandgap (NBG) subcell, the two-terminal (2T) TSCs achieve an ameliorative PCE of 28.5% and maintain 90% of the initial PCE after maximum power point tracking (MPP) under 1 sun illumination for 500 h.
Suggested Citation
Jingnan Wang & Boxin Jiao & Ruijia Tian & Kexuan Sun & Yuanyuan Meng & Yang Bai & Xiaoyi Lu & Bin Han & Ming Yang & Yaohua Wang & Shujing Zhou & Haibin Pan & Zhenhuan Song & Chuanxiao Xiao & Chang Liu, 2025.
"Less-acidic boric acid-functionalized self-assembled monolayer for mitigating NiOx corrosion for efficient all-perovskite tandem solar cells,"
Nature Communications, Nature, vol. 16(1), pages 1-14, December.
Handle:
RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59515-6
DOI: 10.1038/s41467-025-59515-6
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