Aligned and Graded Type-II Ruddlesden-Popper Perovskite Films for Efficient Solar Cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Xiao-Ke Liu
  • Mingjie Li
  • Feng Liu
  • Zhongcheng Yuan
  • Elizaveta Tiukalova
  • Zhibo Yan
  • Martial Duchamp
  • Shi Chen
  • Yuming Wang
  • Sai Bai
  • Jun-Ming Liu
  • Henry J. Snaith
  • Tze Chien Sum
  • Feng Gao

Detail(s)

Original languageEnglish
Article number1800185
Journal / PublicationAdvanced Energy Materials
Volume8
Issue number21
Early online date8 May 2018
Publication statusPublished - 25 Jul 2018

Abstract

Recently, Ruddlesden-Popper perovskites (RPPs) have attracted increasing interests due to their promising stability. However, the efficiency of solar cells based on RPPs is much lower than that based on 3D perovskites, mainly attributed to their poor charge transport. Herein, a simple yet universal method for controlling the quality of RPP films by a synergistic effect of two additives in the precursor solution is presented. RPP films achieved by this method show (a) high quality with uniform morphology, enhanced crystallinity, and reduced density of sub-bandgap states, (b) vertically oriented perovskite frameworks that facilitate efficient charge transport, and (c) type-II band alignment that favors self-driven charge separation. Consequently, a hysteresis-free RPP solar cell with a power conversion efficiency exceeding 12%, which is much higher than that of the control device (1.5%), is achieved. The findings will spur new developments in the fabrication of high-quality, aligned, and graded RPP films essential for realizing efficient and stable perovskite solar cells.

Research Area(s)

  • 2D, Additives, Charge separation, Layered perovskite, Solar cells

Citation Format(s)

Aligned and Graded Type-II Ruddlesden-Popper Perovskite Films for Efficient Solar Cells. / Qing, Jian; Liu, Xiao-Ke; Li, Mingjie; Liu, Feng; Yuan, Zhongcheng; Tiukalova, Elizaveta; Yan, Zhibo; Duchamp, Martial; Chen, Shi; Wang, Yuming; Bai, Sai; Liu, Jun-Ming; Snaith, Henry J.; Lee, Chun-Sing; Sum, Tze Chien; Gao, Feng.

In: Advanced Energy Materials, Vol. 8, No. 21, 1800185, 25.07.2018.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review