logo

SCIENTIA SINICA Informationis, Volume 50 , Issue 1 : 151-162(2020) https://doi.org/10.1360/N112019-00027

Study of the microscopic mechanism of Ir(ppy)$_{3}$ regulating exciton splitting and luminescence process in Rubrene

More info
  • ReceivedJan 29, 2019
  • AcceptedMay 5, 2019
  • PublishedJan 9, 2020

Abstract


Funded by

国家自然科学基金(11874305)


References

[1] Podzorov V, Menard E, Borissov A. Intrinsic Charge Transport on the Surface of Organic Semiconductors. Phys Rev Lett, 2004, 93: 086602 CrossRef PubMed ADS Google Scholar

[2] Ma L, Zhang K, Kloc C. Singlet fission in Rubrene single crystal: direct observation by femtosecond pump-probe spectroscopy. Phys Chem Chem Phys, 2012, 14: 8307-8312 CrossRef PubMed ADS Google Scholar

[3] Chen Q S. Investigation of magnetic filed effects in organic light emitting devices based on Rubrebe. Dissertation for Master Degree. Chongqing: Southwest University, 2016. Google Scholar

[4] Zhang Y, Forrest S R. Triplets Contribute to Both an Increase and Loss in Fluorescent Yield in Organic Light Emitting Diodes. Phys Rev Lett, 2012, 108: 267404 CrossRef PubMed ADS Google Scholar

[5] Liu Y L, Lei Y L, Jiao Y, et al. Influence of the singlet exciton fission process at different temperatures on the magneto-electroluminescence in the Rubrene-based organic light emitting device. Sci Sin Phys Mech Astron, 2013, 43: 54--60. Google Scholar

[6] Briseno A L, Tseng R J, Ling M M. High-Performance Organic Single-Crystal Transistors on Flexible Substrates. Adv Mater, 2006, 18: 2320-2324 CrossRef Google Scholar

[7] Bai J W, Chen P, Lei Y L. Studying singlet fission and triplet fusion by magneto-electroluminescence method in singlet-triplet energy-resonant organic light-emitting diodes. Org Electron, 2014, 15: 169-174 CrossRef Google Scholar

[8] Jia W, Chen Q, Chen Y. Magneto-conductance characteristics of trapped triplet-polaron and triplet-trapped polaron interactions in anthracene-based organic light emitting diodes. Phys Chem Chem Phys, 2016, 18: 30733-30739 CrossRef PubMed ADS Google Scholar

[9] Chen Y B. Study on microscopic processes of triplet excitons in Rubrene-based organic light emitting diodes by utilizing organic magnetic field effects. Dissertation for Master Degree. Chongqing: Southwest University, 2017. Google Scholar

[10] Tang X, Hu Y, Jia W. Intersystem Crossing and Triplet Fusion in Singlet-Fission-Dominated Rubrene-Based OLEDs Under High Bias Current. ACS Appl Mater Interfaces, 2018, 10: 1948-1956 CrossRef Google Scholar

[11] Piland G B, Burdett J J, Kurunthu D. Magnetic Field Effects on Singlet Fission and Fluorescence Decay Dynamics in Amorphous Rubrene. J Phys Chem C, 2013, 117: 1224-1236 CrossRef Google Scholar

[12] Smith M B, Michl J. Singlet fission.. Chem Rev, 2010, 110: 6891-6936 CrossRef PubMed Google Scholar

[13] Chen Y B, Yuan D, Xiang J, et al. Analysis of triplet dissociation and electron scattering in the Rubrene-based devices by utilizing magneto-conductance. Sci Sin Tech, 2016, 46: 61--67. Google Scholar

[14] Baldo M A, Thompson M E, Forrest S R. High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer. Nature, 2000, 403: 750-753 CrossRef PubMed Google Scholar

[15] Zhang T, Xu Z, Qian L, et al. Optical and morphological investigation in interaction of dual dopants in poly (N-vinylcarzole). J Lumin, 2007, 122: 275--278. Google Scholar

