• Home
  • Growing Ultra-flat Organic Films on Graphene with a Face-on Stacking via Moderate Molecule-Substrate Interaction

Growing Ultra-flat Organic Films on Graphene with a Face-on Stacking via Moderate Molecule-Substrate Interaction

The electronic properties of small molecule organic crystals depend heavily on the molecular orientation. For multi-layer organic photovoltaics, it is desirable for the molecules to have a face-on orientation in order to enhance the out-of-plane transport properties. However, it is challenging to grow well-ordered and smooth films with a face-on stacking on conventional substrates such as metals and oxides. In this work, metal-phthalocyanine molecules is used as a model system to demonstrate that two-dimensional crystals such as graphene can serve as a template for growing high quality, ultra-flat organic films with a face-on orientation. Furthermore, the molecule-substrate interaction is varied systematically from strong to weak interaction regime with the interaction strength characterized by ultrafast electron transfer measurements. We find that in order to achieve the optimum orientation and morphology, the molecule-substrate interaction needs to be strong enough to ensure a face-on stacking while it needs to be weak enough to avoid film roughening.

Nature Scientific Reports, Vol. 6, 28895, 2016

File: 
Authors: 
Wang*, Ti; Kafle*, Tika R.; Kattel*, Bhupal; Liu*, Qingfeng; Wu*, Judy; Chan*, Wai-Lun * KU Authors

Department Communications

Colloquia         Seminars         Public Events         AAL

MARAC2017

NEWSLETTERS

Department            Alumni

VIDEOS

Mr. Bob Show              Colloquia

Alumni Remembrances          Public Lectures

Departmental Calendar

Paper of the Week

A. Al-bataineh, P. Baringer, A. Bean, S. Boren, J. Bowen, C. Bruner, J. Castle, L. Forthomme, R.P. Kenny III, A. Kropivnitskaya, D. Majumder, W. Mcbrayer, M. Murray, S. Sanders, R. Stringer, J.D. Tapia Takaki, Q. Wang and the CMS Collaboration

See previous papers

Mr. Bob T-Shirts: Lab Support
Home to 50+ departments, centers, and programs, the School of the Arts, and the School of Public Affairs and Administration
KU offers courses in 40 languages
No. 1 ranking in city management and urban policy —U.S. News and World Report
One of 34 U.S. public institutions in the prestigious Association of American Universities
Nearly $290 million in financial aid annually
KU Today
RT @LJWorld : The other national championship: @KansasDebate hosting National Debate Tournament this weekend at @KUEdwardsCampus https://t.c…


Social Media

Find us on Facebook