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Designing of DAD Type Small Semiconductor Molecules andInvestigation of Substituent Effect on Their Molecular, Electronic and Optical Properties: A DFT Study**

Sirin, Pinar Seyitdanlioglu; Kahya, Naime Didem; Unaleroglu, Canan


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{
  "DOI": "10.1002/slct.202103353", 
  "abstract": "The design of multi-purpose semiconductor materials has become a major challenge in organic electronics. In this work, we designed DAD type 30 small molecules with thiophene as donor and phthalimide/benzimidazole/benzotriazole as acceptor groups and investigated their structural, electronic and optical properties via computational methods. E-HOMO, E-LUMO of the designed molecules were calculated with DFT and TD-DFT methods at HSEH1PBE functional with the 6-31+G** basis set. HOMO-LUMO gaps of the designed molecules were ranged between 2.25-3.41 eV. When an amino group is used as a substituent, the lowest HOMO-LUMO gaps (2.25-2.95 eV) were obtained with increasing HOMO level. Reorganization energies were calculated for hole or electron transport properties of the representative molecules. Benzotriazole based DAD compound, which is N-Phenyl bearing p-formyl substituted, has the smallest hole reorganization energy as a promising p-type organic semiconductor. High open-circuit voltages were obtained for aldehyde, carboxylic acid and ester substituted structures. This study presents a valuable insight to the experimental studies in designing new photovoltaics and electrochemical biosensors.", 
  "author": [
    {
      "family": "Sirin", 
      "given": " Pinar Seyitdanlioglu"
    }, 
    {
      "family": "Kahya", 
      "given": " Naime Didem"
    }, 
    {
      "family": "Unaleroglu", 
      "given": " Canan"
    }
  ], 
  "container_title": "CHEMISTRYSELECT", 
  "id": "234690", 
  "issue": "40", 
  "issued": {
    "date-parts": [
      [
        2021, 
        1, 
        1
      ]
    ]
  }, 
  "page": "10793-10801", 
  "title": "Designing of DAD Type Small Semiconductor Molecules andInvestigation of Substituent Effect on Their Molecular, Electronic and Optical Properties: A DFT Study**", 
  "type": "article-journal", 
  "volume": "6"
}
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