Citation: XUE Kai, YAN Minnan, PAN Fei, TIAN Mengying, PAN Xudong, ZHANG Hongmei. Single-Layer Organic Light-Emitting Devices with C₆₀ and MoO₃ Mixed Materials as Hole Injection Layer[J]. Acta Physico-Chimica Sinica, ;2019, 35(8): 896-902. doi: 10.3866/PKU.WHXB201810064 shu

Single-Layer Organic Light-Emitting Devices with C₆₀ and MoO₃ Mixed Materials as Hole Injection Layer

Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts & Telecommunications, Nanjing 210023, P. R. China

Corresponding author: ZHANG Hongmei, iamhmzhang@njupt.edu.cn
Received Date: 30 October 2018
Revised Date: 10 December 2018
Accepted Date: 11 December 2018
Available Online: 14 August 2018
Fund Project: The project was supported by the National Natural Science Foundation of China (61674081, 51333007)the National Natural Science Foundation of China 61674081the National Natural Science Foundation of China 51333007

Multilayer phosphorescent organic lighting-emitting diodes (PHOLEDs) with complicated device configurations have greatly increased the complexity of manufacturing and the fabrication cost. Therefore, there is strong incentive to develop simplified OLEDs, such as a single-layer device that has the structure of anode/hole injection layer (HIL)/emissive layer/electron injection layer/cathode. However, because of the absence of a carrier transport layer, the single-layer device suffers from severe charge injection difficulties and unbalanced carrier transport. Hence, the performances of single-layer devices reported so far have not been satisfactory. It has been proved that the modification of the electrode/organic interface could influence carrier injection to improve the device performance in multilayer PHOLEDs. Modification of the electrode/organic interface is more essential for achieving high-performance single-layer OLEDs. In this work, efficient green phosphorescent single-layer OLEDs based on the structure of indium tin oxide (ITO)/C₆₀ (1.2 nm):MoO₃ (0.4 nm)/1, 3, 5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene (TPBi):fac-tris(2-phenylpyridine)iridium [Ir(ppy)₃]/LiF (0.7 nm)/Al (120 nm) were fabricated. C₆₀, MoO₃, and C₆₀:MoO₃ were applied as the HILs, respectively, for comparison. The layer of TPBi played a dual role of host and electron-transporting material within the emission layer. Thus, the properties of the HILs play an important role in the adjustment of electron/hole injection to attain transport balance of the charge carriers in single-layer OLEDs with electron-transporting hosts. It is found that appropriate adjustment of the HIL is a key factor to achieve high-efficiency single-layer OLEDs. The large affinity of MoO₃ (6.37 eV), inducing electron transfer from the highest occupied molecular orbital of C₆₀ to MoO₃, results in the formation of C₆₀ cations and induces the decrease of the valence from Mo⁺⁶ to Mo⁺⁵; therefore, C₆₀:MoO₃ can adjust the hole injection properties well. Finally, a single-layer OLED with a maximum current efficiency of 35.88 cd∙A⁻¹ was achieved. Compared with devices with MoO₃ (28.99 cd∙A⁻¹) or C₆₀ (10.46 cd∙A⁻¹) as HILs, the device performance was improved by 24% and 243%, respectively. Overall, a novel and effective method of using different mixed ratios of C₆₀ and MoO₃ as the HIL to realize effective charge carrier regulation is proposed, and it is of great significance for fabricating high-performance single-layer OLEDs.
