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Conductive colloidal perovskite quantum dot inks towards fast printing of solar cells

Xuliang Zhang, Hehe Huang, Chenyu Zhao, Lujie Jin, Chihyung Lee, Youyong Li, Doo-Hyun Ko, Wanli Ma (), Tom Wu and Jianyu Yuan ()
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Xuliang Zhang: Soochow University
Hehe Huang: Soochow University
Chenyu Zhao: Soochow University
Lujie Jin: Soochow University
Chihyung Lee: Sungkyunkwan University
Youyong Li: Soochow University
Doo-Hyun Ko: Sungkyunkwan University
Wanli Ma: Soochow University
Tom Wu: The Hong Kong Polytechnic University
Jianyu Yuan: Soochow University

Nature Energy, 2024, vol. 9, issue 11, 1378-1387

Abstract: Abstract Quantum dot (QD) provides a versatile platform for high-throughput processing of semiconductors for large-area optoelectronic applications. Unfortunately, the QD solar cell is hampered by the time-consuming layer-by-layer process, a major challenge in manufacturing printable devices. Here we demonstrate a sequential acylation-coordination protocol including amine-assisted ligand removal and Lewis base-coordinated surface restoration to synthesize conductive APbI3 (A = formamidinium (FA), Cs or methylammonium) colloidal perovskite QD (PeQD) inks that enable one-step PeQD film deposition without additional solid-state ligand exchange. The resultant PeQD film displays uniform morphology with elevated electronic coupling, more ordered structure and homogeneous energy landscape. Narrow-bandgap FAPbI3 PeQD-based solar cells achieve a champion efficiency of 16.61% (certified 16.20%), exceeding the values obtained with other QD inks and layer-by-layer processes. The conductive PeQD inks are compatible with large-area device (9 × 9 cm2) fabrication using the blade-coating technique with a speed up to 50 mm s−1.

Date: 2024
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DOI: 10.1038/s41560-024-01608-5

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