Xiaoqi Wang, Cong Wang. Influence of Shell Thickness on Luminescent Properties of Cu-Doped Zn-In-S/ZnS Core/Shell Quantum Dots WLEDs[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1723003
- Laser & Optoelectronics Progress
- Vol. 58, Issue 17, 1723003 (2021)
Fig. 1. Structure of QD white LED with three different proportions and electroluminescence of QD white LED
Fig. 2. Photographs of the TEM and HRTEM of Cu∶Zn-In-S core and Cu∶Zn-In-S/ZnS core/shell QDs with different shell thickness. (a) Thin shell, TEM photograph; (b) thin shell, HRTEM photograph;(c) thick shell, TEM photograph; (d) thick shell, HRTEM photograph
Fig. 3. Normalized PL spectra of green and orange quantum dots with thin and thick shells
Fig. 4. PL spectra of thick shell Cu∶Zn-In-S/ZnS core/shell quantum dot WLED prepared by toluene solutions of orange and green quantum dots with different volume fractions of 1∶13,1∶11,1∶15 at 20 mA to 100 mA. (a) 1∶13; (b) 1∶11; (c) 1∶15
Fig. 5. Color coordinates of quantum dot WLED
Fig. 6. CRI of fluorescent lamp and Cu∶Zn-In-S/ZnS core/shell QD WLED operated at 20 mA
Fig. 7. PL spectra of Cu∶Zn-In-S/ZnS core/shell quantum dots WLEDs with different shell thickness at 20 mA (volume fraction of orange and green quantum dots toluene solutions is 1∶13)
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Table 1. CRI, CCT, CIE, LE of thick and thin shell Cu∶Zn-In-S/ZnS core/shell QD-WLEDs at 20 mA current
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