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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Related Experiment Video

Updated: May 9, 2026

Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
11:06

Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices

Published on: July 8, 2016

Folded-light-path colloidal quantum dot solar cells.

Ghada I Koleilat1, Illan J Kramer, Chris T O Wong

  • 1Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada.

Scientific Reports
|July 10, 2013
PubMed
Summary
This summary is machine-generated.

Colloidal quantum dot solar cells can now achieve higher efficiencies by folding light paths within the quantum dot film. This innovation overcomes the trade-off between light absorption and charge extraction, improving solar energy conversion.

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Related Experiment Videos

Last Updated: May 9, 2026

Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
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Published on: July 8, 2016

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A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
09:58

A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

Published on: May 10, 2018

Area of Science:

  • Materials Science
  • Renewable Energy
  • Nanotechnology

Background:

  • Colloidal quantum dot (CQD) photovoltaics offer low-cost processing and tunable absorption for solar energy.
  • Current CQD solar cell efficiencies exceed 7%, but are limited by film thickness trade-offs.
  • Thicker films enhance photon absorption but hinder efficient charge extraction.

Purpose of the Study:

  • To develop a novel architecture for CQD photovoltaics that overcomes the film thickness compromise.
  • To improve short-circuit current and overall power conversion efficiency in CQD solar cells.

Main Methods:

  • Implemented a light-folding architecture within the CQD solid.
  • Engineered the path of light propagation to enhance absorption and carrier extraction.

Main Results:

  • Achieved a significant increase in short-circuit current.
  • Demonstrated improved power conversion efficiency in CQD solar cells.

Conclusions:

  • The novel light-folding architecture effectively resolves the thickness-dependent compromise in CQD photovoltaics.
  • This approach offers a promising pathway for advancing CQD solar cell performance.