The impact of structural modifications in donor-acceptor systems on homojunction organic solar cell photovoltaic properties

Abstract

This study presents the synthesis and characterization of novel donor-π-acceptor (D-π-A) molecules specifically designed for inverted homojunction single-material organic solar cells (HOSCs). It explores how modifications in triarylamine-based donor groups and π-bridges impact the molecular organization, optical, electrochemical, and photovoltaic characteristics of these molecules. By systematically modifying features like π-bridge length and donor unit strength, the research aims to improve power conversion efficiency (PCE) and overall device performance. While the PCE values are relatively modest, the findings highlight design strategies that balance simplicity, robustness, and cost-effectiveness, offering valuable insights for advancing HOSCs in organic photovoltaic applications.