Shakil N. Afraj

ORCID: 0000-0002-4174-5178
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About
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Research Areas
  • Conducting polymers and applications
  • Perovskite Materials and Applications
  • Organic Electronics and Photovoltaics
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Molecular Junctions and Nanostructures
  • Click Chemistry and Applications
  • Organic Light-Emitting Diodes Research
  • Catalytic Alkyne Reactions
  • Chemical Synthesis and Analysis
  • Cyclopropane Reaction Mechanisms
  • Chalcogenide Semiconductor Thin Films
  • Electrochemical Analysis and Applications
  • Multicomponent Synthesis of Heterocycles
  • Synthesis of Tetrazole Derivatives
  • Synthesis and Biological Evaluation
  • Advanced biosensing and bioanalysis techniques
  • Quantum Dots Synthesis And Properties
  • Synthesis and Reactivity of Heterocycles
  • Organic and Molecular Conductors Research
  • Photochemistry and Electron Transfer Studies
  • Synthesis and biological activity
  • Cancer therapeutics and mechanisms
  • Advanced Memory and Neural Computing
  • Synthetic Organic Chemistry Methods

National Central University
2019-2024

Khalifa University of Science and Technology
2024

National Research Institute of Chinese Medicine
2021

Ministry of Health and Welfare
2021

National Dong Hwa University
2013-2016

Hualien Tzu Chi Medical Center
2016

Abstract Four X‐shaped quinoxaline‐based organic dyes, PQx (1), TQx, (2), PQxD (3), and TQxD (4) (D = dye sensitizers) are developed served as p ‐type self‐assemble monolayer (SAM) for tin perovskite solar cells (TPSC). Thermal, optical, electrochemical properties of these SAMs thoroughly investigated characterized. Tin layers successfully deposited on four SAM surfaces according to a two‐step approach the devices exhibit power conversion efficiency in order (8.3%) > TQx (8.0%) (7.1%)...

10.1002/adfm.202213939 article EN Advanced Functional Materials 2023-02-23

The embedding of non-fullerene acceptor INDCDTT-b16 to PM6:Y6 binary blend devices enables the adjustment morphology, leading improvements in carrier mobility, bimolecular/trap-assisted recombination, and charge collection, promotes a PCE 16.27%.

10.1039/d3tc04294d article EN Journal of Materials Chemistry C 2024-01-01

High-performance and durable perovskite solar cells (PSCs) have advanced rapidly, enabled in part by the development of superior interfacial hole-transporting layers (HTLs). Here, a new series 2,3-diphenylthieno[3,4-b]pyrazine (DPTP)-based small molecules containing bis- tetrakis-triphenyl amino donors (1–3) was synthesized from simple, low-cost, readily available starting materials. The matched energy levels, ideal surface topographies, high hole mobilities 8.57 × 10–4 cm2 V–1 S–1, stable...

10.1021/acsenergylett.2c00684 article EN ACS Energy Letters 2022-05-31

Abstract The effect of heteroalkyl (‐XR, X = Se, S, O) substitution on a series molecular semiconductors having 3,3′‐diheteroalkyl‐2,2′‐bithiophene (XBT) central core is studied. Thus, the selenotetradecyl (‐SeC 14 H 29 ) SeBT investigated by end‐functionalization with two dithienothiophene (DTT), thienothiophene (TT), and thiophene (T) units to give SeBTs 1 – 3 , respectively, for π‐conjugation examination. Furthermore, selenodecyl 10 21 selenohexyl 6 13 cores end‐capped DTTs 1B 1C are...

10.1002/adfm.202200880 article EN cc-by Advanced Functional Materials 2022-03-31

Well-performing organic–inorganic halide perovskites are susceptible to poor efficiency and instability due their various defects at the interphases, grain boundaries (GBs), surfaces. In this study, an in situ method is utilized for effectively passivating under-coordinated Pb2+ of perovskite with new non-fullerene acceptors (NFAs) (INXBCDT; X = H, Cl, Br) through carbonyl cyano functional groups during antisolvent dripping process. It reveals that bicyclopentadithiophene (BCDT) core highly...

10.1021/acsami.3c15774 article EN cc-by ACS Applied Materials & Interfaces 2024-01-26

A novel quinoidal thienoisoindigo (TII)-containing small molecule family with dicyanomethylene end-capping units and various alkyl chains is synthesized as n-type organic molecules for solution-processable field effect transistors (OFETs). The molecular structure of the 2-hexyldecyl substituted derivative, TIIQ-b16, determined via single-crystal X-ray diffraction shows that TIIQ core planar exhibits layers stacked in a "face-to-face" arrangement short intermolecular distances 3.28 Å. very...

