Aktywowana termicznie opóźniona fluorescencja (TADF) – jako rozwiązanie problemu niskich wydajności układów fluorescencyjnych OLED

Pander, P.

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Tytuł artykułu

Aktywowana termicznie opóźniona fluorescencja (TADF) – jako rozwiązanie problemu niskich wydajności układów fluorescencyjnych OLED

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Pander P.

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Warianty tytułu

Thermally activated delayed fluorescence – as a solution to the low yield problem of the fluorescent OLEDs

Języki publikacji

PL EN

Abstrakty

Rozwój technologii wyświetlania obrazu doprowadził do opracowania ekranów typu OLED, których użycie jest coraz powszechne. Współcześnie dąży się do poprawy kwantowej wydajności (EQE) OLED. Organiczne diody elektroluminescencyjne zawsze cierpiały z powodu ograniczonej wydajności kwantowej, co jest wywołane zdolnością wykorzystania zaledwie 25% stanów wzbudzonych. TADF, czyli aktywowana termicznie opóźniona fluorescencja, umożliwia użycie do 100% stanów wzbudzonych powstających w diodzie, a zatem zmniejszeniu ulega udział bezemisyjnej relaksacji cząsteczek. Zjawisko to występuje dla cząsteczek o małej całce nakładania HOMO i LUMO, co skutkuje małą przerwą energetyczną singlet-tryplet.

The development of display technology led to invention of OLED screens whose use is becoming more common nowadays. Today one of the goals is to improve OLED external quantum efficiency (EQE). Organic light-emitting diodes have always suffered from limited quantum efficiency due to harvesting of only 25% of excited states. TADF, which is thermally activated delayed fluorescence, allows to harvest up to 100% of excited states formed in the OLED, thus to decrease a contribution of the non-radiative relaxation. This phenomenon occurs for molecules possessing a small integral overlap of HOMO and LUMO, which results in a small singlet- triplet energy gap.

Słowa kluczowe

OLED TADF opóźniona fluorescencja

OLED TADF delayed fluorescence

Wydawca

Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego, ZW CHEMPRESS-SITPChem

Czasopismo

Chemik

Rocznik

2016

Tom

Vol. 70, nr 6

Strony

318--325

Opis fizyczny

Bibliogr. 34 poz., rys.

Twórcy

autor

Pander P.

piotr.pander@polsl.pl

Katedra Fizykochemii i Technologii Polimerów, Wydział Chemiczny, Politechnika Śląska, Gliwice

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.

Typ dokumentu

Bibliografia

Identyfikator YADDA

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