A bilayer conducting polymer structure for planar perovskite solar cells with over 1,400 hours operational stability at elevated temperatures

Zhao Y, Heumueller T, Zhang J, Luo J, Kasian O, Langner S, Kupfer C, Liu B, Zhong Y, Elia J, Osvet A, Wu J, Liu C, Wan Z, Jia C, Li N, Hauch J, Brabec C (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Nature Energy Nature Publishing Group

DOI: 10.1038/s41560-021-00953-z

Abstract

The long-term stability of perovskite solar cells remains a challenge. Both the perovskite layer and the device architecture need to endure long-term operation. Here we first use a self-constructed high-throughput screening platform to find perovskite compositions stable under heat and light. Then, we use the most stable perovskite composition to investigate the stability of contact layers in solar cells. We report on the thermal degradation mechanism of transition metal oxide contact (for example, Ta-WOx/NiOx) and propose a bilayer structure consisting of acid-doped polymer stacked on dopant-free polymer as an alternative. The dopant-free polymer provides an acid barrier between the perovskite and the acid-doped polymer. The bilayer structure exhibits stable ohmic contact at elevated temperatures and buffers iodine vapours. The unencapsulated device based on the bilayer contact (with a MgF2 capping layer) retains 99% of its peak efficiency after 1,450 h of continuous operation at 65 degrees C in a N-2 atmosphere under metal-halide lamps. The device also shows negligible hysteresis during the entire ageing period.

Authors with CRIS profile

Junsheng Luo Institute Materials for Electronics and Energy Technology (i-MEET) Olga Kasian Professur für Materialien für die elektrochemische Energiekonversion Stefan Langner Institute Materials for Electronics and Energy Technology (i-MEET) Christian Kupfer Institute Materials for Electronics and Energy Technology (i-MEET) Bowen Liu Institute Materials for Electronics and Energy Technology (i-MEET) Yu Zhong Institute Materials for Electronics and Energy Technology (i-MEET) Jack Elia Institute Materials for Electronics and Energy Technology (i-MEET) Andres Osvet Institute Materials for Electronics and Energy Technology (i-MEET) Chao Liu Institute Materials for Electronics and Energy Technology (i-MEET) Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) Jens Hauch
Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation(s)

Graduiertenkolleg 2495 Energiekonvertierungssysteme: von Materialien zu Bauteilen (Energy Conversion Systems: From Materials to Devices)

Involved external institutions

Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien (HI-ERN) DE Germany (DE) University of Electronic Science and Technology of China (UESTC) / 电子科技大学 CN China (CN)

How to cite

APA:

Zhao, Y., Heumueller, T., Zhang, J., Luo, J., Kasian, O., Langner, S.,... Brabec, C. (2021). A bilayer conducting polymer structure for planar perovskite solar cells with over 1,400 hours operational stability at elevated temperatures. Nature Energy. https://doi.org/10.1038/s41560-021-00953-z

MLA:

Zhao, Yicheng, et al. "A bilayer conducting polymer structure for planar perovskite solar cells with over 1,400 hours operational stability at elevated temperatures." Nature Energy (2021).

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