RbPbI 3 Seed Embedding in PbI 2 Substrate Tailors the Facet Orientation and Crystallization Kinetics of Perovskites.

Authors :: Yu G
Huang Y
Khan D
Sui Y
Wang S
Yang X
Zhou W
Chang K
Tang J
Chen W
Han P
Tang Z
Source :: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Mar; Vol. 20 (11), pp. e2307219. Date of Electronic Publication: 2023 Oct 26.
Publication Year :: 2024
Abstract: High power conversion efficiencies (PCEs) in perovskite solar cells (PSCs) have always been awe-inspiring, but perovskite films scalability is an exacting precondition for PSCs commercial deployment, generally unachievable through the antisolvent technique. On the contrary, in the two-step sequential method, the perovskite's uncontrolled crystallization and unnecessary PbI <subscript>2</subscript> residue impede the device's performance. These two issues motivated to empower the PbI <subscript>2</subscript> substrate with orthorhombic RbPbI <subscript>3</subscript> crystal seeds, which act as grown nuclei and develop orientated perovskites lattice stacks, improving the perovskite films morphologically and reducing the PbI <subscript>2</subscript> content in eventual perovskite films. Thence, achieving a PCE of 24.17% with suppressed voltage losses and an impressive life span of 1140 h in the open air.<br /> (© 2023 Wiley-VCH GmbH.)

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