2D-3D heterostructure enables scalable coating of efficient low-bandgap Sn–Pb mixed perovskite solar cells

Zeng L, Chen Z, Qiu S, Hu J, Li C, Liu X, Liang G, Brabec C, Mai Y, Guo F (2019)

Publication Language: English

Publication Type: Journal article

Publication year: 2019

Journal

Nano Energy Elsevier

Book Volume: 66

Article Number: 104099

DOI: 10.1016/j.nanoen.2019.104099

Abstract

Low-bandgap photovoltaic absorbers based on mixed tin-lead (Sn–Pb) halide perovskites offer promising opportunities to fabricate efficient multi-junction solar cells. However, the current Sn–Pb mixed perovskite solar cells (PSCs) were mainly prepared using lab-scale spin-coating, greatly hindering their application for large-area device fabrication. Here, we report a simple and robust methodology for scalable deposition of dense and uniform Sn–Pb mixed perovskite films by one-step blade coating. High quality perovskite films with different Sn–Pb ratios are readily prepared by vacuuming the freshly coated precursor films followed by an anneal process. Solar cells based on these bladed Sn–Pb mixed perovskite absorbers showed decent photovoltaic behaviors. Further enhancement of device performance was realized via surface defects passivation using phenethylammonium bromide (PEABr). It was found that the formation of a thin layer of 2D Ruddlesden-Popper perovskite on top of 3D bulk perovskite significantly suppressed charge recombination. As a consequence, the open-circuit voltage (VOC) of the solar cells (Eg = 1.35 eV) was dramatically lifted from 0.71 V to 0.78 V, yielding high efficiencies of over 15%. Moreover, notable improvement in shelf and moisture stability was observed due to the protection barrier of the 2D perovskite capping layer.

Authors with CRIS profile

Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Jinan University CN China (CN) Zhengzhou University / 郑州大学 CN China (CN) Shenzhen University (SZU) / 深圳大学 CN China (CN)

How to cite

APA:

Zeng, L., Chen, Z., Qiu, S., Hu, J., Li, C., Liu, X.,... Guo, F. (2019). 2D-3D heterostructure enables scalable coating of efficient low-bandgap Sn–Pb mixed perovskite solar cells. Nano Energy, 66. https://dx.doi.org/10.1016/j.nanoen.2019.104099

MLA:

Zeng, Linxiang, et al. "2D-3D heterostructure enables scalable coating of efficient low-bandgap Sn–Pb mixed perovskite solar cells." Nano Energy 66 (2019).

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