Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.5K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
2.5K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

11.3K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
11.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Within-Person variations in mindfulness mediate effects of daily stressors on psychological distress in adolescence.

Psychology & health·2021
Same author

Non-specific immune response of Nile tilapia, Oreochromis nilotica, to the extracellular products of Mycobacterium spp. and to various adjuvants.

Journal of fish diseases·2018
Same author

Project 2000: policy and possibilities.

Nursing standard (Royal College of Nursing (Great Britain) : 1987)·2016
Same author

The gelatinases, their activators and inhibitors in the progression of colorectal cancer.

Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland·2013
Same author

Rectal peptic ulceration.

Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland·2013
Same author

Early flexible sigmoidoscopy in the evaluation of acute left iliac fossa pain.

Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland·2013

Related Experiment Video

Updated: Apr 16, 2026

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
09:45

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers

Published on: October 28, 2015

9.0K

High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer

Baldo1, Thompson, Forrest

  • 1Center for Photonics and Optoelectronic Materials, Department of Electrical Engineering and the Princeton Materials Institute, Princeton University, New Jersey 08544, USA.

Nature
|February 29, 2000
PubMed
Summary

Researchers boosted organic light-emitting device efficiency by using a phosphorescent sensitizer to excite a fluorescent dye. This method overcomes the inherent 75% efficiency loss in fluorescence, achieving near-quadrupled performance in red emitters.

More Related Videos

Optical Control of Living Cells Electrical Activity by Conjugated Polymers
10:16

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Published on: January 28, 2016

8.0K
An In-House-Built and Light-Emitting-Diode-Based Photodynamic Therapy Device for Enhancing Verteporfin Cytotoxicity in a 2D Cell Culture Model
11:04

An In-House-Built and Light-Emitting-Diode-Based Photodynamic Therapy Device for Enhancing Verteporfin Cytotoxicity in a 2D Cell Culture Model

Published on: January 13, 2023

3.9K

Related Experiment Videos

Last Updated: Apr 16, 2026

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
09:45

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers

Published on: October 28, 2015

9.0K
Optical Control of Living Cells Electrical Activity by Conjugated Polymers
10:16

Optical Control of Living Cells Electrical Activity by Conjugated Polymers

Published on: January 28, 2016

8.0K
An In-House-Built and Light-Emitting-Diode-Based Photodynamic Therapy Device for Enhancing Verteporfin Cytotoxicity in a 2D Cell Culture Model
11:04

An In-House-Built and Light-Emitting-Diode-Based Photodynamic Therapy Device for Enhancing Verteporfin Cytotoxicity in a 2D Cell Culture Model

Published on: January 13, 2023

3.9K

Area of Science:

  • Organic electronics
  • Photophysics
  • Materials science

Background:

  • Maximum luminous efficiency in organic materials requires utilizing both spin-symmetric and anti-symmetric molecular excitations (excitons).
  • Phosphorescent organic light-emitting devices (OLEDs) achieve high efficiency by harnessing both types of excitons, but phosphorescence is rare at room temperature.
  • Fluorescence, a more common radiative process, is inherently less efficient (approx. 75% loss) due to spin-symmetry conservation.

Purpose of the Study:

  • To overcome the efficiency limitations of fluorescent organic light-emitting devices.
  • To develop a method for enhancing fluorescence efficiency by utilizing phosphorescence.
  • To demonstrate a practical application of this method in red OLEDs.

Main Methods:

  • Employing a phosphorescent sensitizer to excite a fluorescent dye.
  • Utilizing long-range, non-radiative energy transfer for energetic coupling between molecular species.
  • Investigating the internal efficiency of fluorescence post-excitation.

Main Results:

  • Achieved an internal fluorescence efficiency of up to 100%.
  • Successfully demonstrated a significant efficiency enhancement in a fluorescent red OLED.
  • Nearly quadrupled the efficiency of the tested fluorescent red organic light-emitting device.

Conclusions:

  • A phosphorescent sensitizer can effectively enhance the efficiency of fluorescent dyes.
  • Non-radiative energy transfer provides a viable mechanism for overcoming fluorescence efficiency limitations.
  • This approach offers a promising pathway for developing highly efficient fluorescent OLEDs.