| dc.description.abstract | In this study, several organic photoelectronic materials were developed primarily based on triarylamine (TAA). One end of the core was functionalized with a methoxyl group as a terminal electron-donating group of triphenylamine (TPA). The other end was modified with electron-withdrawing groups, ethyl cyanoacetate and malononitrile, as anchoring groups. Additionally, thiophene units were incorporated to extend the conjugation length and various numbers of electron-pushing groups were attached to regulate the energy level of the materials and enhance intramolecular charge transfer effect. As a result, six small molecule materials were synthesized: TPA-MN (1), TPA-CA (1a), TPA-T-MN (2), TPA-T-CA (2a), 3TPA-MN (3), and 3TPA-CA (3a). Finally, this series were applied as hole transporting materials in Tin-based perovskite solar cells and fabricated into devices using a self-assembly process. Currently, the device conditions are still being optimized. However, TPA-T-MN (2) and 3TPA-MN (3) have both already achieved efficiencies of 7%. Compared to the highest reported efficiency of 8.3% for Tin-based perovskite solar cells fabricated using a self-assembly method, these materials have shown good performance in current test. These series are under optimizing. After improvement, their performances are expected for better efficiencies. | en_US |