DataVXACS Energy LettersPaper
journal article·2026-06-24

Revealing the Atomic-Scale Mechanism of Performance Enhancement in Organically Passivated Perovskite Light-Emitting Diodes

Jingshu Zhang, Jianfeng Ou, Zixi Shen, Ziyang Huang, Lei Li, Shuangfeng Jia, Zunyu Liu, Shuwen Yan, Lei Ma, Zhe Wang, Yihua Gao, Jianbo Wang, Jiajun Luo, Luying Li, Jiang Tang

ACS Energy Letters
Publisher page
Source abstract

Abstract

Thermally evaporated perovskite light-emitting diodes (PeLEDs) are attractive for scalable display manufacturing but remain limited by grain-boundary defects and residual strain. Here, we identify how a Lewis base passivator, PPF, reconstructs grain boundaries in evaporated CsPbBr 3 through coordination between P═O groups and undercoordinated Pb 2+ sites. PPF relaxes grain-boundary tensile strain from 3.25 to 0.18% and reshapes the local projected electric field, leading to reduced defect-assisted nonradiative recombination and improved carrier injection. As a result, the PeLEDs deliver an external quantum efficiency of 17.6% and a T 50 of 66.7 min at an initial luminance of 1000 cd m −2, compared with 8.8% and 16.2 min for control devices. These results establish a direct structure-field-performance correlation for vapor-deposited perovskites and provide guidance for evaporated perovskite optoelectronics.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Optical properties and cooling technologies in crystalline materials

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

Affiliations

Wuhan National Laboratory for Optoelectronics (WNLO) & School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan 430074, P. R. China

Center for Electron Microscopy, MOE Key Laboratory of Artificial Micro- and Nano-Structures and the Institute for Advanced Studies, School of Physics and Technology

Wuhan University

School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Luoyu Road 1037, Wuhan 430074, P. R. China

Funding

National Key Research and Development Program of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology

References (30)

Show source-provided references
1. 10.1038/s41578-024-00651-810.1038/s41578-024-00651-8 ↗
2. 10.1016/j.device.2024.10054910.1016/j.device.2024.100549 ↗
3. 10.1038/s41467-021-25093-610.1038/s41467-021-25093-6 ↗
4. 10.1038/s41467-025-62282-z10.1038/s41467-025-62282-z ↗
5. 10.1038/s41578-022-00459-410.1038/s41578-022-00459-4 ↗
6. 10.1021/acs.chemrev.9b0010710.1021/acs.chemrev.9b00107 ↗
7. 10.1021/acsenergylett.7b0023610.1021/acsenergylett.7b00236 ↗
8. 10.1038/s41377-021-00524-710.1038/s41377-021-00524-7 ↗
9. 10.1093/nsr/nwab04710.1093/nsr/nwab047 ↗
10. 10.1039/d2cs00278g10.1039/d2cs00278g ↗
11. 10.1002/adma.20251647010.1002/adma.202516470 ↗
12. 10.1038/s41377-025-01740-110.1038/s41377-025-01740-1 ↗
13. 10.1038/s41467-024-53014-w10.1038/s41467-024-53014-w ↗
14. 10.1038/s41560-022-01096-510.1038/s41560-022-01096-5 ↗
15. 10.1126/sciadv.adu345910.1126/sciadv.adu3459 ↗
16. 10.1021/ol061412110.1021/ol0614121 ↗
17. 10.1038/s41566-023-01177-110.1038/s41566-023-01177-1 ↗
18. 10.1038/s41586-021-03997-z10.1038/s41586-021-03997-z ↗
19. 10.1002/advs.20251867610.1002/advs.202518676 ↗
20. 10.1038/s41563-021-01097-x10.1038/s41563-021-01097-x ↗
21. 10.1038/336565a010.1038/336565a0 ↗
22. 10.1016/j.ultramic.2016.08.01810.1016/j.ultramic.2016.08.018 ↗
23. 10.1038/s41467-019-08507-410.1038/s41467-019-08507-4 ↗
24. 10.1038/s41467-024-47019-810.1038/s41467-024-47019-8 ↗
25. 10.1016/j.ultramic.2013.12.00410.1016/j.ultramic.2013.12.004 ↗
26. 10.1038/NPHYS235710.1038/NPHYS2357 ↗
27. 10.1021/acs.jpclett.6b0094610.1021/acs.jpclett.6b00946 ↗
28. 10.1126/science.aaa576010.1126/science.aaa5760 ↗
29. 10.1002/adma.20251278810.1002/adma.202512788 ↗
30. 10.1021/acsenergylett.5c0374010.1021/acsenergylett.5c03740 ↗