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Related Concept Videos

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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Measuring how one directional quantity affects another along a specific path involves comparing their orientation and strength. When two such quantities are represented using direction and amount, a numerical result is computed to show how much one acts along the path of the other. This result comes from a rule combining both inputs' horizontal and vertical parts and adding the results.This calculation gives a single value that grows larger when both inputs point in similar directions and...
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Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications
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Stokes-Shift-Engineered Indium Phosphide Quantum Dots for Efficient Luminescent Solar Concentrators.

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  • 1Department of Engineering and Natural Sciences , Sabanci University , Istanbul 34956 , Turkey.

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|March 29, 2018
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Summary

Cadmium-free quantum dots improve luminescent solar concentrators (LSCs) by reducing reabsorption losses. These eco-friendly LSCs offer promising potential for transparent and flexible solar window applications.

Keywords:
Stokes shiftband alignmentindium phosphide (InP)luminescent solar concentratorquantum dotsreabsorptionsolar celltype-II

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Luminescent solar concentrators (LSCs) offer potential for cost-effective, large-area energy harvesting.
  • Reabsorption losses in quantum dots (QDs) limit LSC efficiency.
  • Heavy metal toxicity in traditional QDs raises environmental concerns.

Purpose of the Study:

  • To develop environmentally sustainable LSCs using cadmium-free quantum dots.
  • To suppress reabsorption losses through Stokes shift engineering in InP/ZnO QDs.
  • To evaluate the optical performance and potential of these novel LSCs for solar windows.

Main Methods:

  • Fabrication of luminescent solar concentrators (LSCs) utilizing cadmium-free Indium Phosphide/Zinc Oxide (InP/ZnO) core/shell quantum dots (QDs).
  • Engineering the Stokes shift via ZnO shell growth on InP cores to control spectral overlap and minimize reabsorption.
  • Analysis of optical performance, including optical efficiency and photostability of the QDs within the host matrix.

Main Results:

  • Successfully suppressed reabsorption losses in LSCs by employing InP/ZnO core/shell QDs with type-II band alignment.
  • Achieved an optical efficiency of 1.45% for the indium-based LSCs.
  • Demonstrated enhanced photostability of the QDs due to the ZnO shell.

Conclusions:

  • Cadmium-free InP/ZnO QDs enable efficient and sustainable luminescent solar concentrators.
  • Stokes shift engineering effectively mitigates reabsorption losses, enhancing LSC performance.
  • The developed LSCs exhibit transparency, flexibility, and eco-friendly characteristics, making them suitable for solar window applications.