Presentation Information
[7p-S201-9]High-Performance Photodetectors of Phase-Pure AgBiS2 Nanocrystals
〇(M2)Fidya Mawaddah1, Dadan Suhendar1, Yuta Tanaka1, Keishi Kitada1, Toshiki Shimizu1, Hiroki Minoda1, Satria Zulkarnaen Bisri1 (1.Tokyo Univ. Agri. & Tech.)
Keywords:
Colloidal Nanocrystals,AgBiS2,Photodetector
AgBiS2 Nanocrystals (NCs) offer a compelling alternative to lead-, mercury- or cadmium-based compounds due to a broad absorption spectrum in the visible and near-infrared regions. Early studies of AgBiS2-based solar cells demonstrated a power conversion efficiency (PCE) of 6%, with a theoretical potential efficiency exceeding 25%, suggesting that this compound is also suitable for high-performance photodetector applications. However, despite this initial promise, the full potential of AgBiS2 NCs—especially in photodetectors—remains unrealized. Current AgBiS2-based photodetectors exhibit suboptimal performance, including low responsivity and sensitivity in the visible and NIR range, primarily due to unresolved material challenges. Addressing these challenges through precise materials control represents the key to unlocking high-performance, solution-processed photodetectors. Here, we demonstrate high-performance photodetectors based on phase-pure AgBiS2 nanocrystals (NCs). Having high-quality NC products enables the realization of photodetector devices of a few monolayers of AgBiS2 NC thin film. This work highlights how synthetic precision serves as the foundation for high-performance AgBiS2 photodetectors, offering a scalable pathway toward practical applications.