Photon upconversion based on sensitized triplet-triplet annihilation in bi-component systems is a multistep process that involves a triplet-triplet energy transfer (ET) from a donor to an acceptor moiety. This is aimed at sensitizing the population of annihilating optically dark triplets that generates the high energy photoluminescence. A large resonance between the involved triplets is usually recommended because it increases the energy gain between absorbed and emitted upconverted photons. However, it also enables efficient back-ET from acceptor to donor triplets, with potential detrimental consequences on the system performance. Here, we analyze a model system, where the energy difference between donor and acceptor triplets is lower than kBT at room temperature by means of time resolved and steady state photoluminescence spectroscopy, and develop a kinetic model, which describes the iterative loop that transfers the triplet exciton between the donor and acceptor molecules. In such a way, we obtained the guidelines for the optimization of the system composition required to overcome the back-ET effect and maximize the upconversion quantum yield.
Meroni, D., Monguzzi, A., & Meinardi, F. (2020). Photon upconversion in multicomponent systems: Role of back energy transfer. THE JOURNAL OF CHEMICAL PHYSICS, 153(11).
Citazione: | Meroni, D., Monguzzi, A., & Meinardi, F. (2020). Photon upconversion in multicomponent systems: Role of back energy transfer. THE JOURNAL OF CHEMICAL PHYSICS, 153(11). |
Tipo: | Articolo in rivista - Articolo scientifico |
Carattere della pubblicazione: | Scientifica |
Presenza di un coautore afferente ad Istituzioni straniere: | No |
Titolo: | Photon upconversion in multicomponent systems: Role of back energy transfer |
Autori: | Meroni, D; Monguzzi, A; Meinardi, F |
Autori: | |
Data di pubblicazione: | 2020 |
Lingua: | English |
Rivista: | THE JOURNAL OF CHEMICAL PHYSICS |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/5.0021253 |
Appare nelle tipologie: | 01 - Articolo su rivista |
File in questo prodotto:
File | Descrizione | Tipologia | Licenza | |
---|---|---|---|---|
[P67]_5.0021253.pdf | Publisher's version | Administrator Richiedi una copia |