Efficient non-doped pure blue organic light-emitting diodes based on an asymmetric phenylenevinylene with cis

详细信息    查看全文

• 作者：Yang Liu ; Xutang Tao ; Fuzhi Wang ; Xiangnan Dang ; Dechun Zou ; Yan Ren ; Minhua Jiang
• 关键词：Organic light-emitting diodes ; cis-phenylenevinylene ; Structure ; Pure blue ; Non-doped
• 刊名：Organic Electronics
• 出版年：2008
• 出版时间：October 2008
• 年：2008
• 卷：9
• 期：5
• 页码：609-616
• 全文大小：980 K

文摘

We reported an asymmetric phenylenevinylene with a cis double bond 2-(4-(p-tolyl)styryl)-1,4-dip-tolylbenzene (cis-TSDTB) and its use as efficient deep-blue emitter for organic light-emitting diodes (OLEDs) applications. The crystal structure of cis-TSDTB showed torsion configuration and asymmetric geometry, which make it packing in a reduced intermolecular interaction arrangement. And its single crystals showed excellent fluorescence owing to this unique molecular configuration. Typical OLEDs using cis-TSDTB as non-doped emitters exhibited saturated blue light with the CIE 1931 coordinates of (0.15, 0.10), which is quite close to the National Television Standards Committee (NTSC) blue standard. High luminescence efficiency (3.4 cd A⁻¹) and high brightness (9855 cd m⁻²) have been realized in the device. All of these outstanding results indicated that cis-phenylenevinylene will be a promising candidate as blue light-emitting materials.