Directional Transformation of Heterometallic Oxo Clusters: A New Approach to Prepare Wide-Bandgap Cathode Interlayers for Perovskite Solar Cells

Guo-Bin Xiao; Xijiao Mu; Shuyu Zhou; Liu Zhu; Yong Peng; Qing Liang; Xiaoxin Zou; Jian Zhang; Lei Zhang; Jing Cao

doi:10.1002/anie.202218478

Directional Transformation of Heterometallic Oxo Clusters: A New Approach to Prepare Wide-Bandgap Cathode Interlayers for Perovskite Solar Cells

Angew Chem Int Ed Engl. 2023 Apr 17;62(17):e202218478. doi: 10.1002/anie.202218478. Epub 2023 Mar 3.

Authors

Guo-Bin Xiao¹, Xijiao Mu¹, Shuyu Zhou², Liu Zhu³, Yong Peng³, Qing Liang⁴, Xiaoxin Zou⁵, Jian Zhang², Lei Zhang^{2

6}, Jing Cao¹

Affiliations

¹ State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
² State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.
³ School of Materials and Energy & Electron Microscopy Centre of Lanzhou University, Lanzhou University, Lanzhou, 730000, P. R. China.
⁴ Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.
⁵ Key State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
⁶ Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300350, P. R. China.

PMID: 36789747
DOI: 10.1002/anie.202218478

Abstract

Typical wide-band gap cathode interlayer materials are difficulty in reducing interface recombination without limiting charge transport in perovskite solar cells (PSCs). Here, a lead-doped titanium-oxo cluster protected by S-containing ligands is introduced at the interface of perovskite and SnO₂ . By in situ heating, the cluster is transformed into PbSO₄ -PbTi₃ O₇ heterostructure. The oxygen atoms from sulfate ion in heterostructure connect with iodine from perovskite to boost interfacial electron extraction and reduce charge recombination. While the yielded metallic interface between PbSO₄ and PbTi₃ O₇ promotes the electron transport across the interface. Finally, an efficiency as high as 24.2 % for the modified PSC is obtained. The heterostructure well-stabilize the interface of perovskite and SnO₂ , to greatly improve the device stability. This work provides a novel strategy to prepare wide-band gap cathode interlayer by directional transformation of heterometallic oxo clusters.

Keywords: Cathode Interlayer; Oxo Cluster; Perovskite; Solar Cells; Wide Band Gap.

Abstract

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