A Thienoisoindigo-Naphthalene Polymer with Ultrahigh Mobility of 14.4 cm²/V·s That Substantially Exceeds Benchmark Values for Amorphous Silicon Semiconductors

Abstract

By considering the qualitative benefits associated with solution rheology and mechanical properties of polymer semiconductors, it is expected that polymer-based electronic devices will soon enter our daily lives as indispensable elements in a myriad of flexible and ultra low-cost flat panel displays. Despite more than a decade of research focused on designing and synthesizing state-of-the-art polymer semiconductors for improving charge transport characteristics, the current mobility values are still not sufficient for many practical applications. The confident mobility in excess of ∼10 cm(2)/V·s is the most important requirement for enabling the realization of the aforementioned near-future products. We report on an easily attainable donor-acceptor (D-A) polymer semiconductor: poly(thienoisoindigo-alt-naphthalene) (PTIIG-Np). An unprecedented mobility of 14.4 cm(2)/V·s, by using PTIIG-Np with a high-k gate dielectric poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE)), is achieved from a simple coating processing, which is of a magnitude that is very difficult to obtain with conventional TFTs by means of molecular engineering. This work, therefore, represents a major step toward truly viable plastic electronics.

Electroactive and Photoactive Poly[Isoindigo-alt-EDOT] Synthesized Using Direct (Hetero)Arylation Polymerization in Batch and in Continuous Flow

“…Three different ligands were tested: PCy 3 ·HBF 4 ,P ( t-Bu) 3 · HBF 4 and P(o-anysil) 3 . The P(o-anysil) 3 ligand allowed the formation of the highest-molecular-weight material (see Table 1, entries 1 to 3).…”

“…The P(o-anysil) 3 ligand allowed the formation of the highest-molecular-weight material (see Table 1, entries 1 to 3). After Soxhlet extractions with acetone and hexanes, a polymer with a number-average molecular weight (M n ) of 93 kg/mol and a weight-average molecular weight (M w ) of 210 kg/mol, soluble in chloroform, was obtained.…”

High‐Mobility Naphthalene Diimide and Selenophene‐Vinylene‐Selenophene‐Based Conjugated Polymer: n‐Channel Organic Field‐Effect Transistors and Structure–Property Relationship

“…[1][2][3][4][5][6][7] Such progress coupled with the high compatibility of solution-processable organic semiconductors with plastic or metal foil substrates makes them ideal candidates for cost-effective, mechanically flexible electronic devices for various applications, such as printed radio frequency identification tags for item-level tagging, drivers for flexible displays, wearable electronics, distributed sensors, and integrated, nonvolatile memory devices. [8][9][10][11][12][13][14][15][16][17][18][19][20] [21][22][23][24][25] Such remarkable p-channel mobilities, obtained in devices with fairly promising shelf-life and operational stabilities, have been demonstrated with conjugated polymers based on new building units, such as diketopyrrolopyrrole, [24,26,27] isoindigo, [28,29] and indacenodithiophene. [30] Similar efforts have been devoted to improving n-channel polymer semiconductors, with the performances of n-type devices still lagging behind their p-channel counterparts.…”

How intermolecular geometrical disorder affects the molecular doping of donor–acceptor copolymers

“…D-A copolymers have revolutionized the field of organic electronics by showing single-junction solar cells reaching close to 10% power conversion efficiency 17 , carrier mobility 410 cm 2 V À 1 s À 1 in field effect transistors 18 and bipolar transport 19 . The most important feature of D-A copolymers is the possibility of finely tuning the energy bandgap via the selection of the two moieties 20 .…”