Pan Teng, Liu Shihao, Zhang Letian, Xie Wenfa, Yu Cunjiang
State Key Laboratory of Integrated Optoelectronics, College of Electronics Science and Engineering, Jilin University, 130012, Changchun, China.
Department of Engineering Science and Mechanics, Department of Biomedical Engineering, Materials Research Institute, Pennsylvania State University, 16802, University Park, USA.
Light Sci Appl. 2022 Mar 14;11(1):59. doi: 10.1038/s41377-022-00760-5.
As a primary anticounterfeiting technology, most paper anticounterfeiting devices take advantage of photoresponsive behaviors of certain security materials or structures, thus featuring low-security threshold, which has been a critical global issue. To incorporate optoelectronic devices into existing anticounterfeiting technology suggests a feasible avenue to address this challenge. Here we report a high-performance organic light-emitting paper-based flexible anticounterfeiting (FAC) device with multiple stimuli-responsiveness, including light, electricity, and their combination. Without sacrificing the preexisted security information on the paper, we fabricate FAC device in a facile, low-cost yet high-fidelity fashion by integrating patterned electro-responsive and photo-responsive organic emitters onto paper substrates. By introducing optical microcavities, the FAC device shows considerable color shift upon different viewing angle and applied voltage, which is easily discernible by naked eyes. Notably, the FAC device is bendable, unclonable, and durable (a half-lifetime over 4000 hours at 100 cd m).
作为一种主要的防伪技术，大多数纸质防伪装置利用某些安全材料或结构的光响应行为，因此安全阈值较低，这一直是一个关键的全球性问题。将光电器件纳入现有的防伪技术为应对这一挑战提供了一条可行途径。在此，我们报告一种具有光、电及其组合等多种刺激响应性的高性能有机发光纸质柔性防伪（FAC）装置。在不牺牲纸张上原有安全信息的情况下，我们通过将图案化的电响应和光响应有机发光体集成到纸质基板上，以简便、低成本且高保真的方式制造出FAC装置。通过引入光学微腔，FAC装置在不同视角和施加电压下会出现明显的颜色变化，肉眼很容易辨别。值得注意的是，FAC装置可弯曲、不可克隆且耐用（在100 cd m下半衰期超过4000小时）。
