Large and Dense Organic-Inorganic Hybrid Perovskite CH3NH3PbI3 Wafer Fabricated by One-Step Reactive Direct Wafer Production with High X-ray Sensitivity.
ACS Appl Mater Interfaces
; 12(14): 16592-16600, 2020 Apr 08.
Article
in En
| MEDLINE
| ID: mdl-32216332
ABSTRACT
Lead halide perovskites with good optoelectronic properties and high attenuation of high-energy radiation are great candidates for X-ray radiation detectors. Large area, dense, and thick films or wafers are a prerequisite for these applications. In this paper, a one-step heat-assisted high-pressure press method is developed to directly prepare a large (the largest has a diameter of 80 mm) and thickness- and shape-controlled phase-pure organic-inorganic hybrid CH3NH3PbI3 wafer of densely packed large microcrystals from raw powder materials. Meanwhile, this method uses no solvent to achieve essentially 100% material utilization. The obtained wafers show good ambipolar carrier mobilities of â¼20 cm2 V-1 s-1 and a µτ product as high as 3.84 × 10-4 cm2 V-1. Under an X-ray source using an acceleration voltage of 40 kV, the perovskite wafer-based X-ray detector shows an X-ray sensitivity as large as 1.22 × 105 µC Gyair-1 cm-2 under a 10 V bias, the highest reported for any perovskite material. The method provides a convenient strategy for producing large perovskite wafers with good optoelectronic properties, which will facilitate the development of large perovskite devices.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Diagnostic_studies
Language:
En
Journal:
ACS Appl Mater Interfaces
Journal subject:
BIOTECNOLOGIA
/
ENGENHARIA BIOMEDICA
Year:
2020
Document type:
Article