Engineering of interface exciplex system for highly efficient white organic light-emitting diodes based on single-emission-layer architecture

Sheng, Ren; Zhang, Erdong; Zhao, Wencheng; Chen, Cong; Ma, Wenjie; Shao, Jianhua; Duan, Yu; Zhao, Yi; Chen, Ping

doi:10.1016/j.orgel.2021.106382

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…The formation of exciplex could be demonstrated by the red-shift PL spectrum of mixed film compared with those of constituting molecules and TADF characteristics in transient PL decayed curves in Figure S1 [30]. The exciplex of 26DCzPPy: B4PyPPM possesses a minor ∆E ST of 35 meV and an efficient RISC process, which are beneficial for preparing efficient OLEDs [31]. Figure 3a,b show the current efficiency (CE) and PE curves of four devices.…”

Section: Resultsmentioning

confidence: 94%

Management of Exciton Distribution for High-Performance Organic Light-Emitting Diodes Based on Interfacial Exciplex Architecture

Sheng,

Chen,

Zhang

et al. 2023

Molecules

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Interfacial exciplex has recently been adopted as an effective host to achieve phosphorescent organic light-emitting diodes (OLEDs) with high efficiencies and low driving voltages. However, a systematic understanding of exciton recombination behavior in either host of interfacial exciplex is still deficient. Herein, the strategic design rule of interfacial exciplex host is proposed to overcome the negative effects of direct trapping recombination by systematically investigating exciton recombination behavior in interfacial exciplex hosts. As a result, blue and orange phosphorescent devices acquire peak external quantum efficiencies of 23.5% and 29.2% with low turn-on voltages. These results provide a simple method to realize highly efficient OLEDs aiming for general lighting and display applications.

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Section: Resultsmentioning

confidence: 94%

Management of Exciton Distribution for High-Performance Organic Light-Emitting Diodes Based on Interfacial Exciplex Architecture

Sheng,

Chen,

Zhang

et al. 2023

Molecules

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“…Recently, our group developed highly efficient phosphorescence WOLEDs by codoping a complementary emitter into an acceptor of 4,6-bis(3,5-di(pyridin-4-yl)phenyl)-2-phenylpyrimidine (B4PyPPM) (shown in Figure 12a) [123]. A novel interfacial exciplex system 26DCzPPy/B4PyPPM was used to build white OLEDs based on the single-emissionlayer structure, achieving efficiencies of 101.9 lm/W and 81.1 cd/A, along with a low turn-on voltage of 2.4 V, which is one of the best values in WOLEDs based on simplified architecture, as shown in Figure 12b.…”

Section: Doped Woledsmentioning

confidence: 99%

Recent Advances of Interface Exciplex in Organic Light-Emitting Diodes

et al. 2022

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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.

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Achieving slow efficiency roll-off and tunable spectrum in high-performance tandem WOLEDs with mixed hosts

He,

Wang,

Wei

et al. 2024

Journal of Luminescence

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Engineering of interface exciplex system for highly efficient white organic light-emitting diodes based on single-emission-layer architecture

Cited by 4 publications

References 32 publications

Management of Exciton Distribution for High-Performance Organic Light-Emitting Diodes Based on Interfacial Exciplex Architecture

Management of Exciton Distribution for High-Performance Organic Light-Emitting Diodes Based on Interfacial Exciplex Architecture

Recent Advances of Interface Exciplex in Organic Light-Emitting Diodes

Achieving slow efficiency roll-off and tunable spectrum in high-performance tandem WOLEDs with mixed hosts

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