Controlling Intermediate Phase Formation to Enhance Photovoltaic Performance of Inverted FA-Based Perovskite Solar Cells

Li C, Park H, Qiu S, Streller F, Zhang K, Peng Z, Byun J, Tian J, Maiti S, Xie Z, Dong L, Liu C, Le Corre VM, Shang Y, Wu J, Zhang J, Feng M, Späth A, Forberich K, Osvet A, Heumüller T, Christiansen SH, Halik M, Fink R, Unruh T, Li N, Lüer L, Brabec C (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 9

Pages Range: 5434-5443

Journal Issue: 11

DOI: 10.1021/acsenergylett.4c02580

Abstract

Formamidinium (FA)-based perovskites exhibit significant potential for highly efficient photovoltaics due to their promising optoelectronic properties and optimal bandgap. However, the undesired inactive phase arises from multiple crystal nucleation pathways formed by various intermediate phases during the film formation process, persistently accompanying it. FA-based perovskites frequently struggle to form uniform, highly crystalline films. This challenge complicates the development of reliable and highly reproducible crystallization processes for perovskites and the establishment of guidelines for controlling the α-phase formation. In this work, we investigate the role of poly(acrylonitril-co-methyl acrylate) (PAM) to simultaneously control nucleation and subsequent α-phase crystallization. This successfully demonstrates the regulation of oriented crystal growth through the creation of a PAM-PbI2 intermediate. Ultimately, PAM-modified p-i-n architecture devices obtain a promising power conversion efficiency (PCE) of 25.30%, with VOC (1.211 V), achieving 95% of the detailed balance limit. Additionally, PAM-modified devices maintain ≥90% of the initial efficiency for 1000 h under 1 sun and 65 °C operation.

Authors with CRIS profile

Additional Organisation(s)

Involved external institutions

Fraunhofer-Institut für Keramische Technologien und Systeme (IKTS) Germany (DE) South China University of Technology (SCUT) / 华南理工大学 China (CN)

How to cite

APA:

Li, C., Park, H., Qiu, S., Streller, F., Zhang, K., Peng, Z.,... Brabec, C. (2024). Controlling Intermediate Phase Formation to Enhance Photovoltaic Performance of Inverted FA-Based Perovskite Solar Cells. ACS Energy Letters, 9(11), 5434-5443. https://doi.org/10.1021/acsenergylett.4c02580

MLA:

Li, Chaohui, et al. "Controlling Intermediate Phase Formation to Enhance Photovoltaic Performance of Inverted FA-Based Perovskite Solar Cells." ACS Energy Letters 9.11 (2024): 5434-5443.

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