Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating

Bibliographic Details
Title: Inorganic Cs3Bi2I9 lead-free halide perovskite film for large-area X-ray detector via low-cost ambient spray coating
Authors: Yen-Ting Chen, Zi-Xiang Wen, Chen-Fu Lin, Ming-Hsien Li, Peter Chen
Source: NPG Asia Materials, Vol 16, Iss 1, Pp 1-15 (2024)
Publisher Information: Nature Portfolio, 2024.
Publication Year: 2024
Collection: LCC:Materials of engineering and construction. Mechanics of materials
LCC:Biotechnology
Subject Terms: Materials of engineering and construction. Mechanics of materials, TA401-492, Biotechnology, TP248.13-248.65
More Details: Abstract Lead-free Cs3Bi2I9 single crystals have been demonstrated to be promising materials for direct X-ray detectors with remarkable performance. However, their application for 2D X-ray imaging is hindered by their time-consuming preparation and limited crystal size. In this paper, a thick Cs3Bi2I9 perovskite film fabricated via facile spray coating at a low processing temperature, which increases the area of the photoactive film, reduces the processing time, decreases the energy budget and the production cost, and enhances the production yield due to high material utilization, has great potential for commercial applications. Careful control of the processing temperature and intervals during spray coating results in a dense and thick perovskite film with well-stacked perovskite domains. The compact perovskite film enhances the charge transport capability of the Cs3Bi2I9 perovskite film and reduces the dark current density of the X-ray detector. The resultant X-ray detector, prepared through a two-step spray coating process, exhibited a sensitivity of 127.23 μC Gyair −1 cm−2 and a detection limit of 7.4 μGyair s−1. In addition, the device delivers long-term stability with a consistent photoresponse when exposed to consecutive X-ray pulse irradiation.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 1884-4057
Relation: https://doaj.org/toc/1884-4057
DOI: 10.1038/s41427-024-00552-w
Access URL: https://doaj.org/article/62ba4fdf5c784d68a6ad70f75d4211bc
Accession Number: edsdoj.62ba4fdf5c784d68a6ad70f75d4211bc
Database: Directory of Open Access Journals
More Details
ISSN:18844057
DOI:10.1038/s41427-024-00552-w
Published in:NPG Asia Materials
Language:English