Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Ion Migration in Organic Metal Halide Perovskites

유기 금속 할라이드 페로브스카이트에서 이온 이동

  • Oh, Ilwhan (Department of Applied Chemistry and IT Convergence Engineering, Kumoh National Institute of Technology)
  • 오일환 (금오공과대학교 응용화학과 및 IT 융복합공학과)
  • Received : 2018.02.01
  • Accepted : 2018.04.24
  • Published : 2018.05.31
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Abstract

In this review, recent researches on ion transport phenomena in organic metal halide perovskite materials, which have been popular all over the world, are summarized. Although different results have been reported depending on the perovskite material composition and applied voltage, iodide seems to migrate under actual solar cell operating conditions, and occasionally methylammonium migration is observed. Perovskite is a so-called mixed conductor in which electrons and ions move simultaneously at room temperature, which greatly influences the hysteresis of the perovskite solar cell current-voltage curve and the performance degradation due to long-term operation.

본 총설에서는 최근 전세계적으로 각광 받고 있는 유기 금속 할라이드 페로브스카이트 소재에서 일어나는 이온 이동 현상에 대한 최신 연구에 대해 정리하였다. 페로브스카이트 물질 조성, 인가전압에 따라 다른 결과들이 보고되었지만, 실제 태양전지 작동 조건에서 iodide 가 이동하는 것으로 보이며, 때로는 methylammonium의 이동도 관찰된다. 페로브스카이트는 상온에서 전자와 이온이 동시에 이동하는 이른바 mixed conductor이고, 이는 페로브스카이트 태양전지 전류-전압곡선의 hysteresis, 장시간 작동에 따른 성능 저하 등에 지대한 영향을 미친다.

Keywords

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