Kumar Gautham, Lin Chien-Chung, Kuo Hao-Chung, Chen Fang-Chung
Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan
Graduate Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University Taipei 10617 Taiwan.
Nanoscale Adv. 2024 Jan 19;6(3):782-791. doi: 10.1039/d3na01078c. eCollection 2024 Jan 30.
Perovskite quantum dots (QDs) are considered as promising materials for numerous optoelectronic applications due to their narrow emission spectra, high color purity, high photoluminescence quantum yields (PLQYs), and cost-effectiveness. Herein, we synthesized various types of perovskite QDs and incorporated Au nanoparticles (NPs) to systematically investigate the impact of plasmonic effects on the photoluminescence performance of perovskite QDs. The PLQYs of the QDs are enhanced effectively upon the inclusion of Au NPs in the solutions, with an impressive PLQY approaching 99% achieved. The PL measurements reveal that the primary mechanism behind the PL improvement is the accelerated rate of radiative recombination. Furthermore, we integrate perovskite QDs and Au NPs, which function as color conversion layers, with blue light-emitting diodes (LEDs), achieving a remarkable efficiency of 140.6 lm W. Additionally, we prepare photopatternable thin films of perovskite QDs using photocrosslinkable polymers as the matrix. Microscale patterning of the thin films is accomplished, indicating that the addition of plasmonic NPs does not adversely affect their photopatternable properties. Overall, our research not only elucidates the underlying mechanisms of plasmonic effects on perovskite QDs but presents a practical method for enhancing their optical performance, paving the way for next-generation optoelectronic applications, including high-definition micro-LED panels.
钙钛矿量子点（QDs）因其窄发射光谱、高色纯度、高光致发光量子产率（PLQYs）和成本效益，被认为是众多光电子应用的有前途的材料。在此，我们合成了各种类型的钙钛矿量子点，并引入了金纳米颗粒（NPs），以系统地研究等离子体效应对钙钛矿量子点光致发光性能的影响。当在溶液中加入金纳米颗粒时，量子点的PLQYs得到有效提高，实现了接近99%的令人印象深刻的PLQY。PL测量表明，PL改善背后的主要机制是辐射复合速率的加快。此外，我们将作为颜色转换层的钙钛矿量子点和金纳米颗粒与蓝光发光二极管（LED）集成，实现了140.6 lm W的显著效率。此外，我们使用可光交联聚合物作为基质制备了钙钛矿量子点的可光图案化薄膜。完成了薄膜的微尺度图案化，表明等离子体纳米颗粒的添加不会对其可光图案化性能产生不利影响。总体而言，我们的研究不仅阐明了等离子体效应在钙钛矿量子点上的潜在机制，还提出了一种提高其光学性能的实用方法，为包括高清微发光二极管面板在内的下一代光电子应用铺平了道路。
