A Study of Inverted Structure Polymer Solar Cell using ZnO with Low Temperature Process

Recently, active research is being conducted on polymer solar cells to improve power conversion efficiency by developing new device structures, synthesizing materials, and applying them charge extraction layers. In this study, we analyzed the influence of ZnO performance using various thin films (using high low temperature sol-gel processes nanoparticle process) as an electron layer in inverted based PBDB-T:ITIC. The film was formed high-temperature (450°C) process, which resulted increase sheet resistance ITO electrode five times. As a result, (4.12%). Conversely, butanol-based exhibited better dispersion surface properties than IPA-based ZnO, resulting improved cell (PCE 6.35% 4.58% with butanol respectively). Additionally, precursor solution developed low-temperature (150°C) applied cell. Consequently, significantly 8.89%)due formation ripple-shaped surface, facilitated electrons due excellent roughness.