Greener Organic Light-emitting Device Technology for Sustainable Development | Chapter 11 | Advancements in Science and Technology: Paving the Way to a Sustainable Future

Lightening applications in the world consume more than 15% of the total electricity and also contribute to the emission of greenhouse gases. This will further rise worldwide due to the increasing global population. Solid-state lightning application is more power efficient than conventional lightning sources. Organic Light Emitting Device (OLED) technology has revolutionised the field of display and lighting applications. OLED technology is useful as an energy-saving and environmentally friendly lightning way, as it operates at low driving voltage, has a high resolution, and has high brightness. This technology is more power efficient than incandescent lightening, inorganic light emitting devices and liquid crystal displays. Multilayered OLEDs are constituted of different layers such as electron transport layer, emissive layer, hole transport layer and hole blocking layer. These layers are made up of organic materials which makes the OLED biodegradable. If the world is lighted with all OLED lightning then this technology will be highly beneficial for our environment. Here in this chapter, we are highlighting the OLED applications and their impact on greener environment and sustainability.

 

Author (s) Details

 Vandna Nishal
Department of Chemistry, Government College Kosli, Rewari, Haryana, India.

 

Priti Rani
SGTB Khalsa College, University of Delhi, New Delhi, India.

 

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Single Excited Molecular Orbitals’ Contribution in Uv-Vis Absorption of Dichloride-bis(5,7-dichloroquinolin-8-olato)tin(IV): A Recent Study | Chapter 12 | Recent Trends in Chemical and Material Sciences Vol. 1

The absorption spectrum of dichloride-bis(5,7-dichloroquinolin-8-olato)tin(IV) with the chemical formula Q2SnCl2 is computed and compared to experimental data using first-principles methodologies.

The energy correction terms for the excitation energies are calculated using single excited molecular orbitals (SEMO) from the ground state to the excited states of the molecule. This method may be used to determine the contributions of the Columbic interaction between an excited electron and the residual hole in the absorption spectrum during the optical excitation process. The MO energy difference and MO wave functions, as well as the SEMO energy contribution, are computed using the density functional theory (DFT). The findings reveal that incorporating the SEMO's contributions into energy corrections significantly improves the theoretical optical absorption spectrum. The calculations are based on DFT, and this method is used to obtain the necessary parameters and integrals for SEMO computation. This method is preferred over other ab-initio methods for calculating excited states because of its ability to represent MOs for any excitation energy and lower computational cost. The method is being utilised for the first time to calculate the energy of transitions and to specify the electrical transition between MOs, especially in OLED absorption machinery. When the electron-hole interaction is taken into account in the optical mechanism of absorption in the molecule, the theoretical spectrum approaches the experimental spectrum. As a result, the electron-hole interaction, or the interaction between the excited electron and the residual hole, is crucial to the absorption mechanism and must not be overlooked.

Author (s) Details

Dr. A. Allahi
Laser and Plasma Institute, Shahid Beheshti University, Tehran, Iran.

Dr. M. B. Fathi
Department of Solid State, Faculty of Physics, Kharazmi University, Tehran, Iran.

Dr. E. Mohajerani
Laser and Plasma Institute, Shahid Beheshti University, Tehran, Iran.

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