DataVXAdvanced MaterialsPaper
journal article·2023-12

Highly Efficient Light‐Emitting Diodes Based on Self‐Assembled Colloidal Quantum Wells

Yunke Zhu, Yunzhou Deng, Peng Bai, Xinan Wu, Yige Yao, Qinyun Liu, Jingjing Qiu, An Hu, Zhenyu Tang, Wenjin Yu, Yaolong Li, Pengzuo Jiang, Zhetong Liu, Peng Gao, Yanlei Hao, Wangxiao Jin, Desui Chen, Xitong Zhu, Yizheng Jin, Yunan Gao

Advanced Materials· Volume 35· Issue 49
Publisher page
Source abstract

Abstract

Abstract Nanocrystal‐based light‐emitting diodes (Nc‐LEDs) have immense potential for next‐generation high‐definition displays and lighting applications. They offer numerous advantages, such as low cost, high luminous efficiency, narrow emission, and long lifetime. However, the external quantum efficiency (EQE) of Nc‐LEDs, typically employing isotropic nanocrystals, is limited by the out‐coupling factor. Here efficient, bright, and long lifetime red Nc‐LEDs based on anisotropic nanocrystals of colloidal quantum wells (CQWs) are demonstrated. Through modification of the substrate's surface properties and control of the interactions among CQWs, a self‐assembled layer with an exceptionally high distribution of in‐plane transitions dipole moment of 95%, resulting in an out‐coupling factor of 37% is successfully spin‐coated. The devices exhibit a remarkable peak EQE of 26.9%, accompanied by a maximum brightness of 55 754 cd m−2 and a long operational lifetime (T95@100 cd m−2) over 15 000 h. These achievements represent a significant advancement compared to previous studies on Nc‐LEDs incorporating anisotropic nanocrystals. The work is expected to provide a general self‐assembly strategy for enhancing the light extraction efficiency of Nc‐LEDs based on anisotropic nanocrystals.
Source: crossref · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Nanocluster Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano‐Optoelectronics School of Physics Peking University Beijing 100871 China

State Key Laboratory of Modern Optical Instrumentation College of Optical Science and Engineering International Research Center for Advanced Photonics Zhejiang University Hangzhou 310027 China

Cavendish Laboratory University of Cambridge Cambridge CB3 0HE UK

Electron Microscopy Laboratory School of Physics Peking University Beijing 100871 China

Key Laboratory of Excited‐State Materials of Zhejiang Province State Key Laboratory of Silicon and Advanced Semiconductor Materials Department of Chemistry Zhejiang University Hangzhou 310027 China

Peking University Yangtze Delta Instituteof Optoelectronics Peking University Nantong 226010 China

Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality · Fundamental Research Funds for the Central Universities

References (50)

Show source-provided references
1. 10.1038/s41586-019-1771-510.1038/s41586-019-1771-5 ↗
2. 10.1038/s41586-020-2791-x10.1038/s41586-020-2791-x ↗
3. 10.1038/s41566-022-00999-910.1038/s41566-022-00999-9 ↗
4. 10.1038/nphoton.2013.7010.1038/nphoton.2013.70 ↗
5. 10.1038/nature1382910.1038/nature13829 ↗
6. 10.1002/adma.20180138710.1002/adma.201801387 ↗
7. 10.1002/adma.20200617810.1002/adma.202006178 ↗
8. 10.1002/adfm.20190726510.1002/adfm.201907265 ↗
9. 10.1038/s41467-020-14756-510.1038/s41467-020-14756-5 ↗
10. 10.1002/smll.20180485410.1002/smll.201804854 ↗
11. 10.1038/s41566-019-0364-z10.1038/s41566-019-0364-z ↗
12. 10.1038/s41578-020-00274-910.1038/s41578-020-00274-9 ↗
13. 10.1002/adfm.20180837710.1002/adfm.201808377 ↗
14. 10.1038/s41467-018-04986-z10.1038/s41467-018-04986-z ↗
15. 10.1021/acs.chemrev.2c0069510.1021/acs.chemrev.2c00695 ↗
16. 10.1021/acs.chemmater.8b0536610.1021/acs.chemmater.8b05366 ↗
17. 10.1016/j.orgel.2011.02.00510.1016/j.orgel.2011.02.005 ↗
18. 10.1002/pssa.20122832010.1002/pssa.201228320 ↗
19. 10.1021/acs.jpclett.0c0074810.1021/acs.jpclett.0c00748 ↗
20. 10.1021/acs.nanolett.0c0215310.1021/acs.nanolett.0c02153 ↗
21. 10.1021/acs.jpclett.2c0263310.1021/acs.jpclett.2c02633 ↗
22. 10.1038/nmat314510.1038/nmat3145 ↗
23. 10.1038/nnano.2017.17710.1038/nnano.2017.177 ↗
24. 10.1021/acs.nanolett.7b0123710.1021/acs.nanolett.7b01237 ↗
25. 10.1021/acsphotonics.7b0147510.1021/acsphotonics.7b01475 ↗
26. 10.1002/adma.20190582410.1002/adma.201905824 ↗
27. 10.1021/acsnano.9b0531310.1021/acsnano.9b05313 ↗
28. 10.1021/acsnano.2c0296710.1021/acsnano.2c02967 ↗
29. 10.1002/smll.20210611510.1002/smll.202106115 ↗
30. 10.1021/acs.nanolett.8b0045610.1021/acs.nanolett.8b00456 ↗
31. 10.1021/acs.chemmater.2c0216410.1021/acs.chemmater.2c02164 ↗
32. 10.1002/smll.20220412010.1002/smll.202204120 ↗
33. 10.1002/adfm.20130171110.1002/adfm.201301711 ↗
34. 10.1002/smll.20220658210.1002/smll.202206582 ↗
35. 10.1002/adma.20170560010.1002/adma.201705600 ↗
36. 10.1002/adma.20140140710.1002/adma.201401407 ↗
37. 10.1002/adma.20160167510.1002/adma.201601675 ↗
38. 10.1002/adfm.20190102510.1002/adfm.201901025 ↗
39. 10.1021/acs.chemmater.6b0342810.1021/acs.chemmater.6b03428 ↗
40. 10.1002/adom.20150014110.1002/adom.201500141 ↗
41. 10.1021/acsnano.9b0496710.1021/acsnano.9b04967 ↗
42. 10.1021/acs.chemmater.9b0422010.1021/acs.chemmater.9b04220 ↗
43. 10.1021/acs.nanolett.9b0068110.1021/acs.nanolett.9b00681 ↗
44. 10.1021/acs.nanolett.9b0527010.1021/acs.nanolett.9b05270 ↗
45. 10.1002/aelm.20200096510.1002/aelm.202000965 ↗
46. 10.1016/j.nanoen.2018.02.00410.1016/j.nanoen.2018.02.004 ↗
47. 10.1364/JOSAB.21.00121010.1364/JOSAB.21.001210 ↗
48. 10.1038/nnano.2013.2010.1038/nnano.2013.20 ↗
49. 10.1038/s41467-019-11225-610.1038/s41467-019-11225-6 ↗
50. 10.1002/adma.20210627610.1002/adma.202106276 ↗