Overcoming photovoltage deficitvianatural amino acid passivation for efficient perovskite solar cells and modules

Hu J, Xu X, Chen Y, Wu S, Wang Z, Wang Y, Jiang X, Cai B, Shi T, Brabec C, Mai Y, Guo F (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Book Volume: 9

Pages Range: 5857-5865

Journal Issue: 9

DOI: 10.1039/d0ta12342k

Abstract

Electronic defects at grain boundaries and surfaces of perovskite crystals impair the photovoltaic performance and stability of solar devices. In this work, we report the compensation of photovoltage losses in blade-coated methylammonium lead triiodide (MAPbI3) devicesviapassivation with natural amino acid (NAA) molecules. We found that the optoelectronic properties of NAA-passivated perovskite films and the corresponding device performances are closely correlated with the molecular interaction strength. A side-by-side comparative study of four typical NAAs reveals that arginine (Arg) functionalized with a guanidine end group exhibits optimum passivation effects owing to the strongest coordinative bonding with the uncoordinated Pb2+, which markedly suppresses the detrimental antisite PbIdeep level defects. As a result, nonradiative charge recombination is significantly reduced, resulting in a substantially increased open-circuit voltage (VOC) of 1.17 V and a high efficiency of 20.49%. A solar module with an active area of 10.08 cm2is also fabricated, yielding an efficiency of 15.65% with negligibleVOClosses. In parallel, the Arg-passivated solar devices exhibit enhanced operational stability due to the formation of a hydrophilic Arg protective layer which encapsulates the perovskite crystals.

Authors with CRIS profile

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

Involved external institutions

Jinan University CN China (CN) South China Normal University / 华南师范大学 CN China (CN) University of Shanghai for Science and Technology (USST) CN China (CN)

How to cite

APA:

Hu, J., Xu, X., Chen, Y., Wu, S., Wang, Z., Wang, Y.,... Guo, F. (2021). Overcoming photovoltage deficitvianatural amino acid passivation for efficient perovskite solar cells and modules. Journal of Materials Chemistry A, 9(9), 5857-5865. https://doi.org/10.1039/d0ta12342k

MLA:

Hu, Jinlong, et al. "Overcoming photovoltage deficitvianatural amino acid passivation for efficient perovskite solar cells and modules." Journal of Materials Chemistry A 9.9 (2021): 5857-5865.

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