Mixed Cation FAxPEA1– xPbI3 with Enhanced Phase and Ambient Stability toward High-Performance Perovskite Solar Cells

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

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Author(s)

  • Nan Li
  • Zonglong Zhu
  • Chu-Chen Chueh
  • Hongbin Liu
  • Bo Peng
  • Alessio Petrone
  • Xiaosong Li
  • Liduo Wang

Detail(s)

Original languageEnglish
Article number1601307
Journal / PublicationAdvanced Energy Materials
Volume7
Issue number1
Publication statusPublished - 11 Jan 2017
Externally publishedYes

Abstract

In this work, different from the commonly explored strategy of incorporating a smaller cation, MA+ and Cs+ into FAPbI3 lattice to improve efficiency and stability, it is revealed that the introduction of phenylethylammonium iodide (PEAI) into FAPbI3 perovksite to form mixed cation FAxPEA1–xPbI3 can effectively enhance both phase and ambient stability of FAPbI3 as well as the resulting performance of the derived devices. From our experimental and theoretical calculation results, it is proposed that the larger PEA cation is capable of assembling on both the lattice surface and grain boundaries to form quais-3D perovskite structures. The surrounding of PEA+ ions at the crystal grain boundaries not only can serve as molecular locks to tighten FAPbI3 domains but also passivate the surface defects to improve both phase and moisture stablity. Consequently, a high-performance (PCE:17.7%) and ambient stable FAPbI3 solar cell could be developed.

Research Area(s)

  • ambient stability, formamidinium lead iodide, perovskite solar cells, phase stability

Citation Format(s)

Mixed Cation FAxPEA1– xPbI3 with Enhanced Phase and Ambient Stability toward High-Performance Perovskite Solar Cells. / Li, Nan; Zhu, Zonglong; Chueh, Chu-Chen; Liu, Hongbin; Peng, Bo; Petrone, Alessio; Li, Xiaosong; Wang, Liduo; Jen, Alex K.-Y.

In: Advanced Energy Materials, Vol. 7, No. 1, 1601307, 11.01.2017.

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