A pressure process for efficient and stable perovskite solar cells

Luo J, Xia J, Yang H, Sun C, Li N, Malik HA, Shu H, Wan Z, Zhang H, Brabec C, Jia C (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Nano Energy Elsevier

Book Volume: 77

Article Number: 105063

DOI: 10.1016/j.nanoen.2020.105063

Abstract

The grain boundaries of organic-inorganic halide perovskite films not only function as defect centers, but also behave as intrinsic ion migrating channels and extrinsic moisture-induced degradation initiators, which are detrimental to the efficiency and stability of perovskite solar cells (PSCs). Here, an effective methodology for fabrication of high-quality perovskite layers with reduced non-radiative recombination, suppressed ion migration and increased moisture stability is reported for the first time, referred as the pressure-assisted solution processing (PASP). Through PASP strategy, the nucleation and growth of perovskite crystals can be controlled, leading to the micron-sized grains and microsecond-range carrier lifetimes. The resultant PSC shows champion power conversion efficiency (PCE) as high as 20.74% and a stabilized efficiency exceeding 20%, with superior long-term stability, maintaining above 90% of initial PCE even aging 60 days and continuous 1-sun illumination for 200 h in ambient environment without encapsulation. We unambiguously believe that the control of perovskite crystal nucleation and growth with high quality will be an important direction to improve the efficiency of PSCs to the theoretical limit, as well as to stabilize perovskite-based materials and devices.

Authors with CRIS profile

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

Involved external institutions

Institute of High Energy Physics (IHEP) / 中国科学院高能物理研究所 CN China (CN) University of Electronic Science and Technology of China (UESTC) / 电子科技大学 CN China (CN) Lanzhou University CN China (CN)

How to cite

APA:

Luo, J., Xia, J., Yang, H., Sun, C., Li, N., Malik, H.A.,... Jia, C. (2020). A pressure process for efficient and stable perovskite solar cells. Nano Energy, 77. https://dx.doi.org/10.1016/j.nanoen.2020.105063

MLA:

Luo, Junsheng, et al. "A pressure process for efficient and stable perovskite solar cells." Nano Energy 77 (2020).

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