双空穴注入层对有机电致蓝光器件性能的改善

CuI/CuPc被采用作为有机电致蓝光CBP:BCzVBi器件 的双空穴注入层。采用双空穴注入层后使得CBP:BCzVBi蓝光器件的启亮电压降低至 3.4 V,较采用CuPc单空穴注入层的CBP:BCzVBi蓝光器件低0.4 V。在驱动电流20 mA/cm²的情况下,与单空穴注入层器件 相比,采用该双空穴注入层结构使得器件电流效率提升约19%,亮度 增加约17%,驱动电压降低0.9 V。采用Fowler -Nordheim (F-N)隧穿注入理论对器件空穴注入电流的影响因素进行了分析,发现双空穴 注入层形成的能级台阶可以有效地改善发光器件的空穴注入效率,进而起到改善器件发光电 流效率和降低驱动电压的目的。     

绿色硝化技术合成HMX的小试工艺研究

报道了以DADN（1，5－二乙酰基－3，7－二硝基－1，3，5，7－四氮杂环辛烷）为原料在新型硝化剂N2O5－NHO3溶液中合成HMX的方法，HMX的得率在96％以上，熔点272．0－272．8℃，此外，对影响HMX得率的几种因素作了初步分析。     

10,10’-二溴-9,9’-联蒽合成工艺改进

报道了一种有机电致发光材料中间体10,10’-二溴-9,9’-联蒽的合成工艺方法。结果表明,在乙酸乙酯和冰醋酸(体积比=1∶1)的混合溶剂中,以锌粒和浓盐酸为还原剂,蒽醌为原料,N-溴代丁二酰亚胺(NBS)为溴化剂,两步法反应合成10,10’-二溴-9,9’-联蒽,总产率达到72.3%。该法具有生产周期短、反应条件温和、纯化简单、成本低、产率高等优点。     

卡托普利中间体的制备工艺改进

使用磷酸氢二钾-氢氧化钾缓冲溶液作为缩合剂,对卡托普利关键中间体D-3-乙酰硫基-2-甲基丙酰-L-脯氨酸的制备工艺进行了改进。反应过程中,加入磷酸氢二钾至L-脯氨酸中,滴加氢氧化钾溶液作缩合剂,形成磷酸氢二钾-氢氧化钾缓冲溶液,然后与3-乙酰硫基-2-甲基丙酰氯缩合,制得标题产物。反应溶液的pH值很容易保持在7.5~8.5,反应平稳,操作简便,产品平均收率由33%提高到39.5%。     

三聚茚可控分步氧化制备三聚茚酮衍生物

报道了一种三聚茚通过可控氧化分步制备三聚茚酮衍生物的方法,采用的氧化剂体系是三氧化铬和冰乙酸.通过控制氧化剂的用量和反应温度,三聚茚以69％～ 78％的收率被分步氧化为三聚茚单酮、双酮或三酮.该方法步骤短、操作简单、产物易分离纯化,有望用于构建复杂的非C3对称型三聚茚基功能分子.     

Efficient blue fluorescence tandem organic light emitting device with a novel intermediate connector

A novel intermediate connector (IC) was formed which was composed of aluminum (Al, 3 nm)/1,4,5,8,9,11- hexaazatriphenylene-hexacarbonitrile (HAT-CN). The 3-nm-thick Al in the IC is certified to efficiently generate intrinsic charge carriers, and the HAT-CN is proved to work as the holes injection layer (HIL) for the corresponding electroluminescent (EL) unit simultaneously. This simply IC comprehensively takes advantage of the features of the HAT-CN so as to stack two single EL units without introducing extra material. In addition to a significant enhancement in luminance and current efficiency, a current efficiency (CE) of 10.2 cd/A and a luminance of 2 042 cd/m2 under the current density 20 mA/cm2 of this tandem organic light emitting device (TOLED) are yielded, which are notably almost the sum of that of the two single-unit devices.