Enhanced crystallization and performance of formamidinium lead triiodide perovskite solar cells through PbI2-SrCl2 modulation

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

3 Scopus Citations
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Author(s)

  • Huan Wang
  • Hua Zhang
  • Chu-Chen Chueh
  • Ting Zhao
  • Chenyi Mao
  • Wei Chen

Detail(s)

Original languageEnglish
Pages (from-to)239-245
Journal / PublicationMaterials Today Energy
Volume7
Early online date9 Oct 2017
Publication statusPublished - Mar 2018

Abstract

An innovative strategy using strontium chloride (SrCl2) as an additive to modulate the crystallization of formamidinium lead triiodide perovskite was developed in a sequential two-step deposition. The results from structural, elemental, and morphological analyses reveal that the SrCl2 additive is capable of improving the quality and morphology of the pre-deposited PbI2 layer by forming a PbI2-SrCl2 interphase complex through plausible solid-solid interactions. This modulates the subsequent reaction between PbI2 and formamidinium iodide (FAI) to enhance the crystallinity of the prepared perovskite film with denser and larger grain domains. The concomitantly enhanced optoelectronic properties of the SrCl2-derived perovskite film enables an improved power conversion efficiency (PCE) of 18.44% with good reproducibility, which surpasses the performance (PCE: 15.94%) of the control device without SrCl2. This work demonstrates a useful methodology to modulate the morphology and quality of perovskites through solid-solid interactions for achieving high-performance solar cells.

Research Area(s)

  • Device performance, Formamidinium lead triiodide perovskite, Morphology modulation, Strontium chloride, Two-step deposition

Citation Format(s)

Enhanced crystallization and performance of formamidinium lead triiodide perovskite solar cells through PbI2-SrCl2 modulation. / Wang, Huan; Zhang, Hua; Chueh, Chu-Chen; Zhao, Ting; Mao, Chenyi; Chen, Wei; Jen, Alex K.-Y.

In: Materials Today Energy, Vol. 7, 03.2018, p. 239-245.

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