Flexible assembly of the PEDOT: PSS/ exfoliated β-Ga2O3 microwire hybrid heterojunction for high-performance self-powered solar-blind photodetector
Flexible assembly of the PEDOT: PSS/ exfoliated β-Ga2O3 microwire hybrid heterojunction for high-performance self-powered solar-blind photodetector
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PEDOT 的灵活组装：PSS/剥离式 β-Ga2O3 微线混合异质结，用于高性能自供电日盲光电探测器
DOI：
10.1364/oe.461342
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发表时间：
2022
期刊：
影响因子：
3.8
通讯作者：
Changqing Chen
中科院分区：
文献类型：
--
作者：
Zhihua Zheng;Wen Wang;Feng Wu;Zhiyuan Wang;Maocheng Shan;Yongming Zhao;Weijie Liu;Pengcheng Jian;Jiangnan Dai;Hai Lu;Changqing Chen
为实现高可靠性、高性能、低成本的自供电光电探测器（PD）在科研和民用领域的应用，采用一种灵活、低成本的组装方法，制备了一种基于PEDOT：PSS/剥离型β-Ga 2 O3微丝异质结的有机-无机杂化太阳盲紫外PD。利用高结晶度的β Ga 2 O3和高性能的空穴传输层PEDOT：PSS构成的异质结，器件在250 nm处具有39.8mA/W的高响应度，在280 nm处具有陡峭的截止边。此外，在反向偏压下的超高归一化光暗电流比（10 4 mW-1cm 2）和零偏压下的2 4 ×10 12 Jones的上级探测率也证明了其优异的探测能力。此外，该复合光电二极管还具有快速的上升时间（几毫秒）和高的抑制比（R250/R365：5.8 × 103），进一步显示了其对日盲紫外光的良好光谱选择性。这种优异的性能主要归功于先进异质结的大内建电场对光生载流子的有效分离。这种太阳盲型紫外光电二极管的柔性装配策略结合了高效率、低成本和高性能的优点，为光电二极管的研究和应用提供了更大的潜力。
Motivated by the goals of fabricating highly reliable, high performance, and cost-efficient self-powered photodetector (PD) for numerous scientific research and civil fields, an organic-inorganic hybrid solar-blind ultraviolet (UV) PD based on PEDOT: PSS/exfoliated β-Ga 2 O 3 microwire heterojunction was fabricated by a flexible and cost-effective assembly method. Benefiting from the heterojunction constructed by the highly crystalline β-Ga 2 O 3 and the excellent hole transport layer PEDOT: PSS, the device presents a high responsivity of 39.8 mA/W at 250 nm and a sharp cut-off edge at 280 nm without any power supply. Additionally, the ultra-high normalized photo-to-dark current ratio ( 10 4 mW -1 cm 2 ) under reverse bias and the superior detectivity of 2.4×10 12 Jones at zero bias demonstrate the excellent detection capabilities. Furthermore, the hybrid PD exhibits a rapid rise time (several milliseconds) and high rejection ratio (R 250 /R 365 : 5.8 × 10 3 ), which further highlights its good spectral selectivity for solar-blind UV. The prominent performance is mainly ascribed to the efficient separation of the photogenerated carriers by the large built-in electric field of the advanced heterojunction. This flexible assembly strategy for solar-blind UV PD combines the advantages of high efficiency, low cost and high performance, providing more potential for PD investigation and application in the future.