journal article·2022-12-09

Low-Voltage Driving Copper Iodide-Based Broadband Electroluminescence

Rui Xu, Dingshuo Zhang, Junjie Si, Yihang Du, Qianqing Hu, Xiaoming Hao, Hong Zhao, Peiqing Cai, Qi Ai, Xin Yao, Yun Gao, Meiyi Zhu, Zenan Zhang, Muzhi Cai, Hin Wai Mo, Kentaro Harada, Zhizhen Ye, Xingliang Dai, Chihaya Adachi, Zugang Liu

ACS Energy Letters· Volume 7· Issue 12
Publisher page

Abstract

White light-emitting diodes (WLEDs) based on copper iodides have attracted tremendous interest due to their broad emission and environmentally friendly nature. Cesium copper iodide is usually regarded as the emissive center in this type of LED. Here, we reveal that it is the in situ formed copper iodide complex, generated during the deposition of the electron transporting layer on cesium copper iodide films, that dominates the electroluminescence. It is also found that the narrow bandgap and widely distributed band-edge states of the complex facilitate the hole injection, resulting in low-voltage driving. Combining a modified hole injection layer to suppress the interfacial exciton quenching, an efficient broadband LED with a turn-on voltage of 2.3 V and a peak EQE of 4.6% was achieved. The driving voltages at 100 and 1000 cd m–2 are 2.9 and 4.9 V, respectively, both of which are the lowest among all reported Cu(I) complex-based broadband WLEDs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Gas Sensing Nanomaterials and Sensors · Semiconductor materials and devices

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

Affiliations

College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, P. R. China

School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China

Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials, Institute of Wenzhou, Zhejiang University, Wenzhou 325006, China

Fukuoka i3-Center for Organic Photonics and Electronics Research (i3-opera), 5-14 Kyudai-shimmachi, Nishi, Fukuoka 819-0388, Japan

Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan

Funding

China Association for Science and Technology · Science and Technology Department of Zhejiang Province · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province

References (53)

Show source-provided references
1. 10.1039/b204301g10.1039/b204301g ↗
2. 10.1063/1.180850110.1063/1.1808501 ↗
3. 10.1002/adma.20140496710.1002/adma.201404967 ↗
4. 10.1002/adma.20190695010.1002/adma.201906950 ↗
5. 10.1021/acsenergylett.0c0093110.1021/acsenergylett.0c00931 ↗
6. 10.1038/s41566-020-00743-110.1038/s41566-020-00743-1 ↗
7. 10.1021/acs.jpclett.6b0268210.1021/acs.jpclett.6b02682 ↗
8. 10.1039/C7TA04690A10.1039/C7TA04690A ↗
9. 10.1021/acsphotonics.7b0083710.1021/acsphotonics.7b00837 ↗
10. 10.1038/s41586-018-0691-010.1038/s41586-018-0691-0 ↗
11. 10.1002/adma.20180454710.1002/adma.201804547 ↗
12. 10.1002/adma.20190507910.1002/adma.201905079 ↗
13. 10.1021/acsmaterialslett.9b0027410.1021/acsmaterialslett.9b00274 ↗
14. 10.1002/ange.20190912910.1002/ange.201909129 ↗
15. 10.1021/acsenergylett.9b0127410.1021/acsenergylett.9b01274 ↗
16. 10.1021/ja507086b10.1021/ja507086b ↗
17. 10.1021/acs.jpclett.6b0079310.1021/acs.jpclett.6b00793 ↗
18. 10.1063/1.512730010.1063/1.5127300 ↗
19. 10.1021/acsaelm.9b0001510.1021/acsaelm.9b00015 ↗
20. 10.1021/acsami.0c1455710.1021/acsami.0c14557 ↗
21. 10.1002/adom.20190172310.1002/adom.201901723 ↗
22. 10.1002/lpor.20200002710.1002/lpor.202000027 ↗
23. 10.1021/acs.chemmater.0c0246310.1021/acs.chemmater.0c02463 ↗
24. 10.1039/D0TC01519A10.1039/D0TC01519A ↗
25. 10.1002/adpr.20200015810.1002/adpr.202000158 ↗
26. 10.1021/acs.nanolett.0c0051310.1021/acs.nanolett.0c00513 ↗
27. 10.1021/acsnano.9b1014810.1021/acsnano.9b10148 ↗
28. 10.1002/adma.20200136710.1002/adma.202001367 ↗
29. 10.1021/acsenergylett.1c0111710.1021/acsenergylett.1c01117 ↗
30. 10.1038/s41467-021-21638-x10.1038/s41467-021-21638-x ↗
31. 10.1002/advs.20210289510.1002/advs.202102895 ↗
32. 10.1021/acs.jpclett.2c0074010.1021/acs.jpclett.2c00740 ↗
33. 10.1038/s41467-018-04986-z10.1038/s41467-018-04986-z ↗
34. 10.1002/adma.20030641410.1002/adma.200306414 ↗
35. 10.1021/ja508155x10.1021/ja508155x ↗
36. 10.1002/adma.20160048710.1002/adma.201600487 ↗
37. 10.1021/jacs.8b1239710.1021/jacs.8b12397 ↗
38. 10.1126/science.aav286510.1126/science.aav2865 ↗
39. 10.1002/adfm.20140068510.1002/adfm.201400685 ↗
40. 10.1021/acs.chemmater.7b0144310.1021/acs.chemmater.7b01443 ↗
41. 10.1016/j.dyepig.2017.04.03610.1016/j.dyepig.2017.04.036 ↗
42. 10.1002/adom.20180161210.1002/adom.201801612 ↗
43. 10.3390/mi1212150010.3390/mi12121500 ↗
44. 10.1021/ja106565310.1021/ja1065653 ↗
45. 10.1021/jacs.5b0484010.1021/jacs.5b04840 ↗
46. 10.1126/sciadv.aav985710.1126/sciadv.aav9857 ↗
47. 10.1021/acsenergylett.1c0099310.1021/acsenergylett.1c00993 ↗
48. 10.1016/j.jssc.2004.05.00410.1016/j.jssc.2004.05.004 ↗
49. 10.1021/jacs.7b0455010.1021/jacs.7b04550 ↗
50. 10.1021/acs.jpclett.6b0103910.1021/acs.jpclett.6b01039 ↗
51. 10.1038/s41467-022-28037-w10.1038/s41467-022-28037-w ↗
52. 10.1088/0268-1242/10/12/02010.1088/0268-1242/10/12/020 ↗
53. 10.1021/ja411014k10.1021/ja411014k ↗