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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...
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
Wood Products01:21

Wood Products

Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...

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Synthesis of Persistent Luminescent Nanoparticles for Rewritable Displays and Illumination Applications
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Published on: September 13, 2024

Luminescent Transparent Wood for Diffusive White Light Generation.

Francesco Bolognesi1,2, Seyed Ehsan Hadi1, Vivek Richards Pakkam Gabriel1

  • 1Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm 10044, Sweden.

ACS Applied Optical Materials
|July 1, 2026
PubMed
Summary
This summary is machine-generated.

Researchers created a single-layer transparent wood composite using green and red quantum dots (QDs) to produce white light. This sustainable material offers excellent mechanical strength and uniform, glare-free illumination.

Keywords:
diffusive white lightphotoluminescencequantum dotsquantum yieldtransparent wood

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Conventional white light generation often involves complex multilayer systems or multiple emitters.
  • Quantum dots (QDs) offer tunable light emission but integrating them into robust platforms remains a challenge.

Purpose of the Study:

  • To develop a novel, single-layer transparent wood (TW) composite for efficient white light generation.
  • To explore the use of green and red Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) quantum dots (QDs) within a TW matrix.
  • To evaluate the optical and mechanical properties of the QD-TW composite.

Main Methods:

  • A simple codispersion strategy was employed to incorporate multiple QDs into a single TW layer.
  • Blue light-emitting diode (LED) excitation was used to activate the QD-TW composite.
  • Optical transmittance, haze, and quantum yield were measured for the 0.6 mm thick composite.

Main Results:

  • Homogeneous white light was successfully generated through the combined emission of green and red QDs and light scattering by the TW.
  • The QD-TW composite exhibited high optical transmittance and strong haze.
  • The material demonstrated excellent mechanical properties, with a measured quantum yield of 42%.

Conclusions:

  • Transparent wood serves as a sustainable and mechanically robust platform for multicolor emitters.
  • The single-layer QD-TW composite offers a simplified approach to producing glare-free, uniform white light.
  • This technology has potential applications in advanced lighting solutions.