10.1002/advs.202002930 article EN cc-by Advanced Science 2020-11-20

New solution processable 3,5-dithioalkyl dithienothiophene (DSDTT) based small molecular semiconductors end functionalized with various (fused) thiophenes including (DTT), thienothiophene (TT), and thiophene (T) are synthesized characterized in organic field effect transistors (OFETs). The new DSDTT core was via a one-pot [1 + 1 1] methodology. For comparison, non-thiolated 3,5-dialkyl (DRDTT) molecules also prepared characterized. Optical, electrochemical, computed electronic structures of...

10.1021/acs.chemmater.9b03967 article EN Chemistry of Materials 2020-02-10

Abstract This work presents a series of novel quinoidal organic semiconductors based on diselenophene‐dithioalkylthiophene ( DSpDST ) conjugated cores with various side‐chain lengths (‐thiohexyl, ‐thiodecyl, and ‐thiotetradecyl, designated DSpDSTQ‐6 , DSpDSTQ‐10 DSpDSTQ‐14 respectively). The purpose this research is to develop solution‐processable using dicyanomethylene end‐capped small molecules for field effect transistors (OFETs) application. physical, electrochemical, electrical...

10.1002/advs.202305361 article EN cc-by Advanced Science 2023-12-14

The molecular structure of INDCDT-b8-Cl, which is rich in carbonyl and cyano functional groups, used as an interfacial modified layer for PSCs.

10.1039/d3tc04663j article EN Journal of Materials Chemistry C 2024-01-01

Abstract Three functionalized thienopyrazines ( TP s), TP‐MN 1 ), TP‐CA 2 and TPT‐MN 3 ) were designed synthesized as self‐assembled monolayers (SAMs) deposited on the NiOx film for tin‐perovskite solar cells (TPSCs). Thermal, optical, electrochemical, morphological, crystallinity, hole mobility, charge recombination properties, well DFT‐derived energy levels with electrostatic surface potential mapping of these SAMs, have been thoroughly investigated discussed. The structure single crystal...

10.1002/ange.202407228 article EN cc-by-nc-nd Angewandte Chemie 2024-07-08

We developed three Self-assembled monolayer (SAM) molecules, PTz2 (1), and PTz (2) PTzBr (3) investigated the mixing of guanidinium (GA) methylammonium (MA) cations at A-site, alongside...

10.1039/d4ta07975b article EN Journal of Materials Chemistry A 2025-01-01

Abstract This review highlights our recent efforts in the development of organic semiconductors based on anthradithiophene (ADT), dithienothiophene (DTT), tetrathienoacene (TTA), benzothienodithiophene (BTDT), benzothienothiophene (BTT), chalcogen‐planarized BT, and some quinoidal oligothiophenes for application thin‐film transistors (OTFTs). We visualized various strategies that have been employed molecular architecture to improve stability as well solubility, energy levels are tuned...

10.1002/jccs.202200214 article EN Journal of the Chinese Chemical Society 2022-07-17

New dicyclopentadithienothiophene (DCDTT) based non-fullerene acceptors 1–3 are introduced into PSC films. The INCl-DCDTT−perovskite hybrid film exhibits an excellent power conversion efficiency of 21.39%.

10.1039/d2ta00617k article EN Journal of Materials Chemistry A 2022-01-01

A one-pot green and highly efficient method for the synthesis of propargylamines distereoselective fused triazoles <italic>via</italic> three-component coupling in presence manganese(<sc>ii</sc>) chloride a catalyst-free 1,3-dipolar cycloaddition reaction without using co-catalyst is reported.

10.1039/c4ra03232b article EN RSC Advances 2014-01-01

The 3,5-dithiooctyl dithienothiophene based small molecular semiconductor DDTT-DSDTT (1), end functionalized with fused (DTT) units, was synthesized and characterized for organic field effect transistors (OFET). thermal, optical, electrochemical, computed electronic structural properties of 1 were investigated contrasted. single crystal structure reveals the presence intramolecular locks between S(alkyl)···S(thiophene), a very short S–S distance 3.10 Å, planar core. When measured in an OFET...

