High colloidal stability ZnO nanoparticles independent on solvent polarity and their application in polymer solar cells.

Abstract:

:Significant aggregation between ZnO nanoparticles (ZnO NPs) dispersed in polar and nonpolar solvents hinders the formation of high quality thin film for the device application and impedes their excellent electron transporting ability. Herein a bifunctional coordination complex, titanium diisopropoxide bis(acetylacetonate) (Ti(acac)2) is employed as efficient stabilizer to improve colloidal stability of ZnO NPs. Acetylacetonate functionalized ZnO exhibited long-term stability and maintained its superior optical and electrical properties for months aging under ambient atmospheric condition. The functionalized ZnO NPs were then incorporated into polymer solar cells with conventional structure as n-type buffer layer. The devices exhibited nearly identical power conversion efficiency regardless of the use of fresh and old (2 months aged) NPs. Our approach provides a simple and efficient route to boost colloidal stability of ZnO NPs in both polar and nonpolar solvents, which could enable structure-independent intense studies for efficient organic and hybrid optoelectronic devices.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Lee W,Yeop J,Heo J,Yoon YJ,Park SY,Jeong J,Shin YS,Kim JW,An NG,Kim DS,Park J,Kim JY

doi

10.1038/s41598-020-75070-0

subject

Has Abstract

pub_date

2020-10-22 00:00:00

pages

18055

issue

1

issn

2045-2322

pii

10.1038/s41598-020-75070-0

journal_volume

10

pub_type

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