One-step high-performance CBD-PbS film deposition technology for room temperature near infrared detectors

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-06-21 DOI:10.1016/j.apsusc.2025.163752

Guodong Zhang , Donghai Guan , Jijun Qiu , Deping Huang , Haofei Shi , Chongqian Leng

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引用次数: 0

Abstract

High-performance photoconductive (PC) lead salt detector technology has the significant potential in the development and application of future uncooled infrared focal plane array (FPA) systems. However, the traditional long-time or high-temperature sensitization process brings challenges for large-scale and low-cost commercial applications of lead salt IR imagers. Herein, a novel chemical bath deposition (CBD) technology is demonstrated to fabricate a lead sulfide (PbS) detector without requiring a thermal-, iodine-, or oxygen-sensitization process. The chemical oxidant is adopt to modulate the growth mechanism contributing to the nano-grain interface modification and performance evolution. The as-grown monolayer film without multilayer technology exhibits a significant infrared radiation (IR) response and has a near mirror-like surface. At room temperature, the black body maximum peak detectivity of 1.55

\times

^{11}

cm \cdot {Hz}^{1 / 2} / W

of PbS detector is achieved, which almost attains the commercial products. This simplified one-step wet chemical fabrication process provides a scalable pathway towards the industrialization of lead salt imaging systems.

Abstract Image

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室温近红外探测器一步高效CBD-PbS薄膜沉积技术

高性能光导铅盐探测器技术在未来非冷却红外焦平面阵列（FPA）系统的开发和应用中具有重要的潜力。然而，传统的长时间或高温敏化工艺给铅盐红外成像仪的大规模低成本商业应用带来了挑战。在此，一种新的化学浴沉积（CBD）技术被证明可以制造硫化铅（PbS）探测器，而不需要热、碘或氧敏化过程。采用化学氧化剂调节生长机制，促进纳米颗粒界面改性和性能演变。未经多层技术的单层生长膜表现出明显的红外辐射响应，并具有近镜状表面。在室温下，实现了黑体最大峰值检出率为1.55 × 1011cm·Hz1/2/W的PbS探测器，基本达到了商用产品。这种简化的一步湿化学制造工艺为铅盐成像系统的工业化提供了可扩展的途径。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.