Spontaneously Self-Assembly of a 2D/3D Heterostructure Enhances the Efficiency and Stability in Printed Perovskite Solar Cells

Hu J, Wang C, Qiu S, Zhao Y, Gu E, Zeng L, Yang Y, Li C, Liu X, Forberich K, Brabec C, Nazeeruddin MK, Mai Y, Guo F (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Advanced Energy Materials Wiley

DOI: 10.1002/aenm.202000173

Abstract

As perovskite solar cells (PSCs) are highly efficient, demonstration of high-performance printed devices becomes important. 2D/3D heterostructures have recently emerged as an attractive way to relieving the film inhomogeneity and instability in perovskite devices. In this work, a 2D/3D ensemble with 2D perovskites self-assembled atop 3D methylammonium lead triiodide (MAPbI3) via a one-step printing process is shown. A clean and flat interface is observed in the 2D/3D bilayer heterostructure for the first time. The 2D perovskite capping layer significantly suppresses nonradiative charge recombination, resulting in a marked increase in open-circuit voltage (VOC) of the devices by up to 100 mV. An ultrahigh VOC of 1.20 V is achieved for MAPbI3 PSCs, corresponding to 91% of the Shockley–Queisser limit. Moreover, notable enhancement in light, thermal, and moisture stability is obtained as a result of the protective barrier of the 2D perovskites. These results suggest a viable approach for scalable fabrication of highly efficient perovskite solar cells with enhanced environmental stability.

Authors with CRIS profile

Yicheng Zhao Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Ening Gu Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Karen Forberich Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET)

Involved external institutions

Jinan University CN China (CN) Zhengzhou University / 郑州大学 CN China (CN) École Polytechnique Fédérale de Lausanne (EPFL) CH Switzerland (CH)

How to cite

APA:

Hu, J., Wang, C., Qiu, S., Zhao, Y., Gu, E., Zeng, L.,... Guo, F. (2020). Spontaneously Self-Assembly of a 2D/3D Heterostructure Enhances the Efficiency and Stability in Printed Perovskite Solar Cells. Advanced Energy Materials. https://doi.org/10.1002/aenm.202000173

MLA:

Hu, Jinlong, et al. "Spontaneously Self-Assembly of a 2D/3D Heterostructure Enhances the Efficiency and Stability in Printed Perovskite Solar Cells." Advanced Energy Materials (2020).

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