Method of using a four terminal hybrid silicon/organic field effect sensor device

US7538538B2 · kind B2 · utility

Assignee

• The Board of Regents of the University of Texas System · US

Inventors

• Ananth Dodabalapur · Millington, US
• Deepak Sharma · Kanchinakote, IN
• Daniel Fine · Peabody, US

Key dates

• Filing date: Jun 5, 2008
• Grant date: May 26, 2009
• Expiry date: Jun 5, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/0002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A four terminal field effect device comprises a silicon field effect device with a silicon N-type semiconductor channel and an N+ source and drain region. An insulator is deposited over the N-type semiconductor channel. An organic semiconductor material is deposited over the insulator gate forming a organic semiconductor channel and is exposed to the ambient environment. Drain and source electrodes are deposited and electrically couple to respective ends of the organic semiconductor channel. The two independent source electrodes and the two independent drain electrodes form the four terminals of the new field effect device. The organic semiconductor channel may be charged and discharged electrically and have its charge modified in response to chemicals in the ambient environment. The conductivity of silicon semiconductor channel is modulated by induced charges in the common gate in response to charges in the organic semiconductor channel.