Characterization of methylammonium lead iodide perovskite solar cells by surface morphology changes

Taewon Chung, Seongtak Kim, Soohyun Bae, Sang Won Lee, Kyungjin Cho, Seunghun Lee, Yoon Mook Kang, Haeseok Lee, Donghwan Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Organic-inorganic halide Perovskite solar cells have extremely high power conversion efficiencies of 22.1%, as officially recognized by the US National Renewable Energy Laboratory (NREL). These solar cells are therefore attractive candidates for use in next generation photovoltaic applications. Perovskite materials for incorporation into solar cells are prepared by a two-step solution fabrication process to generate polycrystalline structures with diverse grain sizes. PbI2 is the main material used in the synthesis of organic-inorganic hybrid perovskite, particularly when the sequential deposition method is employed, as it facilitates the formation of a well-organized perovskite layer. To improve the performance of these devices, the properties of PbI2 properties need to be investigated. We therefore examined the effects of PbI2 concentration in mesoporous perovskite solar cells prepared using a two-step solution deposition method. Samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis spectrometry, and atomic force microscopy (AFM). The results of this work confirm the importance of the PbI2 layer in high efficiency perovskite solar cells.

Original languageEnglish
Pages (from-to)4817-4821
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume17
Issue number7
DOIs
Publication statusPublished - 2017

Keywords

  • PbI
  • Perovskite
  • Perovskite Solar Cell
  • Solar Cell

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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