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Doroftei C, Leontie L, Danac R, Matarneh CMA, Carlescu A. Exploring Pyrrolo-Phenanthrolines as Semiconductors for Potential Implementation in Organic Electronics. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093366. [PMID: 37176248 PMCID: PMC10179610 DOI: 10.3390/ma16093366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/20/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023]
Abstract
This paper describes the synthesis and characterization of new organic semiconductors based on pyrrolo[1,2-i][1,7]phenanthrolines in the form of thin layers. The thin layers, produced via the spin coating method (with a thickness of 10-11 μm), were investigated for their electrical and optical properties. After heat treatment at temperatures ranging from 210 to 240 °C, the layers displayed consistent and reproducible properties. The layers exhibited n-type semiconductor behavior, with a thermal activation energy (Ea) in the range of 0.75-0.78 eV. Additionally, the layers showed transmittance values of 84-92% in the visible and near-infrared spectral ranges, with a direct optical band gap (Egod) ranging from 3.13 to 4.11 eV. These thin layers have potential applications in electronic devices such as thermistors, as well as in nanoelectronics and optoelectronics. Overall, these new organic semiconductors show promising properties for practical implementation in various electronic applications.
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Affiliation(s)
- Corneliu Doroftei
- Science Research Department, Institute of Interdisciplinary Research, Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
| | - Liviu Leontie
- Science Research Department, Institute of Interdisciplinary Research, Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
| | - Ramona Danac
- Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
| | - Cristina-Maria Al Matarneh
- Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
- Institute of Macromolecular Chemistry "Petru Poni", Aleea Ghica Voda, No. 41A, 700487 Iasi, Romania
| | - Aurelian Carlescu
- Science Research Department, Institute of Interdisciplinary Research, Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
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Doroftei C, Carlescu A, Leontie L, Danac R, Al-Matarneh CM. Structural, Electrical and Optical Properties of Pyrrolo[1,2- i][1,7] Phenanthroline-Based Organic Semiconductors. MATERIALS 2022; 15:ma15051684. [PMID: 35268915 PMCID: PMC8911188 DOI: 10.3390/ma15051684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 02/05/2023]
Abstract
This work reports a study on structural, electrical and optical properties of some recently synthesized pyrrolo[1,2-i][1,7] phenanthrolines derivatives in thin films. The thin films were deposited onto glass substrates by spin coating technique, using chloroform as solvent. The obtained films exhibited a polycrystalline structure with an n–type semiconductor behavior after heat treatment in the temperature range 293–543 K, specific to each sample. The thermal activation energy lies between 0.68 and 0.78 eV, while the direct optical band gap values were found in the range 4.17–4.24 eV. The electrical and optical properties of the investigated organic semiconductor films were discussed in relation to microstructural properties, determined by the molecular structure. The investigated organic compounds are promising for applications in organic optoelectronics and nanoelectronics.
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Affiliation(s)
- Corneliu Doroftei
- Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Science Research Department, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania; (C.D.); (L.L.)
| | - Aurelian Carlescu
- Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Science Research Department, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania; (C.D.); (L.L.)
- Correspondence:
| | - Liviu Leontie
- Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Science Research Department, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania; (C.D.); (L.L.)
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania
| | - Ramona Danac
- Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania; (R.D.); (C.M.A.-M.)
| | - Cristina Maria Al-Matarneh
- Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania; (R.D.); (C.M.A.-M.)
- Institute of Macromolecular Chemistry “Petru Poni”, Aleea Ghica Voda, No. 41A, 700487 Iasi, Romania
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Ni2+ substituted Mg-Cu-Zn ferrites by molten salt route: Evaluation of structural, morphological and electromagnetic properties. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2018.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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