通过印刷制造的全无机场效应晶体管
1The Media Laboratory, Massachusetts Institute of Technology, 20 Ames Street, Cambridge, MA 02139, USA.
Science (New York, N.Y.)
|October 26, 1999
概括
研究人员使用化纳米晶体打印了无机薄膜晶体管. 这些印刷晶体管具有高场效移动性,超越有机替代品,为低成本,高性能印刷电子产品铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 电子工程 电子工程
背景情况:
- 打印电子产品为传统的半导体制造提供了低成本的替代品.
- 现有的印刷有机晶体管受到电荷载体移动性的限制.
- 高性能无机半导体通常使用能源密集型方法进行加工.
研究的目的:
- 开发一种印刷高性能无机薄膜晶体管的方法.
- 在使用纳米晶体墨水打印的晶体管中实现高场效移动性.
- 探索在柔性基板上低成本,大面积无机电子产品的潜力.
主要方法:
- 合成离散的化 (CdSe) 纳米晶体 (<2 nm) 与最小的有机封闭组.
- 基于CdSe纳米晶的基于溶液的印刷.
- 低温处理以诱导谷物生长并形成单晶域.
主要成果:
- 在印刷的CdSe薄膜晶体管中实现了高达1cm2/Vs的场效应移动性.
- 显示的移动性比之前报道的印刷有机晶体管高出一个数量级.
- 从纳米晶体溶液中观察到低温的颗粒生长,形成大型单晶区域.
结论:
- 通过CdSe纳米晶体解决方案,可以通过打印制造高质量的无机薄膜晶体管.
- 实现的移动性代表了印刷无机电子产品的重大进步.
- 这种方法为在塑料基板上的廉价,高性能打印逻辑电路提供了可行的途径.
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