Journal Article

IMPULSE-2024-00101

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multifunctional Buried Interface Modification Enables Efficient Tin Perovskite Solar Cells

Chen, Y. ; Qi, H. ; Wang, K. (Corresponding author) ; Kang, Z. ; Pan, G. ; Everett, C. R. ; Müller-Buschbaum, P.MLZ* ; Tong, Y. (Corresponding author) ; Wang, H. (Corresponding author)

2024
WILEY-VCH Verlag GmbH & Co. KGaA Weinheim

Please use a persistent id in citations: doi:10.1002/smtd.202300029

Abstract: Tin perovskite solar cells (PSCs) are considered promising candidates to promote lead-free perovskite photovoltaics. However, their power conversion efficiency (PCE) is limited by the easy oxidation of Sn2+ and low quality of tin perovskite film. Herein, an ultra-thin 1-carboxymethyl-3-methylimidazolium chloride (ImAcCl) layer is used to modify the buried interface in tin PSCs, which can induce multifunctional improvements and remarkably enhance the PCE. The carboxylate group (CO) and the hydrogen bond donor (NH) in ImAcCl can interact with tin perovskites, thus significantly suppressing the oxidation of Sn2+ and reducing the trap density in perovskite films. The interfacial roughness is reduced, which contributes to a high-quality tin perovskite film with increased crystallinity and compactness. In addition, the buried interface modification can modulate the crystal dimensionality, favoring the formation of large bulk-like crystals instead of low-dimensional ones in tin perovskite films. Therefore, the charge carrier transport is effectively promoted and the charge carrier recombination is suppressed. Eventually, tin PSCs show a remarkably enhanced PCE from 10.12% to 12.08%. This work highlights the importance of buried interface engineering and provides an effective way to realize efficient tin PSCs.

Keyword(s): Energy (1st) ; Chemistry (2nd) ; Industrial Application (2nd) ; Materials Science (2nd)

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Contributing Institute(s):

1. E13 (E13)
2. MLZ (MLZ)

Experiment(s):

1. DNS: Diffuse scattering neutron time of flight spectrometer (NL6S)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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