Low temperature fabrication of formamidinium based perovskite solar cells with enhanced performance by chlorine incorporation

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

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Detail(s)

Original languageEnglish
Pages (from-to)144-149
Journal / PublicationOrganic Electronics: physics, materials, applications
Volume38
Publication statusPublished - 1 Nov 2016

Abstract

Recently formamidinium (FA) based perovskite solar cell was demonstrated to show high performance and better stability upon partial substitution of FA with Cs cation. However, the fabrication of device required high-temperature processing on TiO2 electrode and thus limits the use of flexible polymeric substrates. Here, we present a low temperature approach for the fabrication of p-i-n perovskite solar cells based on Cs0.15FA0.85PbI3. Furthermore, we investigated the effects of chlorine on the morphology and crystallinity of the perovskite films and the corresponding photovoltaic performance. Chlorine incorporation can significantly enlarge the size of grains and improve the crystallinity of perovskite films with full surface coverage. A best power conversion efficiency of 14.5% was realized for planar perovskite solar cells with negligible hysteresis and remarkable reproducibility.

Research Area(s)

  • Chlorine incorporation, Formamidinium, Grain size, Low temperature, Perovskite solar cells

Citation Format(s)