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Single-crystalline TiO2 nanoparticles for stable and efficient perovskite modules

Ding, Yong  
•
Ding, Bin  
•
Kanda, Hiroyuki  
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April 21, 2022
Nature Nanotechnology

The incorporation of electron transport layers based on single-crystalline TiO2 rhombohedral nanoparticles enables the realization of stable and efficient large-area perovskite solar cell modules.

Despite the remarkable progress in power conversion efficiency of perovskite solar cells, going from individual small-size devices into large-area modules while preserving their commercial competitiveness compared with other thin-film solar cells remains a challenge. Major obstacles include reduction of both the resistive losses and intrinsic defects in the electron transport layers and the reliable fabrication of high-quality large-area perovskite films. Here we report a facile solvothermal method to synthesize single-crystalline TiO2 rhombohedral nanoparticles with exposed (001) facets. Owing to their low lattice mismatch and high affinity with the perovskite absorber, their high electron mobility and their lower density of defects, single-crystalline TiO2 nanoparticle-based small-size devices achieve an efficiency of 24.05% and a fill factor of 84.7%. The devices maintain about 90% of their initial performance after continuous operation for 1,400 h. We have fabricated large-area modules and obtained a certified efficiency of 22.72% with an active area of nearly 24 cm(2), which represents the highest-efficiency modules with the lowest loss in efficiency when scaling up.

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Type
research article
DOI
10.1038/s41565-022-01108-1
Web of Science ID

WOS:000784612700004

Author(s)
Ding, Yong  
•
Ding, Bin  
•
Kanda, Hiroyuki  
•
Usiobo, Onovbaramwen Jennifer
•
Gallet, Thibaut
•
Yang, Zhenhai
•
Liu, Yan
•
Huang, Hao
•
Sheng, Jiang
•
Liu, Cheng  
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Date Issued

2022-04-21

Publisher

NATURE PORTFOLIO

Published in
Nature Nanotechnology
Volume

17

Start page

598

End page

605

Subjects

Nanoscience & Nanotechnology

•

Materials Science, Multidisciplinary

•

Science & Technology - Other Topics

•

Materials Science

•

solar-cells

•

recombination

•

interface

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
LCOM  
Available on Infoscience
May 9, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/187796
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