Journal article
Stabilizing interconnecting layers for all-perovskite tandem photovoltaics
- Abstract:
- Robust interconnecting layers are critical for all-perovskite tandems but are typically limited by acidic poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and interdiffusive gold, compromising stability. Here, we substitute PEDOT:PSS with a conjugated polyelectrolyte-modified bithiophene-triphenylamine small molecule as the hole transport layer for tin-lead perovskite subcells, ensuring superior hole extraction and interfacial robustness. The gold recombination junction is replaced with a 5-nm-thick sputtercoated indium-doped zinc oxide to eliminate metal diffusion and minimize parasitic absorption. This design yields certified efficiencies of 29.80% and 30.19% for double-junction tandems employing methylammonium (MA)-free and MA-containing narrow-band-gap subcells, respectively. Furthermore, 1.0-cm2 devices and 11.3-cm2 mini-modules show efficiencies up to 28.7% and 25.0%, respectively. Encouragingly, encapsulated tandems maintain 90% of their initial efficiency after over 770, 530, and 220 h of maximum power point tracking under illumination at 45◦C, 65◦C, and 85◦C, respectively. This work presents a viable route beyond PEDOT:PSS for narrow-band-gap perovskites toward reliable all-perovskite tandem photovoltaics.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Supplementary materials, pdf, 30.1KB, Terms of use)
-
(Preview, Version of record, pdf, 55.8KB, Terms of use)
-
- Publisher copy:
- 10.1016/j.joule.2026.102483
Authors
+ Taizhou Municipal Science and Technology Bureau
More from this funder
- Funder identifier:
- https://ror.org/041fzeq08
- Grant:
- 23gya05
- Programme:
- Science and Technology Plan Project
+ Huazhong University of Science and Technology
More from this funder
- Funder identifier:
- https://ror.org/00p991c53
- Grant:
- 2025BRB016
- Programme:
- Fundamental Research Support Program
+ China Postdoctoral Science Foundation
More from this funder
- Funder identifier:
- https://ror.org/0426zh255
- Grant:
- 2024M751002
- 2023M731172
- GZC20240528
+ Optics Valley Laboratory
More from this funder
- Funder identifier:
- https://ror.org/01mf47c71
- Grant:
- OVL2021BG008
+ Ministry of Science and Technology of China
More from this funder
- Funder identifier:
- https://ror.org/027s68j25
- Grant:
- 2021YFB3800104
- Publisher:
- Cell Press
- Journal:
- Joule More from this journal
- Article number:
- 102483
- Publication date:
- 2026-05-13
- Acceptance date:
- 2026-04-20
- DOI:
- EISSN:
-
2542-4351
- ISSN:
-
2542-4785
- Language:
-
English
- Keywords:
- Pubs id:
-
2419815
- Local pid:
-
pubs:2419815
- Deposit date:
-
2026-05-14
- ARK identifier:
Terms of use
- Copyright holder:
- Elsevier Inc.
- Copyright date:
- 2026
- Rights statement:
- ©2026 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
- Notes:
- The author accepted manuscript (AAM) of this paper has been made available under the University of Oxford's Open Access Publications Policy, and a CC BY public copyright licence has been applied.
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record