The Study of Optical Properties Exciton Based of Molecular Quantum Dot

محورهای موضوعی : Journal of Physical & Theoretical Chemistry

Ali Mahmoudloo ¹ (Department of Basic Science, Farhangian University, Tehran. Iran)

تاریخ دریافت : 1401/11/13 تاریخ پذیرش : 1401/12/26 تاریخ انتشار : 1401/03/11

کلید واژه: Exciton binding energy, Quantum dots molecule, Molar coefficient, Photo generation,

چکیده مقاله :

Optical properties of semiconductors, dielectrics and metals play a key role in the development of thin film solar cells. While these devices belong to photon photodetectors both the photon and wave nature of light affects their performance. Some of these problems are discussed. In this Paper we Solve the Schrodinger equation using the numerical method of finite difference approximation and assume that the structure of our quantum dot molecule is two cubic GaAs quantum dots in the AlxGa1-xAs medium with dimensions .By simulation the energy of exciton dependence with different molar coefficients, it was observed that: In sample, the exciton binding energy decreases with increasing molar coefficient. At a constant molar coefficient, the exciton dependence energy increases as the potential barrier width increases. At a constant molar coefficient, the exciton binding energy increases as the potential well width increases.

منابع و مأخذ:

• Brabec, C. J., Sariciftci, N. S., Hummelen, J. C., “ Plastic Solar Cells.”, Adv. Funct. Mater, 2001, 11 15-27.


• rebs, F. C., “Fabrication and processing of polymer solar cells: A review of printing and coating techniques”. Sol. Energy Mater. Sol. Cells, 2009, 93, 394-412.


• Li, G., Zhu, R. Yang, Y., “Polymer solar cells.”, Nature Photon., 2012,6, 153-161.


• Hoppe, H., Sariciftci, N. S., “Organic solar cells: An overview.” Mater. Res., 2004, 19,192- 199.


• Wei, M. k., C.Lin, C. W.,Yang, C. C., Kiang, Y.W., Lee, J. H., “Emission characteristics of organic light-emitting diodes and organic thin-films with planar and corrugated structures.” J. Mol. Sci., 2010, 11, 1527-1545.


• Kappaun, S., Slugovc, C., E. List, J. W., “Phosphorescent organic light-emitting devices: Working principle and iridium-based emitter materials.” J. Mol. Sci., 2008, 9, 1527-1547.


• Liang, C., Wang, Y., D., “Modeling and simulation of bulk heterojunction polymer solar cells.” Energy Mater. Sol. Cells, 2014, 127, 67–86.


• Tromholt, T., Manceau, M., M.,” Degradation of semiconducting polymers by concentrated sunlight.” Energy Mater. Sol. Cells, 2011, 95, 130-142.


• Zhou, Y., Pei, J.,” Donor- Acceptor Molecule as the Acceptor for Polymer-Based Bulk Heterojunction Solar Cells.” Phys. Chem. C, 2009,113, 78-87.


• Rezzonico, D., B. Perucco, B.,” Numerical analysis of exciton dynamics in organic light-emitting devices and solar cells.” of Photonics for Energy, 2011, 1, 105-113.


• Kotlarski, J. D., Koster, L. J.,” Combined optical and electrical modeling of polymer:fullerene bulk heterojunction solar cells.” Appl. Phys, 2008, 103, 92- 101.


• Fallahpour, A. H., Gagliardi, A.,” Monte Carlo Modeling and simulation of energetically disordered organic solar cells.” Appl. Phys, 2014, 103, 184-190.


• Koster, L. J., Smits, C. P., ” Device model for the operation of polymer/fullerene bulk heterojunction solar cells” Rev. B, 2005, 110, 205-212.


• Mahmoudloo, A.,” Transient Trap-Limited Field Dependence charge carrier transport in organic semiconductors for time-of-flight configuration.” Journal of Optoelectronical Nanostructures, 2021,6, 87-95


• Nelson, J., Kwiatkowski, J. J.,” Modeling charge transport in organic photovoltaic materials.” Chem. Res., 2009, 42, 17-27.


• Mott, N. F.,” Conduction and Switching in Non-Crystalline Materials.”, Contemp. Phys., 1069, 10, 125-138.


• Li, J, Liu, J.,” Voltage-controlled optical bistability of a tunable three-level system in a quantum-dot molecule.”, Physica E, 2008, 41, 70– 73.


• Dignam, M. M,” Exciton states in coupled double quantum wells in static electric field”. physical review B, 1999, 43, 199- 206.


• Xin, X.,” Exiton in coupled quantum dots. ”Journal of Physics and Chemistry of Solids, 2003, 64, 98- 107.


• Chuang, S. L.,” optical Gain of Strained Wurtzite GaN Quantum-Well Lasers.” IEEE J.Quantum Electron, 2010, 33, 91- 99.