Ultrathin film photovoltaic (PV) devices have received considerable interest as candidates for the low-cost alternatives of thick, wafer-based PV devices. To overcome the low light absorption due to low optical penetration length of the ultrathin films, a new concept of a energy transfer-based hybrid PV system has been proposed where a strong light absorber is coupled with a high-mobility semiconductor layer. In operation, sunlight energy harvested by the strong light absorbing component is radiatively and nonradiatively transferred to the high-mobility semiconductor component where charge carriers are separated and transported to electrodes. We have developed an ultrathin (sub micron) c-Si PV platform based on Metal-Insulator-Semiconductor solar cell model to investigate the effects of energy transfer from the inorganic quantum dots to the Si layer.
Son Hoang, Sean P. Berglund, Nathan T. Hahn, Allen J. Bard, and C. Buddie Mullins, Enhancing visible light photo-oxidation of water with TiO2 nanowire arrays via co-treatment with H2 and NH3: Synergistic effects between Ti3+ and N, J. Am. Chem. Soc. 134, 3659-3662 (2012).
Son Hoang, Siwei Guo, Nathan T. Hahn, Allen J. Bard, and C. Buddie Mullins, Visible-light driven photoelectrochemical water oxidation on nitrogen-doped TiO2 nanowires, Nano Lett. 12, 26-32 (2012)
Son Hoang, Sean P. Berglund, Raymond R. Fullon, Ryan L. Minter, and C. Buddie Mullins, Chemical bath deposition of vertically aligned TiO2 nanoplatelet arrays for solar energy conversion applications, J. Mater. Chem. A 1, 4307-4315 (2013)
Nathan T. Hahn, Son Hoang, Jeffrey L. Self, and C. Buddie Mullins, Spray pyrolysis deposition and photoelectrochemical properties of n-type BiOI nano-platelet thin films, ACS Nano 6, 7712-7722(2012)