DataVXAdvanced MaterialsPaper
journal article·2019-08Open access

Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides

Chong Wang, Yanan Wang, Xinghua Su, Viktor G. Hadjiev, Shenyu Dai, Zhaojun Qin, Hector A. Calderon Benavides, Yizhou Ni, Qiang Li, Jie Jian, Md. Kamrul Alam, Haiyan Wang, Francisco C. Robles Hernandez, Yan Yao, Shuo Chen, Qingkai Yu, Guoying Feng, Zhiming Wang, Jiming Bao

Advanced Materials· Volume 31· Issue 33
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Source abstract

Abstract

Abstract Since the first report of the green emission of 2D all‐inorganic CsPb2Br5, its bandgap and photoluminescence (PL) origin have generated intense debate and remained controversial. After the discovery that PL centers occupy only specific morphological structures in CsPb2Br5, a two‐step highly sensitive and noninvasive optical technique is employed to resolve the controversy. Same‐spot Raman‐PL as a static property–structure probe reveals that CsPbBr3 nanocrystals are contributing to the green emission of CsPb2Br5; pressure‐dependent Raman‐PL with a diamond anvil cell as a dynamic probe further rules out point defects such as Br vacancies as an alternative mechanism. Optical absorption under hydrostatic pressure shows that the bandgap of CsPb2Br5 is 0.3–0.4 eV higher than previously reported values and remains nearly constant with pressure up to 2 GPa in good agreement with full‐fledged density functional theory (DFT) calculations. Using ion exchange of Br with Cl and I, it is further proved that CsPbBr3−x Xx (X = Cl or I) is responsible for the strong visible PL in CsPb2Br5−x Xx . This experimental approach is applicable to all PL‐active materials to distinguish intrinsic defects from extrinsic nanocrystals, and the findings pave the way for new design and development of highly efficient optoelectronic devices based on all‐inorganic lead halides.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Optical properties and cooling technologies in crystalline materials · 2D Materials and Applications

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

Affiliations

School of Materials Science and Engineering Yunnan University Kunming Yunnan 650500 China

Department of Electrical and Computer Engineering University of Houston Houston TX 77204 USA

Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu Sichuan 610054 China

School of Materials Science and Engineering Chang'an University Xi'an Shaanxi 710061 China

Texas Center for Superconductivity University of Houston Houston TX 77204 USA

Department of Mechanical Engineering University of Houston Houston TX 77204 USA

College of Electronics and Information Engineering Sichuan University Chengdu Sichuan 610064 China

Instituto Politecnico Nacional ESFM‐IPN UPALM Departamento de Física Mexico CDMX 07338 Mexico

Department of Physics University of Houston Houston TX 77204 USA

Department of Materials Engineering Purdue University West Lafayette IN 47907 USA

Materials Science and Engineering University of Houston Houston TX 77204 USA

Mechanical Engineering Technology University of Houston Houston TX 77204 USA

Ingram School of Engineering Texas State University San Marcos TX 78666 USA

Funding

National Natural Science Foundation of China · Welch Foundation · U.S. Department of Energy · Office of Naval Research

References (61)

