Modeling Reseach On Latest Organic Photodetectors

Organic photodetectors are optoelectronic devices that use organic materials as the photoelectric conversion layer to convert light signals into electrical signals.Organic materials have the advantages of low cost,easy preparation,flexibility,and light weight,making them widely used in fields such as flexible electronics,wearable devices,and optoelectronic displays.The performance of organic photodetectors mainly depends on the characteristics of organic photoelectric conversion materials,so material design is an important aspect of researching organic photodetectors.Researchers generally design and synthesize organic materials through experimental methods,and then prepare them into new organic photodetectors through steps such as material deposition,photolithography,and electrode deposition.Compared to the preparation of organic photodetectors through experiments,using computer simulations offers several advantages such as cost savings,good repeatability,and strong controllability.During the process of simulating organic optoelectronic detectors,we need to consider various factors,including the device structure,properties of organic semiconductor materials,and the transport processes of electrons and holes.To obtain accurate simulation results,we need to use appropriate physical models and suitable parameters.However,due to the relatively complex nature of organic semiconductor materials and the difficulty in establishing theoretical models,there is a lack of research on simulating organic optoelectronic detectors,and the simulation results are not sufficiently accurate.In this article,we conducted research on commonly used theoretical models of organic semiconductors and used Silvaco TCAD software to simulate a wide-band organic optoelectronic detector made from a blend of the wide-bandgap polymer PBDTTT-C-T as the donor and the FOIC(fused octacylic)small molecule as the acceptor.By optimizing and selecting various parameters involved in the simulation process,the simulation results showed that the parameters and physical models used were able to explain and predict the device’s performance well and were consistent with experimental results.Therefore,we believe that the parameters and physical models used in the simulation process have good reliability and practical value,and can provide useful references for the simulation and research of similar optoelectronic detectors.This can help improve the design and optimization efficiency of organic photodetectors and accelerate the development process of optoelectronic devices.