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Interfacial rearrangements and strain evolution in the thin film growth of ZnPc on glass

Abstract:
We report on the characterization of the growth of vacuum-deposited zinc phthalocyanine (ZnPc) thin films on glass through a combination of in situ grazing incidence x-ray scattering, x-ray reflectivity, and atomic force microscopy. We found that the growth at room temperature proceeds via the formation of two structurally unique substrate-induced interfacial layers, followed by the growth of the γ -ZnPc polymorph thereafter (thickness ≈ 1.0 nm). As the growth of the bulk γ -ZnPc progresses, a substantial out-of-plane lattice strain ( ≈ 15 % relative to γ -ZnPc powder) is continually relaxed during the thin film growth. The rate of strain relaxation was slowed after a thickness of ≈ 13 nm, corresponding to the transition from layer growth to island growth. The findings reveal the real-time microstructural evolution of ZnPc and highlight the importance of substrate-induced strain on thin film growth.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/physrevmaterials.6.033401

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Role:
Author
ORCID:
0000-0001-7875-2278
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Role:
Author
ORCID:
0000-0002-1726-7110
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Role:
Author
ORCID:
0000-0003-3887-3395
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Role:
Author
ORCID:
0000-0001-6031-2450


Publisher:
American Physical Society
Journal:
Physical Review Materials More from this journal
Volume:
6
Issue:
3
Article number:
033401
Publication date:
2022-03-08
Acceptance date:
2022-02-15
DOI:
EISSN:
2475-9953


Language:
English
Keywords:
Pubs id:
1248906
Local pid:
pubs:1248906
Deposit date:
2022-03-30

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