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Citation: ZHAO Yun-Long, DUAN Lian, QIAO Juan, ZHANG De-Qiang, WANG Li-Duo, QIU Yong. Non-doped Single-Layer Red-Emitting Electrofluorescent Devices Based on an Ambipolar Small Molecule[J]. Acta Physico-Chimica Sinica, ;2010, 26(03): 531-534. doi: 10.3866/PKU.WHXB20100328 shu

Non-doped Single-Layer Red-Emitting Electrofluorescent Devices Based on an Ambipolar Small Molecule

1.
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China

Received Date: 16 December 2009
Available Online: 29 January 2010

Non-doped red-emitting electrofluorescent single-layer organic light-emitting devices based on an ambipolar small molecule, 4,9-bis(4-(2,2-diphenylvinyl)phenyl)naphtho[2,3-c][1,2,5] thiadiazole (BDPNTD), were studied. A WO3 or MoO3 buffer layer with an optimized thickness of 1 nm was used and the single-layer device has a low turn-on voltage (2.4 V) and a high luminance (4950 cd·m-2). The maximum emission wavelength was at about 636 nm and the CIE coordinates are at about (0.65, 0.35). We confirmed that the WO3 or MoO3 buffer layer can improve hole injection at the ITO/ BDPNTD interface and it creates a hole-electron balance in these devices.
- Organic light-emitting device,
- Single-layer,
- Non-doped,
- Red-emitting electrofluorescent,
- Ambipolar,
- ITO buffer layer
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