Wenjing Zhang, Qin Zhang, Liang Yang, Ying Jiang, Chun Chang, Xiao Jin, Feng Li, Yan Huang, Qinghua Li. Improved Charge Balance of Quantum Dot Light-Emitting Diodes via Spiro-OMeTAD Electron Blocking Layer[J]. Acta Optica Sinica, 2019, 39(5): 0523003
- Acta Optica Sinica
- Vol. 39, Issue 5, 0523003 (2019)
Fig. 1. Green CdSe/ZnS nuclear shell quantum dots. (a) TEM image; (b) high-resolution TEM image; (c) XRD pattern; (d) atomic absorption and photoluminescence (PL) spectra
Fig. 2. Device based on Green CdSe/ZnS nuclear shell quantum dots. (a) Structural diagram; (b) energy level diagram
Fig. 3. AFM images of Spiro-OMeTAD buffer layers with different amounts of spin coating. (a) 20 μL; (b) 40 μL; (c) 60 μL; (d) 80 μL; (e) 100 μL
Fig. 4. Performance comparison of traditional devices and those added with Spiro-OMeTAD electronic buffer layer. (a) External quantum efficiency and current efficiency versus voltage; (b) brightness versus voltage; (c) current density versus voltage
Fig. 5. Electroluminescence (EL) spectra. (a) Traditional device; (b) device added with Spiro-OMeTAD buffer layer; (c) brightness of traditional device and that added with Spiro-OMeTAD electronic buffer layer versus time at constant current
Fig. 6. Schematics of electron transport. (a) Traditional device; (b) device added with Spiro-OMeTAD buffer layer
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Table 1. Performances of device prepared with different amounts of Spiro-OMeTAD spin coating
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