Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Jun;35(22):e2300352.
doi: 10.1002/adma.202300352. Epub 2023 Apr 21.

Improved Carrier Management via a Multifunctional Modifier for High-Quality Low-Bandgap Sn-Pb Perovskites and Efficient All-Perovskite Tandem Solar Cells

Jincheng Luo  1 , Rui He  1 , Huagui Lai  2 , Cong Chen  1 , Jingwei Zhu  1 , Yuliang Xu  1 , Fang Yao  3 , Tianshu Ma  4 , Yi Luo  1 , Zongjin Yi  1 , Yiting Jiang  1 , Zhiyu Gao  1 , Juncheng Wang  1 , Wenwu Wang  1 , Hao Huang  5 , Ye Wang  6 , Shengqiang Ren  1 , Qianqian Lin  3 , Changlei Wang  4 , Fan Fu  2 , Dewei Zhao  1
Affiliations

Improved Carrier Management via a Multifunctional Modifier for High-Quality Low-Bandgap Sn-Pb Perovskites and Efficient All-Perovskite Tandem Solar Cells

Jincheng Luo et al. Adv Mater. 2023 Jun.

Abstract

All-perovskite tandem solar cells (TSCs) hold great promise in terms of ultrahigh efficiency, low manufacturing cost, and flexibility, stepping forward to the next-generation photovoltaics. However, their further development is hampered by the relatively low performance of low-bandgap (LBG) tin (Sn)-lead (Pb) perovskite solar cells (PSCs). Improving the carrier management, including suppressing trap-assisted non-radiative recombination and promoting carrier transfer, is of great significance to enhance the performance of Sn-Pb PSCs. Herein, a carrier management strategy is reported for using cysteine hydrochloride (CysHCl) simultaneously as a bulky passivator and a surface anchoring agent for Sn-Pb perovskite. CysHCl processing effectively reduces trap density and suppresses non-radiative recombination, enabling the growth of high-quality Sn-Pb perovskite with greatly improved carrier diffusion length of >8 µm. Furthermore, the electron transfer at the perovskite/C60 interface is accelerated due to the formation of surface dipoles and favorable energy band bending. As a result, these advances enable the demonstration of champion efficiency of 22.15% for CysHCl-processed LBG Sn-Pb PSCs with remarkable enhancement in both open-circuit voltage and fill factor. When paired with a wide-bandgap (WBG) perovskite subcell, a certified 25.7%-efficient all-perovskite monolithic tandem device is further demonstrated.

Keywords: all-perovskite tandem solar cells; carrier management; defect passivation; electron transfer; low-bandgap perovskites.

PubMed Disclaimer

References

    1. J. Huang, Y. Yuan, Y. Shao, Y. Yan, Nat. Rev. Mater. 2017, 2, 17042.
    1. H. Min, D. Y. Lee, J. Kim, G. Kim, K.-S. Lee, J. Kim, M. J. Paik, Y. K. Kim, K. S. Kim, M. G. Kim, T. J. Shin, S. I. Seok, Nature 2021, 598, 444.
    1. R. Azmi, E. Ugur, A. Seitkhan, F. Aljamaan, A. S. Subbiah, J. Liu, G. T. Harrison, M. I. Nugraha, M. K. Eswaran, M. Babics, Y. Chen, F. Xu, T. G. Allen, A. U. Rehman, C.-L. Wang, T. D. Anthopoulos, U. Schwingenschlogl, M. De Bastiani, E. Aydin, S. De Wolf, Science 2022, 376, 73.
    1. R. Lin, J. Xu, M. Wei, Y. Wang, Z. Qin, Z. Liu, J. Wu, K. Xiao, B. Chen, S. M. Park, G. Chen, H. R. Atapattu, K. R. Graham, J. Xu, J. Zhu, L. Li, C. Zhang, E. H. Sargent, H. Tan, Nature 2022, 603, 73.
    1. T. Leijtens, K. A. Bush, R. Prasanna, M. D. McGehee, Nat. Energy 2018, 3, 828.

LinkOut - more resources