Published May 26, 2014 | Version v1
Journal article Metadata-only

Temperature dependence of photoluminescence properties in a thermally activated delayed fluorescence emitter

Creators

  • 1. Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai 599-8531 (Japan)
  • 2. The Research Institute for Molecular Electronic Devices, Osaka Prefecture University, Sakai 599-8531 (Japan)
  • 3. International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)
  • 4. Center for Organic Photonics and Electronics Research, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)

Description

Using steady-state and time-resolved photoluminescence (PL) spectroscopy, we have investigated the temperature dependence of PL properties of 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyano-benzene (4CzIPN), which have a small energy gap between its singlet and triplet excited states and thus exhibits efficient thermally activated delayed fluorescence [H. Uoyama et al., Nature 492, 235 (2012)]. Below around 100 K, PL quantum efficiency of 4CzIPN thin films is largely suppressed and strong photoexcitation intensity dependence appears. These features can be explained by using rate equations for the densities of singlet and triplet excited states considering a triplet-triplet annihilation process.

Additional details

Identifiers

DOI
10.1063/1.4878397;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
104
Journal Issue
21
Journal Page Range
p. 213303-213303.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46006327
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ANNIHILATION; BENZENE; ENERGY GAP; EXCITED STATES; FLUORESCENCE; PHOTOLUMINESCENCE; QUANTUM EFFICIENCY; SPECTROSCOPY; STEADY-STATE CONDITIONS; TEMPERATURE DEPENDENCE; THIN FILMS; TIME RESOLUTION
Descriptors DEC
AROMATICS; EFFICIENCY; EMISSION; ENERGY LEVELS; FILMS; HYDROCARBONS; INTERACTIONS; LUMINESCENCE; ORGANIC COMPOUNDS; PARTICLE INTERACTIONS; PHOTON EMISSION; RESOLUTION; TIMING PROPERTIES

Optional Information

Notes
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