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- W4377013594 abstract "Abstract We developed an efficient one-pot strategy for the facile synthesis of novel double boron–oxygen-fused polycyclic aromatic hydrocarbons (dBO-PAHs) with high regioselectivity and efficient skeletal editing. The BO-fused rings exhibit low aromaticity, endowing the dBO-PAHs with high chemical and thermal stabilities. The incorporation of the B–O units enables the dBO-PAHs to show single-component, low-temperature ultralong afterglow of up to 20 s after UV excitation. Moreover, the dBO-PAHs can also serve as ideal n -type host materials for high-brightness and high-efficiency deep-blue organic light-emitting diodes (OLEDs); compared to single host, BO1b :mCBP co-hosts-based deep-blue OLEDs exhibited dramatically brightness and efficiency enhancements with significantly reduced efficiency roll-offs; device 7 using PtON1 as emitter achieved a maximum brightness ( L max ) of 15722 cd/m 2 with a peak EQE of 27.1%, which represented the record-high L max among Pt(II)-based deep-blue OLEDs with CIE y < 0.20; device 9 employing PtON-TBBI as emitter demonstrated a 4.6-fold L max enhancement with a high color-purity (CIE y = 0.104), and also achieved a record-high EQE (28.0%) among Pt(II)-based deep-blue OLEDs. This work demonstrates the great potential of the dBO-PAHs as ultralong afterglow and novel n -type host materials in optoelectronic applications." @default.
- W4377013594 created "2023-05-19" @default.
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- W4377013594 date "2023-05-18" @default.
- W4377013594 modified "2023-09-29" @default.
- W4377013594 title "Double Boron–Oxygen-Fused Polycyclic Aromatic Hydrocarbons: Skeletal Editing and Applications in Organic Optoelectronic Materials" @default.
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- W4377013594 doi "https://doi.org/10.21203/rs.3.rs-2925773/v1" @default.
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