High performance organic light-emitting diodes ͑OLEDs͒ were implemented on transparent and conductive single-wall carbon nanotube sheets. At the maximum achieved brightness of 2800 cd m −2 the luminance efficiency of our carbon nanotube-based OLED is 1.4 cd A −1 which is comparable to the 1.9 cd A −1 measured for an optimized indium tin oxide anode device made under the same experimental conditions. A thin parylene buffer layer between the carbon nanotube anode and the hole transport layer is required in order to readily achieve the measured performance.
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