Vacuum-Assisted Preparation of High-Quality Quasi-2D Perovskite Thin Films for Large-Area Light-Emitting Diodes

Chen, Chaoran1; Zeng, Linxiang1,2; Jiang, Zhengyan3,4; Xu, Zhenhua1; Chen, Yijun1; Wang, Zhen1; Chen, Shi3,4; Xu, Baomin3,4; Mai, Yaohua1; Guo, Fei1,5

2021-10-01

10.1002/adfm.202107644

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

Recent years have witnessed marked progress in the electroluminescence efficiency of perovskite-based light emitting diodes (PeLEDs). Nevertheless, the majority of highly efficient devices feature only several square millimeters with the perovskite emitting layers deposited by nonscalable methods, which hinders their intriguing application in large-area lightings and displays. Here, a robust crystallization protocol is devised for the deposition of high-quality perovskite emitting layers by blade coating. Central to this method is the deployment of a vacuum process to the freshly coated precursor film, thereby achieving controllable crystallization kinetics by decoupling precursor deposition and the subsequent thermal annealing. Accordingly, dense and uniform perovskite thin films with efficient energy funneling among the evenly distributed 2D and 3D phases are obtained. PeLED devices based on the vacuum-processed quasi-2D cesium lead tribromide layers achieve high external quantum efficiencies of 8.24% and 6.12% on active areas of 0.12 and 1 cm(2), respectively. The scalability of the technology is further demonstrated by fabricating a 3.5 x 3.5 cm(2) device with bright and uniform emitting characteristic. This work offers a viable approach for further advancing the performance of large-area PeLEDs by scalable methods.

blade coating crystallization kinetics large-area LEDs light emitting diodes perovskite

SCI ; EI

英语

NI期刊

其他

National Natural Science Foundation of China[61705090,62004089] ; Natural Science Foundation of Guangdong Province[2020A1515010853] ; Fundamental Research Funds for the Central Universities[21620441] ; Shenzhen Science and Technology Innovation Committee[KQTD2015033110182370] ; Shenzhen Development and Reform Committee[2019-126]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000704496300001

WILEY-V C H VERLAG GMBH

20214110998593

Cesium compounds ; Coatings ; Crystallization kinetics ; Deposition ; Display devices ; Film preparation ; Isotherms ; Lead compounds ; Light ; Light emitting diodes ; Perovskite solar cells ; Thin films

Minerals:482.2 ; Solar Cells:702.3 ; Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Coating Materials:813.2

MATERIALS SCIENCE

Web of Science

1.Jinan Univ, Inst New Energy Technol, Coll Informat Sci & Technol, Guangzhou 510632, Peoples R China
2.Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Peoples R China
5.Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Zhengzhou 450002, Peoples R China

Chen, Chaoran,Zeng, Linxiang,Jiang, Zhengyan,et al. Vacuum-Assisted Preparation of High-Quality Quasi-2D Perovskite Thin Films for Large-Area Light-Emitting Diodes[J]. ADVANCED FUNCTIONAL MATERIALS,2021,32.

Chen, Chaoran.,Zeng, Linxiang.,Jiang, Zhengyan.,Xu, Zhenhua.,Chen, Yijun.,...&Guo, Fei.(2021).Vacuum-Assisted Preparation of High-Quality Quasi-2D Perovskite Thin Films for Large-Area Light-Emitting Diodes.ADVANCED FUNCTIONAL MATERIALS,32.

Chen, Chaoran,et al."Vacuum-Assisted Preparation of High-Quality Quasi-2D Perovskite Thin Films for Large-Area Light-Emitting Diodes".ADVANCED FUNCTIONAL MATERIALS 32(2021).