Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process

Yi Yang; Cheng Liu; Arup Mahata; Mo Li; Cristina Roldán-Carmona; Yong Ding; Zulqarnain Arain; Weidong Xu; Yunhao Yang; Pascal Alexander Schouwink; Andreas Züttel; Filippo De Angelis; Songyuan Dai; Mohammad Khaja Nazeeruddin

doi:10.1039/D0EE01833C

Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process†

Yi Yang,‡^ab Cheng Liu,‡^ab Arup Mahata,^cd Mo Li,

^be Cristina Roldán-Carmona,^b Yong Ding,*^ab Zulqarnain Arain,^a Weidong Xu,^a Yunhao Yang,^a Pascal Alexander Schouwink,^b Andreas Züttel,

^be Filippo De Angelis,

^cdfg Songyuan Dai

*^a and Mohammad Khaja Nazeeruddin

*^b

Author affiliations

* Corresponding authors

^a Beijing Key Laboratory of Novel Thin-Film Solar Cells, Beijing Key Laboratory of Energy Safety and Clean Utilization, North China Electric Power University, Beijing 102206, P. R. China
E-mail: dingy@ncepu.edu.cn, sydai@ncepu.edu.cn

^b Institute of Chemical Sciences and Engineering, EPFL Valais, Sion, Switzerland
E-mail: mdkhaja.nazeeruddin@epfl.ch

^c CompuNet, Istituto Italiano di Tecnologia, Via Morego 30, Genova, Italy

^d Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO) Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta” (CNR-SCITEC), Via Elce di Sotto 8, 06123 Perugia, Italy

^e Empa Materials Science and Technology, CH-8600 Dübendorf, Switzerland

^f Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy

^g Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia

Abstract

The emerging 2D perovskites exhibit superior stability and similar optoelectronic attributes compared to the 3D analogues, but their strong exciton-binding energy and inferior interlayer charge-transport reduce dramatically the device performance. Herein, we report a universal approach towards high-efficiency 2D perovskite solar cells (PSCs) by using the synergistic effect of NH₄Cl and H₂O to rotate the crystallographic orientation of 2D systems. The preferential adsorption of NH₄Cl to the (202) crystal plane and the accelerated deprotonation of NH₄⁺ by H₂O guide the crystal growth of the 2D framework towards vertical out-of-plane orientation, which strongly improves the 2D crystallinity, charge mobility, and carrier lifetime. As a representative, (PEA)₂(MA)₃Pb₄I₁₃-based PSCs (n ≤ 4) prepared via the vertical-rotation process achieve a champion power conversion efficiency (PCE) of 17.03%, among the best PCEs reported for 2D PSCs. These findings offer a universal approach to rotate the orientation of 2D perovskites for efficient photovoltaics regardless of the perovskite composition.

Energy & Environmental Science

Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process

Social activity

Search articles by author

Spotlight

Advertisements