Bottom-emitting organic light-emitting diodes （BOLEDs）, using AI/MoO3 as the semitransparent anode and LiF/Al as the reflective cathode and Alqa as the emitter, are fabricated. At the same time, the performance impr...Bottom-emitting organic light-emitting diodes （BOLEDs）, using AI/MoO3 as the semitransparent anode and LiF/Al as the reflective cathode and Alqa as the emitter, are fabricated. At the same time, the performance improvement of the BOLEDs having a capping layer inserted between the semitransparent anode and the glass substrate is studied. The optimized microcavity BOLED shows a current efficiency （5.49cd/A） enhancement of 10% compared with a conventional BOLED based on ITO （5.0cd/A）. Slight color variation is observed in 120° forward viewing angle with 5Onto BCP as the capping layer. Strong dependence of efficiency on A1 anode thickness and the thickness and refractor index of the capping layer is explained. The results indicate that the BOLEDs with the double-aluminum electrode have potential practical applications.展开更多
Pulsed anodic oxidation technique, a new way of forming current blocking layers, was successfully used in ridge-waveguide QW laser fabrication. This method was applied in 980 nm VCSELs fabrication to form a high-quali...Pulsed anodic oxidation technique, a new way of forming current blocking layers, was successfully used in ridge-waveguide QW laser fabrication. This method was applied in 980 nm VCSELs fabrication to form a high-quality native oxide current blocking layer, which simplifies the device process. A significant reduction of threshold current and a distinguished device performance are achieved. The 500 μm diameter device has a current threshold as low as 0.48 W. The maximum CW operation output power at room temperature is 1.48 W. The lateral divergence angle θ‖ and vertical divergence angle θ⊥ are as low as 15.3° and 13.8° without side-lobes at a current of 6 A.展开更多
基金Supported by the Nanjing University of Telecommunications and Posts under Grant Nos NY212010 and NY212034the National Natural Science Foundation of China under Grant Nos 91233117 and 51333007+2 种基金the Natural Science Fund in Jiangsu Province under Grant No BK2012834the National Basic Research Program of China under Grant No 2015CB932200the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Bottom-emitting organic light-emitting diodes （BOLEDs）, using AI/MoO3 as the semitransparent anode and LiF/Al as the reflective cathode and Alqa as the emitter, are fabricated. At the same time, the performance improvement of the BOLEDs having a capping layer inserted between the semitransparent anode and the glass substrate is studied. The optimized microcavity BOLED shows a current efficiency （5.49cd/A） enhancement of 10% compared with a conventional BOLED based on ITO （5.0cd/A）. Slight color variation is observed in 120° forward viewing angle with 5Onto BCP as the capping layer. Strong dependence of efficiency on A1 anode thickness and the thickness and refractor index of the capping layer is explained. The results indicate that the BOLEDs with the double-aluminum electrode have potential practical applications.
文摘Pulsed anodic oxidation technique, a new way of forming current blocking layers, was successfully used in ridge-waveguide QW laser fabrication. This method was applied in 980 nm VCSELs fabrication to form a high-quality native oxide current blocking layer, which simplifies the device process. A significant reduction of threshold current and a distinguished device performance are achieved. The 500 μm diameter device has a current threshold as low as 0.48 W. The maximum CW operation output power at room temperature is 1.48 W. The lateral divergence angle θ‖ and vertical divergence angle θ⊥ are as low as 15.3° and 13.8° without side-lobes at a current of 6 A.
