id:"swepub:oai:DiVA.org:uu-354964"
Search: id:"swepub:oai:DiVA.org:uu-354964" > Molecularly Resolve...
- 1 of 1
- Previous record
- Next record
- To hitlist
Molecularly Resolved Electronic Landscapes of Differing-Acceptor-Donor Interface Geometries
-
- Cochrane, Katherine A. (author)
- Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada;Univ British Columbia, Stewart Blusson Quantum Matter Inst, Vancouver, BC V6T 1Z4, Canada
-
- Roussy, Tanya S. (author)
- Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
-
- Yuan, Bingkai (author)
- Univ British Columbia, Stewart Blusson Quantum Matter Inst, Vancouver, BC V6T 1Z4, Canada
- show more...
- show less...
- (creator_code:org_t)
- 2018-03-30
- 2018
- English.
- In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 122:15, s. 8437-8444
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Organic semiconductors are a promising class of materials for numerous electronic and optoelectronic applications, including solar cells. However, these materials tend to be extremely sensitive to the local environment and surrounding molecular geometry, causing the energy levels near boundaries and interfaces essential to device function to differ from those of the bulk. Scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STM/STS) have the ability to examine both the structural and electronic properties of these interfaces on the molecular and submolecular scales. Here, we investigate the prototypical acceptor donor system, 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA)/copper(II) phthalocyanine (CuPc) using submolecularly resolved pixel-by-pixel STS to demonstrate the importance of subtle changes in interface geometry of prototypical solar cell materials. PTCDA and CuPc were sequentially deposited on NaCl bilayers to create lateral heterojunctions that were decoupled from the underlying substrate. Donor and acceptor states were observed to shift in opposite directions, suggesting an equilibrium charge transfer between the two. Narrowing of the gap energy compared to isolated molecules on the same surface is indicative of the influence of the local dielectric environment. Further, we find that the electronic state energies of both acceptor and donor are strongly dependent on the ratio and positioning of both molecules in larger clusters. This molecular-scale structural dependence of the electronic states of both interfacial acceptor and donor has significant implications for device design, where level alignment strongly correlates to device performance.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- The Journal of Physical Chemistry C (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Cochrane, Kather ...
- Roussy, Tanya S.
- Yuan, Bingkai
- Tom, Gary
- Marsell, Erik
- Burke, Sarah A.
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Chemical Science ...
- and Physical Chemist ...
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Condensed Matter ...
- Articles in the publication
- The Journal of P ...
- By the university
- Uppsala University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