- Single-layer,
- Organic light-emitting diodes,
- Hole injection layer,
- Mixed materials,
- Balance of charge carriers
1. [1]
  Liu, Z. W.; Helander, M. G.; Wang, Z. B.; Lu, Z. H. Org. Electron. 2009, 10, 1146. doi:10.1016/j.orgel.2009.06.002 doi: 10.1016/j.orgel.2009.06.002
2. [2]
  Yin, Y. M.; Wen, X. M.; Yu, J.; Zhang, L.T.; Xie, W. F. IEEE Photonics Technol. Lett. 2013, 25, 2205. doi:10.1109/LPT.2013.2283215 doi: 10.1109/LPT.2013.2283215
3. [3]
  Liu, Z. W.; Helander, M. G.; Wang, Z. B.; Lu, Z. H. Org. Electron. 2013, 14, 852. doi:10.1016/j.orgel.2013.01.009 doi: 10.1016/j.orgel.2013.01.009
4. [4]
  Zeng, W. J.; Bi, R.; Zhang, H. M.; Huang, W. J. Appl. Phys. 2013, 116, 224502. doi:10.1063/1.4903752 doi: 10.1063/1.4903752
5. [5]
  Zuo, L. M.; Han, G.G.; Sheng, R.; Xue, K. W.; Duan, Y.; Chen, P.; Zhao, Y. RSC Adv. 2016, 6, 55017. doi:10.1039/c6ra07741b doi: 10.1039/c6ra07741b
6. [6]
  Wu, Z. X.; Yang, Z. L.; Xue, K.; Fei, C. C.; Wang, F.; Yan, M. N.; Zhang, H. M.; Ma, D. G.; Huang, W. RSC Adv. 2018, 8, 11255. doi:10.1039/c7ra13355c doi: 10.1039/c7ra13355c
7. [7]
  Han, T. H.; Choi, M. R.; Woo, S. H.; Min, S. Y.; Lee, C. L.; Lee, T. W. Adv. Mater. 2012, 24, 1487. doi:10.1002/adma.201104316 doi: 10.1002/adma.201104316
8. [8]
  Han, T. H.; Kim, Y. H.; Kim, M. H.; Song, W.; Lee, T. W. ACS Appl. Mater. Interfaces 2016, 8, 6152. doi:10.1021/acsami.5b11791 doi: 10.1021/acsami.5b11791
9. [9]
  Wang, Y. P.; Wang, W. J.; Huang, Z. J.; Wang, H. H.; Zhao, J. T.; Yu, J. H.; Ma, D. G. J. Mater. Chem. C 2018, 6, 7042. doi:10.1039/c8tc01639a doi: 10.1039/c8tc01639a
10. [10]
  Miao, Y. Q.; Wang, K. X.; Gao, L.; Zhao, B.; Wang, H.; Zhu, F. R.; Xu, B. S.; Ma, D. G. J. Mater. Chem. C 2018, 6, 8122. doi:10.1039/c8tc02479k doi: 10.1039/c8tc02479k
11. [11]
  Zhang, T. M.; Shi, C. S.; Zhao, C. Y.; Wu, Z. B.; Chen, J. S.; Xie, Z. Y.; Ma, D. G. ACS Appl. Mater. Interfaces 2018, 10, 8148. doi:10.1021/acsami.8b00513 doi: 10.1021/acsami.8b00513
12. [12]
  Kim, D. H.; Lee, W. H.; Jesuraj, P. J.; Hafeez, H.; Lee, J. C.; Choi, D. K.; Song, A.; Chung, K. B.; Bae, T. S.; Song, M.; et al. Org. Electron. 2018, 61, 343. doi:10.1016/j.orgel.2018.06.013 doi: 10.1016/j.orgel.2018.06.013
13. [13]
  Tse, S. C.; Tsung, K. K.; So, S. K. Appl. Phys. Lett. 2007, 90, 213502. doi:10.1063/1.2740110 doi: 10.1063/1.2740110
14. [14]
  Kasparek, C.; Rorich, I.; Blom, P. W. M.; Wetzelaer, G. J. A. H. J. Appl. Phys. 2018, 123, 024504. doi:10.1063/1.5007329 doi: 10.1063/1.5007329
15. [15]
  Kim, J. H.; Chen, Y.; Liu, R.; So, F. Org. Electron. 2014, 15, 2381. doi:10.1016/j.orgel.2014.07.012 doi: 10.1016/j.orgel.2014.07.012
16. [16]
