Properties of a field emission lighting plane employing highly crystalline single-walled carbon nanotubes fabricated by simple processes
Properties of a field emission lighting plane employing highly crystalline single-walled carbon nanotubes fabricated by simple processes
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DOI：
10.1016/j.carbon.2013.08.018
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发表时间：
2013-12
期刊：
影响因子：
10.9
通讯作者：
N. Shimoi;A. Estrada;Yasumitsu Tanaka;K. Tohji
中科院分区：
文献类型：
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作者：
N. Shimoi;A. Estrada;Yasumitsu Tanaka;K. Tohji
我们开发了一种用于可见光平面发射装置的新型阴极，该阴极由分散在有机 In2O3-SnO2 前体溶液和非离子表面活性剂中的高度结晶单壁碳纳米管（SWNT）的混合物形成。通过简单的薄膜刻划工艺，可以制备出具有高度均匀分散的单壁碳纳米管的薄膜场发射阴极，具有低驱动电压、高电子发射均匀性和高亮度效率。使用优化阴极的二极管的导通场为1.2 V/μm，该平面内的亮度均匀性与照明平面内的平均亮度相比在5%以内。通过采用高度结晶的SWNT，控制涂膜中SWNT 含量的照明装置实现了良好的亮度均匀性。此外，亮度效率和发射寿命是比较发光器件时的重要因素，总计超过 70 lm/W，达到初始场发射电流密度的一半时间超过 5000 小时。这种平面发射器件有潜力为日常生活中的照明提供一种新方法，因为它通过其低功耗有助于节能。
We developed a new cathode for a visible ray flat plane-emission device formed from a mixture of highly crystalline single-walled carbon nanotubes (SWNTs) dispersed into an organic In2O3–SnO2precursor solution and a non-ionic surfactant. A thin film field emission cathode having highly homogeneously dispersed SWNTs was able to be fabricated with low driving voltage, high electron emission homogeneity in the plane, and high brightness efficiency by employing a simple scratching process for the film.The turn-on field of a diode using the optimized cathode was 1.2 V/μm, with the brightness homogeneity in that plane being within 5% against the averaged brightness in the lighting plane. Favorable brightness homogeneity from the lighting device to control the content of SWNTs in the coated film was achieved by employing highly crystalline SWNTs. Furthermore, brightness efficiency and emission life-time, which are important factors when comparing luminance devices, totaled more than 70 lm/W and over 5000 h until reaching the half time against the initial field emission current density.This flat plane-emission device has the potential to provide a new approach to lighting in everyday life as it contributes to energy saving through its low power consumption.