Due to their great potential in wearable and portable electronics,flexible perovskite solar cells(FPSCs)have been extensively studied.The major challenges in the practical applications of FPSCs are efficiency,operatio...Due to their great potential in wearable and portable electronics,flexible perovskite solar cells(FPSCs)have been extensively studied.The major challenges in the practical applications of FPSCs are efficiency,operational stability,and mechanical stability.Herein,we developed a facile approach by incorporating a cross-linking oligomer of trimethylolpropane ethoxylate triacrylate(TET)into perovskite films to simultaneously enhance the power conversion efficiency(PCE)and stability of FPSCs.A PCE of 20.32%was achieved,which are among the best results for the inverted FPSCs.Both mechanical and environmental stabilities were improved for the TET-incorporated FPSCs.In particular,the PCE retained approximately87%of its initial value after 20,000 bending cycles at a radius of 4 mm.The inverted FPSCs retained 85%of the initial PCE after 500 h storage at 85°C and 90%after 900 h continuous one-sun illumination.A joint experiment–theory analysis ascribed the underlying mechanism to the reduced defect densities,improved crystallinity,and stability of the perovskite absorbers on flexible substrates caused by TET incorporation.展开更多
In this paper, we demonstrate a color tunable white organic light-emitting devices （WOLEDs） based on the two complementary color strategies by introducing two-dimensional （2-D） dual periodic gratings. It is possib...In this paper, we demonstrate a color tunable white organic light-emitting devices （WOLEDs） based on the two complementary color strategies by introducing two-dimensional （2-D） dual periodic gratings. It is possible to tune the color in a range between cold-white and warmwhite by simply operating the polarization of polarizer in front of the microstructured WOLEDs. Experimental and numerical results demonstrate that color tunability of the WOLEDs comes from the effect of the 2-D dual periodic gratings by exciting the surface plasmon-polariton （SPP） resonance associated with the cathode/organic interface. The electroluminescence （EL） performance of the WOLEDs have also been improved due to the effective light extraction by excitation and out-coupling of the SPP modes, and a 39.65% enhancement of current efficiency has been obtained compared to the conventional planar devices.展开更多
基金supported by the National Key Research and Development Program of China(2020YFA0715000)the National Natural Science Foundation of China(61825402)。
文摘Due to their great potential in wearable and portable electronics,flexible perovskite solar cells(FPSCs)have been extensively studied.The major challenges in the practical applications of FPSCs are efficiency,operational stability,and mechanical stability.Herein,we developed a facile approach by incorporating a cross-linking oligomer of trimethylolpropane ethoxylate triacrylate(TET)into perovskite films to simultaneously enhance the power conversion efficiency(PCE)and stability of FPSCs.A PCE of 20.32%was achieved,which are among the best results for the inverted FPSCs.Both mechanical and environmental stabilities were improved for the TET-incorporated FPSCs.In particular,the PCE retained approximately87%of its initial value after 20,000 bending cycles at a radius of 4 mm.The inverted FPSCs retained 85%of the initial PCE after 500 h storage at 85°C and 90%after 900 h continuous one-sun illumination.A joint experiment–theory analysis ascribed the underlying mechanism to the reduced defect densities,improved crystallinity,and stability of the perovskite absorbers on flexible substrates caused by TET incorporation.
基金The authors gratefully acknowledge support from the National Basic Research Program of China （973 Program） （No. 2013CBA01700）, the National Natural Science Foundation of China （NSFC） （Grant Nos. 61322402, 91233123 and 61177024）.
文摘In this paper, we demonstrate a color tunable white organic light-emitting devices （WOLEDs） based on the two complementary color strategies by introducing two-dimensional （2-D） dual periodic gratings. It is possible to tune the color in a range between cold-white and warmwhite by simply operating the polarization of polarizer in front of the microstructured WOLEDs. Experimental and numerical results demonstrate that color tunability of the WOLEDs comes from the effect of the 2-D dual periodic gratings by exciting the surface plasmon-polariton （SPP） resonance associated with the cathode/organic interface. The electroluminescence （EL） performance of the WOLEDs have also been improved due to the effective light extraction by excitation and out-coupling of the SPP modes, and a 39.65% enhancement of current efficiency has been obtained compared to the conventional planar devices.