Show source-provided references
1. 10.1126/science.aac766010.1126/science.aac7660 ↗
2. 10.1021/acs.chemmater.6b0084710.1021/acs.chemmater.6b00847 ↗
3. 10.1038/nature1830610.1038/nature18306 ↗
4. 10.1021/jacs.8b0054210.1021/jacs.8b00542 ↗
5. 10.1039/C4CS00458B10.1039/C4CS00458B ↗
6. 10.1038/natrevmats.2017.4210.1038/natrevmats.2017.42 ↗
7. 10.1002/aenm.20170049110.1002/aenm.201700491 ↗
8. 10.1126/science.aal421110.1126/science.aal4211 ↗
9. 10.1021/acs.nanolett.8b0207810.1021/acs.nanolett.8b02078 ↗
10. 10.1021/acsnano.8b0763110.1021/acsnano.8b07631 ↗
11. 10.1021/nl504877910.1021/nl5048779 ↗
12. 10.1021/cg400645t10.1021/cg400645t ↗
13. 10.1021/jacs.7b0140910.1021/jacs.7b01409 ↗
14. 10.1002/anie.20150827610.1002/anie.201508276 ↗
15. 10.1021/acs.nanolett.5b0240410.1021/acs.nanolett.5b02404 ↗
16. 10.1021/acs.chemmater.7b0283410.1021/acs.chemmater.7b02834 ↗
17. 10.1021/acs.jpcc.8b0134310.1021/acs.jpcc.8b01343 ↗
18. 10.1023/A:102283680082010.1023/A:1022836800820 ↗
19. 10.1002/anie.20160278710.1002/anie.201602787 ↗
20. 10.1002/adom.20160078810.1002/adom.201600788 ↗
21. 10.1021/acs.jpclett.7b0165710.1021/acs.jpclett.7b01657 ↗
22. 10.1016/j.matlet.2017.08.07910.1016/j.matlet.2017.08.079 ↗
23. 10.1021/acs.jpclett.7b0237110.1021/acs.jpclett.7b02371 ↗
24. 10.1016/j.matlet.2017.09.10610.1016/j.matlet.2017.09.106 ↗
25. 10.1364/PRJ.5.00047310.1364/PRJ.5.000473 ↗
26. 10.1016/j.materresbull.2018.04.02810.1016/j.materresbull.2018.04.028 ↗
27. 10.1039/C4CP03573A10.1039/C4CP03573A ↗
28. 10.1039/C6CC05877A10.1039/C6CC05877A ↗
29. 10.1039/C8CE02191K10.1039/C8CE02191K ↗
30. 10.1039/C7TC04834C10.1039/C7TC04834C ↗
31. 10.1002/cssc.20170113110.1002/cssc.201701131 ↗
32. 10.1039/C8NR09349K10.1039/C8NR09349K ↗
33. 10.1039/C8NR10110H10.1039/C8NR10110H ↗
34. 10.1021/acs.jpcc.7b0338910.1021/acs.jpcc.7b03389 ↗
35. 10.1088/1361-6528/aa892e10.1088/1361-6528/aa892e ↗
36. 10.1021/acs.chemmater.7b0414210.1021/acs.chemmater.7b04142 ↗
37. 10.1002/smll.20160399610.1002/smll.201603996 ↗
38. 10.1007/s40820-019-0254-410.1007/s40820-019-0254-4 ↗
39. 10.1039/C7RA10693A10.1039/C7RA10693A ↗
40. 10.1016/j.jallcom.2019.02.01810.1016/j.jallcom.2019.02.018 ↗
41. 10.1039/C8NR00883C10.1039/C8NR00883C ↗
42. 10.1021/nl072921e10.1021/nl072921e ↗
43. 10.1126/science.aaa576010.1126/science.aaa5760 ↗
44. 10.1088/1361-648X/aadeb410.1088/1361-648X/aadeb4 ↗
45. 10.1021/acs.jpclett.6b0276310.1021/acs.jpclett.6b02763 ↗
46. 10.1103/PhysRevLett.118.13600110.1103/PhysRevLett.118.136001 ↗
47. 10.1103/PhysRevB.88.02430510.1103/PhysRevB.88.024305 ↗
48. 10.1016/j.micron.2014.08.00710.1016/j.micron.2014.08.007 ↗
49. 10.1021/acsenergylett.6b0039610.1021/acsenergylett.6b00396 ↗
50. 10.1021/jacs.7b0526010.1021/jacs.7b05260 ↗
51. 10.1021/acs.jpclett.7b0157710.1021/acs.jpclett.7b01577 ↗
52. 10.1088/1361-648X/aa8f7910.1088/1361-648X/aa8f79 ↗
53. 10.1063/1.156406010.1063/1.1564060 ↗
54. 10.1002/pssb.222198012210.1002/pssb.2221980122 ↗
55. 10.1021/acsnano.8b0297010.1021/acsnano.8b02970 ↗
56. 10.1016/j.ssc.2014.09.02610.1016/j.ssc.2014.09.026 ↗
57. 10.1063/1.470436710.1063/1.4704367 ↗
58. 10.1002/pssb.222181011810.1002/pssb.2221810118 ↗
59. 10.1063/1.36869310.1063/1.368693 ↗
60. 10.1021/acs.inorgchem.7b0120410.1021/acs.inorgchem.7b01204 ↗
61. 10.1063/1.220459710.1063/1.2204597 ↗