Application of Lead Acetate Additive for Printable Perovskite Solar Cell

doi:10.15541/jim20210538

Abstract

Abstract: Printable perovskite solar cells employ a device structure for which the organic-inorganic perovskite absorber is hosted by an inorganic mesoporous scaffold. Its advantages include simple fabrication process, low material cost and relatively high stability. However, it is challenging to homogeneously deposit high-quality perovskite crystals on the mesoporous scaffold. Herein, by incorporating lead acetate (Pb(Ac)₂) in the typical perovskite precursor, methylamine lead iodine (MAPbI₃), the crystal growth and pore-filling of the perovskite crystals in the mesoporous scaffold is improved by facilitating the crystal nucleation. Meanwhile, Ac^- and MA⁺ form MAAc which releases during thermal annealing process, resulting in excess PbI₂ in the perovskite layer which passivates the grain boundaries. By incorporating 1% molar ratio of Pb(Ac)₂ in the perovskite precursor, a power conversion efficiency of 15.42% is obtained for printable perovskite solar cells. This indicates that it is feasible to enhance the performance of printable perovskite solar cells by employing additives to tune the crystallization of the perovskite absorbers.

Key words: organic-inorganic perovskite, solar cell, lead acetate, crystallization regulation, nucleation crystal growth

CLC Number:

TQ174

MING Yue, HU Yue, MEI Anyi, RONG Yaoguang, HAN Hongwei. Application of Lead Acetate Additive for Printable Perovskite Solar Cell[J]. Journal of Inorganic Materials, 2022, 37(2): 197-203.

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