Integrating Conjugated Polymers with Bacteriorhodopsin to Realize Quasi Dual‐Gate Organic Field‐Effect Transistors

Author:

Chen Pei‐Yu1,Ko Ling‐Ning2,Chen Yen‐Yu1,Yang Chii‐Shen2ORCID,Lai Yu‐Ying1ORCID

Affiliation:

1. Institute of Polymer Science and Engineering National Taiwan University Taipei 10617 Taiwan

2. Department of Biochemical Science and Technology National Taiwan University Taipei 10617 Taiwan

Abstract

AbstractFour conjugated polymers are integrated with a bacteriorhodopsin D94N‐HmBRI in organic field‐effect transistors (OFETs) with the device architecture of doped Si bottom gate/SiO2 bottom electric/semiconducting polymer/Au electrodes/D94N‐HmBRI top dielectric. Photosensitivity of D94N‐HmBRI in the devices is validated. It is proposed that light activates the conformational change of all‐trans retinal to 13‐cis retinal in D94N‐HmBRI. The D94N‐HmBRI layer then applies momentary dipoles to the semiconductors, affecting threshold voltage, resulting in photosensitivity. Film‐thickness variation, capacitance determination, and grazing‐incidence X‐ray scattering are performed to support the proposed working principle. Quasi dual‐gate OFETs with a highly doped silicon wafer as the bottom gate and light as the top gate are thus realized by combining conjugated polymers with D94N‐HmBRI.

Funder

National Taiwan University

Publisher

Wiley

Subject

Electronic, Optical and Magnetic Materials

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