Lim Taekyung, Jeong Sang-Mi, Seo Hee Sung, Yang Jonguk, Ju Sanghyun
Major in Nano Semiconductor, School of Electronic Engineering, Kyonggi University Suwon Gyeonggi-do 16227 Republic of Korea
RSC Adv. 2025 Aug 15;15(35):28881-28888. doi: 10.1039/d5ra02339d. eCollection 2025 Aug 11.
Light-irradiation-based color-conversion displays are considered an emerging technology with considerable potential because they are easy to fabricate; however, color precision is limited by inefficient heating and uneven temperature distribution, and pattern extinction is delayed by poor heat dissipation. This study proposes a light-irradiation-based color-conversion display that can produce full color from a near-infrared (NIR) laser using carbon nanotubes (CNTs) with efficient photothermal conversion and heat-diffusion functions. Light-irradiation-based color-conversion displays have a more straightforward structure than conventional electronic-circuit-based displays. The proposed design uses an NIR laser as the driving energy source, which makes it highly efficient. In addition, a color-conversion layer based on a thermochromic liquid crystal (TLC) changes the color to red, green, or blue depending on the temperature, and a CNT-based thermal property control layer, which reacts to NIR photothermally, is used to achieve immediate thermal control. These layers can be applied to a flexible substrate to maintain stable performance, even under bending or deformation. Precisely controlling the laser power can help achieve a subtle temperature change of 27-32 °C and generate a corresponding color change in a specific area of the TLC-based color-conversion layer. Considering rapid and reversible color conversion is achievable by turning the NIR laser on and off, this method is suitable for various applications, such as high-speed responsive displays, smart sensors, and customizable visual information systems.
基于光照射的颜色转换显示器被认为是一种具有巨大潜力的新兴技术，因为它们易于制造；然而，颜色精度受到加热效率低下和温度分布不均匀的限制，并且图案消光因散热不良而延迟。本研究提出了一种基于光照射的颜色转换显示器，该显示器可以使用具有高效光热转换和热扩散功能的碳纳米管（CNT）从近红外（NIR）激光产生全彩色。基于光照射的颜色转换显示器的结构比传统的基于电子电路的显示器更简单。所提出的设计使用近红外激光作为驱动能源，这使其具有很高的效率。此外，基于热致变色液晶（TLC）的颜色转换层根据温度将颜色变为红色、绿色或蓝色，并且使用基于碳纳米管的热性能控制层，该层对近红外光产生光热反应，以实现即时热控制。这些层可以应用于柔性基板，即使在弯曲或变形的情况下也能保持稳定的性能。精确控制激光功率有助于实现27 - 32°C的细微温度变化，并在基于TLC的颜色转换层的特定区域产生相应的颜色变化。考虑到通过打开和关闭近红外激光可以实现快速且可逆的颜色转换，这种方法适用于各种应用，如高速响应显示器、智能传感器和可定制视觉信息系统。
