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    • Keywords


      N-doped Polyaromatic Hydrocarbons; perylene; dye-sensitized solar cells; metal-free organic dyes; DFT

    • Abstract


      This paper reports designing a series of new D-p-A topology-based metal-free organic dye molecules using ullazine and perylene by DFT methods. This work emphasizes the combination of ullazine analogs as donors and perylene dicarboxylic anhydride as an acceptor along with acetylene linker as p-bridgefor DSSC applications. The structural and optoelectronic properties of dyes before and after adsorption on to TiO2 semiconductor have been investigated. The screening of the designed dyes is carried out based on the energy gap (Eg), maximum absorption wavelength (kmax), light-harvesting efficiency (LHE), excited-state lifetime (s), the free energy of electron injection (DGinj) and regeneration (DGreg). DFT results reveal that the presence of ullazine analogs as a donor reduces the energy gap (Eg) and leads to red-shift in absorptionmaximum. Further, two different binding modes of dye molecules with (TiO2)38 cluster have been investigated to unravel the binding associated changes in the electronic structure. The results show that the completely dissociated bidentate bridging (CBB2) mode is more favorable, which contains two carboxylic groups.Findings emphasize the remarkable charge transfer characteristics which favors the fast electron injection from excited dye to the conduction band of TiO2. For the first time, this study provides comprehensive structural and electronic information combined with the Dye-TiO2 interactions for the development of perylene based dyes for DSSC applications

    • Author Affiliations



      1. Inorganic and Physical Chemistry Laboratory (Chemical Laboratory), CSIR - Central Leather Research Institute, Adyar, Chennai, Tamilnadu 600 020, India
      2. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
      3. Department of Chemistry, University of Delhi, New Delhi 110 021, India
      4. Centre for High Computing, CSIR-CLRI, Adyar, Chennai, Tamilnadu 600 020, India
    • Dates

  • Journal of Chemical Sciences | News

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      Posted on July 25, 2019

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