Facile synthesis and optoelectronic properties of thienopyrroledione based conjugated polymer for organic field effect transistors

Opoku, Henry; Choy, Ji-Yeon; Kumar, K. Ashok; Shrestha, Nabeen K.; Rabani, Iqra; Patil, Supriya A.; Sree, Vijaya Gopalan; Bathula, Chinna

doi:10.1016/j.dyepig.2020.108973

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…Ultraviolet Photoelectron Spectroscopy (UPS) and Inverse Photoelectron Spectroscopy (IPES) were used to locate the HOMO and LUMO energy levels, respectively. These two techniques are widely considered (along with cyclic voltammetry) to provide the transport gap of organic semiconductors, which is relevant for investigating both transport and optoelectronic properties 18,19 . UV–visible spectra are collected on solution‐processed films to analyze the effect of ammonia‐induced polymerization on the absorbance and Atomic Force Microscopy (AFM) topographic analysis complemented the UPS and IPES measurements.…”

Section: Introductionmentioning

confidence: 99%

Locating the bandgap edges of eumelanin thin films for applications in organic electronics

Niyonkuru

Carrière

Ambrose

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND Bio‐sourced (natural) organic materials are often chemically and structurally disordered, such that their structure‐property relationships must be explored using model systems. Eumelanin is an interesting candidate among natural organic materials. RESULTS In this work, the locations of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of 5,6‐dihydroxyindole (DHI) and 5,6‐dihydroxyindole‐2‐carboxylic acid (DHICA) building blocks (monomers) of the black‐brown biopigment eumelanin, in film form, are studied. The films are fabricated by the spin‐coating technique (i.e., here indicated as DHI‐ and DHICA‐films), which is sometimes followed by ammonia‐induced solid‐state polymerization (i.e., indicated as AISSP‐DHI and AISSP‐DHICA films), as well as by thermal evaporation (i.e., evaporated DHI and DHICA films). From Ultraviolet photoemission spectroscopy (UPS), we deduced the ionization energies (EI) for all DHI‐ and DHICA‐based films to be in the range of 5.34‐5.56 eV and 5.35‐5.80 eV, respectively. The electron affinities (χE) are measurable using inverse photoemission spectroscopy (IPES) for DHI films (3.80 eV) and both evaporated DHI (4.0 eV) and DHICA (3.9 eV) films. On the other hand, the χE values of DHICA, AISSP‐DHI, and AISSP‐DHICA films are estimated with about 0.5 eV of uncertainty. UV‐visible spectroscopy reveals the preferred chromophoric bands for DHICA, AISSP‐DHICA, and DHI are in the range of 300‐330 nm, while AISSP‐DHI exhibits a broadened UV‐visible absorbance. CONCLUSION Our study paves the way for the design of suitable metal‐eumelanin interfaces for electronic applications. © 2021 Society of Chemical Industry (SCI).

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Section: Introductionmentioning

confidence: 99%

Locating the bandgap edges of eumelanin thin films for applications in organic electronics

Niyonkuru

Carrière

Ambrose

et al. 2021

J of Chemical Tech & Biotech

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“…Because of conjugated electrons and polymer structure, conjugated polymers have good semiconductor properties, such as solution processability, mechanical properties and thermal stability. [1][2][3][4][5][6] In recent years, conjugated polymers have been widely used in producing light, large-area and flexible electronic devices, such as OFETs and organic solar cells (OSCs). [7][8][9][10][11][12] Among conjugated polymers, the polymers composed of electron donors and electron acceptors alternately are called donor-acceptor (D-A) polymers.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that the electronic absorptions, the highest occupied molecular orbital/the lowest unoccupied molecular orbital (HOMO/LUMO) energies, the interaction between chains and the of thinfilm morphologies of D-A polymers can be effectively tuned by properly selecting the electron donors and electron acceptors, thus achieving the purpose of preparing high-performance OFETs. [13][14][15][16] Benzo[c] [1,2,5]thiadiazole (BT) is one of the most widely used acceptor units, and D-A polymers with BT as acceptor have a large number of applications in OFETs and OSCs. [17][18][19] One of the important parameters to evaluate the high performance of OFETs is charge mobility.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Side chain engineering of fluorinated benzothiadiazole‐based polymers: Improving the charge transport in organic field‐effect transistors

Huang

Fang

et al. 2023

Journal of Polymer Science

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Three donor‐acceptor (D‐A) polymers P1–P3 are designed and synthesized, with 4,7‐dibromo‐5,6‐difluorobenzo[c][1,2,5]thiadiazole (FBT) as A and thiophene derivatives as D. All polymers show good thermal stability. The UV–vis absorption spectra show that P1 has too strong aggregation in solution, and it has no obvious temperature‐dependent aggregation (TDA) performance, which is also revealed in the variable temperature UV–vis absorption spectra. P2 film shows the same aggregation as in solution, P3 film shows stronger aggregation than that in solution. Polymers P1 and P2 both have strong TDA properties. Organic field effect transistors (OFETs) are prepared based on polymers P1, P2, and P3. OFETs devices prepared with high molecular weight polymers have better performance, and the polymer with 2‐nonyltridecyl side chain leads to the highest hole mobility around 0.252 cm2 V−1 s−1. The results show that the application of high molecular weight polymers and the selection of appropriate side chains are very important for the charge transport performance of OFETs.

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(Z)-4-(thiophen-2-ylmethylene)-4H-thieno[2,3-b]pyrrol-5(6H)-one based polymers for organic photovoltaics

Pai

Yallur

Adimule³

et al. 2023

J Polym Res

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Facile synthesis and optoelectronic properties of thienopyrroledione based conjugated polymer for organic field effect transistors

Cited by 10 publications

References 24 publications

Locating the bandgap edges of eumelanin thin films for applications in organic electronics

Locating the bandgap edges of eumelanin thin films for applications in organic electronics

Side chain engineering of fluorinated benzothiadiazole‐based polymers: Improving the charge transport in organic field‐effect transistors

(Z)-4-(thiophen-2-ylmethylene)-4H-thieno[2,3-b]pyrrol-5(6H)-one based polymers for organic photovoltaics

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