Recent Advances in d‐f Transition Lanthanide Complexes for Organic Light‐Emitting Diodes: Insights Into Structure–Luminescence Relationships DOI
Jinghong Li, Yanbo Zhao, Donghong Yu

и другие.

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Апрель 26, 2025

Abstract Recently, d ‐ f transition lanthanide complexes have emerged as promising emitters with high exciton utilization efficiency (EUE) and short excited state lifetime simultaneously, demonstrating potential applications in organic light‐emitting diodes (OLEDs). First, the is parity‐allowed, resulting excited‐state lifetimes of nanosecond (ns) scale. Second, 5 orbitals are sensitive to ligand‐field environments, their splitting can be finely tuned by ligand field, enabling precise control emission colors. Third, spin‐allowed single‐electron transitions, such those open‐shell Ce(III) Eu(II) complexes, help address limitations arising from singlet triplet excitons. To date, Ce(III)‐based blue OLEDs achieved external quantum efficiencies (EQEs) exceeding 20% brightness levels over 30 000 cd m −2 . However, based on still face significant challenges, including color tunablility, photoluminescence yields (PLQYs), stability. This review first provides an introduction luminescent materials. Next, overview ligands used presented, covering four distinct types. Finally, in‐depth discussion explores relationship between structures, (PL) electroluminescence (EL) performance.

Язык: Английский

Recent Advances in d‐f Transition Lanthanide Complexes for Organic Light‐Emitting Diodes: Insights Into Structure–Luminescence Relationships DOI
Jinghong Li, Yanbo Zhao, Donghong Yu

и другие.

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Апрель 26, 2025

Abstract Recently, d ‐ f transition lanthanide complexes have emerged as promising emitters with high exciton utilization efficiency (EUE) and short excited state lifetime simultaneously, demonstrating potential applications in organic light‐emitting diodes (OLEDs). First, the is parity‐allowed, resulting excited‐state lifetimes of nanosecond (ns) scale. Second, 5 orbitals are sensitive to ligand‐field environments, their splitting can be finely tuned by ligand field, enabling precise control emission colors. Third, spin‐allowed single‐electron transitions, such those open‐shell Ce(III) Eu(II) complexes, help address limitations arising from singlet triplet excitons. To date, Ce(III)‐based blue OLEDs achieved external quantum efficiencies (EQEs) exceeding 20% brightness levels over 30 000 cd m −2 . However, based on still face significant challenges, including color tunablility, photoluminescence yields (PLQYs), stability. This review first provides an introduction luminescent materials. Next, overview ligands used presented, covering four distinct types. Finally, in‐depth discussion explores relationship between structures, (PL) electroluminescence (EL) performance.

Язык: Английский

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