Thieno[3,2-b]thiophene-based conjugated copolymers for solution-processable neutral black electrochromism

Abstract

Two neutral black copolymers were prepared by employing PTTPh or PTTTh as complementary segments to supplement the absorption deficiency from PTTBT.

Recent advances in high-performance organic solar cells enabled by acceptor–donor–acceptor–donor–acceptor (A–DA′D–A) type acceptors

“…2,1,3-Benzothiadiazole (BT) and benzotriazole (BTA) are widely utilized electron-deficient building blocks to construct conjugated materials for organic light-emitting diodes, 122,123 organic field-effect transistors, 124 and organic electrochromic devices. 125,126 For OSCs, they are mainly designed as D-A copolymers for donor materials, especially the J-series donors developed by Li et al [127][128][129][130][131] McCulloch and co-workers proposed several BT and BTA based small-molecule acceptors including IDTBR 132 and FBR 133 at an early stage. Nevertheless, the device performance based on these small-molecule acceptors still lags behind for a long period.…”

The Effect of Oligo(Ethylene Oxide) Side Chains: A Strategy to Improve Contrast and Switching Speed in Electrochromic Polymers

“…It is well‐established that side‐chain engineering is an effective tool to improve the processability as well as the physical and optical properties of conjugated polymers . In our previous work, two alkoxyl side chains were introduced onto 3,6‐positions of thieno[3,2‐ b ]thiophene (TT) units of the ECPs to realize desired characteristics including feasible processability, stability and low potential for electrochemical polymerization . Yet, it may be unfavorable for counterion diffusion in polymer films due to the rigid structure of TT unit that results in a more compact morphology.…”

An Efficient Electrochromic Supercapacitor Based on Solution‐Processable Nanoporous Poly{tris[4‐(3,4‐ethylenedioxythiophene)phenyl]amine}

“…Secondly, electrochemically polymerized PTEPAf ilms cannotb ed issolved in common organic solvents, their molecular weights have not been determined, and the processability is limited. [40][41][42][43] Finally,t here has been no report on the energy storagepropertieso fP TEPAori ts application in ECSCs.…”

“…Firstly, because of the toxicity of organotin reagents, conventional Stille coupling reactions are not suitable for environmentally friendly production, alternative “greener” synthesis procedures for the TEPA monomer should be investigated. Secondly, electrochemically polymerized PTEPA films cannot be dissolved in common organic solvents, their molecular weights have not been determined, and the processability is limited . Finally, there has been no report on the energy storage properties of PTEPA or its application in ECSCs.…”