Indenofluorenes for organic optoelectronics: the dance of fused five- and six-membered rings enabling structural versatility

Abstract

Polycyclic π-conjugated hydrocarbons (PCHs), either unfunctionalized or structurally modified derivatives, have attracted tremendous interest in the past few decades as high-performance semiconductors for use in new generations of organic (opto)electronic...

The influence of terminal alkyl groups on the structure, and electrical and sensing properties of thin films of self-assembling organosilicon derivatives of benzothieno[3,2-b][1]benzothiophene

“…Organic semiconductors are promising materials for microelectronics due to their great diversity and tunability of their optoelectronic properties. [1][2][3][4][5][6] These materials are used in the manufacture of different organic electronic devices such as light-emitting diodes, [7][8][9] organic photovoltaics, [10][11][12] organic thin-film transistors (OTFTs), 13,14 and various sensors. [15][16][17][18] The key features of organic semiconductors are their flexibility, low cost, ability to crystallize from solutions and thin film formation.…”

Engineering the HOMO–LUMO gap of indeno[1,2-b]fluorene

“…1A). 6,7 The narrow HOMO-LUMO gap makes this molecule and their derivatives attractive for organic electronic devices 3,[8][9][10] and complementary to acenes. 11 The challenge is to shield the highly reactive apical carbons at the five-membered ring (R group in Fig.…”

n-Type Polymer Semiconductors Based on Dithienylpyrazinediimide

“…π-Conjugated semiconducting polymers have attracted great attention due to their advantages such as light weight, mechanical flexibility, and solution-based processability, which enables the fabrication of various optoelectronic devices in a cost-effective and high-throughput fashion, such as organic thin-film transistors (OTFTs), − organic thermoelectrics (OTEs), and organic solar cells (OSCs). − In the past two decades, tremendous research efforts have been conducted to exploit π-conjugated building blocks to access high-performance semiconducting polymers. , However, the device performance of n-type (electron transporting) polymers is still far behind the p-type (hole transporting) counterparts, which is mainly ascribed to the scarcity of very electron-deficient building blocks with a planar backbone, compact geometry, and good solubility. − Therefore, designing and synthesizing novel electron-deficient building blocks with optimized physicochemical properties is imperative to develop high-performance n-type polymers.…”