基于TIPS-并五苯纳米线/CsPbBr3异质结的高度均匀光子突触阵列,Journal of Materials Chemistry C

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基于TIPS-并五苯纳米线/CsPbBr3异质结的高度均匀光子突触阵列
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-10-23 , DOI: 10.1039/d3tc01609a
Hongyi Hong ₁ , Zihong Shen ₁ , Zunxian Yang _{1,

2} , Yuliang Ye ₁ , Bingqing Ye ₁ , Yuanqing Zhou ₁ , Qiaocan Huang ₁ , Wenbo Wu ₁ , Zongyi Meng ₁ , Zhiwei Zeng ₁ , Songwei Ye ₁ , Zhiming Cheng ₁ , Qianting Lan ₁ , Jiaxiang Wang ₁ , Ye Chen ₁ , Hui Zhang ₁ , Tailiang Guo _{1,

2} , Fushan Li _{1,

2} , Zhenzhen Weng ₃ , Yongyi Chen ₃

Affiliation

受生物视觉系统的启发，仿生视觉系统对于集成大规模和小型有机光子突触传感器，进一步构建人工视觉系统的神经形式具有重要意义。然而，在制造具有良好完整性的突触晶体管阵列方面仍然存在许多不可避免的问题。在此，我们制造了基于CsPbBr ₃薄膜/TIPS-并五苯纳米线的突触阵列。由于模板压印工艺对有机前驱体溶液的限域作用，复合薄膜表面光滑平整，没有明显的晶界，突触阵列上的复合晶体管具有超高的稳定性。获得了单个器件的高循环稳定性，并且多个器件在暗光条件下实现了优异的稳态漏源电流和良好的瞬态光电流的整体一致性。当引入光时，突触阵列的明暗电流比超过8×10 ^{3 。}平均瞬态峰值光电流为-14 nA。基于有机晶体管的紧凑模型，对实验数据进行拟合，以估计光功率变化对器件光电性能的影响，并评估阵列内不同器件的瞬态工作稳定性。基于复合突触阵列，构建了人工视觉系统，实现图像处理功能。

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Highly uniform photonic synapse arrays based on TIPS-pentacene nanowires/CsPbBr3 heterojunctions

Inspired by the biological visual system, the biomimetic visual systems are of great significance to integrate large-scale and small-scale organic photon synaptic sensors and further construct a neural form of an artificial visual system. However, there are still many unavoidable problems in fabricating synaptic transistor arrays with good integrity. Herein, we fabricated synaptic arrays based on CsPbBr₃ thin film/TIPS-pentacene nanowires. Thanks to the confinement effect of the template imprinting process on organic precursor solutions, the surface of the composite film was smooth and flat without obvious grain boundaries and the composite transistor on the synaptic array had ultra-high stability. High cycling stability of a single device was obtained, and the excellent overall consistency of steady-state leakage source current and good transient photocurrent of multiple devices under dark and light conditions were achieved. The light-to-dark current ratio of the synaptic array exceeded 8 × 10³ when the light was introduced. The average transient peak photocurrent of −14 nA was achieved. Based on the compact model of organic transistors, the experimental data was fitted to estimate the impact of light power changes on the photoelectronic performance of the device and evaluate the transient operating stability of different devices within the arrays. Based on a composite synaptic array, an artificial vision system was constructed to achieve image processing functions.

更新日期：2023-10-23

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