Device Performance and Charge Carrier Dynamics in Organic Solar Cells: The Impact of Donor Polymer Properties and Morphology Naresh Chandrasekaran 10.26180/5c6a2aa5f2a98 https://bridges.monash.edu/articles/thesis/Device_Performance_and_Charge_Carrier_Dynamics_in_Organic_Solar_Cells_The_Impact_of_Donor_Polymer_Properties_and_Morphology/7730804 Organic photovoltaic (OPV) technology has a potential advantage over inorganic photovoltaics because of low fabrication cost and mass production through roll-to-roll or injects printing techniques. In the recent years, OPV technology has reached efficiencies more than 13%, making it a viable candidate for future energy production. The performance of the organic solar cells strongly depends on the morphology of the active layer and properties of the donor polymer like regioregularity, and molecular weight. This thesis is devoted to understanding the role of poly(3-hexylthiophene) polymer regioregularity and molecular weight on the device performance, morphology and charge carrier dynamics inside the device. In addition to this, the influence of bulk morphology and domain purity on charge carrier recombination is also investigated in detail using various X-ray synchrotron and transient photovoltaic measurement techniques in high performance low bandgap OPV devices. <br> 2019-02-18 03:46:43 organic solar cells hexylthiophene P3HT device physics regioregularity transient photovoltage molecular weight bulk morphology Renewable Power and Energy Systems Engineering (excl. Solar Cells)