Performance enhancement of Pt/TiO2/Si UV-photodetector by optimizing light trapping capability and interdigitated electrodes geometry. (September 2016)

• Record Type: Journal Article
• Authors: Bencherif, H.; Djeffal, F.; Ferhati, H.
• Is Part Of: Superlattices and microstructures. Volume 97(2016)
• Page Start: 303
• Page End: 312
• Publication Date: 2016-09
• Subjects: Photodetector -- Interdigital contact -- High-speed -- High-responsivity -- Optimization; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2016.06.028
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: This paper presents a hybrid approach based on an analytical and metaheuristic investigation to study the impact of the interdigitated electrodes engineering on both speed and optical performance of an Interdigitated Metal–Semiconductor–Metal Ultraviolet Photodetector (IMSM-UV-PD). In this context, analytical models regarding the speed and optical performance have been developed and validated by experimental results, where a good agreement has been recorded. Moreover, the developed analytical models have been used as objective functions to determine the optimized design parameters, including the interdigit configuration effect, via a Multi-Objective Genetic Algorithm (MOGA). The ultimate goal of the proposed hybrid approach is to identify the optimal design parameters associated with the maximum of electrical and optical device performance. The optimized IMSM-PD not only reveals superior performance in terms of photocurrent and response time, but also illustrates higher optical reliability against the optical losses due to the active area shadowing effects. The advantages offered by the proposed design methodology suggest the possibility to overcome the most challenging problem with the communication speed and power requirements of the UV optical interconnect: high derived current and commutation speed in the UV receiver. Highlights: UV-photodetector with interdigitated electrodes geometry engineering is proposed. Photodetector exhibits enhancement over the reported data for UV-sensors. New optimized approach using MOGA-based computation is suggested. Optimized UV-photodetector device is suitable for UV optical interconnect applications.