Fast fabrication of μm-thick perovskite films by using a one-step doctor-blade coating method for direct X-ray detectors

Kuo Wei Huang, Ming Hsien Li, Yen Ting Chen, Zi Xiang Wen, Chen Fu Lin, Peter Chen

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Deposition of large-area perovskite films for direct X-ray detectors under ambient conditions is highly desirable for commercial application. In this work, we employ a one-step doctor-blade coating method to prepare a perovskite film with the advantages of rapid fabrication, easy scalability, and raw material savings. We incorporate a high content of 20-wt% crown ether, namely 18-crown ether-6 (18C6), into the perovskite precursor solution to prepare a μm-thick perovskite film, which effectively attenuates the X-ray irradiation. The large cyclic structure of 18C6 bonding with the DMSO solvent and solutes via the hydrogen and van der Waals forces increases the viscosity of the precursor solution from 3.4 mPa s (0-wt% 18C6) to 41.3 mPa s (20-wt% 18C6). A continuous, compact, and uniform perovskite thick film with a thickness of 6.2 μm is fabricated by the doctor-blade coating in just 10 seconds. The direct X-ray detectors based on the doctor-bladed perovskite thick film achieve a dark current density of 1.6 nA cm−2 under an electric field of 1/20 of that required for the commercial a-Se-based X-ray detector. The device sensitivity reaches 33.51 μC Gyair−1 cm−2, and the limit of detection is determined to be 70.17 μGyair s−1. Our study paves a way toward industrialization with the merits of scalable, fast and easy production, and low-cost X-ray detectors.

原文English
頁(從 - 到)1533-1542
頁數10
期刊Journal of Materials Chemistry C
12
發行號4
DOIs
出版狀態Published - 2023 12月 20

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 材料化學

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