10.1021/acsnano.0c07003 article EN ACS Nano 2020-11-30

Regioregular polythiophenes have been widely used in organic electronic applications due to their solution processability with chemical modification through side chain engineering, as well microstructural organization and good hole transport properties. Here, we introduce alkylthio chains, (poly[(3-alkylthio)thiophene]s; P3ATTs), strong noncovalent sulfur molecular interactions, main thienyl backbones. These P3ATTs were compared alkyl-substituted polythiophene (poly(3-alkylthiophene); P3AT)...

10.1021/acsami.1c04404 article EN ACS Applied Materials & Interfaces 2021-06-30

Three functionalized thienopyrazines (TPs), TP-MN (1), TP-CA (2), and TPT-MN (3) were designed synthesized as self-assembled monolayers (SAMs) deposited on the NiOx film for tin-perovskite solar cells (TPSCs). Thermal, optical, electrochemical, morphological, crystallinity, hole mobility, charge recombination properties, well DFT-derived energy levels with electrostatic surface potential mapping of these SAMs, have been thoroughly investigated discussed. The structure (1) single crystal was...

10.1002/anie.202407228 article EN cc-by-nc-nd Angewandte Chemie International Edition 2024-08-23

Improving perovskite film quality is essential for making solar cells with enhanced performance. A critical bottleneck progress in cell science the lack of a scalable coating method that can be used industrial manufacturing. This study investigated combined cooperation methylammonium acetate (MAAc) additive doping precursor solution and mixed nonfullerene small-molecule semiconductor (DCDTT) chlorobenzene an antisolvent spraying treatment preparation ultrasonic spray-coated film....

10.1021/acsaem.1c03485 article EN ACS Applied Energy Materials 2022-03-16

Abstract A practical and efficient two‐step protocol for the synthesis of several new 4,6,7,8,8 a ,9‐hexahydropyrrolo[1,2‐ ][1,2,3]triazolo[1,5‐ d ]pyrazines is described. The first step involves AuBr 3 ‐catalyzed three‐component coupling reaction terminal alkynes, aldehydes, amines under solvent‐free conditions to provide requisite propargylamines. tolerates high structural diversity, requires only short times, gives diastereoselectivities, environmentally benign. Furthermore,...

10.1002/ejoc.201300226 article EN European Journal of Organic Chemistry 2013-05-17

Abstract Three new solution‐processable organic semiconductors ( 1–3 ) are synthesized and characterized for p‐type field effect transistors (OFETs). The backbone of these small molecules is modified by expanding the central core conjugation from thienothiophene TT to dithienothiophene DTT tetrathienoacene TTA ), which end‐capped with soluble β‐substituted alkyl chains dithienothiophenes DTTR generate DTTR‐TT 1 DTTR‐DTT 2 DTTR‐TTA 3 ). highest mobility 0.016 cm V −1 s achieved using...

10.1002/admt.202001028 article EN Advanced Materials Technologies 2021-02-10

Abstract Triphenylamine‐based Y‐shaped organic sensitizers, specifically TPA‐MN ( 1 ), TPA‐CA (2 TPAT‐MN 3 and TPAT‐CA 4 are synthesized utilized as p ‐type self‐assembled monolayers (SAMs) for tin‐based perovskite solar cells (TPSCs). These SAMs developed using low‐cost starting materials, primarily from triphenylamine (TPA) components. An extensive analysis is conducted to examine the crystalline, morphological, thermal, optical, electrochemical, optoelectronic characteristics of – ,...

10.1002/smll.202408638 article EN cc-by-nc-nd Small 2024-11-16

Abstract A simple method to synthesize propargylamines along with the highly diastereoselective synthesis of a series 4,6,7,8,8a,9‐hexahydropyrrolo[1,2‐ ][1,2,3]triazolo[1,5‐ d ]pyrazines has been developed. The three‐component coupling aldehydes, amines, and alkynes (A 3 ‐coupling), which proceeds through C−H activation process tin(II) chloride as catalyst, metal‐free [3+2] cycloaddition reaction were used prepare fused heterocycles, respectively, without need cocatalyst or activator. is...

10.1002/ajoc.201500471 article EN Asian Journal of Organic Chemistry 2015-12-14

The ternary strategy boosts the performance of organic photovoltaics (OPVs) by optimizing light-harvesting, energy level alignment, and blend morphology. Herein, three non-fullerene acceptors (NFAs), IN-DTPT-b20 (1), INF-DTPT-b20(2) INCl-DTPT-b20 (3)...

10.1039/d4tc03335c article EN Journal of Materials Chemistry C 2024-01-01
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