A low-temperature efficient approach for the fabrication of ZnO-rGO heterostructures for applications in optoelectronic applications

In recent years, graphene oxides (GO)/reduced oxide (rGO) and its derivatives have garnered/gained the attention of scientific research community due to their superior candidature in various electronic optoelectronic devices exceptional solution processability, easy fabrication, tunable electron transport properties. However, requirement high temperature processing steps complicated processes motivate find simple, efficient low-temperature methods. Here, we report synthesis GO/rGOs ZnO-rGO nanocomposite at a relatively low 150 °C using simple solution-processed methodology. The SEM/EDX, XRD, Raman spectroscopy, FTIR, UV-vis spectroscopy performed investigate morphological, structural optical properties confirmed successful GO, rGO with an enhanced carbon-carbon (sp2 sp3) component reduced oxygen-containing functional group restoration graphitic domain hybrid nanocomposite, attributed possible chemical interaction between ZnO through groups. bandgap is modulated from 3.27 eV 2.72 comparison pure ZnO. Using Hall measurement carrier concentration was found be 3.077 x 1017 cm-3, 4.518 1020 2.973 1019 cm-3 for ZnO, ZnO-rGO, respectively mobility calculated as 16.787 cm2/V.s, 46.112 cm2/V.s 25.953 respectively. fabricated cell exhibited power conversion efficiency 6.17 % (Voc = 0.551 V Jsc 24.33 mA/cm2. After 8 weeks, 90 initial could achieved, suggesting excellent stability devices. prepared samples potential applications different electronics optoelectronics performance.