Improving Performance of Lead‐Free Formamidinium Tin Triiodide Perovskite Solar Cells by Tin Source Purification | Zendy

Gu Feidan | Zendy; Ye Senyun | Zendy; Zhao Ziran | Zendy; Rao Haixia | Zendy; Liu Zhiwei | Zendy; Bian Zuqiang | Zendy; Huang Chunhui | Zendy

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Improving Performance of Lead‐Free Formamidinium Tin Triiodide Perovskite Solar Cells by Tin Source Purification

Author(s) -

Gu Feidan,

Ye Senyun,

Zhao Ziran,

Rao Haixia,

Liu Zhiwei,

Bian Zuqiang,

Huang Chunhui

Publication year - 2018

Publication title -

solar rrl

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.544

H-Index - 37

ISSN - 2367-198X

DOI - 10.1002/solr.201800136

Subject(s) - tin , triiodide , formamidinium , energy conversion efficiency , materials science , perovskite (structure) , lead (geology) , chemical engineering , inorganic chemistry , chemistry , metallurgy , optoelectronics , crystallography , electrode , dye sensitized solar cell , engineering , geomorphology , electrolyte , geology

Lead (Pb)‐free tin (Sn)‐based perovskite solar cells (PSCs) have been recognized as one of the solutions to the toxicity of Pb and drawn considerable attention. However, Sn 4+ caused by oxidation or incomplete reduction during synthesis severely deteriorates the device performance. Herein, the authors firstly reveal that the addition of Sn powder into the FASnI 3 (FANH 2 CHNH 2 + ) precursor solution prepared from SnI 2 with 99% purity leads to great improvement of the device performance with a maximum power conversion efficiency (PCE) of 6.75%, which is, to the best of their knowledge, the highest efficiency among those of the FASnI 3 ‐based PSCs with SnF 2 as the only additive, comparable to and even higher than the device fabricated from SnI 2 with a high purity of 99.999%.

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