Hahm Donghyo, Lim Jaemin, Kim Hyeokjun, Shin Jin-Wook, Hwang Seongkwon, Rhee Seunghyun, Chang Jun Hyuk, Yang Jeehye, Lim Chang Hyeok, Jo Hyunwoo, Choi Beomgyu, Cho Nam Sung, Park Young-Shin, Lee Doh C, Hwang Euyheon, Chung Seungjun, Kang Chan-Mo, Kang Moon Sung, Bae Wan Ki
SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon, Republic of Korea.
Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, Republic of Korea.
Nat Nanotechnol. 2022 Sep;17(9):952-958. doi: 10.1038/s41565-022-01182-5. Epub 2022 Aug 11.
Colloidal quantum dots (QDs) stand at the forefront of a variety of photonic applications given their narrow spectral bandwidth and near-unity luminescence efficiency. However, integrating luminescent QD films into photonic devices without compromising their optical or transport characteristics remains challenging. Here we devise a dual-ligand passivation system comprising photocrosslinkable ligands and dispersing ligands to enable QDs to be universally compatible with solution-based patterning techniques. The successful control over the structure of both ligands allows the direct patterning of dual-ligand QDs on various substrates using commercialized photolithography (i-line) or inkjet printing systems at a resolution up to 15,000 pixels per inch without compromising the optical properties of the QDs or the optoelectronic performance of the device. We demonstrate the capabilities of our approach for QD-LED applications. Our approach offers a versatile way of creating various structures of luminescent QDs in a cost-effective and non-destructive manner, and could be implemented in nearly all commercial photonics applications where QDs are used.
胶体量子点（QDs）因其窄光谱带宽和近乎单位的发光效率，在各种光子应用中处于前沿地位。然而，将发光量子点薄膜集成到光子器件中而不损害其光学或传输特性仍然具有挑战性。在这里，我们设计了一种双配体钝化系统，该系统由可光交联配体和分散配体组成，以使量子点能够普遍适用于基于溶液的图案化技术。对两种配体结构的成功控制使得双配体量子点能够使用商业化光刻（i线）或喷墨打印系统，以高达每英寸15000像素的分辨率直接在各种基板上进行图案化，而不会损害量子点的光学性质或器件的光电性能。我们展示了我们的方法在量子点发光二极管（QD-LED）应用中的能力。我们的方法提供了一种以经济高效且无损的方式创建各种发光量子点结构的通用方法，并且可以在几乎所有使用量子点的商业光子应用中实现。
