Carrier Transport Enhancement in Conjugated Polymers through Interfacial Self-Assembly of Solution-State Aggregates
KAUST DepartmentKAUST Solar Center (KSC)
Material Science and Engineering Program
Office of the VP
Organic Electronics and Photovoltaics Group
Physical Science and Engineering (PSE) Division
Online Publication Date2016-07-22
Print Publication Date2016-08-03
Permanent link to this recordhttp://hdl.handle.net/10754/617235
MetadataShow full item record
AbstractWe demonstrate that local and long range orders of poly(3-hexylthiophene) (P3HT) semicrystalline films can be synergistically improved by combining chemical functionalization of the dielectric surface with solution-state disentanglement and pre-aggregation of P3HT in a theta solvent, leading to a very significant enhancement of the field effect carrier mobility. The pre-aggregation and surface functionalization effects combine to enhance the carrier mobility nearly 100-fold as compared with standard film preparation by spin-coating, and nearly 10-fold increase over the benefits of pre-aggregation alone. In situ quartz crystal microbalance with dissipation (QCM-D) experiments reveal enhanced deposition of pre-aggregates on surfaces modified with an alkyl-terminated self-assembled monolayer (SAM) in comparison to un-aggregated polymer chains. Additional investigations reveal the combined pre-aggregation and surface functionalization significantly enhances local order of the conjugated polymer through planarization and extension of the conjugated backbone of the polymer which clearly translate to significant improvements of carrier transport at the semiconductor-dielectric interface in organic thin film transistors. This study points to opportunities in combining complementary routes, such as well-known pre-aggregation with substrate chemical functionalization, to enhance the polymer self-assembly and improve its interfacial order with benefits for transport properties.
CitationCarrier Transport Enhancement in Conjugated Polymers through Interfacial Self-Assembly of Solution-State Aggregates 2016 ACS Applied Materials & Interfaces
SponsorsPart of this work was supported by the King Abdullah University of Science and Technology (KAUST). CHESS is supported by NSF & NIH/NIGMS via NSF award DMR-1332208. AA is grateful to SABIC for the Career Development SABIC Chair.
PublisherAmerican Chemical Society (ACS)
- Balanced Ambipolar Organic Field-Effect Transistors by Polymer Preaggregation.
- Authors: Janasz L, Luczak A, Marszalek T, Dupont BGR, Jung J, Ulanski J, Pisula W
- Issue date: 2017 Jun 21
- Cyclopentadithiophene-Benzothiadiazole Donor-Acceptor Polymers as Prototypical Semiconductors for High-Performance Field-Effect Transistors.
- Authors: Li M, An C, Pisula W, Müllen K
- Issue date: 2018 May 15
- Solvent Additive-Assisted Anisotropic Assembly and Enhanced Charge Transport of π-Conjugated Polymer Thin Films.
- Authors: Jeong JW, Jo G, Choi S, Kim YA, Yoon H, Ryu SW, Jung J, Chang M
- Issue date: 2018 May 30
- Enhancing Carrier Mobilities in Organic Thin-Film Transistors Through Morphological Changes at the Semiconductor/Dielectric Interface Using Supercritical Carbon Dioxide Processing.
- Authors: Dong BX, Amonoo JA, Purdum GE, Loo YL, Green PF
- Issue date: 2016 Nov 16
- Nucleation, Growth, and Alignment of Poly(3-hexylthiophene) Nanofibers for High-Performance OFETs.
- Authors: Persson NE, Chu PH, McBride M, Grover M, Reichmanis E
- Issue date: 2017 Apr 18