Mixed Sulfur and Iodide-Based Lead-Free Perovskite Solar Cells

Authors:
Publisher website
Google Scholar
Abstract
Fully halide perovskite structures can only host inorganic metal cations such as Pb2+, Sn2+, and Ge2+ in the 2+ valence state to satisfy charge neutrality. This requirement limits the use of high-er-valence cations in preparing new types of perovskite materials for solar cells. Mixed chalcogenides and halides as anions in a perovskite structure, can enable the introduction of 3+ and 4+ charged cations in the place of the 2+ metal cations. Herein we report for the first time on the fabrication of solar cells exploiting methylammonium antimony sulfur diiodide (MASbSI2) perov-skite structures, as light harvesters. The MASbSI2 was prepared by solution processing, followed by annealing under mild tem-perature conditions, via a sequential reaction between antimony trisulfide (Sb2S3), which is deposited by the chemical bath depo-sition (CBD) method, antimony triiodide (SbI3), and me-thylammonium iodide (MAI) onto a mesoporous TiO2 electrode. After applying MAI onto SbSI, a MASbSI2 perovskite layer was formed by annealing at 150 °C in an argon atmosphere. The solar cells fabricated using MASbSI2 exhibited power conversion effi-ciencies (PCE) of 3.11%, under the standard illumination condi-tions of 100 mW/cm2. The unencapsulated device retained more than 90% of its initial PCE for over one month, during storage under ambient conditions with 60% humidity.
Funding Information
  • LG Display
  • Ulsan National Institute of Science and Technology (1.160097.01/2.160482.01)
  • National Research Foundation of Korea (2016R1A5A1009926, NRF- 2015M1A2A2056542, NRF- 2016M3A6A7945503, NRF-2011-0031565)
  • Korea Institute of Science and Technology (1.160097.01/2.160482.01)

This publication has 38 references indexed in Scilit: