High-Efficiency ZnO-Based Ultraviolet Photodetector with Integrated Single-Walled Carbon Nanotube Thin-Film Heater,Advanced Materials Interfaces

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High-Efficiency ZnO-Based Ultraviolet Photodetector with Integrated Single-Walled Carbon Nanotube Thin-Film Heater
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2023-04-18 , DOI: 10.1002/admi.202300176
Jeong‐Hyeon Kim ₁ , Jongyun Choi ₁ , Hyunseok Na ₂ , Sung‐Nam Lee _{1,

3}

Affiliation

Recently, sol–gel-derived ZnO thin films have been explored for high performance photodetectors (PDs). However, the crystallinity of sol–gel-derived ZnO films is inferior to vacuum-based grown ZnO film, leading to poor photoreaction in the PDs. This study combines a single-walled carbon nanotube (SWCNT) heating system with sol–gel ZnO-based ultraviolet (UV) PDs. A SWCNT heater is fabricated on sapphire substrates using spin coating technique, resulting in a transparent heater with a transmittance of ≈80% by controlling spin speed. In addition, increasing the number of SWCNT spin coatings from 1 to 3 raises the heater temperature to over 170 °C, resulting in a response time of less than 1 min. The sol–gel ZnO-based UV PDs with the SWCNT heater shows a 137% increase in photocurrent as the SWCNT heater temperature increases from 25 to 112 °C. In addition, the increase in temperature of the embedded-SWCNT heater significantly shortens the rise and decay times of the sol–gel-derived ZnO PDs.

中文翻译：

具有集成单壁碳纳米管薄膜加热器的高效 ZnO 基紫外线光电探测器

最近，已经探索了溶胶-凝胶衍生的 ZnO 薄膜用于高性能光电探测器 (PD)。然而，溶胶-凝胶衍生的 ZnO 薄膜的结晶度不如真空生长的 ZnO 薄膜，导致 PD 中的光反应较差。本研究将单壁碳纳米管 (SWCNT) 加热系统与基于溶胶-凝胶 ZnO 的紫外 (UV) PD 相结合。使用旋涂技术在蓝宝石衬底上制造单壁碳纳米管加热器，通过控制旋转速度得到透光率≈80% 的透明加热器。此外，将 SWCNT 旋涂的数量从 1 层增加到 3 层会使加热器温度升高到 170 °C 以上，从而导致响应时间少于 1 分钟。当 SWCNT 加热器温度从 25 °C 升高到 112 °C 时，带有 SWCNT 加热器的基于溶胶-凝胶 ZnO 的 UV PD 显示光电流增加了 137%。

更新日期：2023-04-18

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