PbS quantum dot(QD)image sensors have emerged as promising chips for a wide range of infrared(IR)imaging applications due to their monolithic integration with silicon-based readout integrated circuits.However,avoiding...PbS quantum dot(QD)image sensors have emerged as promising chips for a wide range of infrared(IR)imaging applications due to their monolithic integration with silicon-based readout integrated circuits.However,avoiding primary toxic Pb usage and reducing the cost of PbS QDs remains crucial for widespread application.We present a novel cost-effective and environmentally friendly hydrometallurgical process for recovering PbCl_(2)from spent lead-acid battery paste to synthesize high-quality PbS QDs.The method recovers PbCl_(2)with a production ratio of 97%and a purity of 99.99%.PbS QDs and photodetectors synthesized from recycled PbCl_(2)(R-PbCl_(2))have comparable performance and quality to those made using commercial PbCl_(2).R-PbCl_(2)-derived photodetectors exhibit a high external quantum efficiency of 49.6%and a high specific detectivity of 6.95×10^(12)Jones compared to published studies.Additionally,based on R-PbCl_(2),a PbS QD image sensor with 640×512 resolution successfully discriminated common solvents.Moreover,through life-cycle assessment and economic cost analysis,this novel synthesis route offers great advantages in the environmentally friendly use of chemical reagents and reduces the production cost of PbS QDs by 23.2%compared to commercial PbCl_(2).Thus,this work not only contributes to the green recycling of spent lead paste but also provides a low-cost strategy for synthesizing PbS QDs and their optoelectronic application.展开更多
基金supported by Key program of National Natural Science Foundation of China(52330004)National Natural Science Foundation of China General Project(51978301)National Key Research and Development Program of China(2023YFC3902802)。
文摘PbS quantum dot(QD)image sensors have emerged as promising chips for a wide range of infrared(IR)imaging applications due to their monolithic integration with silicon-based readout integrated circuits.However,avoiding primary toxic Pb usage and reducing the cost of PbS QDs remains crucial for widespread application.We present a novel cost-effective and environmentally friendly hydrometallurgical process for recovering PbCl_(2)from spent lead-acid battery paste to synthesize high-quality PbS QDs.The method recovers PbCl_(2)with a production ratio of 97%and a purity of 99.99%.PbS QDs and photodetectors synthesized from recycled PbCl_(2)(R-PbCl_(2))have comparable performance and quality to those made using commercial PbCl_(2).R-PbCl_(2)-derived photodetectors exhibit a high external quantum efficiency of 49.6%and a high specific detectivity of 6.95×10^(12)Jones compared to published studies.Additionally,based on R-PbCl_(2),a PbS QD image sensor with 640×512 resolution successfully discriminated common solvents.Moreover,through life-cycle assessment and economic cost analysis,this novel synthesis route offers great advantages in the environmentally friendly use of chemical reagents and reduces the production cost of PbS QDs by 23.2%compared to commercial PbCl_(2).Thus,this work not only contributes to the green recycling of spent lead paste but also provides a low-cost strategy for synthesizing PbS QDs and their optoelectronic application.
