論文

査読有り
2019年8月9日

Strain Relaxation and Light Management in Tin–Lead Perovskite Solar Cells to Achieve High Efficiencies

ACS Energy Letters
  • Gaurav Kapil
  • ,
  • Takeru Bessho
  • ,
  • Chi Huey Ng
  • ,
  • Kengo Hamada
  • ,
  • Manish Pandey
  • ,
  • Muhammad Akmal Kamarudin
  • ,
  • Daisuke Hirotani
  • ,
  • Takumi Kinoshita
  • ,
  • Takashi Minemoto
  • ,
  • Qing Shen
  • ,
  • Taro Toyoda
  • ,
  • Takurou N. Murakami
  • ,
  • Hiroshi Segawa
  • ,
  • Shuzi Hayase

4
8
開始ページ
1991
終了ページ
1998
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsenergylett.9b01237
出版者・発行元
American Chemical Society ({ACS})

© 2019 American Chemical Society. Tin-lead (Sn-Pb)-based perovskite solar cells (PSCs) still exhibit inferior power conversion efficiency (PCE) compared to their pure Pb counterparts because of high voltage loss (VL) and high photocurrent loss in the infrared region. This study explores that a small amount of cesium ion (Cs+) incorporation in the lattice of Sn-Pb perovskite can reduce the relative lattice strain, which in turn decreases the VL less than 0.50 V. Moreover, surface and bulk trap densities also seem to be reduced by Cs+ addition, as concluded by thermally stimulated current measurements and increased carrier lifetime by photoluminescence study. It was discovered that a small amount of Cs+ lowered the Urbach energy, which can be used as a signature to optimize the optoelectronic and the photovoltaic properties of multication perovskite materials. This study further demonstrates that a high external quantum efficiency (∼80% at 900 nm) can be obtained with fluorine-doped tin oxide (FTO) glass rather than frequently used indium tin oxide (ITO) glass. The strategies employed in the work improved the open-circuit voltage to 0.81 V and gave a photocurrent density of >30 mA/cm2 and a PCE of >20% using a band gap of 1.27 eV.

リンク情報
DOI
https://doi.org/10.1021/acsenergylett.9b01237
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071056082&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85071056082&origin=inward
ID情報
  • DOI : 10.1021/acsenergylett.9b01237
  • eISSN : 2380-8195
  • ORCIDのPut Code : 59821534
  • SCOPUS ID : 85071056082

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