  Choi, W. H.; Cheung, C. H.; So, S. K. Org. Electron. 2010, 11, 872. doi:10.1016/j.orgel.2010.02.001 doi: 10.1016/j.orgel.2010.02.001
17. [17]
  Zheng, H.; Zhang, F.; Zhou, N. L.; Su, M. N.; Li, X. G.; Xiao, Y.; Wang, S. R. Org. Electron. 2018, 56, 89. doi:10.1016/j.orgel.2018.01.038 doi: 10.1016/j.orgel.2018.01.038
18. [18]
  Zhu, W. J.; Chen, X. L.; Chang, J. F.; Yu, R. M.; Li, H. R.; Liang, D.; Wu, X. Y.; Wang, Y. S.; Lu, C. Z. J. Mater. Chem. C 2018, 6, 7242. doi:10.1039/c8tc01005f doi: 10.1039/c8tc01005f
19. [19]
  Tsai, C. T.; Liu, Y. H.; Tang, J. F.; Kao, P. C.; Chiang, C. H.; Chu, S. Y. Synth. Met. 2018, 243, 121. doi:10.1016/j.synthmet.2018.06.008 doi: 10.1016/j.synthmet.2018.06.008
20. [20]
  Zhang, X. W.; Zheng, Q. H.; Tang, Z. Y.; Li, W. S.; Zhang, Y.; Xu, K.; Xue, X. G.; Xu, J. W.; Wang, H.; Wei, B. Appl. Phys. Lett. 2018, 112, 083302. doi:10.1063/1.5016411 doi: 10.1063/1.5016411
21. [21]
  Xu, H. T.; Zhou, X. J. Appl. Phys. 2013, 114, 244505. doi:10.1063/1.4852835 doi: 10.1063/1.4852835
22. [22]
  You, H.; Dai, Y. F.; Zhang, Z. Q.; Ma, D. G. J. Appl. Phys. 2007, 101, 026105. doi:10.1063/1.2430511 doi: 10.1063/1.2430511
23. [23]
  Chiu, T. L.; Chuang, Y. T. J. Nanosci. Nanotech. 2015, 15, 9207. doi:10.1166/jnn.2015.11415 doi: 10.1166/jnn.2015.11415
24. [24]
  Lv, Z. Y.; Deng, Z. B.; Xu, D. H.; Li, X. F.; Jia, Y. Displays 2009, 30, 23. doi:10.1016/j.displa.2008.10.001 doi: 10.1016/j.displa.2008.10.001
25. [25]
  Niu, L. B.; Guan, Y. X. Acta Phys. Sin. 2009, 58, 4931. doi: 10.7498/aps.58.4931
26. [26]
  Lee, J. Y.; Kwon, J. H. Appl. Phys. Lett. 2005, 86, 063514. doi:10.1063/1.1861962 doi: 10.1063/1.1861962
27. [27]
  Yuan, Y.; Grozea, D.; Lu, Z. H. Appl. Phys. Lett. 2005, 86, 143509. doi:10.1063/1.1899241 doi: 10.1063/1.1899241
28. [28]
  Li, X. C.; Xie, F. X.; Zhang, S. Q.; Hou, J. H.; Choy, W. C. H. Adv. Funct. Mater. 2014, 24, 7348. doi:10.1002/adfm.201401969 doi: 10.1002/adfm.201401969
29. [29]
  Yang, J. P.; Wang, W. Q.; Cheng, L. W.; Li, Y. Q.; Tang, J. X.; Kera, S.; Ueno, N.; Zeng, X. H. J. Phys.:Condens. Matter 2016, 28, 185502. doi:10.1088/0953-8984/28/18/185502 doi: 10.1088/0953-8984/28/18/185502
30. [30]
  Zhang, H. M.; Fu, Q.; Zeng, W. J.; Ma, D. G. J. Mater. Chem. C 2014, 2, 9620. doi:10.1039/c4tc01310g doi: 10.1039/c4tc01310g
31. [31]
  Pandey, R.; Gunawan, A. A.; Mkhoyan, K. A.; Holmes, R. J. Adv. Funct. Mater. 2012, 22, 617. doi:10.1002/adfm.201101948 doi: 10.1002/adfm.201101948
32. [32]
  Lee, H.; Kim, J. Y.; Lee, C. Int. J. Photoenergy 2012, 2012, 581421 doi:10.1155/2012/581421 doi: 10.1155/2012/581421
33. [33]
  Shin, W. J.; Lee, J. Y.; Kim, J. C.; Yoon, T. H.; Kim, T. S.; Song, O. K. Org. Electron. 2008, 9, 333. doi:10.1016/j.orgel.2007.12.001 doi: 10.1016/j.orgel.2007.12.001
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沈阳化工大学材料科学与工程学院沈阳 110142

Single-Layer Organic Light-Emitting Devices with C60 and MoO3 Mixed Materials as Hole Injection Layer

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Single-Layer Organic Light-Emitting Devices with C₆₀ and MoO₃ Mixed Materials as Hole Injection Layer