Research
Energy materials and surface science with focus on ultra-high vacuum (UHV) characterization techniques and fabrication of perovskite halide solar cells using solution and vapor deposition methods.
Teaching
- CBAD81 Functional Materials' Laboratory.
- CBAD81 Functional Materials,Guest lecturer on Perovskite materials.
- FYGC09 Solid State Physics, Exercise classes.
Selected publications
Hawash, Z.; Ono, L. K.; Qi, Y. B.,* Recent Advances in Spiro-MeOTAD Hole Transport Material and Its Applications in Organic-inorganic Halide Perovskite Solar Cells. Adv. Mater. Interfaces, 2017, 1700623. (Invited review article)
Hawash, Z.; Ono, L. K.; Raga, S. R.; Son, D. Y.; Park, N. G.;* Qi, Y. B.,* Interfacial Modification of Perovskite Solar Cells Using an Ultrathin MAI Layer Leads to Enhanced Energy Level Alignment, Efficiencies, and Reproducibility, J. Phys. Chem. Lett. 2017, 8, 3947.
Juarez-Perez, E. J.; Hawash, Z.; Raga, S. R.; Ono, L. K.; Qi, Y. B.,* Thermal Degradation of CH3NH3PbI3 Perovskite into NH3 and CH3I Gases Observed by Coupled Thermogravimetry-Mass Spectrometry Analysis. Energy Environ. Sci. 2016 , 9, 3406.
Hawash, Z; Ono, L. K.; Qi, Y. B.,* Moisture and Oxygen Enhance Conductivity of LiTFSI-Doped Spiro-MeOTAD Hole Transport Layer in Perovskite Solar Cells. Adv. Mater. Interfaces 2016, 3, 1600117.
Hawash, Z.; Ono, L. K.; Raga, S. R.; Lee, M. V.; Qi, Y. B.,* Air-Exposure Induced Dopant Redistribution and Energy Level Shifts in Spin-Coated Spiro-MeOTAD Films. Chem. Mater. 2015, 27, 562.