Effect of Crystallinity in Stretched PVA Films on Triplet–Triplet Annihilation Photon Upconversion
Source abstract
Abstract
A wet-stretching technique was applied to chromophore-blended poly(vinyl alcohol) (PVA) films to control the agglomeration of chromophores and improve the triplet–triplet annihilation (TTA) photon upconversion (UC) performance of the solid-state system. By using the stretching technique, a maximum UC quantum yield of ∼3% and lowest threshold intensity of 90 mW/cm2 were obtained under atmospheric conditions. It was found that a decrease in the crystallinity of the PVA matrix induced by stretching caused specific localization of the chromophores and accelerated triplet energy transfer and triplet exciton migration.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Luminescence and Fluorescent Materials · Luminescence Properties of Advanced Materials · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Industrial Technology Center of Wakayama Prefecture, Ogura 60, Wakayama, Wakayama 649-6261, Japan
IFMRI, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
Funding
National Institute of Advanced Industrial Science and Technology
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