Structural Engineering for Efficient Transparent Vacuum-Deposited Perovskite Light-Emitting Diodes toward Intelligent Display

Xiang Zhang; Jinghui Li; Peipei Du; Zixi Shen; Hao Chen; Haozhi Wang; Nian Liu; Junhu Cai; Jiajun Luo; Enguo Chen

doi:10.1021/acsami.4c09719

Structural Engineering for Efficient Transparent Vacuum-Deposited Perovskite Light-Emitting Diodes toward Intelligent Display

ACS Appl Mater Interfaces. 2024 Nov 27. doi: 10.1021/acsami.4c09719. Online ahead of print.

Authors

Xiang Zhang^{1

2}, Jinghui Li^{1

3}, Peipei Du⁴, Zixi Shen¹, Hao Chen², Haozhi Wang⁵, Nian Liu¹, Junhu Cai², Jiajun Luo¹, Enguo Chen²

Affiliations

¹ Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China.
² National & Local United Engineering Laboratory of Flat Panel Display Technology College of Physics and Information Engineering, Fuzhou University, Fuzhou, Fujian 350108, China.
³ School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.
⁴ Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education) and School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, Hubei 430056, China.
⁵ State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, P. R. China.

PMID: 39602239
DOI: 10.1021/acsami.4c09719

Abstract

Perovskite light-emitting diodes (PeLEDs) have attracted significant interest in next-generation intelligent displays. Vacuum deposition is a promising method for integrating PeLEDs into intelligent displays due to its high manufacturability and easy pixelation, as proven in industrial organic light-emitting diode production. However, achieving spatially confined grains with optimized crystal remains challenging in vacuum-deposited perovskite. Here, a trisource coevaporation strategy is proposed to introduce MABr to form the MA_xCs_1-xPbBr₃ structure with carriers' spatial confinement and defect suppression as well. This approach enables PeLEDs to contain excellent external quantum efficiency (EQE), which is nearly 10-fold as the untreated device. Based on this, we realize the first reported vacuum-deposited transparent PeLEDs with double-sided emission and an amazing maximum EQE of 7.6% by replacing Al with an optimized Ag:Mg electrode. These transparent PeLEDs are integrated into a bifunctional intelligent display device with both accurate heart rate detection and imaging display, which exhibit bright patterned emission and accurate heart rate detection.

Keywords: intelligent display; metal halide perovskite; structural engineering; transparent perovskite light-emitting diodes; vacuum deposition.