Molecular Tailoring of New Thieno(bis)imide-Based Semiconductors for Single Layer Ambipolar Light Emitting Transistors
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- 作者：Manuela Melucci ; Laura Favaretto ; Massimo Zambianchi ; Margherita Durso ; Massimo Gazzano ; Alberto Zanelli ; Magda Monari ; Maria G. Lobello ; Filippo De Angelis ; Viviana Biondo ; Gianluca Generali ; Stefano Troisi ; Wouter Koopman ; Stefano Toffanin ; Raffaella Capelli ; Michele Muccini
- 刊名：Chemistry of Materials
- 出版年：2013
- 出版时间：March 12, 2013
- 年：2013
- 卷：25
- 期：5
- 页码：668-676
- 全文大小：539K
- 年卷期：v.25,no.5(March 12, 2013)
- ISSN：1520-5002
文摘
Organic molecular semiconductors are key components for a new generation of low cost, flexible, and large area electronic devices. In particular, ambipolar semiconductors endowed with electroluminescent properties have the potential to enable a photonic field-effect technology platform, whose key building blocks are the emerging organic light-emitting transistor (OLET) devices. To this aim, the design of innovative molecular configurations combining effective electrical and optical properties in the solid state is highly desirable. Here, we investigate the effect of the insertion of a thieno(bis)imide (TBI) moiety as end group in highly performing unipolar oligothiophene semiconductors on the packing, electrical, and optoelectronic properties of the resulting materials. We show that, regardless of the HOMO鈥揕UMO energy, orbital distribution, and molecular packing pattern, a TBI end moiety switches unipolar and nonemissive oligothiophene semiconductors to ambipolar and electroluminescent materials. Remarkably, the newly developed materials enabled the fabrication of single layer molecular ambipolar OLETs with optical power comparable to that of the equivalent polymeric single layer devices.