Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Haochen Fan
  • Jie Zhang
  • Jin-Hua Huang
  • Pengcheng Wang
  • Caiyan Gao
  • Lian-Ming Yang
  • Yanlin Song
  • Ke-Jian Jiang

Detail(s)

Original languageEnglish
Article number1900285
Journal / PublicationSolar RRL
Volume3
Issue number8
Online published19 Jul 2019
Publication statusPublished - Sep 2019

Abstract

The deposition of a uniform and dense tin-based perovskite layer with low defect-caused background carrier density is crucial for achieving efficient tin perovskite solar cells (PSCs). These defects are mainly caused by the rapid oxidation of Sn2+ to Sn4+ in tin perovskite during device fabrication. Herein, trihydrazine dihydriodide ((N2H4)3(HI)2) is used as an additive for solution deposition of a formamidinium tin iodide (FASnI3) perovskite layer. The resultant FASnI3 layer is homogeneous with full surface coverage; moreover, the content of Sn4+ is significantly reduced in the film from the SnI2 precursor owing to the reductive property of (N2H4)3(HI)2. With the high-quality FASnI3 layer as a light absorber, planar-heterojunction perovskite solar cells are fabricated, exhibiting a maximum power conversion efficiency of 8.48% and good reproducibility. This work opens new possibilities for achieving efficient lead-free tin-based perovskite solar cells.

Research Area(s)

  • lead-free, morphology, perovskite solar cell, trihydrazine dihydriodide, HALIDE PEROVSKITES, PERFORMANCE, STABILITY, FILMS

Citation Format(s)

Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells. / Li, Fengzhu; Fan, Haochen; Zhang, Jie; Huang, Jin-Hua; Wang, Pengcheng; Gao, Caiyan; Yang, Lian-Ming; Zhu, Zonglong; Jen, Alex K.-Y.; Song, Yanlin; Jiang, Ke-Jian.

In: Solar RRL, Vol. 3, No. 8, 1900285, 09.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review