Structural, optical, and photoelectrical properties of TiPcCl2/n-Si heterojunctions for optoelectronic applications

Abstract

This study comprehensively investigated the structural, optical, and photoelectrical properties of titanium-phthalocyanine chloride (TiPcCl₂)/n-Si heterojunctions (HJ), focusing on their potential application in solar cells and renewable energy technologies. The structural analysis confirmed the successful deposition of TiPcCl₂ films exhibiting high crystalline and uniform morphology with an average grain size of approximately 60 nm. Optical characterization revealed a strong absorption in the visible region, with a bandgap of 1.45 eV, making TiPcCl₂ suitable for light-harvesting applications. The photoelectrical measurements under illumination demonstrated a clear photovoltaic response, with the HJ achieving a short-circuit current density (9.43 × 10⁻⁹ A/cm²) and open-circuit voltage (0.1 V) indicative of efficient carrier separation and transport. The results suggest that TiPcCl₂/n-Si HJ holds promise for photovoltaic applications, particularly in hybrid solar cells that leverage the advantages of organic/inorganic combinations. The study contributes valuable insights into the design and optimization of such HJs, paving the way for their use in sustainable energy solutions.