Glutamine Induced High-Quality Perovskite Film to Improve the Efficiency of NIR Perovskite Light-Emitting Diodes

Jianan Chen; Zhaobing Tang; Yangzhou Zhou; Shuo Ding; Liang Li; Lei Qian; Chaoyu Xiang

doi:10.1002/smll.202207520

Glutamine Induced High-Quality Perovskite Film to Improve the Efficiency of NIR Perovskite Light-Emitting Diodes

Small. 2023 May;19(19):e2207520. doi: 10.1002/smll.202207520. Epub 2023 Feb 20.

Authors

Jianan Chen^{1

2}, Zhaobing Tang^{1

3

4}, Yangzhou Zhou¹, Shuo Ding^{1

3}, Liang Li⁵, Lei Qian^{1

3

4}, Chaoyu Xiang^{1

3

4}

Affiliations

¹ Laboratory of Advanced Nano-Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Zhongchuang 1st Road, Hangzhou Bay New Zone, Ningbo, Zhejiang, 315000, China.
² Department of Mechanical Engineering, Ningbo University, Ningbo, Zhejiang, 315201, China.
³ Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Science, 1219 West Zhongguan Road, Ningbo, Zhejiang, 315201, China.
⁴ Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315000, China.
⁵ Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Zhuhai MUST Science and Technology Research Institute, Macau University of Science and Technology, Taipa, Macao, 999078, China.

PMID: 36808211
DOI: 10.1002/smll.202207520

Abstract

Formamidine lead iodide (FAPbI₃ ) is an important material for realizing high-performance near-infrared light-emitting diodes (NIR-LEDs). However, due to the uncontrollable growth of solution-processed films which usually causes low coverage, and poor surface morphology, the development of FAPbI₃ -based NIR-LEDs is hindered, restraining its potential industrial applications. In this work, by employing glutamine (Gln) in perovskite precursor, the quality of FAPbI₃ film is improved significantly. Due to the ameliorated solution process by the organic additive, the film coverage over the substrate is substantially enhanced. Meanwhile, the trap state of grain is largely reduced. Consequently, NIR perovskite LEDs are demonstrated with a maximum external quantum efficiency (EQE) of 15% with the emission peak at 795 nm, which is four times higher than the device with pristine perovskite film.

Keywords: amino acid; high-quality films; near-infrared; perovskite light-emitting diodes.

Abstract

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