NBPhen, full name 2,9-Dinaphthalen-2-yl-4,7-diphenyl-1,10-phenanthroline, is one of the close relatives of Bphen, which is used in OLEDs and photovoltaic devices as an electron-injection layer or hole-blocking layer material. Due to its low evaporation temperature and air stability, caesium azide (CsN3) doped NBphen has also been demonstrated as an efficient electron-injection layer (EIL) capable of replacing lithium fluoride (LiF) in such devices.
OLEDs utilising CsN3 -doped NBphen as EIL exhibit significantly improved current density-luminance-voltage characteristics.
Highly Effcient Organic Light-Emitting Diode Using A Low Refractive Index Electron Transport Layer, A. Salehi et al., Adv. Optical Mater., 170019 (2017); DOI: 10.1002/adom.201700197.
Predicting Operational Stability for Organic Light-Emitting Diodes with Exciplex Cohosts, Z, Wang et al., Adv. Sci., 6, 1802246 (2019); DOI: 10.1002/advs.201802246.
The utilization of low-temperature evaporable CsN3-doped NBphen as an alternative and efficient electron-injection layer in OLED, X. Chu et al., Phys. Status Solidi A 211, 7, 1605–1609 (2014); DOI: 10.1002/pssa.201431090.
Utilizing a Spiro TADF Moiety as a Functional Electron Donor in TADF Molecular Design toward Efficient “Multichannel” Reverse Intersystem Crossing, L. Gan et al., Adv. Funct. Mater., 29, 1808088 (2019); DOI: 10.1002/adfm.201808088.
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