POS5-0938
Channel Conductivity-Dependent Performance and Charge Transport Behaviors of Self-Doped Conjugated Polymer OECTs
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Seunguk Lee (Department of Materials Science and Engineering, Kookmin University, Seoul, Republic of Korea)
Co-Author(s)
Abstract
In this study, we introduce three types of commercial Self-doped Poly(3,4-ethylenedioxythiophene) (S-PEDOT) (SELFTRON®S, SELFTRON®H, and SELFTRON®A) exhibiting different electrical conductivities as channel materials, which simultaneously satisfy high initial electrical conductivity, outstanding flexibility, and excellent processability. Consequently, we systematically compare and analyze the electrical and thermoelectric properties of organic electrochemical transistors (OECTs) depending on the difference in channel conductivity.
Subsequently, we plan to apply a post-treatment process to the S-PEDOT solution or channel film to remove potential residues present in the commercial solution, thereby inducing polymer packing and enhancing conductivity. Furthermore, we aim to elucidate whether the carrier transport mechanism changes due to this post-treatment by performing in situ measurements of the Seebeck coefficient as a function of gate voltage and fitting the experimental data to relevant theoretical models.
To this end, we fabricated OECT devices by coupling a [EMIM][TFSI] ion-gel electrolyte with the S-PEDOT channels of varying conductivities. During device operation, the charge carrier concentration was continuously controlled by actively modulating the doping-dedoping states within the channel via gate voltage regulation, allowing us to evaluate the subsequent changes in OECT performance. Specifically, a non-volatile ion-gel electrolyte was adopted to precisely measure the electrochemical behavior of the S-PEDOT channel as a function of gate voltage in a stable vacuum environment free from external ambient influences.
Subsequently, we plan to apply a post-treatment process to the S-PEDOT solution or channel film to remove potential residues present in the commercial solution, thereby inducing polymer packing and enhancing conductivity. Furthermore, we aim to elucidate whether the carrier transport mechanism changes due to this post-treatment by performing in situ measurements of the Seebeck coefficient as a function of gate voltage and fitting the experimental data to relevant theoretical models.
To this end, we fabricated OECT devices by coupling a [EMIM][TFSI] ion-gel electrolyte with the S-PEDOT channels of varying conductivities. During device operation, the charge carrier concentration was continuously controlled by actively modulating the doping-dedoping states within the channel via gate voltage regulation, allowing us to evaluate the subsequent changes in OECT performance. Specifically, a non-volatile ion-gel electrolyte was adopted to precisely measure the electrochemical behavior of the S-PEDOT channel as a function of gate voltage in a stable vacuum environment free from external ambient influences.
