All-perovskite tandem solar cells with 3D/3D bilayer perovskite heterojunction

Renxing Lin, Yurui Wang, Qianwen Lu, Beibei Tang, Jiayi Li, Han Gao, Yuan Gao, Hongjiang Li, Changzeng Ding, Jin Wen, Pu Wu, Chenshuaiyu Liu, Siyang Zhao, Ke Xiao, Zhou Liu, Changqi Ma, Yu Deng, Ludong Li, Fengjia Fan and Hairen Tan ()
Additional contact information
Renxing Lin: Nanjing University
Yurui Wang: Nanjing University
Qianwen Lu: Nanjing University
Beibei Tang: University of Science and Technology of China
Jiayi Li: Nanjing University
Han Gao: Nanjing University
Yuan Gao: Nanjing University
Hongjiang Li: Nanjing University
Changzeng Ding: Chinese Academy of Sciences (CAS)
Jin Wen: Nanjing University
Pu Wu: Nanjing University
Chenshuaiyu Liu: Nanjing University
Siyang Zhao: Nanjing University
Ke Xiao: Nanjing University
Zhou Liu: Nanjing University
Changqi Ma: Chinese Academy of Sciences (CAS)
Yu Deng: Nanjing University
Ludong Li: Nanjing University
Fengjia Fan: University of Science and Technology of China
Hairen Tan: Nanjing University

Nature, 2023, vol. 620, issue 7976, 994-1000

Abstract: Abstract All-perovskite tandem solar cells promise higher power-conversion efficiency (PCE) than single-junction perovskite solar cells (PSCs) while maintaining a low fabrication cost1–3. However, their performance is still largely constrained by the subpar performance of mixed lead–tin (Pb–Sn) narrow-bandgap (NBG) perovskite subcells, mainly because of a high trap density on the perovskite film surface4–6. Although heterojunctions with intermixed 2D/3D perovskites could reduce surface recombination, this common strategy induces transport losses and thereby limits device fill factors (FFs)7–9. Here we develop an immiscible 3D/3D bilayer perovskite heterojunction (PHJ) with type II band structure at the Pb–Sn perovskite–electron-transport layer (ETL) interface to suppress the interfacial non-radiative recombination and facilitate charge extraction. The bilayer PHJ is formed by depositing a layer of lead-halide wide-bandgap (WBG) perovskite on top of the mixed Pb–Sn NBG perovskite through a hybrid evaporation–solution-processing method. This heterostructure allows us to increase the PCE of Pb–Sn PSCs having a 1.2-µm-thick absorber to 23.8%, together with a high open-circuit voltage (Voc) of 0.873 V and a high FF of 82.6%. We thereby demonstrate a record-high PCE of 28.5% (certified 28.0%) in all-perovskite tandem solar cells. The encapsulated tandem devices retain more than 90% of their initial performance after 600 h of continuous operation under simulated one-sun illumination.

Date: 2023
References: Add references at CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
https://www.nature.com/articles/s41586-023-06278-z Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:620:y:2023:i:7976:d:10.1038_s41586-023-06278-z

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/s41586-023-06278-z

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().