Author Affiliations
1Microelectronic Research and Development Center, Shanghai University, Shanghai 200444, China2Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China3School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, Chinashow less
Fig. 1. Structure of WLED. (a) Structure of WLED Ⅰ; (b) structure of WLED Ⅱ
Fig. 2. Absorption and PL spectra of quantum dot film. (a) Absorption spectrum of green quantum dot film, insets are photographs of green quantum dot film in natural light and darkness; (b) PL spectra of green quantum dot film; (c) absorption spectrum of red quantum dot film, insets are photographs of red quantum dot film in natural light and darkness; (d) PL spectra of red quantum dot film
Fig. 3. Electroluminescence spectra of WLED. (a) Electroluminescence spectrum of WLED I, insets are photographs of WLED Ⅰ in natural light and darkness; (b) electroluminescence spectrum of WLED II, insets are photographs of WLED Ⅱ in natural light and darkness
Fig. 4. Stability test results of WLED at different driving currents. (a) Electroluminescence spectral changes of WLED I; (b) electroluminescence spectral changes of WLED II; (c) CIE color coordinate changes of WLED I; (d) CIE color coordinate changes of WLED II; (e) CCT changes of WLED I and WLED II; (f) LE changes of WLED I and WLED II; (g) CE changes of WLED I and WLED II; (h) CRI changes of WLED I and WLED II
Fig. 5. Thermal imaging photographs of WLED at different driving currents (unit: ℃). (a)--(c) Thermal imaging photographs of WLED I with driving currents of 20, 100, and 350 mA; (d)--(f) thermal imaging photographs of WLED Ⅱ with driving currents of 20, 100, and 350 mA
Fig. 6. Aging test of WLED at 55 ℃ and 55% relative humidity (20 mA continuous operating current). (a) Electroluminescence spectra of WLED Ⅰ; (b) electroluminescence spectra of WLED Ⅱ; (c) LE of WLED Ⅰ and WLED Ⅱ; (d) CRI of WLED Ⅰ and WLED Ⅱ