Abstract
Shape-dependent electronic and optical properties of quantum dots (QD’s) have been simulated using the particle in a box concept and solving 3D Schrodinger equation by employing Quantum Dot Lab Software. Effect of the shape of equal sized QDs on its optical properties like absorption and its dependency on the incident angle of light and temperature of surroundings is largely unexplored. Isovolumic calculations of energy states of GaAs and InP QDs were carried out for different geometrical shapes. Out of various shapes considered, those with cylindrical shape were found to possess high energy eigenstates whereas cuboid shape associated themselves with the lowest energy eigenstates. However, with an increase in their volume, the value of corresponding energy eigenstates decreased in consonance with the other findings. Optical absorption properties of these systems were also studied as a function of temperature and incident angle of polarization in ‘temperature sweeping’ mode and ‘angle sweeping’ mode, respectively. The percentage increase in absorption was found to be largest for InP cuboid-shaped QDs. And also independent of any change in the incident angle. Our findings are very significant in increasing the efficiency of solar cells and improving the performance of optoelectronic devices such as lasers and photodetectors.
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Acknowledgements
Priya Rani thankfully acknowledges the funding received in the form of a University Research Scholarship. The authors are thankful to Quantum Dot Lab Software Team. The authors also acknowledge the Pt. Deendayal Upadhyaya Innovation and Incubation Centre (PDUIIC), Guru Jambheshwar University of Science and Technology, Hisar, India for providing necessary computational facilities under the RUSA 2.0 grant at Department of Physics, GJUS&T, Hisar.
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This study was funded by the Guru Jambheshwar University, Sch, Priya Rani, SC/ST/21/349- 357, Priya Rani.
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PR has been involved in simulations, data curation, and writing the original draft. Conceptualization, methodology, formal analysis, supervision, and project administration were looked after by SS. Writing—review and editing was carried out by RD and SS.
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Rani, P., Dalal, R. & Srivastava, S. Study of electronic and optical properties of quantum dots. Appl Nanosci 12, 2127–2138 (2022). https://doi.org/10.1007/s13204-022-02485-8
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DOI: https://doi.org/10.1007/s13204-022-02485-8