Highly Dispersed Ligand-Free SnO2 for Inverted Perovskite Solar Cells

Ligand-free SnO 2 nanoparticles were synthesized via a non-hydrolytic route using benzyl alcohol, resulting in well-crystallized SnO 2 with a size below 20 nm. The dispersibility of these SnO 2 nanoparticles was optimized using Hansen solubility parameters, achieving stable dispersion in a mixed sol...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2024, 41(14), 299, pp.3799-3804
Main Authors: Kim, Hee Jung, Yoon, Geon Woo, Jo, Bonghyun, Jung, Hyun Suk
Format: Article
Language:English
Subjects:
Benzyl alcohol
Biotechnology
Catalysis
Charge transfer
Chemistry
Chemistry and Materials Science
Chlorobenzene
Crystal defects
Crystallization
Electron transport
Energy conversion efficiency
Industrial Chemistry/Chemical Engineering
Ligands
Materials Science
Nanoparticles
Open circuit voltage
Original Article
Perovskites
Photovoltaic cells
Solar cells
Solubility parameters
Spin coating
Surface defects
Thin films
Tin dioxide
Zinc oxide
화학공학
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Summary:Ligand-free SnO 2 nanoparticles were synthesized via a non-hydrolytic route using benzyl alcohol, resulting in well-crystallized SnO 2 with a size below 20 nm. The dispersibility of these SnO 2 nanoparticles was optimized using Hansen solubility parameters, achieving stable dispersion in a mixed solvent composed of isopropanol and chlorobenzene in a 2:8 volume ratio. The SnO 2 layer was deposited on the perovskite layer via spin-coating, forming a uniform and compact layer with efficient charge transfer properties. Photovoltaic performance analysis revealed that p-i-n perovskite solar cells with SnO 2 electron transport layer achieved a power conversion efficiency of 13.4%, compared to 15.8% for perovskite solar cells with PCBM/ZnO electron transport layer. The lower power conversion efficiency with SnO 2 electron transport layer is attributed to decreased open-circuit voltage ( V oc ) due to surface defects. Despite this, the direct deposition of ligand-free SnO 2 thin film using a solution process is significant, and ongoing research aims to further enhance performance.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-024-00289-w