Conjugated polymers for functional applications: lifetime and performance of polymeric organic semiconductors in organic field‐effect transistors

Abstract

Developments in the performance of organic field‐effect transistors have produced devices with similar, and in some cases even better, charge transport properties compared to amorphous silicon. For devices to be viable in more appliances and industry, their lifetime must be improved. However, advances in lifetime are lagging compared to other properties, such as charge carrier mobilities. The lack of a standardized methodology to evaluate the lifetime adds complications, as this property can mostly be compared qualitatively rather than quantitatively. Still, extension of lifetime has been realized through intelligent design of device architecture or alterations that benefit the stability of a device's active organic semiconducting polymer. More unique methods to improve the stability of organic field‐effect transistors, such as blending the semiconducting layer with other polymers or imposing micro‐/nanostructures in the device, have yielded positive results. © 2020 Society of Chemical Industry

Click‐Functionalization of a Poly(Tetrazine‐co‐Fluorene)‐Conjugated Polymer with a Series of trans‐Cyclooctene Derivatives

“…Since their discovery, conjugated polymers have played an increasingly important role in numerous disruptive technologies. The wide array of structures that constitute the polymer backbone allows their optimization for applications that include lighting and displays, [1] energy generation and storage, [2, 3] sensors, [4, 5] field‐effect transistors, [6, 7] as well as information storage and computing [8] . A variety of conjugated polymer properties can be modified by varying polymer structure, including band gap, HOMO and LUMO levels, extinction coefficient, quantum yield, conductivity, and solubility [9–14] .…”

Organic Semiconductor–Insulator Blends for Organic Field‐Effect Transistors

“…[ 28–31 ] Incorporating inert insulators in OSCs is commonly used for stability enhancement. [ 19,32 ] For example, Lee et al highlighted that the insulator‐tailored device was less vulnerable to the off‐bias stress that manifested as a smaller V th shift over stress time compared with the neat poly(didodecylquaterthiophene‐ alt ‐didodecylbithiazole) (PQTBTz‐C12) device. [ 33 ] A similar study using N , N ′‐bis( n ‐octyl)‐dicyanoperylene‐3,4:9,10‐bis‐(dicarboximide) (PDI8CN2) blended with PS was conducted by Campos et al [ 21 ] Figure 2c,d shows the corresponding temporal evolutions of transfer curves under bias stress.…”

Suzuki–Miyaura Catalyst-Transfer Polycondensation of Triolborate-Type Carbazole Monomers

“…π -Conjugated polymers have attracted immense attention owing to their potential as electroactive and photoactive materials for fabricating various organic electronic devices [ 1 , 2 ] such as organic light-emitting diodes (OLEDs) [ 3 , 4 ], organic field-effect transistors (OFETs) [ 5 , 6 ], organic photovoltaics (OPVs) [ 7 , 8 ], and organic memory devices [ 9 , 10 , 11 ]. Most π -conjugated polymers investigated thus far consisted of thiophene [ 12 , 13 , 14 , 15 , 16 ], phenylene [ 17 , 18 , 19 ], and fluorene [ 20 , 21 , 22 , 23 ] units, which have been accessed through the step-growth polycondensations using cross-coupling reactions, such as Suzuki–Miyaura and Kumada–Corriu coupling.…”