Enhanced Light Outcoupling in Organic Light-Emitting Diodes Using Phase Separated Polymer Films

Hong, Juhee; Han, Joo Won; Tu, Trang T.K.; Kim, Soyeon; Lim, Dong-Chan; Park, Sung Bin; Kim, Souk Yoon; Kim, Jung Ha; Kim, Dong Woo; Lee, Jonghee; Lim, Kwon Taek; Kim, Yong Hyun

doi:10.1007/s13391-020-00224-1

Cited by 6 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Molecular self-assembly on surfaces is a spontaneous organization of building blocks of organic molecules into ordered structures, which is considered as a viable method for realizing functional supramolecular architectures and has potential applications in molecular electronic devices, − organic light-emitting diodes (OLEDs), , catalysis, − organic solar cells, − and so forth. On-surface molecular self-assembly to form desired nanostructures is determined both by the intrinsic properties of the molecules that govern the intramolecular interaction and their surface environment that affects the molecule–substrate interaction. − Usually, the surface of substrates is not perfect; for example, there are surface steps, kinks, and vacancies.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of N,N′-Di(n-butyl)-1,3,8,10-tetramethylquinacridone Governed by Metallic Surface Features of a Ag(110) Substrate

Yang

Zhu

et al. 2021

J. Phys. Chem. C

View full text Add to dashboard Cite

We present scanning tunneling microscopy (STM) measurements combined with density functional theory (DFT) calculations to study the relationship between self-assembly characteristics and interaction motifs for organic molecules [here, N,N′-di(n-butyl)-1,3,8,10-tetramethylquinacridone (TMDBQA)] on a Ag(110) surface, which exhibits a distinctive surface, featuring regions, such as atomically flat terraces and steps. It was found that Ag atoms on the surface terraces are weaker in chemical reactivity than those on the step edges, which leads to the different molecule–substrate interactions and thereby, the different self-assembly structures. The carbonyl oxygen on TMDBQA forms strong coordinative bonds with Ag atoms at the step edge, which is responsible for the formation of adsorbate-induced facets, and directs the arrangement of the molecules with respect to the steps. The DFT calculations demonstrate that with the facet formation, the adsorption energy between the molecule and substrate increases and the intermolecular binding energy decreases. By comparing the hydrogen-bonded self-assembled monolayer of N,N′-di(n-butyl)quinacridone on the Ag(110) surface, we concluded that the formation of adsorbate-induced facets is not favored when molecules bind to each other by strong and directional intermolecular interactions.

show abstract