Scalable Selective Growth of Bi 2 SiO 5 for Uniform UV-B Photodetector Arrays
Source abstract
Abstract
Here, we introduce Bi 2 SiO 5 (BSO), an intrinsically UV-B selective oxide with a 4.17 eV bandgap (297 nm), and present a cost-effective, scalable conversion approach for its synthesis. A single-step reaction between Bi 2 O 3 vapor and SiO 2 in fused silica converts the glass directly into crystalline BSO. To enable scalable integration, SiO 2 is first patterned on Al 2 O 3; the same conversion then proceeds exclusively within those patterns, yielding pixel-defined BSO films with sharply defined edges. Devices fabricated on these films exhibit a UV-B photoresponse more than 360-fold stronger than their UV-A response, evidencing strong spectral selectivity. Owing to the clean selective-area conversion, arrays of devices show a relative standard deviation in responsivity of good 5.3%, underlining excellent uniformity and reproducibility. The synergy of intrinsic UV-B selectivity, high material quality, and patternable growth positions BSO as a compelling platform for next-generation UV-B photodetectors and integrated optical sensor arrays.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ga2O3 and related materials · ZnO doping and properties · Transition Metal Oxide Nanomaterials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Energy Systems Research
Ajou University
Department of Materials Science and Engineering
Ajou, University
Department of Materials Science and Engineering, Research Institute of Advanced Materials
Seoul National University
Department of Electrical and Computer Engineering
Sungkyunkwan University
School of Semiconductor Science& Technology
Jeonbuk National University
Advanced Institute of Convergence Technology
Funding
National Research Foundation of Korea(NRF) grant funded by the Korea government (MSIT) · Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education · Global - Learning & Academic research institution for Master?s?PhD students, and Postdocs(LAMP) Program of the National Research Foundation of Korea(NRF) grant funded by the Ministry of Education
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