光谱学与光谱分析 |
|
|
|
|
|
Phosphorescent Effect of Ir(ppy)3 on the Luminescent Characteristic of Rubrene |
XU Hong-hua1,2,XU Zheng1,ZHANG Fu-jun1,ZHAO Su-ling1,YUAN Guang-cai1,CHEN Yue-ning2 |
1. Institute of Optoelectronics Technology, Beijing Jiaotong University, Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing 100044, China 2. Department of Physics, Liaoning University, Sheyang 110036, China |
|
|
Abstract Many organic matters including heavy metal ions can validly utilize the singlet and triplet for luminescence owiog to the spin-orbit coupling. As a result, the internal quantum efficiency can easily achieve a value higher than traditional organic light emitting diodes in theory. There is a strong luminescence of PVK in PVK:PBD:Rubrene system. PL spectra excited by 345 nm of PVK:PBD:Rubrene thin film has a 410 nm PVK luminescent peak and a 560 nm Rubrene peak. EL still has a PVK luminescent peak, which should be kept from happening. Excitons can not adequately transferred from the matrix solution to Rubrene. The doping with Ir(ppy)3 improves the PVK:PBD:Rubrene system performance. PL spectra excited by 345 nm of PVK:PBD:Ir(ppy)3:Rubrene with low concentration of Rubrene has a 510 nm Ir(ppy)3 peak and a new 548 nm one. However, the Ir(ppy)3 peak is smaller and the Rubrene one is bigger in EL spectra. Notably a strong and single luminescence of Rubrene is obtained in EL and PL spectra excited by 345 nm of PVK:PBD:Ir(ppy)3:Rubrene with high concentration of Rubrene. Meanwhile, the Ir(ppy)3 luminescent peak disappears. The mechanism originates from the phosphorescent effect of Ir(ppy)3. The singlet excitons can basically be transferred from PVK:PBD or Ir(ppy)3 to Rubrene. But most excitons from Ir(ppy)3 can directly tunnel to the fluorescent material and come into being singlet states that can return to ground states and cause luminescence. Rubrene can accept proportional excitons with low concentration. While the concentration of Rubrene is higher, excitons can be entirely accepted by Rubrene. The effect also restricts the luminescent intensity of Ir(ppy)3 and boosts up that of Rubrene. Furthermore, the energy transfer in PVK:PBD:Ir(ppy)3:Rubrene system is primary the Forester energy transfer. Excitation spectra of Rubrene and emission spectra of Ir(ppy)3 have a large overlap revealing that there is a strong energy transfer and further confirmed the phosphorescent effect of Ir(ppy)3. The doping system with phosphorescence material and small molecules can enhance the brightness and internal quantum efficiency.
|
Received: 2007-02-02
Accepted: 2007-05-08
|
|
Corresponding Authors:
XU Hong-hua
E-mail: zhengxu@bjtu.edu.cn
|
|
[1] Baldo M A, O’Brien D F, Forrest S R,et a1. Nature, 1998, 395(10):151. [2] Baldo M A, Lamamsky S, Burrows P E, et a1. Appl. Phys. Lett., 1999, 75 (1):4. [3] Lee C L, Lee K B, Kim J J. Appl. Phys. Lett., 2000, 77: 2280. [4] Yang X H, Neher D. Appl. Phys. Lett., 2004, 84 (14): 2476. [5] Kanno B H, Russell J, Forrest S R, et al. Adv. Materials, 2006, 18(3):339. [6] Tokito S, Iijima T, Tsuzuki T, et al. Appl. Phys. Lett., 2003, 83(12):2456. [7] Jiang X, Wong F L, Fung M K, et al. Appl. Phys. Lett., 2003, 83(9): 1875. [8] Poon C O, Wong F L, Tong S W, et al. Appl. Phys. Lett., 2003, 83(5):1038. [9] Ikai M, Tokito S, Sakamoto Y, et al. Appl. Phys. Lett., 2001, 79: 156. [10] Gong X. Advan. Materials, 2002, 14:581. [11] Chen F C, Yang Y, Thompson M E, et al. Appl. Phys. Lett., 2002, 80(13):2308. [12] ZHANG Fu-jun, XU Zheng, HUANG Jin-zhao, et al(张福俊,徐 征,黄金昭, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2006, 26(8):1403. [13] ZHANG Fu-jun, XU Zheng, TENG Feng, et al(张福俊,徐 征, 滕 枫, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2006, 26(1):23. [14] Lamansky S, Djurovich P I, Feras A R, et al. J. Appl. Phys., 2002, 92:1570. [15] Gong X, Ostrowski J C, Bazzn G C, et al. Appl. Phys. Lett., 2002, 81:3711. [16] Lamansky S, Kwong R C, Nugent M, et al. Organic Electronics, 2001, 2:53. [17] Lane P A, Palilis L C, O’Brien D F, et al. Phys. Rev., 2001, B63:235206. [18] ZHANG Ting, XU Zheng, TENG Feng, et al(章 婷,徐 征, 滕 枫, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2006, 26(1):19. [19] Adachi C, Baldo M A, Forrest S R. Appl. Phys. Lett., 2000, 77:904. [20] Kanai H, Ichinosawa S, Sato Y. Synth. Met., 1997, 91:195. |
