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New modeling method for UV sensor photoelectrical parameters extraction
摘要： In this work, we have developed a new modeling tools based on physical, mathematical and numerical models for the analysis of UV-photodetectors based on ZnO NRs/PPV-C6 hybrid heterojunctions. The photoelectrical equivalent circuit parameters are the series resistance (Rs), the shunt resistance (Rp), the reverse current density (J0), the ideality factor (n) and the photocurrent density (Jph). A combined physical-mathematical-numerical approach based on the modified Schockley model, the Lambert W function and the optimized method of the Root Mean Square error (RMSE) was applied to analyze the different devices performances. The results demonstrate that the incorporation of PPV-C6 polymer to the ZnO NRs structure leads to significant amelioration in the interface and increase of both the Jph and responsivity with a decrease of the Rs. This kind of hybrid heterojunction based UV light sensor is promising for future low cost and high performance optoelectronic devices development.
关键词： Photodetectors,Hybrid heterojunction,UV sensor,Modeling,Photoelectrical properties
更新于2025-09-23 15:23:52
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A MoS <sub/>2</sub> /PTCDA Hybrid Heterojunction Synapse with Efficient Photoelectric Dual Modulation and Versatility
摘要： Just as biological synapses provide basic functions for the nervous system, artificial synaptic devices serve as the fundamental building blocks of neuromorphic networks; thus, developing novel artificial synapses is essential for neuromorphic computing. By exploiting the band alignment between 2D inorganic and organic semiconductors, the first multi-functional synaptic transistor based on a molybdenum disulfide (MoS2)/perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) hybrid heterojunction, with remarkable short-term plasticity (STP) and long-term plasticity (LTP), is reported. Owing to the elaborate design of the energy band structure, both robust electrical and optical modulation are achieved through carriers transfer at the interface of the heterostructure, which is still a challenging task to this day. In electrical modulation, synaptic inhibition and excitation can be achieved simultaneously in the same device by gate voltage tuning. Notably, a minimum inhibition of 3% and maximum facilitation of 500% can be obtained by increasing the electrical number, and the response to different frequency signals indicates a dynamic filtering characteristic. It exhibits flexible tunability of both STP and LTP and synaptic weight changes of up to 60, far superior to previous work in optical modulation. The fully 2D MoS2/PTCDA hybrid heterojunction artificial synapse opens up a whole new path for the urgent need for neuromorphic computation devices.
关键词： hybrid heterojunction synapses,photoelectric dual modulation,2D materials
更新于2025-09-23 15:21:01