A5064545113- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- TiO2 Photocatalysis and Solar Cells
- Porphyrin and Phthalocyanine Chemistry
- Chemical Synthesis and Reactions
- Quantum Dots Synthesis And Properties
- Luminescence and Fluorescent Materials
- Synthesis and Properties of Aromatic Compounds
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Photochromic and Fluorescence Chemistry
- Synthesis and Biological Evaluation
- Photochemistry and Electron Transfer Studies
- Catalytic C–H Functionalization Methods
- Chemical Synthesis and Analysis
- Radical Photochemical Reactions
- Pigment Synthesis and Properties
- Synthesis and Reactions of Organic Compounds
- Fullerene Chemistry and Applications
- Metal complexes synthesis and properties
- Synthesis and Characterization of Heterocyclic Compounds
- Transition Metal Oxide Nanomaterials
- Solid-state spectroscopy and crystallography
Dongguk University
2022-2024
Academy of Scientific and Innovative Research
2017-2024
Indian Institute of Chemical Technology
2017-2024
Osmania University
2017-2023
University of Hyderabad
2019-2020
University of Alberta
1990
Two spiro-OMeTAD analogues featuring a spiro[fluorene-9,9-xanthene] central core have been designed and applied in PSCs as dopant-free HTLs. The device based on SP-SMe reveals better performance operational stability than the spiro-OMeTAD-based device.
Organic ammonium salts are widely used for surface passivation to enhance the photovoltaic (PV) performance and stability of perovskite solar cells (PSCs). However, protic nature units results in quick degradation perovskites due hydrogen bonding interaction with water molecules. Recently, organo-sulfur compounds have attracted growing interest as layers on three-dimensional their moisture-resistive behavior. Herein, trimethylsulfonium iodide (TMSI), an aprotic S-based organic compound, is...
We have designed, synthesized, and characterized a donor-acceptor triad,
This is the first report on highest efficiency NIR absorbing Aza-Bodipy small molecules.
Abstract The photochemical reactions perform a progressively important role in the field of green chemistry and organic synthesis from last decades. It has always been considered as eco‐friendly, inexpensive, most abundant endlessly renewable energy source. organoboronic acids esters occupy central position so development novel methodology for preparation organoboron compounds is essential. In recent years, visible light‐induced photoredox catalysis created more influence on different using...
A dye-sensitized solar cell (DSSC) architecture is presented with the high dielectric SrF2 incorporated into a semiconducting TiO2 photoanode (SrF2/TiO2). Polarization at dielectric/semiconductor interface optimum composition of SrF2/TiO2 (%w/w 10/90) enhances charge separation and constant (ε′=6.844 × 106), which tends to increase transport kinetics collection efficiency DSSC by balancing dye loading recombination photoanode. The strong electrostatic shielding responsible for reduced...
Hole-transporting materials (HTMs) play a crucial role in the perovskite solar cells (PSCs). Herein, we have designed and synthesized new hole-transporting molecule, denoted as sp-35, from low-cost, commercially available...
We have developed a novel HTM named SPS-SPX-2TPA for perovskite solar cell applications. This showed the best PCE of 17.39% and maintained 95% their initial even after 600 h. It is three times cheaper cost than Spiro-OMeTAD HTM.
Solution-processable D−π–A−π–D structured two organic small molecules bearing thienyl diketopyrrolopyrrole (TDPP) and furanyl (FDPP) as central acceptor units cyano on the π-bridge phenothiazine terminal donor units, coded TDPP-PTCN FDPP-PTCN, are designed synthesized. The C–H arylation Suzuki coupling protocols have been adopted for synthesizing molecules. Solution-processed solar cells (OSCs) were constructed with these donors phenyl-C71-butyric acid methyl ester yielding power conversion...
Conventional dye-sensitized solar cells (DSSCs) involving charge-transfer interfaces face charge injection losses and offsets for TiO2-sensitizer band alignment. The direct mechanism in DSSCs with catechol (CT, 1,2-benzenediol)-based compounds minimizes the eliminates alignment issues, although photovoltaic performance of corresponding device is very poor due to ultrafast (picosecond) recombination photoexcited electrons. Just as a natural photosystem, structural selectivity toward...
Switching bithiophene for thienothiophene reduces the number of rotational conformations, facilitating self-assembly with minimal effects on electronic structure.
Two small molecules <bold>BYG-1</bold> and <bold>BYG-2</bold> with fluorene donor benzothiadiazole acceptor units connected to the terminal naphthamide group <italic>via</italic> ethyne linker were designed synthesized.
We report the design of novel medium bandgap nonfullerene small molecule acceptor NFSMA SPS-TDPP-2CNRh with A2-π-A1-π-A2 architecture, molecular engineering this material comprising a strong electron-accepting backbone unit DPP (A1) as acceptor, which is attached to dicyanomethylene-3-hexylrhodanine (A2) via furan (π-spacer) linker. systematically studied its structural and optoelectronic properties. The incorporation enhance light absorption electrochemical properties by extending...
Herein, the synthesis of novel acceptor-donor-acceptor (A-D-A)-structured small molecule Si-PO-2CN based on dithienosilole (DTS) as building block flanked by electron-rich phenoxazine (POZ) units, which are terminated with dicyanovinylene, is presented. showed unique electrochemical and photophysical properties has been successfully employed in perovskite solar cells (PSCs) well bulk heterojunction organic (OSCs). The PSCs fabricated dopant-free hole-transport material (HTM) exhibited a...
We report a series of fluorescent “push–pull” helicenes based on aza-[7]helicenes denoted as AZA-FLU, AZA-NPC, AZA-TPA, and AZA-2OMe for the control excited-state dynamics circular dichroism properties parent aza-[7]helicene.
Herein two conjugated donor molecules, TDPP‐POCN and FDPP‐POCN, with planar diketopyrrolopyrrole (DPP) as the core building‐block acceptor unit phenoxazine‐capped acrylonitriles arms are designed synthesized. Solution‐processed bulk‐heterojunction organic solar cells based on blends of small‐molecule donors [6,6]‐phenyl‐C 71 ‐butyric acid methyl ester (PC BM) exhibit promising photovoltaic device performance a maximum power conversion efficiency up to 4.8 % for 3.4 FDPP‐POCN under...
ABSTRACT Polyethylene glycols (PEG) acts as efficient catalysts for the oxidation of bicyclic monoterpenes such borneol, isoborneol, and camphor by ceric ammonium nitrate (CAN), a laboratory desktop reagent, in acetonitrile medium under mineral acid‐free conditions. The kinetics reactions revealed first‐order dependence on both [CAN] [bicyclic terpene]. rate is accelerated with an increase [PEG] linearly, which could be explained considering PEG‐bound oxidant (PEG‐CAN) more reactive species...
Perovskite solar cells (PSCs) have exhibited a tremendous photovoltaic performance over the past few years. However, ionic nature of perovskite and solution‐processable fabrication methods lead to various defects (vacancies, interstitials, antisites) at surface. Incorporating interfacial or surface passivation layers has proved be crucial in passivating these defects. Herein, novel donor–acceptor–donor (D–A–D)‐based bidentate material, namely, BDTBT, consisting benzothiadiazole (BDT) as...
The molecular engineering of the interface modulator between perovskite and hole transporting material (HTM) is crucial to achieving satisfactory performance stability solar cells (PSCs).
We report the synthesis and characterization of a dithienogermole (<bold>DTGe</bold>) based small molecule, named <bold>Ge-PO-2CN</bold>, as donor material for bulk heterojunction (BHJ) organic solar cells (OSCs) hole transport (HTM) dopant-free perovskite (PSCs).