- Hybrid Perovskites with Larger Organic Cations Reveal Autocatalytic Degradation Kinetics and Increased Stability under Light
- Summary: We discovered that hybrid perovskites, a promising new photovoltaic material, break down under light via a unique autocatalytic mechanism. We were able to use this knowledge to design new perovskite derivatives that are more stable to light, addressing a major barrier to hybrid perovskite commercialization.
- Ellis, C.L.C., Javaid, H., Smith, E.C., Venkataraman, D. Inorg Chem 2020, 59 (17), 12176-12186.
- The Use of Ion-Selective Membranes to Study Cation Transport in Hybrid Organic-Inorganic Perovskites
- Summary: We found evidence that when light is shone on hybrid perovskites, an organic ion called methylammonium is able to move through the material, addressing a major point of contention in the field. We did this by creating a new layer in perovskite photovoltaic devices that would only allow methylammonium ions to pass through.
- Smith, E.C, Ellis, C.L.C., Javaid, H., Arden, B.G., Venkataraman, D.; Phys Chem ChemPhys, 2019, 21, 20720-20726.
- Interplay Between Ion Transport, Applied Bias, and Degradation under Illumination in Hybrid Perovskite p-i-n Devices
- Summary: We discovered that ions in hybrid perovskites move in surprising but predictable ways in response to light and applied voltage as they break down, which has implications for their stability and potential applications.
- Smith, E.C., Ellis, C.L.C., Javaid, H., Renna, Liu, Y., Russell, T.P., Bag, M., Venkataraman, D.; J Phys Chem C 2018, 122 (25), 13986-13994.
- Ion Migration in Hybrid Perovskites: Evolving Understanding of a Dynamic Phenomenon
- Summary: Chapter 6 of a book on hybrid perovskite photovoltaic materials. We examined the controversial topic of ion transport in hybrid perovskite literature and how evidence gathered over the past few years has rapidly changed our understanding of this phenomenon.
- Ellis, C.L.C., Smith, E.C., Javaid, H., Berns, G., Venkataraman, D.; Perovskite Photovoltaics: Basics to Advanced Concepts and Implementation.” Elsevier, 1st ed, 2018, 163-196.
- Indoor Light Recycling: A New Home for Organic Photovoltaics
- Summary: Many people use “Solar Cell” and “Photovoltaic” interchangeably, but this misses the fact that photovoltaics can absorb any kind of light – not just sunlight (solar). In fact, solar cell devices that don’t work well in sunlight often have very different performances in indoor light. We explored the potential of some of these materials for powering indoor devices.
- Cutting, C.L.(*); Bag, M.; Venkataraman, D.; J Mater Chem C 2016, 4, 10367–10370.
- Shifting Perspective: Photovoltaics for Indoor Light Applications
- Poster based on the work in my published article “Indoor Light Recycling: A New Home for Organic Photovoltaics”
- Cutting, C.L.(*); Bag, M.; Venkataraman, D. Poster Presentation, UMass Chemistry Department ResearchFest 2015.
- Winner of William E. McEwen Fellowship Award for Outstanding Poster
- Evidence for Reduced Charge Recombination in Carbon Nanotube/perovskite-Based Active Layers
- Summary: We found that mixing carbon nanotubes in with perovskites in photovoltaic devices can improve the performance by keeping electrons and holes from recombining, allowing more of them to reach their respective electrodes.
- Bag, M.; Renna, L.; Jeong, S.; Han, X.; Cutting, C.L.(*); Maroudas, D.; Venkataraman, D.; Chem Phys Lett 2016, 662, 35–41.
- Organic Photovoltaic Devices and Methods Thereof
- Summary: A patented method for making photovoltaic devices out of nanoparticles of organic polymers and small molecules which are suspended in water. The use of water in this method instead of typical solvents like chlorobenzene makes it a more environmentally-friendly method to manufacture many types of organic solar cells.
- Venkataraman, D.; Bag, M.; Gehan, T.S.; Cutting, C.L.(*); 2015, PCT International Application No. PCT/US15/27436.
* Cutting is my maiden name and, as of October 2017, is my second middle name.