OSRAM and Broadcom Inc. are key players in the photodiode sensor market, focusing on sustainability and advanced semiconductor solutions. The market is driven by high demand for smart devices, with silicon photodiodes expected to dominate sales, particularly in North America, Japan, and China, due to their wide applications and cost efficiency. Recent innovations include OSRAM's SFH 2704A photodiode, enhancing performance for vital signs monitoring, and advancements in silicon-based photodiodes by the Fraunhofer Institute.