Modified vapor phase deposition technology for high-performance uncooled MIR PbSe detectors. Issue 55 (28th October 2021)

• Record Type: Journal Article
• Authors: Qiu, Jijun; Liu, Yun; Zhang, Guodong; Shi, Kanghao; Li, Yanzhen; Luo, Yingmin
• Is Part Of: RSC advances. Volume 11:Issue 55(2021)
• Page Start: 34908
• Page End: 34914
• Publication Date: 2021-10-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra06144e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The low detectivity of VPD-PbSe MIR detectors was broken by duplicating the microstructural features and phase composition of high-performance CBD-PbSe detectors, providing a commercial technical solution for megapixel uncooled PbSe FPA imagers. Abstract : The low performance of middle infrared (MIR) PbSe detectors fabricated from vapor phase deposition (VPD) technology restricts the rapid development of VPD technology and detector commercialization. A modified VPD process was proposed to duplicate the microstructural features of high-performance CBD-PbSe detectors for a breakthrough in the VPD technology. A peak detectivity D * of 1.6 × 10 10 cm Hz 1/2 W −1 at 298 K was achieved under the optimized sensitization, approaching the best performance of CBD-PbSe detectors. Through the contrasting various microstructures obtained from diverse methods, the nanoparticle self-assembly structure in VPD-PbSe oriented rod-like crystals is an important factor for the IR sensitivity. The microstructural evolution demonstrated that there is a large space to grow for VPD-PbSe detectivity D * via eliminating the voids formed in the iodine-sensitization process. The increased performance indicates that the modified VPD technology can provide technical support for the manufacturing of the megapixel uncooled lead-salt FPA imager and accelerate its industrialization.