Recent progress on exciplex-emitting OLEDs

Kim, Hwang-Beom; Kim, Jang‐Joo

doi:10.1080/15980316.2019.1650838

Cited by 36 publications

(15 citation statements)

References 94 publications

(139 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…D-A based bimolecular exciplex systems with intermolecular CT interaction have already been developed as a main kind of TADF-emitting system, after the pioneering work of Adachi et al [61]. Such systems have superiority in flexible D-A combination and energy level modulation [62,63]. The accurate regulation of D-A interaction, however, is dependent on not only the electronic inductive effects of the D and A molecules but also the D-A distance determined by the steric hindrances of the two components.…”

Section: Po Tadf-emitting Exciplexesmentioning

confidence: 99%

Pure-organic phosphine oxide luminescent materials

Song

2020

Journal of Information Display

View full text Add to dashboard Cite

Phosphine-oxide-(PO)-based optoelectronic materials are attracting increasing attention owing to the unique advantages of P = O groups in modulating the molecular configuration, excited-state properties, and intermolecular interactions. P = O groups are also effective for the molecular design of high-performance luminescent materials. In this review, the research progress of pure-organic PO materials for light-emitting applications with high radiation is summarized. After a brief introduction about the luminescent mechanisms and the functions of P = O groups, this review focuses on the material design and structural-property relationships, especially the influences of P = O groups on the material performances, which are divided into three chapters according to the mechanisms of fluorescent (FL), thermally active delayed fluorescent (TADF), and charge-transfer-(CT)-based longafterglow materials. It was shown that the electron-withdrawing effect and the insulating character of the P = O joint could improve the electrical properties and enhance inter-and intramolecular CT without remarkably changing the emission color, making it almost 'ideal' for blue emitters. The steric hindrance of 3D PO molecules further suppressed the quenching effects for emission efficiency improvement. These superiorities guarantee that the pure-organic PO system is one of the best fluorescent materials for diverse applications.

show abstract

Section: Po Tadf-emitting Exciplexesmentioning

confidence: 99%

Pure-organic phosphine oxide luminescent materials

Song

2020

Journal of Information Display

View full text Add to dashboard Cite

show abstract

“…In 2012, thermally activated delayed fluorescence (TADF) materials were first reported by the Adachi group, and are regarded as new generation emitters by academia and industry [12,13]. Such materials have a small singlet-triplet energy gap (∆E ST ), so that triplet excitons can be upconverted into singlet excitons via reverse intersystem crossing (RISC) at room temperature, thereby generating delayed fluorescence [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Interface Exciplex in Organic Light-Emitting Diodes

et al. 2022

View full text Add to dashboard Cite

The interface exciplex system is a promising technology for reaching organic light-emitting diodes (OLEDs) with low turn-on voltages, high efficiencies and long lifetimes due to its unique virtue of barrier-free charge transport, well-confined recombination region, and thermally activated delayed fluorescence characteristics. In this review, we firstly illustrate the mechanism frameworks and superiorities of the interface exciplex system. We then summarize the primary applications of interface exciplex systems fabricated by doping and doping-free technologies. The operation mechanisms of these OLEDs are emphasized briefly. In addition, various novel strategies for further improving the performances of interface exciplex-based devices are demonstrated. We believe this review will give a promising perspective and attract researchers to further develop this technology in the future.

show abstract

“…Triplet–triplet annihilation (TTA) was proposed as another mechanism for the triplet harvesting process in TTA-dominant exciplex-emitting OLEDs. ( Jankus et al, 2013 ; Kim and Kim, 2019 ). Furthermore, inspired by exciplex-based OLEDs, the novel concept of long-persistent luminescence has been confirmed by Adachi and co-workers.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Structure and Energy Transfer Process of Undoped Ultrathin Emitting Nanolayers Within Interface Exciplexes

Wang

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

Organic light-emitting diodes (OLEDs) have great potential for display, lighting, and near-infrared (NIR) applications due to their outstanding advantages such as high efficiency, low power consumption, and flexibility. Recently, it has been found that the ultrathin emitting nanolayer technology plays a key role in OLEDs with simplified structures through the undoped fabricated process, and exciplex-forming hosts can enhance the efficiency and stability of OLEDs. However, the elementary structure and mechanism of the energy transfer process of ultrathin emitting nanolayers within interface exciplexes are still unclear. Therefore, it is imminently needed to explore the origin of ultrathin emitting nanolayers and their energy process within exciplexes. Herein, the mechanism of films growing to set ultrathin emitting nanolayers (<1 nm) and their energy transfer process within interface exciplexes are reviewed and researched. The UEML phosphorescence dye plays a key role in determining the lifetime of excitons between exciplex and non-exciplex interfaces. The exciplex between TCTA and Bphen has longer lifetime decay than the non-exciplex between TCTA and TAPC, facilitating exciton harvesting. The findings will be beneficial not only to the further development of OLEDs but also to other related organic optoelectronic technologies.

show abstract

Recent progress on exciplex-emitting OLEDs

Cited by 36 publications

References 94 publications

Pure-organic phosphine oxide luminescent materials

Pure-organic phosphine oxide luminescent materials

Recent Advances of Interface Exciplex in Organic Light-Emitting Diodes

Understanding the Structure and Energy Transfer Process of Undoped Ultrathin Emitting Nanolayers Within Interface Exciplexes

Contact Info

Product

Resources

About