Researchers at POSTECH have created novel polymeric gap transport supplies to extend the effectivity of perovskite quantum dot photo voltaic cells.
Photo voltaic cells are eco-friendly energy sources, lowering environmental air pollution. Perovskite quantum dot cells provide decrease manufacturing prices and compatibility with versatile supplies, distinguishing them from standard silicon cells. Nonetheless, perovskite cell effectivity depends on gap transport supplies for cost transportation. Typical supplies degrade shortly with dopants, necessitating analysis into dopant-free alternate options.
The analysis crew led by Professor Taiho Park and Ph.D. candidates Dae Hwan Lee and Seyeong Lim from the Division of Chemical Engineering at POSTECH have developed a novel polymeric gap transport supplies design for perovskite quantum dot photo voltaic cells. This innovation resulted in a considerable enhancement of the cells’ effectivity.
The analysis crew developed gap transport supplies comprising sulfur and selenium compound-based polymers. These polymers possess particular structural traits like planarization and intermolecular association locking, enhancing cost mobility. Furthermore, the polymers’ uneven alkyl substituents promote molecular interactions, successfully complementing {the electrical} properties of cells.
Experiments had been performed utilizing a management group to evaluate the efficacy of the just lately developed polymers. The findings revealed that photo voltaic cells using gap transport supplies containing selenium compounds achieved an influence conversion effectivity (PCE) of 15.2%. Remarkably, even after 40 days, these cells retained 80% of their preliminary PCE, demonstrating the long-term stability and sturdiness of the polymers. The analysis demonstrates that the newly developed gap transport supplies can considerably improve cost mobility in dopant-free perovskite quantum dot photo voltaic cells. Remarkably, these supplies obtain the best energy conversion effectivity (PCE) and contribute to elevated stability within the absence of dopants.
Professor Taiho Park, main the analysis, acknowledged that the findings mark a paradigm shift from conventional cost transport supplies and anticipate their utilization in future photo voltaic cell system analysis.
Reference : Dae Hwan Lee et al, Tailoring Inflexible Segments in Dopant-Free Polymeric Gap Transport Supplies for Perovskite Quantum Dot Photo voltaic Cells, ACS Power Letters (2023). DOI: 10.1021/acsenergylett.3c00211
