Joon Hak Oh Research Group at Seoul National University

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Congrats! Our paper accepted in Nature Communications ! 관리자 │ 2020-09-11 HIT 1569
Our paper regarding enhancement of 2D growth of organic semiconductors via a small-molecule heterointerface has been accepted in Nature Communications ! (IF : 10.742 (2013)) B. Kang,† M. Jang,† Y. Chung,† H. Kim, S. K. Kwak, J. H. Oh,* K, Cho,* "Enhancing 2D growth of organic semiconductor thin films with macroporous structures via a small-molecule heterointerface", Nature Commun. 2014, 5:4752 [†contributed equally] * details about this paper : http://ohgroup.postech.ac.kr/bbs/board.php?bo_table=br_21&wr_id=81 This research will have a significant impact in the fields of organic electronics. One of the most popular approaches to improve the performance of organic electronic devices has been to reduce the grain boundaries by surface modifications. Despite intense research efforts, however, the average grain size of well-fabricated organic semiconductor thin films remains on the order of a few micrometres, which limits their performance and applications. We introduce a novel concept that utilizes an organic heterointerface to make single-crystal-like organic semiconductor thin films with far fewer grain boundaries. For the first time, the organic heterointerface is used to control the morphology of organic semiconducting layers with outstanding device performance. Our result contradicts a common belief that rubber-like soft substrates (usually polymers) disturb and degrade the growth of organic semiconductor thin films. We newly found that rubbery small molecules with well-balanced interaction energy to the active organic layer can enhance the diffusion of deposited admolecules and improve the crystallinity. Molecular dynamics simulations as well as systematic studies on the film structure were performed to corroborate our new findings. Having demonstrated this improvement in the crystallinity of organic thin film, we then introduce a novel method for constructing nanostructures with organic semiconducting materials as building blocks. Favorable interactions between the two molecules and the substrate are shown to result in a self-assembly of macroporous structure on the scale of hundreds of nanometres. This approach is remarkably simple, effective, versatile and generally applicable to the fabrication of nanostructured thin films. In summary, our approach demonstrates a conceptually novel methodology for the fabrication of “structurally engineered” “single-crystal-like” organic semiconducting thin films towards high-performance flexible organic electronics.

Congrats! Our paper accepted in Nature Communications !

관리자 │ 2020-09-11

HIT

1569

Our paper regarding enhancement of 2D growth of organic semiconductors via a small-molecule heterointerface has been accepted in Nature Communications ! (IF : 10.742 (2013))

B. Kang,† M. Jang,† Y. Chung,† H. Kim, S. K. Kwak, J. H. Oh,* K, Cho,* "Enhancing 2D growth of organic semiconductor thin films with macroporous structures via a small-molecule heterointerface", Nature Commun. 2014, 5:4752 [†contributed equally]

* details about this paper : http://ohgroup.postech.ac.kr/bbs/board.php?bo_table=br_21&wr_id=81

This research will have a significant impact in the fields of organic electronics. One of the most popular approaches to improve the performance of organic electronic devices has been to reduce the grain boundaries by surface modifications. Despite intense research efforts, however, the average grain size of well-fabricated organic semiconductor thin films remains on the order of a few micrometres, which limits their performance and applications. We introduce a novel concept that utilizes an organic heterointerface to make single-crystal-like organic semiconductor thin films with far fewer grain boundaries. For the first time, the organic heterointerface is used to control the morphology of organic semiconducting layers with outstanding device performance.

Our result contradicts a common belief that rubber-like soft substrates (usually polymers) disturb and degrade the growth of organic semiconductor thin films. We newly found that rubbery small molecules with well-balanced interaction energy to the active organic layer can enhance the diffusion of deposited admolecules and improve the crystallinity. Molecular dynamics simulations as well as systematic studies on the film structure were performed to corroborate our new findings.

Having demonstrated this improvement in the crystallinity of organic thin film, we then introduce a novel method for constructing nanostructures with organic semiconducting materials as building blocks. Favorable interactions between the two molecules and the substrate are shown to result in a self-assembly of macroporous structure on the scale of hundreds of nanometres. This approach is remarkably simple, effective, versatile and generally applicable to the fabrication of nanostructured thin films.

In summary, our approach demonstrates a conceptually novel methodology for the fabrication of “structurally engineered” “single-crystal-like” organic semiconducting thin films towards high-performance flexible organic electronics.

이전글	Our paper accepted in Chemistry of Materials
다음글	[언론보도] 전하 이동도 4배 높인 유기박막트랜지스터 개발

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