基于混合卤素准二维钙钛矿的蓝光发光二极管任务书
2020-05-01 08:49:12
1. 毕业设计(论文)的内容和要求
本论文以钙钛矿蓝光发光二极管(blue perovksite light-emitting diode, blue -peled)为研究对象,针对目前blue-peled器件性能(色度,外量子效率,亮度)相对于同系列的绿光、红光和近红外器件性能普遍偏低的问题,通过新材料制备、新工艺探索,器件结构优化等手段,提高器件性能并对其提高的原理进行探索。
本论文的研究课题为”基于混合卤素准二维钙钛矿的蓝光发光二极管”。
钙钛矿材料具有原料价格低廉、制备工艺简单、发光波长连续可调、载流子迁移率高等优点,在绿光、红光和近红外波段的外量子效率均已超过20%,但是在蓝光波段的性能还比较低。
2. 参考文献
[1] SHANG Y, LI G, LIU W, et al. Quasi-2D Inorganic CsPbBr3 Perovskite for Efficient and Stable Light-Emitting Diodes [J]. Advanced Functional Materials, 2018, 28(22): 1801193. [2] KUMAWAT N K, LIU X K, KABRA D, et al. Blue perovskite light-emitting diodes: progress, challenges and future directions [J]. Nanoscale, 2019, 11(5): 2109-20. [3] PROTESESCU L, YAKUNIN S, BODNARCHUK M I, et al. Nanocrystals of Cesium Lead Halide Perovskites (CsPbX(3), X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut [J]. Nano letters, 2015, 15(6): 3692-6. [4] KOSCHER B A, SWABECK J K, BRONSTEIN N D, et al. Essentially Trap-Free CsPbBr3 Colloidal Nanocrystals by Postsynthetic Thiocyanate Surface Treatment [J]. Journal of the American Chemical Society, 2017, 139(19): 6566-9. [5] YANG D, ZOU Y, LI P, et al. Large-scale synthesis of ultrathin cesium lead bromide perovskite nanoplates with precisely tunable dimensions and their application in blue light-emitting diodes [J]. Nano Energy, 2018, 47(235-42. [6] SONG J, LI J, LI X, et al. Quantum Dot Light-Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3) [J]. Advanced Materials, 2015, 27(44): 7162-7. [7] LIN K, XING J, QUAN L N, et al. Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent [J]. Nature, 2018, 562(7726): 245-8. [8] CHIBA T, HAYASHI Y, EBE H, et al. Anion-exchange red perovskite quantum dots with ammonium iodine salts for highly efficient light-emitting devices [J]. Nature Photonics, 2018, 12(11): 681-7. [9] CAO Y, WANG N, TIAN H, et al. Perovskite light-emitting diodes based on spontaneously formed submicrometre-scale structures [J]. Nature, 2018, 562(7726): 249-53. [10] XING J, ZHAO Y, ASKERKA M, et al. Color-stable highly luminescent sky-blue perovskite light-emitting diodes [J]. Nature communications, 2018, 9(1): 3541. [11] WANG N, CHENG L, GE R, et al. Perovskite light-emitting diodes based on solution-processed self-organized multiple quantum wells [J]. Nature Photonics, 2016, 10(11): 699-704. [12] KUMAR S, JAGIELSKI J, YAKUNIN S, et al. Efficient Blue Electroluminescence Using Quantum-Confined Two-Dimensional Perovskites [J]. ACS Nano, 2016, 10(10): 9720-9. [13] ZHANG X, SUN C, ZHANG Y, et al. Bright Perovskite Nanocrystal Films for Efficient Light-Emitting Devices [J]. The Journal of Physical Chemistry Letters, 2016, 7(22): 4602-10. [14] WANG Q, REN J, PENG X-F, et al. Efficient Sky-Blue Perovskite Light-Emitting Devices Based on Ethylammonium Bromide Induced Layered Perovskites [J]. ACS Applied Materials Interfaces, 2017, 9(35): 29901-6. [15] YAO E P, YANG Z, MENG L, et al. High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites [J]. Adv Mater, 2017, 29(23).
3. 毕业设计(论文)进程安排
日期 论文各阶段实验内容 2018.12.22-2019.01.05 查阅文献,了解课题背景 2019.01.06-2019.01.12 文献阅读,英文文献翻译 2019.01.13-2019.01.24 设计实验方案并完成开题报告 2019.03.11-2019.03.24 熟悉薄膜、器件制备流程,取得仪器的使用权限 2019.03.25-2019.04.07 不同有机铵盐配体准二维钙钛矿薄膜的制备与表征 2019.04.08-2019.04.14 不同氯源的三维钙钛矿薄膜的制备与表征 2019.04.15-2019.04.28 混合卤素准二维钙钛矿薄膜的制备与表征 2019.04.29-2019.05.12 器件制备-混合卤素准二维钙钛矿组分优化 2019.05.13-2019.05.19 器件制备-退火以及厚度优化 2019.05.20-2019.05.22 器件表征-稳定性,重复性测试 2019.05.23-2019.05.28 数据整理,分析 2019.05.29-2019.06.10 撰写论文,修改 2019.06.11-2019.06.14 论文答辩