[16] Kanno H, Sun Y, Forrest S R. White organic light-emitting device based on a compound fluorescent-phosphor-sensitized-fluorescent emission layer. Appl Phys Lett, 2006, 89: 143516 CrossRef Google Scholar

[17] Song D D, Zhao S L, Xu Z, et al. Study on the sensitizing effect of fac-tris(2-phenylpyridinato-N,C$^{2'}$)iridium(III) on two different fluorescent materials. Spectrosc Spectr Anal, 2009, 29: 2626--2629. Google Scholar

[18] Zhao Y, Zhu L, Chen J. Improving color stability of blue/orange complementary white OLEDs by using single-host double-emissive layer structure: Comprehensive experimental investigation into the device working mechanism. Org Electron, 2012, 13: 1340-1348 CrossRef Google Scholar

[19] Chen P, Lei Y L, Song Q L. Control of magnetoconductance through modifying the amount of dissociated excited states in tris-(8-hydroxyquinoline) aluminum-based organic light-emitting diodes. Appl Phys Lett, 2010, 96: 203303 CrossRef ADS Google Scholar

[20] Huang W, Mi B X, Gao Z Q. Organic Electronics. Beijing: Science Press, 2011. Google Scholar

[21] Xu H H, Xu Z, Zhang F J, et al. Phosphorescent effect of Ir(ppy)$_{3~}$on the luminescent characteristic of Rubrene. Spectrosc Spec Anal, 2008, 28: 1608--1611. Google Scholar

[22] Li Y R, Zhao S L, Yang S P, et al. Properties of energy transfer in two host materials doped with Ir(ppy)$_{3}$ and Rubrene. Spectrosc Spec Anal, 2009, 29: 1--5. Google Scholar

[23] Jiang W L, Ding G Y, Wang J, et al. Highly efficient white phosphorescent organic light-emitting devices using an electron/exciton blocker. J Optoelectron Laser, 2008, 19: 595--598. Google Scholar

  • Figure 1

    (Color online) The device optical and electronic properties. (a) The diagram of device structure; (b) the $I$-$V$ curves of devices, the inset is the molecular structures; (c) the normalized PL spectra of Ir(ppy)$_3$ and Rubrene films;protect łinebreak (d) the brightness intensity of devices with different concentrations under various injection currents at room temperature

  • Figure 2

    (Color online)The MEL response curves of the reference device and the Rubrene: 10%Ir(ppy)$_3$device at different temperatures and injection currents. (a)–(d) Rubrene: 10%Ir(ppy)$_3$ devices; (e)–(h) reference devices

  • Figure 3

    (Color online) (a) Temperature-dependent MEL curves of the Rubrene:10%Ir(ppy)$_{3}$ device at 10 $\mu~$A;protect łinebreak (b) temperature-dependentMEL$_{\rm~HFE}$ values of the reference device and the Rubrene:10%Ir(ppy)$_{3}$ device

  • Figure 4

    (Color online) (a) Mixing concentrations-dependent MEL curves ofdevice Rubrene: $x$%Ir(ppy)$_{3}$ at room temperature when the current is 10$\mu~$A; (b) mixing concentrations-dependent MEL$_{\rm~HFE}$ value underdifferent currents at room temperature; (c) mixing concentrations-dependentMEL curves of device Rubrene: $x$%Ir(ppy)$_{3}$ at 20 K when the current is10 $\mu~$A; (d) mixing concentrations-dependent MEL$_{\rm~HFE}$ value underdifferent temperature at 10 $\mu~$A

  • Figure 5

    (Color online) (a) The microscopic processes of devices; (b) theschematic of microscopic process of exciton and polaron betweenIr(ppy)$_{3}$ and Rubrene at low concentration mixing; (c) the MEL$_{B~=~300}$ values and brightness intensity of devices with various differentconcentrations at room temperature and the injection current of 10 $\mu~$A;(d) the schematic of microscopic process of exciton and polaron betweenIr(ppy)$_{3}$ and Rubrene at high concentration mixing. The circlesrepresent Rubrene, and the triangles represent Ir(ppy)$_{3~}$ in (b) and (d)