Tailoring the Structure of Low-Dimensional Halide Perovskite through a Room Temperature Solution Process: Role of Ligands

Young-Taek Yoo; Do Yeon Heo; Sa-Rang Bae; Jinwoo Park; Tae-Woo Lee; Ho Won Jang; Sang Hyun Ahn; Soo Young Kim

doi:10.1002/smtd.202100054

Tailoring the Structure of Low-Dimensional Halide Perovskite through a Room Temperature Solution Process: Role of Ligands

Small Methods. 2021 Jun;5(6):e2100054. doi: 10.1002/smtd.202100054. Epub 2021 Apr 21.

Authors

Young-Taek Yoo¹, Do Yeon Heo², Sa-Rang Bae², Jinwoo Park³, Tae-Woo Lee^{4

5}, Ho Won Jang⁶, Sang Hyun Ahn¹, Soo Young Kim²

Affiliations

¹ School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, 06974, Republic of Korea.
² Department of Materials Science and Engineering, Institute of Green Manufacturing Technology, Korea University, Seoul, 02841, Republic of Korea.
³ Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
⁴ Department of Materials Science and Engineering, Institute of Engineering Research, Research Institute of Advanced Materials, Nano Systems Institute (NSI), Seoul National University, Seoul, 08826, Republic of Korea.
⁵ School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
⁶ Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.

PMID: 34927919
DOI: 10.1002/smtd.202100054

Abstract

In this study, halide perovskite nanocrystals are synthesized by controlling the ligand length and amount, and investigated the effects on the change in the ligand length and amount on the shape, size, crystal structure, and optical properties of the perovskite nanocrystals. The results reveal the tendency and respective effects of amine and acid ligands on perovskite nanocrystals. The amine ligands bind directly to the perovskite nanocrystals. Consequently, the amine ligands with longer chains interfere with the aggregation of the initially formed nanocrystals, thus limiting the size of the halide perovskite nanocrystals. Similar to the amine ligands, the acid ligands directly bond with the perovskite nanocrystals; however, they are also indirectly distributed around the nanocrystals, thus affecting their structure and dispersion. Consequently, the acid ligands affect the assembly of the initially formed nanocrystals, which determine the shape and crystal structure of the nanocrystals. It is believed that the report will provide useful insight on the synthesis of halide perovskites for application in optoelectronic devices.

Keywords: acid ligands; amine ligands; nanocrystals; perovskite ligands; perovskites.

Abstract

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