| dc.description.abstract | This study successfully developed several organic photoelectronic materials, employing them as self-assembled monolayers (SAMs) deposited on NiOx film for tin perovskite solar cells (TPSCs).
In the first series, developed primarily based on TPA as the core, one end of the core was functionalized with dimethoxy-substituted triphenylamine as a terminal electron-donating group, while the other end was modified with electron-withdrawing groups: malononitrile (MN), ethyl cyanoacetate (CA)、diethyl cyanomethyl phosphonate (PE) and cyanomethyl phosphonic acid (PA) as anchoring groups. Additionally, thiophene units were incorporated to extend the conjugation length, and various electron-donating groups were attached to regulate the energy level of the materials and enhance the intramolecular charge transfer effect. Development of a series of organic optoelectronic materials. Among these, TPA-T-CA (4), 4TPA-PE (5a), and 4TPA-PA (6a) SAM-based TPSC devices exhibited promising efficiencies of 8.2%, 9.1%, and 8.7%, respectively. These outstanding results exceeded the highest reported efficiency of 8.3% in TPSCs. Further optimization of these series is ongoing.
The second series, developed primarily based on Cyclopentane dithiophene (CDT)as the core, with one end of the core functionalized with dimethoxy-substituted triphenylamine as a terminal electron-donating group, and the other end modified with electron-withdrawing groups: malononitrile (MN), ethyl cyanoacetate (CA)、diethyl cyanomethyl phosphonate (PE) and cyanomethyl phosphonic acid (PA) as anchoring groups, various electron-donating groups were attached to regulate the energy level of the materials and enhance the intramolecular charge transfer effect. Subsequently, different lengths of thioalkyl chains were attached to the core to enhance intermolecular interactions and solubility. This aimed to develop novel optoelectronic materials with NiOx for tin perovskite solar cells, fabricated into devices via self-assembly. These outstanding results exceeded the highest reported efficiency of 8.3% in TPSCs. | en_US |