Electrospun indium gallium zinc oxide semiconductor nanofibers with different persistent photoconductivity effects at low and high temperatures

Abstract In recent years, persistent photoconductivity (PPC) has received significant attention due to its potential applications in a wide range of fields. This study focuses on the PPC observed in electrospun indium gallium zinc oxide (IGZO) semiconductor nanofibers, particularly the persistence of photoconductivity following the cessation of light excitation. The study delves into the mechanisms underlying the PPC effect in IGZO materials, with a specific focus on how the structure of electrospun nanofibers influences this phenomenon. We examine the effects of composition and temperature on the photoresponse of IGZO nanofibers, concluding that electrospun IGZO semiconductors exhibit distinct PPC mechanisms at low and high temperatures. This variation is primarily attributed to the significant role of interface defects, introduced during electrospinning, in influencing the PPC effect at elevated temperatures. This research introduces an innovative strategy for developing advanced photoelectric materials and devices.