論文

査読有り
2019年

Structured crystallization for efficient all-inorganic perovskite solar cells with high phase stability

Journal of Materials Chemistry A
  • Zhen Wang
  • ,
  • Ajay K. Baranwal
  • ,
  • Muhammad Akmal Kamarudin
  • ,
  • Yusuke Kamata
  • ,
  • Chi Huey Ng
  • ,
  • Manish Pandey
  • ,
  • Tingli Ma
  • ,
  • Shuzi Hayase

7
35
開始ページ
20390
終了ページ
20397
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1039/C9TA05556H
出版者・発行元
Royal Society of Chemistry ({RSC})

© The Royal Society of Chemistry 2019. All-inorganic perovskites suffer from a phase transition from a cubic α-phase to a tetragonal δ-phase in the ambient atmosphere, although they have the advantage of higher thermal stability. Here, we demonstrated that yttrium-induced perovskite crystallization results in significantly improved phase stability of perovskite even under humid air conditions. Yttrium in precursors was found to impede the crystal growth of perovskite film to stabilize the α-phase of a CsPbI2Br phase and was finally incorporated into the CsPbI2Br perovskite lattice. This structural crystallization process induced by yttrium incorporation gave rise to denser compact films with small grains and host lattice rearrangement by partial substitution for Pb. As a result, a 360-fold phase stability improvement was achieved in humid air with 65% RH compared with the reference film. The favorable electronic structure for efficient electron-hole dissociation and carrier transport to the cathode led to a much-enhanced power conversion efficiency (PCE) of 13.25% after yttrium incorporation compared with only 8.46% for the reference cells in humid air. Moreover, yttrium-incorporated perovskite solar cells (PSCs) without encapsulation exhibited superior long-term stability when stored in ambient air with 65% RH, showing nearly no degradation over 14 h.

リンク情報
DOI
https://doi.org/10.1039/C9TA05556H
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072220399&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85072220399&origin=inward
ID情報
  • DOI : 10.1039/C9TA05556H
  • ISSN : 2050-7488
  • eISSN : 2050-7496
  • ORCIDのPut Code : 60845620
  • SCOPUS ID : 85072220399

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