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YAO, K. LI, S. LIU, Z. YING, Y. DVOŘÁK, P. FEI, L. ŠIKOLA, T. HUANG, H. NORDLANDER, P. JEN, A. K. Y. LEI, D.
Original Title
Plasmon-induced trap filling at grain boundaries in perovskite solar cells
Type
journal article in Web of Science
Language
English
Original Abstract
The deep-level traps induced by charged defects at the grain boundaries (GBs) of polycrystalline organic-inorganic halide perovskite (OIHP) films serve as major recombination centres, which limit the device performance. Herein, we incorporate specially designed poly(3-aminothiophenol)-coated gold (Au@PAT) nanoparticles into the perovskite absorber, in order to examine the influence of plasmonic resonance on carrier dynamics in perovskite solar cells. Local changes in the photophysical properties of the OIHP films reveal that plasmon excitation could fill trap sites at the GB region through photo-brightening, whereas transient absorption spectroscopy and density functional theory calculations correlate this photo-brightening of trap states with plasmon-induced interfacial processes. As a result, the device achieved the best efficiency of 22.0% with robust operational stability. Our work provides unambiguous evidence for plasmon-induced trap occupation in OIHP and reveals that plasmonic nanostructures may be one type of efficient additives to overcome the recombination losses in perovskite solar cells and thin-film solar cells in general.
Keywords
electron accumulation; recombination; nanoparticles; performance; spectroscopy; interfaces; resonance; states; films
Authors
YAO, K.; LI, S.; LIU, Z.; YING, Y.; DVOŘÁK, P.; FEI, L.; ŠIKOLA, T.; HUANG, H.; NORDLANDER, P.; JEN, A. K. Y.; LEI, D.
Released
28. 10. 2021
Publisher
SPRINGERNATURE
Location
LONDON
ISBN
2047-7538
Periodical
Light: Science and Applications
Year of study
10
Number
1
State
People's Republic of China
Pages from
219
Pages to
Pages count
12
URL
https://www.nature.com/articles/s41377-021-00662-y
BibTex
@article{BUT173193, author="YAO, K. and LI, S. and LIU, Z. and YING, Y. and DVOŘÁK, P. and FEI, L. and ŠIKOLA, T. and HUANG, H. and NORDLANDER, P. and JEN, A. K. Y. and LEI, D.", title="Plasmon-induced trap filling at grain boundaries in perovskite solar cells", journal="Light: Science and Applications", year="2021", volume="10", number="1", pages="219--219", doi="10.1038/s41377-021-00662-y", issn="2047-7538", url="https://www.nature.com/articles/s41377-021-00662-y" }