J. Mater. Sci. Technol. ›› 2021, Vol. 92: 21-30.DOI: 10.1016/j.jmst.2021.03.034

• Research Article • Previous Articles     Next Articles

Upgraded antisolvent engineering enables 2D@3D quasi core-shell perovskite for achieving stable and 21.6% efficiency solar cells

Fengyou Wanga,b,c, Jinyue Dua, Yuhong Zhanga, Meifang Yanga, Donglai Hand, Lili Yanga,b,c,*(), Lin Fana,b,c, Yingrui Suia,b,c, Yunfei Suna, Jinghai Yanga,b,c,*()   

  1. aKey Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
    bNational Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China
    cKey Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, China
    dSchool of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • Received:2020-12-24 Revised:2021-02-22 Accepted:2021-03-11 Published:2021-11-30 Online:2021-05-08
  • Contact: Lili Yang,Jinghai Yang
  • About author:jhyang1@jlnu.edu.cn (J. Yang).
    * E-mail addresses: llyang1980@126.com (L. Yang),

Abstract:

Perovskite solar cells (PSCs) have become a promising alternative to sustainable energy due to their high power conversion efficiency (PCE) and low-cost processing. However, the practical applications of PSCs are still limited by the trade-off between high performance and poor stability under operation. Here, a 2D@3D perovskite with quasi core-shell architecture linking the superiorities of both two-dimensional (2D) and three-dimensional (3D) perovskite is prepared through a novel upgraded antisolvent approach. The basic properties as well as the phase distribution and the charge transport behavior of the 2D@3D perovskite were systematically elucidated. A high PCE of 21.60% for 2D@3D PSCs is achieved due to the enhanced surface and grain boundaries passivation, improved energy level alignment and efficient holes transport. The 2D@3D perovskite device without encapsulation shows significantly improved stability at the room temperature (90% of initial PCE for 45 d with a relative humidity of 50%±5%) and relative thermal conditions (83% of initial PCE for 200 h under 85 °C). Compared with traditional 3D PSCs, it proved that such 2D@3D perovskite configuration is an effective architecture for enhancing efficiency and improving stability and therefore will facilitate the further industrialization of PSCs.

Key words: Low-cost processing, Surface and grain boundaries, Two-dimensional materials, Efficiency, Stability