Kwon Jong Ik, Park Gyuri, Lee Gwang Heon, Jang Jae Hong, Sung Nak Jun, Kim Seo Young, Yoo Jisu, Lee Kyunghoon, Ma Hyeonjong, Karl Minji, Shin Tae Joo, Song Myoung Hoon, Yang Jiwoong, Choi Moon Kee
Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea.
Sci Adv. 2022 Oct 28;8(43):eadd0697. doi: 10.1126/sciadv.add0697. Epub 2022 Oct 26.
High-definition red/green/blue (RGB) pixels and deformable form factors are essential for the next-generation advanced displays. Here, we present ultrahigh-resolution full-color perovskite nanocrystal (PeNC) patterning for ultrathin wearable displays. Double-layer transfer printing of the PeNC and organic charge transport layers is developed, which prevents internal cracking of the PeNC film during the transfer printing process. This results in RGB pixelated PeNC patterns of 2550 pixels per inch (PPI) and monochromic patterns of 33,000 line pairs per inch with 100% transfer yield. The perovskite light-emitting diodes (PeLEDs) with transfer-printed active layers exhibit outstanding electroluminescence characteristics with remarkable external quantum efficiencies (15.3, 14.8, and 2.5% for red, green, and blue, respectively), which are high compared to the printed PeLEDs reported to date. Furthermore, double-layer transfer printing enables the fabrication of ultrathin multicolor PeLEDs that can operate on curvilinear surfaces, including human skin, under various mechanical deformations. These results highlight that PeLEDs are promising for high-definition full-color wearable displays.
高清晰度红/绿/蓝（RGB）像素和可变形外形对于下一代先进显示器至关重要。在此，我们展示了用于超薄可穿戴显示器的超高分辨率全彩钙钛矿纳米晶体（PeNC）图案化技术。我们开发了PeNC和有机电荷传输层的双层转移印刷技术，该技术可防止在转移印刷过程中PeNC膜内部出现裂纹。这使得能够实现每英寸2550像素（PPI）的RGB像素化PeNC图案以及每英寸33,000线对的单色图案，转移产率达100%。具有转移印刷有源层的钙钛矿发光二极管（PeLED）展现出出色的电致发光特性，具有显著的外量子效率（红色、绿色和蓝色分别为15.3%、14.8%和2.5%），与迄今报道的印刷PeLED相比处于较高水平。此外，双层转移印刷能够制造出超薄多色PeLED，其可以在包括人体皮肤在内的各种机械变形下的曲线表面上工作。这些结果突出表明，PeLED在高清全彩可穿戴显示器方面具有广阔前景。