[1] |
YE Chang-qing, YU Xue, CHEN Shuo-ran, LIANG Zuo-qin, ZHOU Yu-yang, WANG Xiao-mei*. Study on the Structure/Energy-Level of Palladuim-Porphyrin Sensitizers on the Triplet-Triplet-Annihilation Upconversion Performance[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(01): 71-79. |
[2] |
WU Qi-xiao1, 2, ZHAO Su-ling1, 2*, XU Zheng1, 2, SONG Dan-dan1, 2, QIAO Bo1, 2, ZHANG Jun-jie1, 2, ZUO Peng-fei1, 2. Synthesis and Upconversion Mechanism of NaYF4∶Yb3+,Er3+ Nanocrystal Doped with Different Concentration of Sensitizer[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(05): 1406-1411. |
[3] |
DONG Wan, MENG Tao, CHEN Qiang* . Atomic Layer Deposited Aluminum Oxide on SnO2 Particles and Its Impact on Dye-Sensitized Solar Cells Performance[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(01): 172-174. |
[4] |
FU Shi-rong, SHI Meng*, HAN Pei-gao, ZHANG Bei-bei, YAN Ke-zhu. Solvent Effect of Europium(Ⅲ) Complex Sensitized by Charge Transfer Excited State of Functional Cation[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(09): 2502-2505. |
[5] |
ZHANG Qing-xia1, LONG Dan-dan1, ZHANG Fan2, QI Xiao-hua2, ZHANG Heng1, YAN Jing-hui1*, ZOU Ming-qiang2*. Influence of Bi3+ Doping on Properties of CaMoO4:Eu3+ Phosphors[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(07): 1758-1762. |
[6] |
LI Xu1, 2, GUAN Li1, LIU Chong3, YANG Zhi-ping1, 2, GUO Qing-lin1, 2* . Spectral Properties and Energy Transfer of Ce3+ and Tb3+ Ions Co-Doped Ca2SrAl2O6 Phosphor [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(06): 1535-1538. |
[7] |
LIU Ying1, 2, YANG Le1. Determination of Antibiotics Residues in the Raw Fresh Milk of Farms in the Miyun County of Beijing with Mg2+-Sensitized Metacycline Fluorescence Microscopic Imaging Technique [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(05): 1279-1284. |
[8] |
LI Lu, YU Jun-sheng*, CHEN Su-jie, JIANG Ya-dong. Fluorescence Spectra of Rubrene Dopant for Organic Light-Emitting Devices[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(11): 3066-3069. |
[9] |
SONG Dan-dan, ZHAO Su-ling*, XU Zheng, ZHANG Fu-jun, YUE Xin, ZHU Hai-na . Study on the Sensitizing Effect of fac-Tris(2-Phenylpyridinato-N, C2’) Iridium(Ⅲ) on Two Different Fluorescent Materials[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(10): 2626-2629. |
[10] |
SHEN Xiao-yan1,LIU Jing2,GUO Qi-cun2, DAI Kang2,SHEN Yi-fan2. Spectroscopic Investigation of Retrofluorescence in a Pure Optically Thick Rb Vapour Near the Surface [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(05): 1327-1330. |
[11] |
LI Yan-rui1,ZHAO Su-ling1*,YANG Shao-peng2,XU Zheng1,ZHANG Fu-jun1,SONG Dan-dan1,XU Xu-rong1. Properties of Energy Transfer in Two Host Materials Doped with Ir(ppy)3 and Rubrene[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(01): 1-5. |
[12] |
LI Jian-jun1,ZHANG Zu-ling1,QU Ling-bo1, 2,YANG Ran2. Determination of Pazufloxacin Mesylas by Terbium Sensitized Chemiluminescence Method[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(01): 73-77. |
[13] |
LIU Hong-li, HE Da-wei*, SHEN Fang. Spectral Properties and Energy Transfer of Ce3+ and Eu2+ Ions Co-Doped Ba2SiO4∶xCe3+,0.02Eu2+ Green Phosphor for White LEDs [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1790-1793. |
[14] |
ZHANG Xiang-hua,LIU Zheng-wei,XIAO Si-guo . Direct Sensitization Up-Conversion Mechanism from Yb3+ to Ho3+ and Tm3+ in Fluoride [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(05): 660-664. |
|
|
|
|