发光学报, 2012, 33 (4): 408, 网络出版: 2012-04-16  

柠檬酸钾电子注入层对有机电致发光器件的影响

Effect of Potassium Citrate as Electron Injection Material on Organic Light Emitting Diodes
作者单位
北京交通大学发光与光信息教育部重点实验室 光电子技术研究所, 北京 100044
摘要
使用柠檬酸钾(C6H5K3O7)作为电子注入材料,制备了多层有机电致发光器件。当柠檬酸钾阴极修饰层厚度为0.5 nm时,得到3.6 cd/A 的发光效率,高于0.5 nm LiF作阴极修饰层时的发光效率(2.5 cd/A) 。器件的开启电压相比0.5 nm LiF作阴极修饰的器件降低了0.5 V。实验结果表明,柠檬酸钾(C6H5K3O7)是一种良好的电子注入材料。
Abstract
The multilayer organic light-emitting diodes (OLEDs) using potassium citrate (C6H5K3O7) as the electron-injection material have been fabricated. The electroluminescence (EL) efficiency of 3.6 cd/A was obtained by inserting 0.5-nm-thick C6H5K3O7 as electron injecting layer, which is higher than that of 2.5 cd/A in reference device with 0.5-nm-thick LiF. The turn-on voltage was decreased 0.5 V compared with the reference device with 0.5-nm-thick LiF. The results demonstrated that C6H5K3O7 is a promising electron injection material.
参考文献

[1] Tang C W, VanSlyke S A. Organic electroluminescent diodes [J]. Appl. Phys. Lett., 1987, 51(12):913-915.

[2] Haskal E I, Curioni A, Seidler P F, et al. Lithium-aluminum contacts for organic light-emitting devices [J]. Appl. Phys. Lett., 1997, 71(9):1151-1153.

[3] Li F, Tang H, Anderegg J, et al. Fabrication and electroluminescence of double-layered organic light-emitting diodes with the Al2O3/Al cathode [J]. Appl. Phys. Lett., 1997, 70(10):1233-1235.

[4] Mei YOKOYAMA, Wu Chungming, Su Shuihsiang. Enhancing the efficiency of white organic light-emitting diode using energy recyclable photovoltaic cells [J]. Chin. J. Lumin.(发光学报), 2012, 33(1):1-6 (in English).

[5] Kido J, Matsumoto T. Bright organic electroluminescent devices having a metal-doped electron-injecting layer [J]. Appl. Phys. Lett., 1998, 73(20):2866-2868.

[6] Lee J H, Wu M H, Chao C C, et al. High efficiency and long lifetime OLED based on a metal-doped electron transport layer [J]. Chem. Phys. Lett., 2005, 416(4-6):234-237.

[7] Park Y, Choong V, Ettedgui E, et al. Energy level bending and alignment at the interface between Ca and a phenylene vinylene oligomer [J]. Appl. Phys. Lett., 1996, 69(8):1080-1082.

[8] Kawakami S, Kitagawa M, Kusano H, et al. Dependence of electroluminescent properties on cathode metalsin PVCz double-layered organic EL devices [J]. Thin Solid Films, 2000, 363(1-2):17-20.

[9] Hung L S, Tang C W, Mason M G. Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode [J]. Appl. Phys. Lett., 1997, 70(2):152-154.

[10] Kang S J, Park D S, Kim S Y, et al. Enhancing the electroluminescent properties of organic light-emitting devices using a thin NaCl layer [J]. Appl. Phys. Lett., 2002, 81(14):2581-2583.

[11] Schmitz C, Schmidt H W, Thelakkat M. Lithium-quinolate complexes as emitter and interface materials in organic light-emitting diodes [J]. Chem. Mater., 2000, 12(10):3012-3019.

[12] Zhan Y Q, Xiong Z H, Shi H Z, et al. Sodium stearate, an effective amphiphilic molecule buffer material between organic and metal layers in organic light-emitting devices [J]. Appl. Phys. Lett., 2003, 83(8):1656-1658.

[13] Kang, H S, Park K N, Cho Y R, et al. Enhanced performance of organic electroluminescence diodes with a 2-TNATA∶C60 hole injection layer [J]. J. Ind. Eng. Chem., 2009, 15(5):752-757.

[14] Park K N, Kang H S, Senthlikumar N, et al. Enhanced efficiency of organic electroluminescence diode using PEDOT-PSS/NPD-C60 hole injection/transport layers [J]. Polymer-Korea, 2009, 33(5):407-412.

[15] Yun C H, Cho H, Kang H. Electron injection via pentacene thin films for efficient inverted organic light-emitting diodes [J]. Appl. Phys. Lett., 2009, 95(5):053301-1-3.

[16] Xie K, Qiao J, Duan L, et al. Organic cesium salt as an efficient electron injection material for organic light-emitting diodes [J]. Appl. Phys. Lett., 2008, 93(18):183302-1-3.

[17] Wu C I, Lin C T, Chen Y H, et al. Electronic structures and electron-injection mechanisms of cesium-carbonate-incorporated cathode structures for organic light-emitting devices [J]. Appl. Phys. Lett., 2006, 88(15):152104-1-3.

[18] Gassmann A, Melzer C, Seggen H V, et al. The Li3PO4/Al bilayer: An efficient cathode for organic light emitting devices [J]. J. Appl. Phys., 2009, 105(12):083513-1-6.

[19] Li Y, Zhang D Q, Duan L, et al. Elucidation of the electron injection mechanism of evaporated cesium carbonate cathode interlayer for organic light-emitting diodes [J]. Appl. Phys. Lett., 2007, 90(1):012119-1-3.

[20] Choudhury K R, Yoon J H, So F. LiF as an n-dopant in tris(8-hydroxyquinoline) aluminum thin films [J]. Adv. Mater., 2008, 20(8):1456-1461.

[21] Lee D H, Park J H, Chae H, et al. Enhanced carrier balance by organic salt doping in single-layer polymer light-emitting devices [J]. Organic Electronics, 2009, 10(7):1345-1351

赵建伟, 高靖欣, 李佳. 柠檬酸钾电子注入层对有机电致发光器件的影响[J]. 发光学报, 2012, 33(4): 408. ZHAO Jian-wei, GAO Jing-xin, LI Jia. Effect of Potassium Citrate as Electron Injection Material on Organic Light Emitting Diodes[J]. Chinese Journal of Luminescence, 2012, 33(4): 408.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!