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Flash-Assisted Processing of Highly Conductive Zinc Oxide Electrodes from Water

机译：闪光辅助加工高导电性氧化锌电极

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摘要

Fabricating high-quality transparent conductors using inexpensive and industrially viable techniques is a major challenge toward developing low cost optoelectronic devices such as solar cells, light emitting diodes, and touch panel displays. In this work, highly transparent and conductive ZnO thin films are prepared from a low-temperature, aqueous deposition method through the careful control of the reaction chemistry. A robotic synthetic platform is used to explore the wide parameter space of a chemical bath system that uses only cheap and earth abundant chemicals for thin film deposition. As-deposited films are found to be highly resistive, however, through exposure to several millisecond pulses of high-intensity, broadband light, intrinsically doped ZnO films with sheet resistances as low as 40 (-1) can be readily prepared. Such values are comparable with state-of-the-art-doped transparent conducting oxides. The mild processing conditions (<150 degrees C) of the ZnO electrodes also enable their deposition on temperature sensitive substrates such as PET, paving the way for their use in various flexible optoelectronic devices. Proof-of-concept light emitting devices employing ZnO as a transparent electrode are presented.
机译：使用廉价且工业上可行的技术来制造高质量透明导体是开发低成本光电器件（例如太阳能电池，发光二极管和触摸面板显示器）的主要挑战。在这项工作中，通过仔细控制反应化学，通过低温水沉积方法制备高透明和导电的ZnO薄膜。机器人合成平台用于探索化学浴系统的宽参数空间，该化学浴系统仅使用廉价且富含地球的化学物质进行薄膜沉积。发现沉积的薄膜具有高电阻性，但是，通过暴露于几毫秒的高强度脉冲下，宽带光可以很容易地制备出表面电阻低至40（-1）的内在掺杂的ZnO薄膜。这样的值可与最新掺杂的透明导电氧化物相媲美。 ZnO电极的温和加工条件（<150摄氏度）也使其能够沉积在温度敏感的基材（如PET）上，从而为它们在各种柔性光电设备中的使用铺平了道路。提出了使用ZnO作为透明电极的概念验证发光器件。

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