Energy Level Bending in Ultrathin Polymer Layers Obtained through Langmuir-Shafer Deposition

Bao, QinyeLinköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten (author)

Funding Agencies|EU project SUNFLOWER of FP7 cooperation programme [287594]; Swedish Research Council [2013-4022]; Goran Gustafsson Foundation for Research in Natural Sciences and Medicine; Swedish Research Council Linnaeus grant LiLi-NFM; Advanced Functional Materials Center at Linkoping University
The semiconductor-electrode interface impacts the function and the performance of (opto) electronic devices. For printed organic electronics the electrode surface is not atomically clean leading to weakly interacting interfaces. As a result, solution-processed organic ultrathin films on electrodes typically form islands due to dewetting. It has therefore been utterly difficult to achieve homogenous ultrathin conjugated polymer films. This has made the investigation of the correct energetics of the conjugated polymer-electrode interface impossible. Also, this has hampered the development of devices including ultrathin conjugated polymer layers. Here, LangmuirShafer-manufactured homogenous mono-and multilayers of semiconducting polymers on metal electrodes are reported and the energy level bending using photoelectron spectroscopy is tracked. The amorphous films display an abrupt energy level bending that does not extend beyond the first monolayer. These findings provide new insights of the energetics of the polymer-electrode interface and opens up for new high-performing devices based on ultrathin semiconducting polymers.

Fabiano, SimoneLinköpings universitet,Fysik och elektroteknik,Tekniska fakulteten(Swepub:liu)simfa84 (author)
Andersson, MattiasLinköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska högskolan(Swepub:liu)matan68 (author)
Braun, SlawomirLinköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten(Swepub:liu)slama19 (author)
Sun, ZhengyiLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)zhesu73 (author)
Crispin, XavierLinköpings universitet,Fysik och elektroteknik,Tekniska fakulteten(Swepub:liu)xavcr43 (author)
Berggren, MagnusLinköpings universitet,Fysik och elektroteknik,Tekniska fakulteten(Swepub:liu)magbe98 (author)
Liu, XianjieLinköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten(Swepub:liu)xiali21 (author)
Fahlman, MatsLinköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten(Swepub:liu)matfa21 (author)
Linköpings universitetYtors Fysik och Kemi (creator_code:org_t)

In:Advanced Functional Materials: WILEY-V C H VERLAG GMBH26:7, s. 1077-10841616-301X1616-3028

By the author/editor: Bao, Qinye; Fabiano, Simone; Andersson, Matti ...; Braun, Slawomir; Sun, Zhengyi; Crispin, Xavier; show more...; Berggren, Magnus; Liu, Xianjie; Fahlman, Mats; show less...

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