Self-Patterned CsPbBr3 Nanocrystals for High-Performance Optoelectronics
Type
ArticleAuthors
Xin, Bin
Pak, Yusin
Mitra, Somak

Almalawi, Dhaifallah
Alwadai, Norah M.

Zhang, Yuhai
Roqan, Iman S.

KAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Semiconductor and Material Spectroscopy (SMS) Laboratory
KAUST Grant Number
BAS/1/1319-01-01Date
2019-01-08Online Publication Date
2019-01-08Print Publication Date
2019-02-06Permanent link to this record
http://hdl.handle.net/10754/630884
Metadata
Show full item recordAbstract
All-inorganic lead halide perovskites are promising materials for many optoelectronic applications. However, two issues that arise during device fabrication hinder their practical use, namely inadequate continuity of coated inorganic perovskite films across large areas and inability to integrate these films with traditional photolithography due to poor adhesion to wafers. Herein, for the first time, to address these issues, we show a room-temperature synthesis process employed to produce of CsPbBr3 perovskite nanocrystals with two-dimensional (2D) nanosheet features. Due to the unique properties of these 2D nanocrystals, including the “self-assembly” characteristic, and “double solvent evaporation induced self-patterning” strategy are used to generate high-quality patterned thin films in selected areas automatically after-drop-casting, enabling fabrication of high-performance devices without using complex and expensive fabrication processing techniques. The films are free from micro-cracks. In a proof-of-concept experiment, photodetector arrays are used to demonstrate the superior properties of such films. We provide evidence of both high responsivity (9.04 A/W) and high stability across large areas. The photodetectors fabricated on flexible substrate exhibit outstanding photo-response stability. Advanced optical and structural studies reveal the possible mechanism. Our simple and cost-effective method paves the way for the next-generation nanotechnology based on high-performance, cost-effective optoelectronic devices.Citation
Xin B, Pak Y, Mitra S, Almalawi D, Alwadai N, et al. (2019) Self-Patterned CsPbBr3 Nanocrystals for High-Performance Optoelectronics. ACS Applied Materials & Interfaces. Available: http://dx.doi.org/10.1021/acsami.8b17249.Sponsors
B. X. and Y. P. contributed equally to this study and share first authorship. The authors gratefully acknowledge financial support by the King Abdullah University of Science and Technology (KAUST) baseline funding (BAS/1/1319-01-01) and Y. Z. is grateful to the seeding fund from University of Jinan, and National Science Foundation for Young Scientists of China (Grant No. 21805111).Publisher
American Chemical Society (ACS)Additional Links
https://pubs.acs.org/doi/abs/10.1021%2Facsami.8b17249ae974a485f413a2113503eed53cd6c53
10.1021/acsami.8b17249