Single-photon upconversion in 6-pentaceneone crystal from bulk to ultrathin flakes†
Abstract
Phonon-assisted single-photon upconversion, which was not previously reported in organic materials, has been demonstrated in the 6-pentaceneone crystal through the linear pumping power dependent anti-Stokes photoluminescence (ASPL), nanoseconds PL lifetime and quenched ASPL at low temperature. Furthermore, the 6-pentaceneone crystal can be mechanically exfoliated to ultrathin flakes and it exhibits thickness-dependent photoluminescence.
- This article is part of the themed collections: Celebrating 60 years of the Fujian Institute of Research on the Structure of Matter and Singlet fission and photon upconversion