The fabrication of organic optoelectronic devices integrating asymmetric electrodes enables optimal charge injection/extraction at each individual metal/semiconductor interface. This is key for applications in devices such as solar cells, light-emitting transistors, photodetectors, inverters, and sensors. Here, we describe a new method for the asymmetric functionalization of gold electrodes with different thiolated molecules as a viable route to obtain two electrodes with drastically different work function values. The process involves an ad hoc design of electrode geometry and the use of a polymeric mask to protect one electrode during the first functionalization step. Photoelectron yield ambient spectroscopy and X-ray photoelectron spectrometry were used to characterize the energetic properties and the composition of the asymmetrically functionalized electrodes. Finally, we used poly(3-hexylthiophene)-based organic thin-film transistors to show that the asymmetric electronic response stems from the different electronic structures of the functionalized electrodes.

Asymmetric Injection in Organic Transistors via Direct SAM Functionalization of Source and Drain Electrodes / Mosciatti, Thomas; Greco, Pierpaolo; Leydecker, Tim; Eredia, Matilde; Biscarini, Fabio; Samorì, Paolo. - In: ACS OMEGA. - ISSN 2470-1343. - 2:7(2017), pp. 3502-3508. [10.1021/acsomega.7b00690]

Asymmetric Injection in Organic Transistors via Direct SAM Functionalization of Source and Drain Electrodes

BISCARINI, FABIO;
2017-01-01

Abstract

The fabrication of organic optoelectronic devices integrating asymmetric electrodes enables optimal charge injection/extraction at each individual metal/semiconductor interface. This is key for applications in devices such as solar cells, light-emitting transistors, photodetectors, inverters, and sensors. Here, we describe a new method for the asymmetric functionalization of gold electrodes with different thiolated molecules as a viable route to obtain two electrodes with drastically different work function values. The process involves an ad hoc design of electrode geometry and the use of a polymeric mask to protect one electrode during the first functionalization step. Photoelectron yield ambient spectroscopy and X-ray photoelectron spectrometry were used to characterize the energetic properties and the composition of the asymmetrically functionalized electrodes. Finally, we used poly(3-hexylthiophene)-based organic thin-film transistors to show that the asymmetric electronic response stems from the different electronic structures of the functionalized electrodes.
12-lug-2017
2
7
3502
3508
Asymmetric Injection in Organic Transistors via Direct SAM Functionalization of Source and Drain Electrodes / Mosciatti, Thomas; Greco, Pierpaolo; Leydecker, Tim; Eredia, Matilde; Biscarini, Fabio; Samorì, Paolo. - In: ACS OMEGA. - ISSN 2470-1343. - 2:7(2017), pp. 3502-3508. [10.1021/acsomega.7b00690]
Mosciatti, Thomas; Greco, Pierpaolo; Leydecker, Tim; Eredia, Matilde; Biscarini, Fabio; Samorì, Paolo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1143949
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