Graded multilayer triple cation perovskites for high speed and detectivity self-powered photodetector via scalable spray coating process
Issued Date
2022-12-01
Resource Type
eISSN
20452322
Scopus ID
2-s2.0-85133122300
Pubmed ID
35773302
Journal Title
Scientific Reports
Volume
12
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Scientific Reports Vol.12 No.1 (2022)
Suggested Citation
Amratisha K., Tuchinda W., Ruankham P., Naikaew A., Pansa-Ngat P., Srathongsian L., Wattanathana W., Shin Thant K.K., Supruangnet R., Nakajima H., Sahasithiwat S., Kanjanaboos P. Graded multilayer triple cation perovskites for high speed and detectivity self-powered photodetector via scalable spray coating process. Scientific Reports Vol.12 No.1 (2022). doi:10.1038/s41598-022-14774-x Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/87730
Title
Graded multilayer triple cation perovskites for high speed and detectivity self-powered photodetector via scalable spray coating process
Other Contributor(s)
Abstract
Rapid advancements in perovskite materials have led to potential applications in various optoelectronic devices, such as solar cells, light-emitting diodes, and photodetectors. Due to good photoelectric properties, perovskite enables low-cost and comparable performance in terms of responsivity, detectivity, and speed to those of the silicon counterpart. In this work, we utilized triple cation perovskite, well known for its high performance, stability, and wide absorption range, which is crucial for broadband photodetector applications. To achieve improved detectivity and faster response time, graded multilayer perovskite absorbers were our focus. Sequential spray deposition, which allows stacked perovskite architecture without disturbing lower perovskite layers, was used to generate single, double, and triple-layer perovskite photodetectors with proper energy band alignment. In this work, we achieved a record on self-powered perovskite photodetector fabricated from a scalable spray process in terms of EQE and responsivity of 65.30% and 0.30 A W-1. The multilayer devices showed faster response speed than those of single-layer perovskite photodetectors with the champion device reaching 70 µs and 88 µs for rising and falling times. The graded band structure and the internal electric field generated from perovskite heterojunction also increase specific detectivity about one magnitude higher in comparison to the single-layer with the champion device achieving 6.82 × 1012 cmHz1/2 W−1.