Lamination of >21% Efficient Perovskite Solar Cells with Independent Process Control of Transport Layers and Interfaces

Journal Article · Fri Mar 22 00:00:00 EDT 2024 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.3c16765· OSTI ID:2345162

Yadavalli, Srinivas K. ^[1]; Lanaghan, Clare L. ^[2]; Palmer, Jack ^[3]; Gayle, Andrew J. ^[2]; Penley, Daniel ^[2]; Okia, Oluka ^[2]; Zaccherini, Maria ^[2]; Trejo, Orlando ^[2]; Dunfield, Sean P. ^[3]; Fenning, David P. ^[3]; Dasgupta, Neil P. ^[2]

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1. Univ. of Michigan, Ann Arbor, MI (United States); Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Univ. of Michigan, Ann Arbor, MI (United States)
3. Univ. of California, San Diego, CA (United States)

Transport layer and interface optimization is critical for improving the performance and stability of perovskite solar cells (PSCs) but is restricted by the conventional fabrication approach of sequential layer deposition. While the bottom transport layer is processed with minimum constraints, the narrow thermal and chemical stability window of the halide perovskite (HP) layer severely restricts the choice of top transport layer and its processing conditions. To overcome these limitations, we demonstrate lamination of HPs—where two transport layer-perovskite half-stacks are independently processed and diffusion-bonded at the HP-HP interface—as an alternative fabrication strategy that enables self-encapsulated solar cells. Power conversion efficiencies (PCE) of >21% are realized using cells that incorporate a novel transport layer combination along with dual-interface passivation via self-assembled monolayers, both of which are uniquely enabled by the lamination approach. This is the highest reported PCE for any laminated PSC encapsulated between glass substrates. We further show that this approach expands the processing window beyond traditional fabrication processes and is adaptable for different transport layer compositions. The laminated PSCs retained >75% of their initial PCE after 1000 h of 1-sun illumination at 40 °C in air using an all-inorganic transport layer configuration without additional encapsulation. Furthermore, a laminated 1 cm² device maintained a V_oc of 1.16 V. Finally, the scalable lamination strategy in this study enables the implementation of new transport layers and interfacial engineering approaches for improving performance and stability.

• Research Organization: Univ. of California, San Diego, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
• Grant/Contract Number: EE0009521
• OSTI ID: 2345162
• Journal Information: ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 13 Vol. 16; ISSN 1944-8244
• Publisher: American Chemical Society (ACS)
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
interface engineering
lamination
manufacturing
perovskite solar cells
self-assembled monolayers